/**
 * @license
 * Copyright 2026 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import {
  describe,
  it,
  expect,
  vi,
  beforeEach,
  afterEach,
  type Mock,
} from 'vitest';
import {
  Config,
  DEFAULT_FILE_FILTERING_OPTIONS,
  type ConfigParameters,
  type SandboxConfig,
} from './config.js';
import { createMockSandboxConfig } from '@google/gemini-cli-test-utils';
import { DEFAULT_MAX_ATTEMPTS } from '../utils/retry.js';
import { ExperimentFlags } from '../code_assist/experiments/flagNames.js';
import { debugLogger } from '../utils/debugLogger.js';
import { coreEvents } from '../utils/events.js';
import { ApprovalMode } from '../policy/types.js';
import {
  HookType,
  HookEventName,
  type HookDefinition,
} from '../hooks/types.js';
import { FileDiscoveryService } from '../services/fileDiscoveryService.js';
import * as path from 'node:path';
import * as fs from 'node:fs';
import { setGeminiMdFilename as mockSetGeminiMdFilename } from '../tools/memoryTool.js';
import {
  DEFAULT_TELEMETRY_TARGET,
  DEFAULT_OTLP_ENDPOINT,
  uiTelemetryService,
} from '../telemetry/index.js';
import {
  AuthType,
  createContentGenerator,
  createContentGeneratorConfig,
  type ContentGeneratorConfig,
  type ContentGenerator,
} from '../core/contentGenerator.js';
import { GeminiClient } from '../core/client.js';
import { GitService } from '../services/gitService.js';
import { ShellTool } from '../tools/shell.js';
import { AgentTool } from '../agents/agent-tool.js';
import { ReadFileTool } from '../tools/read-file.js';
import { GrepTool } from '../tools/grep.js';
import { RipGrepTool, resolveRipgrepPath } from '../tools/ripGrep.js';
import {
  logRipgrepFallback,
  logApprovalModeDuration,
} from '../telemetry/loggers.js';
import { RipgrepFallbackEvent } from '../telemetry/types.js';
import { ToolRegistry } from '../tools/tool-registry.js';
import { ACTIVATE_SKILL_TOOL_NAME } from '../tools/tool-names.js';
import type { SkillDefinition } from '../skills/skillLoader.js';
import type { McpClientManager } from '../tools/mcp-client-manager.js';
import { DEFAULT_MODEL_CONFIGS } from './defaultModelConfigs.js';
import {
  DEFAULT_GEMINI_MODEL,
  PREVIEW_GEMINI_3_1_MODEL,
  DEFAULT_GEMINI_MODEL_AUTO,
  PREVIEW_GEMINI_MODEL_AUTO,
  PREVIEW_GEMINI_FLASH_MODEL,
} from './models.js';
import { Storage } from './storage.js';
import type { AgentLoopContext } from './agent-loop-context.js';
import {
  runWithScopedAutoMemoryExtractionWriteAccess,
  runWithScopedMemoryInboxAccess,
} from './scoped-config.js';

vi.mock('fs', async (importOriginal) => {
  const actual = await importOriginal<typeof import('fs')>();
  return {
    ...actual,
    existsSync: vi.fn().mockReturnValue(true),
    statSync: vi.fn().mockReturnValue({
      isDirectory: vi.fn().mockReturnValue(true),
    }),
    realpathSync: vi.fn((path) => path),
  };
});

vi.mock('../utils/paths.js', async (importOriginal) => {
  const actual = await importOriginal<typeof import('../utils/paths.js')>();
  return {
    ...actual,
    resolveToRealPath: vi.fn((p) => p),
  };
});

vi.mock('../utils/fileUtils.js', () => ({
  fileExists: vi.fn(),
}));

vi.mock('../utils/shell-utils.js', () => ({
  resolveExecutable: vi.fn(),
}));

// Mock dependencies that might be called during Config construction or createServerConfig
vi.mock('../tools/tool-registry', () => {
  const ToolRegistryMock = vi.fn();
  ToolRegistryMock.prototype.registerTool = vi.fn();
  ToolRegistryMock.prototype.unregisterTool = vi.fn();
  ToolRegistryMock.prototype.discoverAllTools = vi.fn();
  ToolRegistryMock.prototype.sortTools = vi.fn();
  ToolRegistryMock.prototype.getAllTools = vi.fn(() => []); // Mock methods if needed
  ToolRegistryMock.prototype.getTool = vi.fn();
  ToolRegistryMock.prototype.getAllToolNames = vi.fn(() => []);
  ToolRegistryMock.prototype.getFunctionDeclarations = vi.fn(() => []);
  return { ToolRegistry: ToolRegistryMock };
});

vi.mock('../tools/mcp-client-manager.js', () => ({
  McpClientManager: vi.fn().mockImplementation(() => ({
    startConfiguredMcpServers: vi.fn(),
    getMcpInstructions: vi.fn().mockReturnValue('MCP Instructions'),
    setMainRegistries: vi.fn(),
  })),
}));

// Mock individual tools if their constructors are complex or have side effects
vi.mock('../tools/ls');
vi.mock('../tools/read-file');
vi.mock('../tools/grep.js');
vi.mock('../tools/ripGrep.js', () => ({
  resolveRipgrepPath: vi.fn(),
  RipGrepTool: class MockRipGrepTool {},
}));
vi.mock('../tools/glob');
vi.mock('../tools/edit');
vi.mock('../tools/shell');
vi.mock('../tools/write-file');
vi.mock('../tools/web-fetch');
vi.mock('../tools/read-many-files');
vi.mock('../tools/memoryTool', async (importOriginal) => {
  const actual =
    await importOriginal<typeof import('../tools/memoryTool.js')>();
  return {
    ...actual,
    setGeminiMdFilename: vi.fn(),
    getCurrentGeminiMdFilename: vi.fn(() => 'GEMINI.md'),
  };
});

vi.mock('../core/contentGenerator.js');

vi.mock('../core/client.js', () => ({
  GeminiClient: vi.fn().mockImplementation(() => ({
    initialize: vi.fn().mockResolvedValue(undefined),
    stripThoughtsFromHistory: vi.fn(),
    isInitialized: vi.fn().mockReturnValue(false),
    setTools: vi.fn().mockResolvedValue(undefined),
    updateSystemInstruction: vi.fn(),
  })),
}));

vi.mock('../telemetry/index.js', async (importOriginal) => {
  const actual = await importOriginal<typeof import('../telemetry/index.js')>();
  return {
    ...actual,
    initializeTelemetry: vi.fn(),
    uiTelemetryService: {
      getLastPromptTokenCount: vi.fn(),
    },
  };
});

vi.mock('../telemetry/loggers.js', async (importOriginal) => {
  const actual =
    await importOriginal<typeof import('../telemetry/loggers.js')>();
  return {
    ...actual,
    logRipgrepFallback: vi.fn(),
    logApprovalModeDuration: vi.fn(),
  };
});

vi.mock('../services/gitService.js', () => {
  const GitServiceMock = vi.fn();
  GitServiceMock.prototype.initialize = vi.fn();
  return { GitService: GitServiceMock };
});

vi.mock('../services/fileDiscoveryService.js');

vi.mock('../ide/ide-client.js', () => ({
  IdeClient: {
    getInstance: vi.fn().mockResolvedValue({
      getConnectionStatus: vi.fn(),
      initialize: vi.fn(),
      shutdown: vi.fn(),
    }),
  },
}));

vi.mock('../agents/registry.js', () => {
  const AgentRegistryMock = vi.fn();
  AgentRegistryMock.prototype.initialize = vi.fn();
  AgentRegistryMock.prototype.getAllDefinitions = vi.fn(() => []);
  AgentRegistryMock.prototype.getAllDiscoveredAgentNames = vi.fn(() => []);
  AgentRegistryMock.prototype.getDefinition = vi.fn();
  return { AgentRegistry: AgentRegistryMock };
});

vi.mock('../resources/resource-registry.js', () => ({
  ResourceRegistry: vi.fn(),
}));

const mockCoreEvents = vi.hoisted(() => ({
  emitFeedback: vi.fn(),
  emitModelChanged: vi.fn(),
  emitConsoleLog: vi.fn(),
  emitQuotaChanged: vi.fn(),
  on: vi.fn(),
  emit: vi.fn(),
}));

const mockSetGlobalProxy = vi.hoisted(() => vi.fn());

vi.mock('../utils/events.js', async (importOriginal) => {
  const actual = await importOriginal<typeof import('../utils/events.js')>();
  return {
    ...actual,
    coreEvents: mockCoreEvents,
  };
});

vi.mock('../utils/fetch.js', () => ({
  setGlobalProxy: mockSetGlobalProxy,
}));

vi.mock('../context/memoryContextManager.js', () => ({
  MemoryContextManager: vi.fn().mockImplementation(() => ({
    refresh: vi.fn(),
    getGlobalMemory: vi.fn().mockReturnValue(''),
    getExtensionMemory: vi.fn().mockReturnValue(''),
    getEnvironmentMemory: vi.fn().mockReturnValue(''),
    getUserProjectMemory: vi.fn().mockReturnValue(''),
    getLoadedPaths: vi.fn().mockReturnValue(new Set()),
  })),
}));

import { BaseLlmClient } from '../core/baseLlmClient.js';
import { tokenLimit } from '../core/tokenLimits.js';
import { getCodeAssistServer } from '../code_assist/codeAssist.js';
import { getExperiments } from '../code_assist/experiments/experiments.js';
import type { CodeAssistServer } from '../code_assist/server.js';
import { MemoryContextManager } from '../context/memoryContextManager.js';
import { UserTierId } from '../code_assist/types.js';
import type {
  ModelConfigService,
  ModelConfigServiceConfig,
} from '../services/modelConfigService.js';
import { LocalLiteRtLmClient } from '../core/localLiteRtLmClient.js';

vi.mock('../core/baseLlmClient.js');
vi.mock('../core/localLiteRtLmClient.js');
vi.mock('../core/tokenLimits.js', () => ({
  tokenLimit: vi.fn(),
}));
vi.mock('../code_assist/codeAssist.js');
vi.mock('../code_assist/experiments/experiments.js');

afterEach(() => {
  vi.clearAllMocks();
});

describe('Server Config (config.ts)', () => {
  const MODEL = DEFAULT_GEMINI_MODEL;
  const SANDBOX: SandboxConfig = createMockSandboxConfig({
    command: 'docker',
    image: 'gemini-cli-sandbox',
  });
  const TARGET_DIR = '/path/to/target';
  const DEBUG_MODE = false;
  const QUESTION = 'test question';
  const USER_MEMORY = 'Test User Memory';
  const TELEMETRY_SETTINGS = { enabled: false };
  const EMBEDDING_MODEL = 'gemini-embedding';
  const SESSION_ID = 'test-session-id';
  const baseParams: ConfigParameters = {
    cwd: '/tmp',
    embeddingModel: EMBEDDING_MODEL,
    sandbox: SANDBOX,
    targetDir: TARGET_DIR,
    debugMode: DEBUG_MODE,
    question: QUESTION,
    userMemory: USER_MEMORY,
    telemetry: TELEMETRY_SETTINGS,
    sessionId: SESSION_ID,
    model: MODEL,
    usageStatisticsEnabled: false,
  };

  describe('maxAttempts', () => {
    it('should default to DEFAULT_MAX_ATTEMPTS', () => {
      const config = new Config(baseParams);
      expect(config.getMaxAttempts()).toBe(DEFAULT_MAX_ATTEMPTS);
    });

    it('should use provided maxAttempts if <= DEFAULT_MAX_ATTEMPTS', () => {
      const config = new Config({
        ...baseParams,
        maxAttempts: 5,
      });
      expect(config.getMaxAttempts()).toBe(5);
    });

    it('should cap maxAttempts at DEFAULT_MAX_ATTEMPTS', () => {
      const config = new Config({
        ...baseParams,
        maxAttempts: 20,
      });
      expect(config.getMaxAttempts()).toBe(DEFAULT_MAX_ATTEMPTS);
    });
  });

  describe('setShellExecutionConfig', () => {
    it('should preserve existing shell execution fields that are not being updated', () => {
      const config = new Config({
        ...baseParams,
        sandbox: {
          enabled: true,
          command: 'windows-native',
          networkAccess: false,
        },
        shellBackgroundCompletionBehavior: 'notify',
      });

      expect(config.getShellExecutionConfig()).toEqual(
        expect.objectContaining({
          sandboxConfig: expect.objectContaining({
            enabled: true,
            command: 'windows-native',
            networkAccess: false,
          }),
          backgroundCompletionBehavior: 'notify',
        }),
      );

      config.setShellExecutionConfig({
        terminalWidth: 123,
        terminalHeight: 45,
        showColor: true,
        pager: 'cat',
        sanitizationConfig: config.sanitizationConfig,
        sandboxManager: config.sandboxManager,
      });

      expect(config.getShellExecutionConfig()).toEqual(
        expect.objectContaining({
          terminalWidth: 123,
          terminalHeight: 45,
          sandboxConfig: expect.objectContaining({
            enabled: true,
            command: 'windows-native',
            networkAccess: false,
          }),
          backgroundCompletionBehavior: 'notify',
        }),
      );
    });

    it('should ignore properties that are explicitly undefined and preserve existing values', () => {
      const config = new Config(baseParams);

      config.setShellExecutionConfig({
        terminalWidth: 80,
        showColor: true,
      });

      expect(config.getShellExecutionConfig().terminalWidth).toBe(80);
      expect(config.getShellExecutionConfig().showColor).toBe(true);

      // Provide undefined for terminalWidth, which should be ignored
      config.setShellExecutionConfig({
        terminalWidth: undefined,
        showColor: false,
      });

      expect(config.getShellExecutionConfig().terminalWidth).toBe(80); // Should still be 80, not undefined
      expect(config.getShellExecutionConfig().showColor).toBe(false); // Should be updated
    });
  });

  beforeEach(() => {
    // Reset mocks if necessary
    vi.clearAllMocks();
    vi.mocked(getExperiments).mockResolvedValue({
      experimentIds: [],
      flags: {},
    });
  });

  describe('initialize', () => {
    it('should throw an error if checkpointing is enabled and GitService fails', async () => {
      const gitError = new Error('Git is not installed');
      vi.mocked(GitService.prototype.initialize).mockRejectedValue(gitError);

      const config = new Config({
        ...baseParams,
        checkpointing: true,
      });

      await expect(config.initialize()).rejects.toThrow(gitError);
    });

    it('should not throw an error if checkpointing is disabled and GitService fails', async () => {
      const gitError = new Error('Git is not installed');
      vi.mocked(GitService.prototype.initialize).mockRejectedValue(gitError);

      const config = new Config({
        ...baseParams,
        checkpointing: false,
      });

      await expect(config.initialize()).resolves.toBeUndefined();
    });

    it('should deduplicate multiple calls to initialize', async () => {
      const config = new Config({
        ...baseParams,
        checkpointing: false,
      });

      const storageSpy = vi.spyOn(Storage.prototype, 'initialize');

      await Promise.all([
        config.initialize(),
        config.initialize(),
        config.initialize(),
      ]);

      expect(storageSpy).toHaveBeenCalledTimes(1);
    });

    it('should await MCP initialization in non-interactive mode', async () => {
      const config = new Config({
        ...baseParams,
        checkpointing: false,
        // interactive defaults to false
      });

      const { McpClientManager } = await import(
        '../tools/mcp-client-manager.js'
      );
      let mcpStarted = false;

      vi.mocked(McpClientManager).mockImplementation(
        () =>
          ({
            startConfiguredMcpServers: vi.fn().mockImplementation(async () => {
              await new Promise((resolve) => setTimeout(resolve, 50));
              mcpStarted = true;
            }),
            getMcpInstructions: vi.fn(),
            setMainRegistries: vi.fn(),
          }) as Partial<McpClientManager> as McpClientManager,
      );

      await config.initialize();

      // Should wait for MCP to finish
      expect(mcpStarted).toBe(true);
    });

    it('should not await MCP initialization in interactive mode', async () => {
      const config = new Config({
        ...baseParams,
        checkpointing: false,
        interactive: true,
      });

      const { McpClientManager } = await import(
        '../tools/mcp-client-manager.js'
      );
      let mcpStarted = false;
      let resolveMcp: (value: unknown) => void;
      const mcpPromise = new Promise((resolve) => {
        resolveMcp = resolve;
      });

      (McpClientManager as unknown as Mock).mockImplementation(
        () =>
          ({
            startConfiguredMcpServers: vi.fn().mockImplementation(async () => {
              await mcpPromise;
              mcpStarted = true;
            }),
            getMcpInstructions: vi.fn(),
            setMainRegistries: vi.fn(),
          }) as Partial<McpClientManager> as McpClientManager,
      );

      await config.initialize();

      // Should return immediately, before MCP finishes
      expect(mcpStarted).toBe(false);

      // Now let it finish
      resolveMcp!(undefined);
      await new Promise((resolve) => setTimeout(resolve, 0));
      expect(mcpStarted).toBe(true);
    });

    describe('getCompressionThreshold', () => {
      it('should return the local compression threshold if it is set', async () => {
        const config = new Config({
          ...baseParams,
          compressionThreshold: 0.5,
        });
        expect(await config.getCompressionThreshold()).toBe(0.5);
      });

      it('should return the remote experiment threshold if it is a positive number', async () => {
        const config = new Config({
          ...baseParams,
          experiments: {
            flags: {
              [ExperimentFlags.CONTEXT_COMPRESSION_THRESHOLD]: {
                floatValue: 0.8,
              },
            },
          },
        } as unknown as ConfigParameters);
        expect(await config.getCompressionThreshold()).toBe(0.8);
      });

      it('should return undefined if the remote experiment threshold is 0', async () => {
        const config = new Config({
          ...baseParams,
          experiments: {
            flags: {
              [ExperimentFlags.CONTEXT_COMPRESSION_THRESHOLD]: {
                floatValue: 0.0,
              },
            },
          },
        } as unknown as ConfigParameters);
        expect(await config.getCompressionThreshold()).toBeUndefined();
      });

      it('should return undefined if there are no experiments', async () => {
        const config = new Config(baseParams);
        expect(await config.getCompressionThreshold()).toBeUndefined();
      });
    });

    describe('getUserCaching', () => {
      it('should return the remote experiment flag when available', async () => {
        const config = new Config({
          ...baseParams,
          experiments: {
            flags: {
              [ExperimentFlags.USER_CACHING]: {
                boolValue: true,
              },
            },
            experimentIds: [],
          },
        });
        expect(await config.getUserCaching()).toBe(true);
      });

      it('should return false when the remote flag is false', async () => {
        const config = new Config({
          ...baseParams,
          experiments: {
            flags: {
              [ExperimentFlags.USER_CACHING]: {
                boolValue: false,
              },
            },
            experimentIds: [],
          },
        });
        expect(await config.getUserCaching()).toBe(false);
      });

      it('should return undefined if there are no experiments', async () => {
        const config = new Config(baseParams);
        expect(await config.getUserCaching()).toBeUndefined();
      });
    });

    describe('getNumericalRoutingEnabled', () => {
      it('should return true by default if there are no experiments', async () => {
        const config = new Config(baseParams);
        expect(await config.getNumericalRoutingEnabled()).toBe(true);
      });

      it('should return true if the remote flag is set to true', async () => {
        const config = new Config({
          ...baseParams,
          experiments: {
            flags: {
              [ExperimentFlags.ENABLE_NUMERICAL_ROUTING]: {
                boolValue: true,
              },
            },
            experimentIds: [],
          },
        } as unknown as ConfigParameters);
        expect(await config.getNumericalRoutingEnabled()).toBe(true);
      });

      it('should return false if the remote flag is explicitly set to false', async () => {
        const config = new Config({
          ...baseParams,
          experiments: {
            flags: {
              [ExperimentFlags.ENABLE_NUMERICAL_ROUTING]: {
                boolValue: false,
              },
            },
            experimentIds: [],
          },
        } as unknown as ConfigParameters);
        expect(await config.getNumericalRoutingEnabled()).toBe(false);
      });
    });

    describe('getResolvedClassifierThreshold', () => {
      it('should return 90 by default if there are no experiments', async () => {
        const config = new Config(baseParams);
        expect(await config.getResolvedClassifierThreshold()).toBe(90);
      });

      it('should return the remote flag value if it is within range (0-100)', async () => {
        const config = new Config({
          ...baseParams,
          experiments: {
            flags: {
              [ExperimentFlags.CLASSIFIER_THRESHOLD]: {
                intValue: '75',
              },
            },
            experimentIds: [],
          },
        } as unknown as ConfigParameters);
        expect(await config.getResolvedClassifierThreshold()).toBe(75);
      });

      it('should return 90 if the remote flag is out of range (less than 0)', async () => {
        const config = new Config({
          ...baseParams,
          experiments: {
            flags: {
              [ExperimentFlags.CLASSIFIER_THRESHOLD]: {
                intValue: '-10',
              },
            },
            experimentIds: [],
          },
        } as unknown as ConfigParameters);
        expect(await config.getResolvedClassifierThreshold()).toBe(90);
      });

      it('should return 90 if the remote flag is out of range (greater than 100)', async () => {
        const config = new Config({
          ...baseParams,
          experiments: {
            flags: {
              [ExperimentFlags.CLASSIFIER_THRESHOLD]: {
                intValue: '110',
              },
            },
            experimentIds: [],
          },
        } as unknown as ConfigParameters);
        expect(await config.getResolvedClassifierThreshold()).toBe(90);
      });
    });

    describe('getGemini31LaunchedSync', () => {
      it.each([AuthType.USE_GEMINI, AuthType.USE_VERTEX_AI, AuthType.GATEWAY])(
        'should return true for %s',
        async (authType) => {
          const config = new Config(baseParams);
          vi.mocked(createContentGeneratorConfig).mockResolvedValue({
            authType,
          });
          await config.refreshAuth(authType);
          expect(config.getGemini31LaunchedSync()).toBe(true);
        },
      );

      it('should fallback to experiments for other auth types', async () => {
        vi.mocked(getExperiments).mockResolvedValue({
          experimentIds: [],
          flags: {
            [ExperimentFlags.GEMINI_3_1_PRO_LAUNCHED]: {
              flagId: ExperimentFlags.GEMINI_3_1_PRO_LAUNCHED,
              boolValue: true,
            },
          },
        });

        const config = new Config(baseParams);

        vi.mocked(createContentGeneratorConfig).mockResolvedValue({
          authType: AuthType.LOGIN_WITH_GOOGLE,
        });

        await config.refreshAuth(AuthType.LOGIN_WITH_GOOGLE);
        expect(config.getGemini31LaunchedSync()).toBe(true);
      });
    });

    describe('getProModelNoAccessSync', () => {
      it('should return experiment value for AuthType.LOGIN_WITH_GOOGLE', async () => {
        vi.mocked(getExperiments).mockResolvedValue({
          experimentIds: [],
          flags: {
            [ExperimentFlags.PRO_MODEL_NO_ACCESS]: {
              boolValue: true,
            },
          },
        });
        const config = new Config(baseParams);
        vi.mocked(createContentGeneratorConfig).mockResolvedValue({
          authType: AuthType.LOGIN_WITH_GOOGLE,
        });
        await config.refreshAuth(AuthType.LOGIN_WITH_GOOGLE);
        expect(config.getProModelNoAccessSync()).toBe(true);
      });

      it('should return experiment value for AuthType.COMPUTE_ADC', async () => {
        vi.mocked(getExperiments).mockResolvedValue({
          experimentIds: [],
          flags: {
            [ExperimentFlags.PRO_MODEL_NO_ACCESS]: {
              boolValue: true,
            },
          },
        });
        const config = new Config(baseParams);
        vi.mocked(createContentGeneratorConfig).mockResolvedValue({
          authType: AuthType.COMPUTE_ADC,
        });
        await config.refreshAuth(AuthType.COMPUTE_ADC);
        expect(config.getProModelNoAccessSync()).toBe(true);
      });

      it('should return false for other auth types even if experiment is true', async () => {
        vi.mocked(getExperiments).mockResolvedValue({
          experimentIds: [],
          flags: {
            [ExperimentFlags.PRO_MODEL_NO_ACCESS]: {
              boolValue: true,
            },
          },
        });
        const config = new Config(baseParams);
        vi.mocked(createContentGeneratorConfig).mockResolvedValue({
          authType: AuthType.USE_GEMINI,
        });
        await config.refreshAuth(AuthType.USE_GEMINI);
        expect(config.getProModelNoAccessSync()).toBe(false);
      });
    });

    describe('getRequestTimeoutMs', () => {
      it('should return undefined if the flag is not set', () => {
        const config = new Config(baseParams);
        expect(config.getRequestTimeoutMs()).toBeUndefined();
      });

      it('should return timeout in milliseconds if flag is set', () => {
        const config = new Config({
          ...baseParams,
          experiments: {
            flags: {
              [ExperimentFlags.DEFAULT_REQUEST_TIMEOUT]: {
                intValue: '30',
              },
            },
            experimentIds: [],
          },
        } as unknown as ConfigParameters);
        expect(config.getRequestTimeoutMs()).toBe(30000);
      });

      it('should return undefined if intValue is not a valid integer', () => {
        const config = new Config({
          ...baseParams,
          experiments: {
            flags: {
              [ExperimentFlags.DEFAULT_REQUEST_TIMEOUT]: {
                intValue: 'abc',
              },
            },
            experimentIds: [],
          },
        } as unknown as ConfigParameters);
        expect(config.getRequestTimeoutMs()).toBeUndefined();
      });

      it('should return undefined if intValue is negative', () => {
        const config = new Config({
          ...baseParams,
          experiments: {
            flags: {
              [ExperimentFlags.DEFAULT_REQUEST_TIMEOUT]: {
                intValue: '-10',
              },
            },
            experimentIds: [],
          },
        } as unknown as ConfigParameters);
        expect(config.getRequestTimeoutMs()).toBeUndefined();
      });
    });
  });

  describe('refreshAuth', () => {
    it('should refresh auth and update config', async () => {
      const config = new Config(baseParams);
      const authType = AuthType.USE_GEMINI;
      const mockContentConfig = {
        apiKey: 'test-key',
      };

      vi.mocked(createContentGeneratorConfig).mockResolvedValue(
        mockContentConfig,
      );

      await config.refreshAuth(authType);

      expect(createContentGeneratorConfig).toHaveBeenCalledWith(
        config,
        authType,
        undefined,
        undefined,
        undefined,
        undefined,
      );
      // Verify that contentGeneratorConfig is updated
      expect(config.getContentGeneratorConfig()).toEqual(mockContentConfig);
      expect(GeminiClient).toHaveBeenCalledWith(config);
    });

    it('should clear fallback overrides when refreshing auth', async () => {
      const config = new Config(baseParams);
      config.activateFallbackMode('fallback-model', 'failed-model');
      expect(config.getFallbackOverride('failed-model')).toBe('fallback-model');

      await config.refreshAuth(AuthType.USE_GEMINI);

      expect(config.getFallbackOverride('failed-model')).toBeUndefined();
    });

    it('should pass Vertex AI routing settings when refreshing auth', async () => {
      const vertexAiRouting = {
        requestType: 'shared' as const,
        sharedRequestType: 'priority' as const,
      };
      const config = new Config({
        ...baseParams,
        vertexAiRouting,
      });

      vi.mocked(createContentGeneratorConfig).mockResolvedValue({});

      await config.refreshAuth(AuthType.USE_VERTEX_AI);

      expect(createContentGeneratorConfig).toHaveBeenCalledWith(
        config,
        AuthType.USE_VERTEX_AI,
        undefined,
        undefined,
        undefined,
        vertexAiRouting,
      );
    });

    it('should reset model availability status', async () => {
      const config = new Config(baseParams);
      const service = config.getModelAvailabilityService();
      const spy = vi.spyOn(service, 'reset');

      vi.mocked(createContentGeneratorConfig).mockImplementation(
        async (_: Config, authType: AuthType | undefined) =>
          ({
            authType,
          }) as Partial<ContentGeneratorConfig> as ContentGeneratorConfig,
      );

      await config.refreshAuth(AuthType.USE_GEMINI);

      expect(spy).toHaveBeenCalled();
    });

    it('should strip thoughts when switching from GenAI to Vertex', async () => {
      const config = new Config(baseParams);

      vi.mocked(createContentGeneratorConfig).mockImplementation(
        async (_: Config, authType: AuthType | undefined) =>
          ({
            authType,
          }) as Partial<ContentGeneratorConfig> as ContentGeneratorConfig,
      );

      await config.refreshAuth(AuthType.USE_GEMINI);

      await config.refreshAuth(AuthType.LOGIN_WITH_GOOGLE);

      const loopContext: AgentLoopContext = config;
      expect(
        loopContext.geminiClient.stripThoughtsFromHistory,
      ).toHaveBeenCalledWith();
    });

    it('should strip thoughts when switching from GenAI to Vertex AI', async () => {
      const config = new Config(baseParams);

      vi.mocked(createContentGeneratorConfig).mockImplementation(
        async (_: Config, authType: AuthType | undefined) =>
          ({
            authType,
          }) as Partial<ContentGeneratorConfig> as ContentGeneratorConfig,
      );

      await config.refreshAuth(AuthType.USE_GEMINI);

      await config.refreshAuth(AuthType.USE_VERTEX_AI);

      const loopContext: AgentLoopContext = config;
      expect(
        loopContext.geminiClient.stripThoughtsFromHistory,
      ).toHaveBeenCalledWith();
    });

    it('should not strip thoughts when switching from Vertex to GenAI', async () => {
      const config = new Config(baseParams);

      vi.mocked(createContentGeneratorConfig).mockImplementation(
        async (_: Config, authType: AuthType | undefined) =>
          ({
            authType,
          }) as Partial<ContentGeneratorConfig> as ContentGeneratorConfig,
      );

      await config.refreshAuth(AuthType.USE_VERTEX_AI);

      await config.refreshAuth(AuthType.USE_GEMINI);

      const loopContext: AgentLoopContext = config;
      expect(
        loopContext.geminiClient.stripThoughtsFromHistory,
      ).not.toHaveBeenCalledWith();
    });

    it('should switch to flash model if user has no Pro access and model is auto', async () => {
      vi.mocked(getExperiments).mockResolvedValue({
        experimentIds: [],
        flags: {
          [ExperimentFlags.PRO_MODEL_NO_ACCESS]: {
            boolValue: true,
          },
        },
      });

      const config = new Config({
        ...baseParams,
        model: PREVIEW_GEMINI_MODEL_AUTO,
      });

      await config.refreshAuth(AuthType.LOGIN_WITH_GOOGLE);
      await config.getExperimentsAsync();

      await vi.waitFor(() => {
        expect(config.getModel()).toBe(PREVIEW_GEMINI_FLASH_MODEL);
      });
    });

    it('should NOT switch to flash model if user has Pro access and model is auto', async () => {
      vi.mocked(getExperiments).mockResolvedValue({
        experimentIds: [],
        flags: {
          [ExperimentFlags.PRO_MODEL_NO_ACCESS]: {
            boolValue: false,
          },
        },
      });

      const config = new Config({
        ...baseParams,
        model: PREVIEW_GEMINI_MODEL_AUTO,
      });

      await config.refreshAuth(AuthType.LOGIN_WITH_GOOGLE);

      expect(config.getModel()).toBe(PREVIEW_GEMINI_MODEL_AUTO);
    });
  });

  it('Config constructor should store userMemory correctly', () => {
    const config = new Config(baseParams);

    expect(config.getUserMemory()).toBe(USER_MEMORY);
    // Verify other getters if needed
    expect(config.getTargetDir()).toBe(path.resolve(TARGET_DIR)); // Check resolved path
  });

  it('Config constructor should default userMemory to empty string if not provided', () => {
    const paramsWithoutMemory: ConfigParameters = { ...baseParams };
    delete paramsWithoutMemory.userMemory;
    const config = new Config(paramsWithoutMemory);

    expect(config.getUserMemory()).toBe('');
  });

  it('Config constructor should call setGeminiMdFilename with contextFileName if provided', () => {
    const contextFileName = 'CUSTOM_AGENTS.md';
    const paramsWithContextFile: ConfigParameters = {
      ...baseParams,
      contextFileName,
    };
    new Config(paramsWithContextFile);
    expect(mockSetGeminiMdFilename).toHaveBeenCalledWith(contextFileName);
  });

  it('Config constructor should not call setGeminiMdFilename if contextFileName is not provided', () => {
    new Config(baseParams); // baseParams does not have contextFileName
    expect(mockSetGeminiMdFilename).not.toHaveBeenCalled();
  });

  it('should set default file filtering settings when not provided', () => {
    const config = new Config(baseParams);
    expect(config.getFileFilteringRespectGitIgnore()).toBe(
      DEFAULT_FILE_FILTERING_OPTIONS.respectGitIgnore,
    );
  });

  it('should set custom file filtering settings when provided', () => {
    const paramsWithFileFiltering: ConfigParameters = {
      ...baseParams,
      fileFiltering: {
        respectGitIgnore: false,
      },
    };
    const config = new Config(paramsWithFileFiltering);
    expect(config.getFileFilteringRespectGitIgnore()).toBe(false);
  });

  it('should set customIgnoreFilePaths from params', () => {
    const params: ConfigParameters = {
      ...baseParams,
      fileFiltering: {
        customIgnoreFilePaths: ['/path/to/ignore/file'],
      },
    };
    const config = new Config(params);
    expect(config.getCustomIgnoreFilePaths()).toStrictEqual([
      '/path/to/ignore/file',
    ]);
  });

  it('should set customIgnoreFilePaths to empty array if not provided', () => {
    const params: ConfigParameters = {
      ...baseParams,
      fileFiltering: {
        respectGitIgnore: true,
      },
    };
    const config = new Config(params);
    expect(config.getCustomIgnoreFilePaths()).toStrictEqual([]);
  });

  it('should initialize WorkspaceContext with includeDirectories', () => {
    const includeDirectories = ['dir1', 'dir2'];
    const paramsWithIncludeDirs: ConfigParameters = {
      ...baseParams,
      includeDirectories,
    };
    const config = new Config(paramsWithIncludeDirs);
    const workspaceContext = config.getWorkspaceContext();
    const directories = workspaceContext.getDirectories();

    // Should include only the target directory initially
    expect(directories).toHaveLength(1);
    expect(directories).toContain(path.resolve(baseParams.targetDir));

    // The other directories should be in the pending list
    expect(config.getPendingIncludeDirectories()).toEqual(includeDirectories);
  });

  it('Config constructor should set telemetry to true when provided as true', () => {
    const paramsWithTelemetry: ConfigParameters = {
      ...baseParams,
      telemetry: { enabled: true },
    };
    const config = new Config(paramsWithTelemetry);
    expect(config.getTelemetryEnabled()).toBe(true);
  });

  it('Config constructor should set telemetry to false when provided as false', () => {
    const paramsWithTelemetry: ConfigParameters = {
      ...baseParams,
      telemetry: { enabled: false },
    };
    const config = new Config(paramsWithTelemetry);
    expect(config.getTelemetryEnabled()).toBe(false);
  });

  it('Config constructor should default telemetry to default value if not provided', () => {
    const paramsWithoutTelemetry: ConfigParameters = { ...baseParams };
    delete paramsWithoutTelemetry.telemetry;
    const config = new Config(paramsWithoutTelemetry);
    expect(config.getTelemetryEnabled()).toBe(TELEMETRY_SETTINGS.enabled);
  });

  it('Config constructor should set telemetry useCollector to true when provided', () => {
    const paramsWithTelemetry: ConfigParameters = {
      ...baseParams,
      telemetry: { enabled: true, useCollector: true },
    };
    const config = new Config(paramsWithTelemetry);
    expect(config.getTelemetryUseCollector()).toBe(true);
  });

  it('Config constructor should set telemetry useCollector to false when provided', () => {
    const paramsWithTelemetry: ConfigParameters = {
      ...baseParams,
      telemetry: { enabled: true, useCollector: false },
    };
    const config = new Config(paramsWithTelemetry);
    expect(config.getTelemetryUseCollector()).toBe(false);
  });

  it('Config constructor should default telemetry useCollector to false if not provided', () => {
    const paramsWithTelemetry: ConfigParameters = {
      ...baseParams,
      telemetry: { enabled: true },
    };
    const config = new Config(paramsWithTelemetry);
    expect(config.getTelemetryUseCollector()).toBe(false);
  });

  it('should have a getFileService method that returns FileDiscoveryService', () => {
    const config = new Config(baseParams);
    const fileService = config.getFileService();
    expect(fileService).toBeDefined();
  });

  it('should pass file filtering options to FileDiscoveryService', () => {
    const configParams = {
      ...baseParams,
      fileFiltering: {
        respectGitIgnore: false,
        respectGeminiIgnore: false,
        customIgnoreFilePaths: ['.myignore'],
      },
    };

    const config = new Config(configParams);
    config.getFileService();

    expect(FileDiscoveryService).toHaveBeenCalledWith(
      path.resolve(TARGET_DIR),
      {
        respectGitIgnore: false,
        respectGeminiIgnore: false,
        customIgnoreFilePaths: ['.myignore'],
      },
    );
  });

  describe('Usage Statistics', () => {
    it('defaults usage statistics to enabled if not specified', () => {
      const config = new Config({
        ...baseParams,
        usageStatisticsEnabled: undefined,
      });

      expect(config.getUsageStatisticsEnabled()).toBe(true);
    });

    it.each([{ enabled: true }, { enabled: false }])(
      'sets usage statistics based on the provided value (enabled: $enabled)',
      ({ enabled }) => {
        const config = new Config({
          ...baseParams,
          usageStatisticsEnabled: enabled,
        });
        expect(config.getUsageStatisticsEnabled()).toBe(enabled);
      },
    );
  });

  describe('Plan Settings', () => {
    const testCases = [
      {
        name: 'should pass custom plan directory to storage',
        planSettings: { directory: 'custom-plans' },
        expected: 'custom-plans',
      },
      {
        name: 'should call setCustomPlansDir with undefined if directory is not provided',
        planSettings: {},
        expected: undefined,
      },
      {
        name: 'should call setCustomPlansDir with undefined if planSettings is not provided',
        planSettings: undefined,
        expected: undefined,
      },
    ];

    testCases.forEach(({ name, planSettings, expected }) => {
      it(`${name}`, () => {
        const setCustomPlansDirSpy = vi.spyOn(
          Storage.prototype,
          'setCustomPlansDir',
        );
        new Config({
          ...baseParams,
          planSettings,
        });

        expect(setCustomPlansDirSpy).toHaveBeenCalledWith(expected);
        setCustomPlansDirSpy.mockRestore();
      });
    });
  });

  describe('Telemetry Settings', () => {
    it('should return default telemetry target if not provided', () => {
      const params: ConfigParameters = {
        ...baseParams,
        telemetry: { enabled: true },
      };
      const config = new Config(params);
      expect(config.getTelemetryTarget()).toBe(DEFAULT_TELEMETRY_TARGET);
    });

    it('should return provided OTLP endpoint', () => {
      const endpoint = 'http://custom.otel.collector:4317';
      const params: ConfigParameters = {
        ...baseParams,
        telemetry: { enabled: true, otlpEndpoint: endpoint },
      };
      const config = new Config(params);
      expect(config.getTelemetryOtlpEndpoint()).toBe(endpoint);
    });

    it('should return default OTLP endpoint if not provided', () => {
      const params: ConfigParameters = {
        ...baseParams,
        telemetry: { enabled: true },
      };
      const config = new Config(params);
      expect(config.getTelemetryOtlpEndpoint()).toBe(DEFAULT_OTLP_ENDPOINT);
    });

    it('should return provided logPrompts setting', () => {
      const params: ConfigParameters = {
        ...baseParams,
        telemetry: { enabled: true, logPrompts: false },
      };
      const config = new Config(params);
      expect(config.getTelemetryLogPromptsEnabled()).toBe(false);
    });

    it('should return default logPrompts setting (true) if not provided', () => {
      const params: ConfigParameters = {
        ...baseParams,
        telemetry: { enabled: true },
      };
      const config = new Config(params);
      expect(config.getTelemetryLogPromptsEnabled()).toBe(true);
    });

    it('should return default logPrompts setting (true) if telemetry object is not provided', () => {
      const paramsWithoutTelemetry: ConfigParameters = { ...baseParams };
      delete paramsWithoutTelemetry.telemetry;
      const config = new Config(paramsWithoutTelemetry);
      expect(config.getTelemetryLogPromptsEnabled()).toBe(true);
    });

    it('should return default telemetry target if telemetry object is not provided', () => {
      const paramsWithoutTelemetry: ConfigParameters = { ...baseParams };
      delete paramsWithoutTelemetry.telemetry;
      const config = new Config(paramsWithoutTelemetry);
      expect(config.getTelemetryTarget()).toBe(DEFAULT_TELEMETRY_TARGET);
    });

    it('should return default OTLP endpoint if telemetry object is not provided', () => {
      const paramsWithoutTelemetry: ConfigParameters = { ...baseParams };
      delete paramsWithoutTelemetry.telemetry;
      const config = new Config(paramsWithoutTelemetry);
      expect(config.getTelemetryOtlpEndpoint()).toBe(DEFAULT_OTLP_ENDPOINT);
    });

    it('should return provided OTLP protocol', () => {
      const params: ConfigParameters = {
        ...baseParams,
        telemetry: { enabled: true, otlpProtocol: 'http' },
      };
      const config = new Config(params);
      expect(config.getTelemetryOtlpProtocol()).toBe('http');
    });

    it('should return default OTLP protocol if not provided', () => {
      const params: ConfigParameters = {
        ...baseParams,
        telemetry: { enabled: true },
      };
      const config = new Config(params);
      expect(config.getTelemetryOtlpProtocol()).toBe('grpc');
    });

    it('should return default OTLP protocol if telemetry object is not provided', () => {
      const paramsWithoutTelemetry: ConfigParameters = { ...baseParams };
      delete paramsWithoutTelemetry.telemetry;
      const config = new Config(paramsWithoutTelemetry);
      expect(config.getTelemetryOtlpProtocol()).toBe('grpc');
    });
  });

  describe('UseRipgrep Configuration', () => {
    it('should default useRipgrep to true when not provided', () => {
      const config = new Config(baseParams);
      expect(config.getUseRipgrep()).toBe(true);
    });

    it('should set useRipgrep to false when provided as false', () => {
      const paramsWithRipgrep: ConfigParameters = {
        ...baseParams,
        useRipgrep: false,
      };
      const config = new Config(paramsWithRipgrep);
      expect(config.getUseRipgrep()).toBe(false);
    });

    it('should set useRipgrep to true when explicitly provided as true', () => {
      const paramsWithRipgrep: ConfigParameters = {
        ...baseParams,
        useRipgrep: true,
      };
      const config = new Config(paramsWithRipgrep);
      expect(config.getUseRipgrep()).toBe(true);
    });

    it('should default useRipgrep to true when undefined', () => {
      const paramsWithUndefinedRipgrep: ConfigParameters = {
        ...baseParams,
        useRipgrep: undefined,
      };
      const config = new Config(paramsWithUndefinedRipgrep);
      expect(config.getUseRipgrep()).toBe(true);
    });
  });

  describe('UseAlternateBuffer Configuration', () => {
    it('should default useAlternateBuffer to false when not provided', () => {
      const config = new Config(baseParams);
      expect(config.getUseAlternateBuffer()).toBe(false);
    });

    it('should set useAlternateBuffer to true when provided as true', () => {
      const paramsWithAlternateBuffer: ConfigParameters = {
        ...baseParams,
        useAlternateBuffer: true,
      };
      const config = new Config(paramsWithAlternateBuffer);
      expect(config.getUseAlternateBuffer()).toBe(true);
    });

    it('should set useAlternateBuffer to false when explicitly provided as false', () => {
      const paramsWithAlternateBuffer: ConfigParameters = {
        ...baseParams,
        useAlternateBuffer: false,
      };
      const config = new Config(paramsWithAlternateBuffer);
      expect(config.getUseAlternateBuffer()).toBe(false);
    });
  });

  describe('UseWriteTodos Configuration', () => {
    it('should default useWriteTodos to true when not provided', () => {
      const config = new Config(baseParams);
      expect(config.getUseWriteTodos()).toBe(true);
    });

    it('should set useWriteTodos to false when provided as false', () => {
      const params: ConfigParameters = {
        ...baseParams,
        useWriteTodos: false,
      };
      const config = new Config(params);
      expect(config.getUseWriteTodos()).toBe(false);
    });

    it('should disable useWriteTodos for preview models', () => {
      const params: ConfigParameters = {
        ...baseParams,
        model: 'gemini-3-pro-preview',
      };
      const config = new Config(params);
      expect(config.getUseWriteTodos()).toBe(false);
    });

    it('should NOT disable useWriteTodos for non-preview models', () => {
      const params: ConfigParameters = {
        ...baseParams,
        model: 'gemini-2.5-pro',
      };
      const config = new Config(params);
      expect(config.getUseWriteTodos()).toBe(true);
    });
  });

  describe('Event Driven Scheduler Configuration', () => {
    it('should default enableEventDrivenScheduler to true when not provided', () => {
      const config = new Config(baseParams);
      expect(config.isEventDrivenSchedulerEnabled()).toBe(true);
    });

    it('should set enableEventDrivenScheduler to false when provided as false', () => {
      const params: ConfigParameters = {
        ...baseParams,
        enableEventDrivenScheduler: false,
      };
      const config = new Config(params);
      expect(config.isEventDrivenSchedulerEnabled()).toBe(false);
    });
  });

  describe('Shell Tool Inactivity Timeout', () => {
    it('should default to 300000ms (300 seconds) when not provided', () => {
      const config = new Config(baseParams);
      expect(config.getShellToolInactivityTimeout()).toBe(300000);
    });

    it('should convert provided seconds to milliseconds', () => {
      const params: ConfigParameters = {
        ...baseParams,
        shellToolInactivityTimeout: 10, // 10 seconds
      };
      const config = new Config(params);
      expect(config.getShellToolInactivityTimeout()).toBe(10000);
    });
  });

  describe('createToolRegistry', () => {
    it('should register a tool if coreTools contains an argument-specific pattern', async () => {
      const params: ConfigParameters = {
        ...baseParams,
        coreTools: ['ShellTool(git status)'],
      };
      const config = new Config(params);
      await config.initialize();

      // The ToolRegistry class is mocked, so we can inspect its prototype's methods.
      const registerToolMock = (
        (await vi.importMock('../tools/tool-registry')) as {
          ToolRegistry: { prototype: { registerTool: Mock } };
        }
      ).ToolRegistry.prototype.registerTool;

      // Check that registerTool was called for ShellTool
      const wasShellToolRegistered = registerToolMock.mock.calls.some(
        (call) => call[0] instanceof vi.mocked(ShellTool),
      );
      expect(wasShellToolRegistered).toBe(true);

      // Check that registerTool was NOT called for ReadFileTool
      const wasReadFileToolRegistered = registerToolMock.mock.calls.some(
        (call) => call[0] instanceof vi.mocked(ReadFileTool),
      );
      expect(wasReadFileToolRegistered).toBe(false);
    });

    it('should register AgentTool', async () => {
      const config = new Config(baseParams);
      await config.initialize();

      const registerToolMock = (
        (await vi.importMock('../tools/tool-registry')) as {
          ToolRegistry: { prototype: { registerTool: Mock } };
        }
      ).ToolRegistry.prototype.registerTool;

      const wasRegistered = registerToolMock.mock.calls.some(
        (call) => call[0] instanceof vi.mocked(AgentTool),
      );
      expect(wasRegistered).toBe(true);
    });
    it('should register EnterPlanModeTool and ExitPlanModeTool when plan is enabled', async () => {
      const params: ConfigParameters = {
        ...baseParams,
        plan: true,
      };
      const config = new Config(params);

      await config.initialize();

      const registerToolMock = (
        (await vi.importMock('../tools/tool-registry')) as {
          ToolRegistry: { prototype: { registerTool: Mock } };
        }
      ).ToolRegistry.prototype.registerTool;

      const registeredTools = registerToolMock.mock.calls.map(
        (call) => call[0].constructor.name,
      );
      expect(registeredTools).toContain('EnterPlanModeTool');
      expect(registeredTools).toContain('ExitPlanModeTool');
    });

    describe('with minified tool class names', () => {
      beforeEach(() => {
        Object.defineProperty(
          vi.mocked(ShellTool).prototype.constructor,
          'name',
          {
            value: '_ShellTool',
            configurable: true,
          },
        );
      });

      afterEach(() => {
        Object.defineProperty(
          vi.mocked(ShellTool).prototype.constructor,
          'name',
          {
            value: 'ShellTool',
          },
        );
      });

      it('should register a tool if coreTools contains the non-minified class name', async () => {
        const params: ConfigParameters = {
          ...baseParams,
          coreTools: ['ShellTool'],
        };
        const config = new Config(params);
        await config.initialize();

        const registerToolMock = (
          (await vi.importMock('../tools/tool-registry')) as {
            ToolRegistry: { prototype: { registerTool: Mock } };
          }
        ).ToolRegistry.prototype.registerTool;

        const wasShellToolRegistered = registerToolMock.mock.calls.some(
          (call) => call[0] instanceof vi.mocked(ShellTool),
        );
        expect(wasShellToolRegistered).toBe(true);
      });

      it('should register a tool if coreTools contains an argument-specific pattern with the non-minified class name', async () => {
        const params: ConfigParameters = {
          ...baseParams,
          coreTools: ['ShellTool(git status)'],
        };
        const config = new Config(params);
        await config.initialize();

        const registerToolMock = (
          (await vi.importMock('../tools/tool-registry')) as {
            ToolRegistry: { prototype: { registerTool: Mock } };
          }
        ).ToolRegistry.prototype.registerTool;

        const wasShellToolRegistered = registerToolMock.mock.calls.some(
          (call) => call[0] instanceof vi.mocked(ShellTool),
        );
        expect(wasShellToolRegistered).toBe(true);
      });
    });
  });

  describe('getTruncateToolOutputThreshold', () => {
    beforeEach(() => {
      vi.clearAllMocks();
    });

    it('should return the calculated threshold when it is smaller than the default', () => {
      const config = new Config(baseParams);
      vi.mocked(tokenLimit).mockReturnValue(32000);
      vi.mocked(uiTelemetryService.getLastPromptTokenCount).mockReturnValue(
        1000,
      );
      // 4 * (32000 - 1000) = 4 * 31000 = 124000
      // default is 40_000, so min(124000, 40000) = 40000
      expect(config.getTruncateToolOutputThreshold()).toBe(40_000);
    });

    it('should return the default threshold when the calculated value is larger', () => {
      const config = new Config(baseParams);
      vi.mocked(tokenLimit).mockReturnValue(2_000_000);
      vi.mocked(uiTelemetryService.getLastPromptTokenCount).mockReturnValue(
        500_000,
      );
      // 4 * (2_000_000 - 500_000) = 4 * 1_500_000 = 6_000_000
      // default is 40_000
      expect(config.getTruncateToolOutputThreshold()).toBe(40_000);
    });

    it('should use a custom truncateToolOutputThreshold if provided', () => {
      const customParams = {
        ...baseParams,
        truncateToolOutputThreshold: 50000,
      };
      const config = new Config(customParams);
      vi.mocked(tokenLimit).mockReturnValue(8000);
      vi.mocked(uiTelemetryService.getLastPromptTokenCount).mockReturnValue(
        2000,
      );
      // 4 * (8000 - 2000) = 4 * 6000 = 24000
      // custom threshold is 50000
      expect(config.getTruncateToolOutputThreshold()).toBe(24000);

      vi.mocked(tokenLimit).mockReturnValue(32000);
      vi.mocked(uiTelemetryService.getLastPromptTokenCount).mockReturnValue(
        1000,
      );
      // 4 * (32000 - 1000) = 124000
      // custom threshold is 50000
      expect(config.getTruncateToolOutputThreshold()).toBe(50000);
    });
  });

  describe('Proxy Configuration Error Handling', () => {
    beforeEach(() => {
      vi.clearAllMocks();
    });

    it('should call setGlobalProxy when proxy is configured', () => {
      const paramsWithProxy: ConfigParameters = {
        ...baseParams,
        proxy: 'http://proxy.example.com:8080',
      };
      new Config(paramsWithProxy);

      expect(mockSetGlobalProxy).toHaveBeenCalledWith(
        'http://proxy.example.com:8080',
      );
    });

    it('should not call setGlobalProxy when proxy is not configured', () => {
      new Config(baseParams);

      expect(mockSetGlobalProxy).not.toHaveBeenCalled();
    });

    it('should emit error feedback when setGlobalProxy throws an error', () => {
      const proxyError = new Error('Invalid proxy URL');
      mockSetGlobalProxy.mockImplementation(() => {
        throw proxyError;
      });

      const paramsWithProxy: ConfigParameters = {
        ...baseParams,
        proxy: 'http://invalid-proxy:8080',
      };
      new Config(paramsWithProxy);

      expect(mockCoreEvents.emitFeedback).toHaveBeenCalledWith(
        'error',
        'Invalid proxy configuration detected. Check debug drawer for more details (F12)',
        proxyError,
      );
    });

    it('should not emit error feedback when setGlobalProxy succeeds', () => {
      mockSetGlobalProxy.mockImplementation(() => {
        // Success - no error thrown
      });

      const paramsWithProxy: ConfigParameters = {
        ...baseParams,
        proxy: 'http://proxy.example.com:8080',
      };
      new Config(paramsWithProxy);

      expect(mockCoreEvents.emitFeedback).not.toHaveBeenCalled();
    });
  });

  describe('BrowserAgentConfig', () => {
    it('should return default browser agent config when not provided', () => {
      const config = new Config(baseParams);
      const browserConfig = config.getBrowserAgentConfig();

      expect(browserConfig.enabled).toBe(false);
      expect(browserConfig.model).toBeUndefined();
      expect(browserConfig.customConfig.sessionMode).toBe('persistent');
      expect(browserConfig.customConfig.headless).toBe(false);
      expect(browserConfig.customConfig.profilePath).toBeUndefined();
      expect(browserConfig.customConfig.visualModel).toBeUndefined();
    });

    it('should return custom browser agent config from agents.overrides', () => {
      const params: ConfigParameters = {
        ...baseParams,
        agents: {
          overrides: {
            browser_agent: {
              enabled: true,
              modelConfig: { model: 'custom-model' },
            },
          },
          browser: {
            sessionMode: 'existing',
            headless: true,
            profilePath: '/path/to/profile',
            visualModel: 'custom-visual-model',
          },
        },
      };
      const config = new Config(params);
      const browserConfig = config.getBrowserAgentConfig();

      expect(browserConfig.enabled).toBe(true);
      expect(browserConfig.model).toBe('custom-model');
      expect(browserConfig.customConfig.sessionMode).toBe('existing');
      expect(browserConfig.customConfig.headless).toBe(true);
      expect(browserConfig.customConfig.profilePath).toBe('/path/to/profile');
      expect(browserConfig.customConfig.visualModel).toBe(
        'custom-visual-model',
      );
      expect(browserConfig.customConfig.maxActionsPerTask).toBe(100); // default
    });

    it('should return custom maxActionsPerTask', () => {
      const params: ConfigParameters = {
        ...baseParams,
        agents: {
          browser: {
            maxActionsPerTask: 50,
          },
        },
      };
      const config = new Config(params);
      const browserConfig = config.getBrowserAgentConfig();

      expect(browserConfig.customConfig.maxActionsPerTask).toBe(50);
    });

    it('should apply defaults for partial custom config', () => {
      const params: ConfigParameters = {
        ...baseParams,
        agents: {
          overrides: {
            browser_agent: {
              enabled: true,
            },
          },
          browser: {
            headless: true,
          },
        },
      };
      const config = new Config(params);
      const browserConfig = config.getBrowserAgentConfig();

      expect(browserConfig.enabled).toBe(true);
      expect(browserConfig.customConfig.headless).toBe(true);
      // Defaults for unspecified fields
      expect(browserConfig.customConfig.sessionMode).toBe('persistent');
    });
  });

  describe('Sandbox Configuration', () => {
    it('should default sandbox settings when not provided', () => {
      const config = new Config({
        ...baseParams,
        sandbox: undefined,
      });

      expect(config.getSandboxEnabled()).toBe(false);
      expect(config.getSandboxAllowedPaths()).toEqual([
        Storage.getGlobalTempDir(),
      ]);
      expect(config.getSandboxNetworkAccess()).toBe(false);
    });

    it('should store provided sandbox settings', () => {
      const sandbox: SandboxConfig = {
        enabled: true,
        allowedPaths: ['/tmp/foo', '/var/bar'],
        networkAccess: true,
        command: 'docker',
        image: 'my-image',
      };
      const config = new Config({
        ...baseParams,
        sandbox,
      });

      expect(config.getSandboxEnabled()).toBe(true);
      expect(config.getSandboxAllowedPaths()).toEqual([
        '/tmp/foo',
        '/var/bar',
        Storage.getGlobalTempDir(),
      ]);
      expect(config.getSandboxNetworkAccess()).toBe(true);
      expect(config.getSandbox()?.command).toBe('docker');
      expect(config.getSandbox()?.image).toBe('my-image');
    });

    it('should partially override default sandbox settings', () => {
      const config = new Config({
        ...baseParams,
        sandbox: {
          enabled: true,
          allowedPaths: ['/only/this'],
          networkAccess: false,
        } as SandboxConfig,
      });

      expect(config.getSandboxEnabled()).toBe(true);
      expect(config.getSandboxAllowedPaths()).toEqual([
        '/only/this',
        Storage.getGlobalTempDir(),
      ]);
      expect(config.getSandboxNetworkAccess()).toBe(false);
    });

    it('lazily resolves forbidden paths when first accessed', async () => {
      const config = new Config({
        ...baseParams,
        sandbox: { enabled: true, command: 'docker' },
      });

      const fileService = config.getFileService();
      vi.spyOn(fileService, 'getIgnoredPaths').mockResolvedValue([
        '/tmp/forbidden',
      ]);

      await config.initialize();
      expect(fileService.getIgnoredPaths).not.toHaveBeenCalled();

      // Access resolved paths via the internal resolver
      const resolved = await (
        config as unknown as {
          getSandboxForbiddenPaths: () => Promise<string[]>;
        }
      ).getSandboxForbiddenPaths();

      expect(fileService.getIgnoredPaths).toHaveBeenCalled();
      expect(resolved).toEqual(['/tmp/forbidden']);
    });
  });

  it('should have independent TopicState across instances', () => {
    const config1 = new Config(baseParams);
    const config2 = new Config(baseParams);

    config1.topicState.setTopic('Topic 1');
    config2.topicState.setTopic('Topic 2');

    expect(config1.topicState.getTopic()).toBe('Topic 1');
    expect(config2.topicState.getTopic()).toBe('Topic 2');
  });

  it('updates storage session-scoped directories when the sessionId changes', async () => {
    const config = new Config({
      ...baseParams,
      sessionId: 'session-one',
      plan: true,
    });

    await config.initialize();
    const tempDir = config.storage.getProjectTempDir();
    const oldPlansDir = path.join(tempDir, 'session-one', 'plans');
    const oldTrackerService = config.getTrackerService();

    config.setSessionId('session-two');

    expect(config.getSessionId()).toBe('session-two');
    expect(config.storage.getProjectTempPlansDir()).toBe(
      path.join(tempDir, 'session-two', 'plans'),
    );
    expect(config.storage.getProjectTempTrackerDir()).toBe(
      path.join(tempDir, 'session-two', 'tracker'),
    );
    expect(config.getTrackerService()).not.toBe(oldTrackerService);
    expect(config.getTrackerService().trackerDir).toBe(
      path.join(tempDir, 'session-two', 'tracker'),
    );
    expect(config.getWorkspaceContext().getDirectories()).not.toContain(
      oldPlansDir,
    );
  });

  it('clears fallback overrides when session changes', async () => {
    const config = new Config({
      ...baseParams,
      sessionId: 'session-one',
    });
    await config.initialize();

    config.activateFallbackMode('fallback-model', 'failed-model');
    expect(config.getFallbackOverride('failed-model')).toBe('fallback-model');

    config.setSessionId('session-two');

    expect(config.getFallbackOverride('failed-model')).toBeUndefined();
  });

  it('does not throw when changing sessions before the previous plans dir exists', async () => {
    const config = new Config({
      ...baseParams,
      sessionId: 'session-one',
      plan: true,
    });

    await config.initialize();
    const missingPlansDir = config.storage.getProjectTempPlansDir();
    const realpathMock = vi.mocked(fs.realpathSync);
    const originalImplementation = realpathMock.getMockImplementation();

    try {
      realpathMock.mockImplementation((input) => {
        const normalizedInput =
          typeof input === 'string' || Buffer.isBuffer(input)
            ? input
            : input.toString();

        if (normalizedInput === missingPlansDir) {
          const error = new Error(
            `ENOENT: no such file or directory, ${normalizedInput}`,
          );
          Object.assign(error, { code: 'ENOENT' });
          throw error;
        }
        if (originalImplementation) {
          return originalImplementation(input);
        }
        return normalizedInput;
      });

      expect(() => config.setSessionId('session-two')).not.toThrow();
    } finally {
      realpathMock.mockImplementation((input) => {
        if (originalImplementation) {
          return originalImplementation(input);
        }
        return typeof input === 'string' || Buffer.isBuffer(input)
          ? input
          : input.toString();
      });
    }
  });

  it('clears the approved plan when starting a new session', () => {
    const config = new Config({
      ...baseParams,
      sessionId: 'session-one',
    });

    config.setApprovedPlanPath('/tmp/session-one/plans/approved.md');

    expect(() => config.resetNewSessionState('session-two')).not.toThrow();

    expect(config.getSessionId()).toBe('session-two');
    expect(config.getApprovedPlanPath()).toBeUndefined();
  });

  it('performs a comprehensive reset of all session-scoped state when sessionId changes', async () => {
    const config = new Config({
      ...baseParams,
      sessionId: 'session-one',
      plan: true,
      tracker: true,
    });

    await config.initialize();

    // 1. "Dirty" the session state
    const oldTrackerService = config.getTrackerService();
    config.setApprovedPlanPath('/tmp/plan.md');
    config.topicState.setTopic('Old Topic', 'Old Intent');
    config.getSkillManager().activateSkill('old-skill');
    config.getModelAvailabilityService().markTerminal('model-1', 'quota');
    config.setLatestApiRequest({} as never);

    // Interface to access private fields without 'any'
    interface PrivateConfig {
      modelQuotas: Map<string, unknown>;
      lastEmittedQuotaRemaining: number | undefined;
      lastEmittedQuotaLimit: number | undefined;
      lastQuotaFetchTime: number;
      hasAccessToPreviewModel: boolean | null;
    }
    const configInternal = config as unknown as PrivateConfig;

    // Mock internal quota state
    configInternal.modelQuotas.set('model-1', { remaining: 0, limit: 100 });
    configInternal.lastEmittedQuotaRemaining = 0;
    configInternal.lastEmittedQuotaLimit = 100;
    configInternal.lastQuotaFetchTime = 12345;
    configInternal.hasAccessToPreviewModel = true;

    // Listen for quota event
    const emitQuotaSpy = vi.spyOn(coreEvents, 'emitQuotaChanged');

    // 2. Trigger session change
    config.setSessionId('session-two');

    // 3. Verify EVERYTHING is reset
    expect(config.getSessionId()).toBe('session-two');
    expect(config.getApprovedPlanPath()).toBeUndefined();
    expect(config.topicState.getTopic()).toBeUndefined();
    expect(config.topicState.getIntent()).toBeUndefined();
    expect(config.getSkillManager().isSkillActive('old-skill')).toBe(false);
    expect(config.getTrackerService()).not.toBe(oldTrackerService);
    expect(
      config.getModelAvailabilityService().snapshot('model-1').available,
    ).toBe(true);
    expect(config.getLatestApiRequest()).toBeUndefined();

    // Quota resets
    expect(configInternal.modelQuotas.size).toBe(0);
    expect(configInternal.lastEmittedQuotaRemaining).toBeUndefined();
    expect(configInternal.lastEmittedQuotaLimit).toBeUndefined();
    expect(configInternal.lastQuotaFetchTime).toBe(0);

    // Event emission
    expect(emitQuotaSpy).toHaveBeenCalledWith(undefined, undefined, undefined);
  });
});

describe('GemmaModelRouterSettings', () => {
  const MODEL = DEFAULT_GEMINI_MODEL;
  const SANDBOX: SandboxConfig = createMockSandboxConfig({
    command: 'docker',
    image: 'gemini-cli-sandbox',
  });
  const TARGET_DIR = '/path/to/target';
  const DEBUG_MODE = false;
  const QUESTION = 'test question';
  const USER_MEMORY = 'Test User Memory';
  const TELEMETRY_SETTINGS = { enabled: false };
  const EMBEDDING_MODEL = 'gemini-embedding';
  const SESSION_ID = 'test-session-id';
  const baseParams: ConfigParameters = {
    cwd: '/tmp',
    embeddingModel: EMBEDDING_MODEL,
    sandbox: SANDBOX,
    targetDir: TARGET_DIR,
    debugMode: DEBUG_MODE,
    question: QUESTION,
    userMemory: USER_MEMORY,
    telemetry: TELEMETRY_SETTINGS,
    sessionId: SESSION_ID,
    model: MODEL,
    usageStatisticsEnabled: false,
  };

  it('should default gemmaModelRouter.enabled to false', () => {
    const config = new Config(baseParams);
    expect(config.getGemmaModelRouterEnabled()).toBe(false);
  });

  it('should return default gemma model router settings when not provided', () => {
    const config = new Config(baseParams);
    const settings = config.getGemmaModelRouterSettings();
    expect(settings.enabled).toBe(false);
    expect(settings.autoStartServer).toBe(true);
    expect(settings.binaryPath).toBe('');
    expect(settings.classifier?.host).toBe('http://localhost:9379');
    expect(settings.classifier?.model).toBe('gemma3-1b-gpu-custom');
  });

  it('should override default gemma model router settings when provided', () => {
    const params: ConfigParameters = {
      ...baseParams,
      gemmaModelRouter: {
        enabled: true,
        autoStartServer: false,
        binaryPath: '/custom/lit',
        classifier: {
          host: 'http://custom:1234',
          model: 'custom-gemma',
        },
      },
    };
    const config = new Config(params);
    const settings = config.getGemmaModelRouterSettings();
    expect(settings.enabled).toBe(true);
    expect(settings.autoStartServer).toBe(false);
    expect(settings.binaryPath).toBe('/custom/lit');
    expect(settings.classifier?.host).toBe('http://custom:1234');
    expect(settings.classifier?.model).toBe('custom-gemma');
  });

  it('should merge partial gemma model router settings with defaults', () => {
    const params: ConfigParameters = {
      ...baseParams,
      gemmaModelRouter: {
        enabled: true,
      },
    };
    const config = new Config(params);
    const settings = config.getGemmaModelRouterSettings();
    expect(settings.enabled).toBe(true);
    expect(settings.autoStartServer).toBe(true);
    expect(settings.binaryPath).toBe('');
    expect(settings.classifier?.host).toBe('http://localhost:9379');
    expect(settings.classifier?.model).toBe('gemma3-1b-gpu-custom');
  });
});

describe('setApprovalMode with folder trust', () => {
  const baseParams: ConfigParameters = {
    sessionId: 'test',
    targetDir: '.',
    debugMode: false,
    model: 'test-model',
    cwd: '.',
  };

  it('should throw an error when setting YOLO mode in an untrusted folder', () => {
    const config = new Config(baseParams);
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(false);
    expect(() => config.setApprovalMode(ApprovalMode.YOLO)).toThrow(
      'Cannot enable privileged approval modes in an untrusted folder.',
    );
  });

  it('should throw an error when setting AUTO_EDIT mode in an untrusted folder', () => {
    const config = new Config(baseParams);
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(false);
    expect(() => config.setApprovalMode(ApprovalMode.AUTO_EDIT)).toThrow(
      'Cannot enable privileged approval modes in an untrusted folder.',
    );
  });

  it('should NOT throw an error when setting DEFAULT mode in an untrusted folder', () => {
    const config = new Config(baseParams);
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(false);
    expect(() => config.setApprovalMode(ApprovalMode.DEFAULT)).not.toThrow();
  });

  it('should NOT throw an error when setting PLAN mode in an untrusted folder', () => {
    const config = new Config(baseParams);
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(false);
    expect(() => config.setApprovalMode(ApprovalMode.PLAN)).not.toThrow();
  });

  it('should NOT throw an error when setting any mode in a trusted folder', () => {
    const config = new Config(baseParams);
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(true);
    expect(() => config.setApprovalMode(ApprovalMode.YOLO)).not.toThrow();
    expect(() => config.setApprovalMode(ApprovalMode.AUTO_EDIT)).not.toThrow();
    expect(() => config.setApprovalMode(ApprovalMode.DEFAULT)).not.toThrow();
  });

  it('should NOT throw an error when setting any mode if trustedFolder is undefined', () => {
    const config = new Config(baseParams);
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(true); // isTrustedFolder defaults to true
    expect(() => config.setApprovalMode(ApprovalMode.YOLO)).not.toThrow();
    expect(() => config.setApprovalMode(ApprovalMode.AUTO_EDIT)).not.toThrow();
    expect(() => config.setApprovalMode(ApprovalMode.DEFAULT)).not.toThrow();
  });

  it('should update system instruction when entering Plan mode', () => {
    const config = new Config(baseParams);
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(true);
    vi.spyOn(config, 'getToolRegistry').mockReturnValue({
      getTool: vi.fn().mockReturnValue(undefined),
      unregisterTool: vi.fn(),
      registerTool: vi.fn(),
    } as Partial<ToolRegistry> as ToolRegistry);
    const updateSpy = vi.spyOn(config, 'updateSystemInstructionIfInitialized');

    config.setApprovalMode(ApprovalMode.PLAN);

    expect(updateSpy).toHaveBeenCalled();
  });

  it('should update system instruction when leaving Plan mode', () => {
    const config = new Config({
      ...baseParams,
      approvalMode: ApprovalMode.PLAN,
    });
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(true);
    vi.spyOn(config, 'getToolRegistry').mockReturnValue({
      getTool: vi.fn().mockReturnValue(undefined),
      unregisterTool: vi.fn(),
      registerTool: vi.fn(),
    } as Partial<ToolRegistry> as ToolRegistry);
    const updateSpy = vi.spyOn(config, 'updateSystemInstructionIfInitialized');

    config.setApprovalMode(ApprovalMode.DEFAULT);

    expect(updateSpy).toHaveBeenCalled();
  });

  it('should update system instruction when entering YOLO mode', () => {
    const config = new Config(baseParams);
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(true);
    vi.spyOn(config, 'getToolRegistry').mockReturnValue({
      getTool: vi.fn().mockReturnValue(undefined),
      unregisterTool: vi.fn(),
      registerTool: vi.fn(),
    } as Partial<ToolRegistry> as ToolRegistry);
    const updateSpy = vi.spyOn(config, 'updateSystemInstructionIfInitialized');

    config.setApprovalMode(ApprovalMode.YOLO);

    expect(updateSpy).toHaveBeenCalled();
  });

  it('should not update system instruction when switching between non-Plan/non-YOLO modes', () => {
    const config = new Config(baseParams);
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(true);
    const updateSpy = vi.spyOn(config, 'updateSystemInstructionIfInitialized');

    config.setApprovalMode(ApprovalMode.AUTO_EDIT);

    expect(updateSpy).not.toHaveBeenCalled();
  });

  describe('approval mode duration logging', () => {
    beforeEach(() => {
      vi.mocked(logApprovalModeDuration).mockClear();
    });

    it('should initialize lastModeSwitchTime with performance.now() and log positive duration', () => {
      const startTime = 1000;
      const endTime = 5000;
      const performanceSpy = vi.spyOn(performance, 'now');

      performanceSpy.mockReturnValueOnce(startTime);
      const config = new Config(baseParams);
      vi.spyOn(config, 'isTrustedFolder').mockReturnValue(true);

      performanceSpy.mockReturnValueOnce(endTime);
      config.setApprovalMode(ApprovalMode.PLAN);

      expect(logApprovalModeDuration).toHaveBeenCalledWith(
        config,
        expect.objectContaining({
          mode: ApprovalMode.DEFAULT,
          duration_ms: endTime - startTime,
        }),
      );
      performanceSpy.mockRestore();
    });

    it('should skip logging if duration is zero or negative', () => {
      const startTime = 5000;
      const endTime = 4000;
      const performanceSpy = vi.spyOn(performance, 'now');

      performanceSpy.mockReturnValueOnce(startTime);
      const config = new Config(baseParams);
      vi.spyOn(config, 'isTrustedFolder').mockReturnValue(true);

      performanceSpy.mockReturnValueOnce(endTime);
      config.setApprovalMode(ApprovalMode.PLAN);

      expect(logApprovalModeDuration).not.toHaveBeenCalled();
      performanceSpy.mockRestore();
    });

    it('should update lastModeSwitchTime after logging to prevent double counting', () => {
      const time1 = 1000;
      const time2 = 3000;
      const time3 = 6000;
      const performanceSpy = vi.spyOn(performance, 'now');

      performanceSpy.mockReturnValueOnce(time1);
      const config = new Config(baseParams);
      vi.spyOn(config, 'isTrustedFolder').mockReturnValue(true);

      performanceSpy.mockReturnValueOnce(time2);
      config.setApprovalMode(ApprovalMode.PLAN);
      expect(logApprovalModeDuration).toHaveBeenCalledWith(
        config,
        expect.objectContaining({
          mode: ApprovalMode.DEFAULT,
          duration_ms: time2 - time1,
        }),
      );

      vi.mocked(logApprovalModeDuration).mockClear();

      performanceSpy.mockReturnValueOnce(time3);
      config.setApprovalMode(ApprovalMode.YOLO);
      expect(logApprovalModeDuration).toHaveBeenCalledWith(
        config,
        expect.objectContaining({
          mode: ApprovalMode.PLAN,
          duration_ms: time3 - time2,
        }),
      );
      performanceSpy.mockRestore();
    });
  });

  describe('registerCoreTools', () => {
    beforeEach(() => {
      vi.clearAllMocks();
    });

    it('should register RipGrepTool when useRipgrep is true and it is available', async () => {
      vi.mocked(resolveRipgrepPath).mockResolvedValue('/mock/rg');
      const config = new Config({ ...baseParams, useRipgrep: true });
      await config.initialize();

      const calls = vi.mocked(ToolRegistry.prototype.registerTool).mock.calls;
      const wasRipGrepRegistered = calls.some(
        (call) => call[0] instanceof vi.mocked(RipGrepTool),
      );
      const wasGrepRegistered = calls.some(
        (call) => call[0] instanceof vi.mocked(GrepTool),
      );

      expect(wasRipGrepRegistered).toBe(true);
      expect(wasGrepRegistered).toBe(false);
      expect(logRipgrepFallback).not.toHaveBeenCalled();
    });

    it('should register GrepTool as a fallback when useRipgrep is true but it is not available', async () => {
      vi.mocked(resolveRipgrepPath).mockResolvedValue(null);
      const config = new Config({ ...baseParams, useRipgrep: true });
      await config.initialize();

      const calls = vi.mocked(ToolRegistry.prototype.registerTool).mock.calls;
      const wasRipGrepRegistered = calls.some(
        (call) => call[0] instanceof vi.mocked(RipGrepTool),
      );
      const wasGrepRegistered = calls.some(
        (call) => call[0] instanceof vi.mocked(GrepTool),
      );

      expect(wasRipGrepRegistered).toBe(false);
      expect(wasGrepRegistered).toBe(true);
      expect(logRipgrepFallback).toHaveBeenCalledWith(
        config,
        expect.any(RipgrepFallbackEvent),
      );
      const event = vi.mocked(logRipgrepFallback).mock.calls[0][1];
      expect(event.error).toBeUndefined();
    });

    it('should register GrepTool as a fallback when canUseRipgrep throws an error', async () => {
      const error = new Error('ripGrep check failed');
      vi.mocked(resolveRipgrepPath).mockRejectedValue(error);
      const config = new Config({ ...baseParams, useRipgrep: true });
      await config.initialize();

      const calls = vi.mocked(ToolRegistry.prototype.registerTool).mock.calls;
      const wasRipGrepRegistered = calls.some(
        (call) => call[0] instanceof vi.mocked(RipGrepTool),
      );
      const wasGrepRegistered = calls.some(
        (call) => call[0] instanceof vi.mocked(GrepTool),
      );

      expect(wasRipGrepRegistered).toBe(false);
      expect(wasGrepRegistered).toBe(true);
      expect(logRipgrepFallback).toHaveBeenCalledWith(
        config,
        expect.any(RipgrepFallbackEvent),
      );
      const event = vi.mocked(logRipgrepFallback).mock.calls[0][1];
      expect(event.error).toBe(String(error));
    });

    it('should register GrepTool when useRipgrep is false', async () => {
      const config = new Config({ ...baseParams, useRipgrep: false });
      await config.initialize();

      const calls = vi.mocked(ToolRegistry.prototype.registerTool).mock.calls;
      const wasRipGrepRegistered = calls.some(
        (call) => call[0] instanceof vi.mocked(RipGrepTool),
      );
      const wasGrepRegistered = calls.some(
        (call) => call[0] instanceof vi.mocked(GrepTool),
      );

      expect(wasRipGrepRegistered).toBe(false);
      expect(wasGrepRegistered).toBe(true);
      expect(resolveRipgrepPath).not.toHaveBeenCalled();
      expect(logRipgrepFallback).not.toHaveBeenCalled();
    });
  });
});

describe('isYoloModeDisabled', () => {
  const baseParams: ConfigParameters = {
    sessionId: 'test',
    targetDir: '.',
    debugMode: false,
    model: 'test-model',
    cwd: '.',
  };

  it('should return false when yolo mode is not disabled and folder is trusted', () => {
    const config = new Config(baseParams);
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(true);
    expect(config.isYoloModeDisabled()).toBe(false);
  });

  it('should return true when yolo mode is disabled by parameter', () => {
    const config = new Config({ ...baseParams, disableYoloMode: true });
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(true);
    expect(config.isYoloModeDisabled()).toBe(true);
  });

  it('should return true when folder is untrusted', () => {
    const config = new Config(baseParams);
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(false);
    expect(config.isYoloModeDisabled()).toBe(true);
  });

  it('should return true when yolo is disabled and folder is untrusted', () => {
    const config = new Config({ ...baseParams, disableYoloMode: true });
    vi.spyOn(config, 'isTrustedFolder').mockReturnValue(false);
    expect(config.isYoloModeDisabled()).toBe(true);
  });
});

describe('BaseLlmClient Lifecycle', () => {
  const MODEL = 'gemini-pro';
  const SANDBOX: SandboxConfig = createMockSandboxConfig({
    command: 'docker',
    image: 'gemini-cli-sandbox',
  });
  const TARGET_DIR = '/path/to/target';
  const DEBUG_MODE = false;
  const QUESTION = 'test question';
  const USER_MEMORY = 'Test User Memory';
  const TELEMETRY_SETTINGS = { enabled: false };
  const EMBEDDING_MODEL = 'gemini-embedding';
  const SESSION_ID = 'test-session-id';
  const baseParams: ConfigParameters = {
    cwd: '/tmp',
    embeddingModel: EMBEDDING_MODEL,
    sandbox: SANDBOX,
    targetDir: TARGET_DIR,
    debugMode: DEBUG_MODE,
    question: QUESTION,
    userMemory: USER_MEMORY,
    telemetry: TELEMETRY_SETTINGS,
    sessionId: SESSION_ID,
    model: MODEL,
    usageStatisticsEnabled: false,
  };

  it('should throw an error if getBaseLlmClient is called before experiments have been fetched', () => {
    const config = new Config(baseParams);
    // By default on a new Config instance, experiments are undefined
    expect(() => config.getBaseLlmClient()).toThrow(
      'BaseLlmClient not initialized. Ensure experiments have been fetched and configuration is ready.',
    );
  });

  it('should throw an error if getBaseLlmClient is called before refreshAuth', () => {
    const config = new Config(baseParams);
    // Explicitly set experiments to avoid triggering the new missing-experiments error
    config.setExperiments({ flags: {}, experimentIds: [] });
    expect(() => config.getBaseLlmClient()).toThrow(
      'BaseLlmClient not initialized. Ensure authentication has occurred and ContentGenerator is ready.',
    );
  });

  it('should successfully initialize BaseLlmClient after refreshAuth is called', async () => {
    const config = new Config(baseParams);
    const authType = AuthType.USE_GEMINI;
    const mockContentConfig = { model: 'gemini-flash', apiKey: 'test-key' };

    vi.mocked(createContentGeneratorConfig).mockResolvedValue(
      mockContentConfig,
    );

    await config.refreshAuth(authType);

    // Should not throw
    const llmService = config.getBaseLlmClient();
    expect(llmService).toBeDefined();
    expect(BaseLlmClient).toHaveBeenCalledWith(
      config.getContentGenerator(),
      config,
    );
  });
});

describe('Generation Config Merging (HACK)', () => {
  const MODEL = 'gemini-pro';
  const SANDBOX: SandboxConfig = createMockSandboxConfig({
    command: 'docker',
    image: 'gemini-cli-sandbox',
  });
  const TARGET_DIR = '/path/to/target';
  const DEBUG_MODE = false;
  const QUESTION = 'test question';
  const USER_MEMORY = 'Test User Memory';
  const TELEMETRY_SETTINGS = { enabled: false };
  const EMBEDDING_MODEL = 'gemini-embedding';
  const SESSION_ID = 'test-session-id';
  const baseParams: ConfigParameters = {
    cwd: '/tmp',
    embeddingModel: EMBEDDING_MODEL,
    sandbox: SANDBOX,
    targetDir: TARGET_DIR,
    debugMode: DEBUG_MODE,
    question: QUESTION,
    userMemory: USER_MEMORY,
    telemetry: TELEMETRY_SETTINGS,
    sessionId: SESSION_ID,
    model: MODEL,
    usageStatisticsEnabled: false,
  };

  it('should merge default aliases when user provides only overrides', () => {
    const userOverrides = [
      {
        match: { model: 'test-model' },
        modelConfig: { generateContentConfig: { temperature: 0.1 } },
      },
    ];

    const params: ConfigParameters = {
      ...baseParams,
      modelConfigServiceConfig: {
        overrides: userOverrides,
      },
    };

    const config = new Config(params);
    const serviceConfig = (
      config.modelConfigService as Partial<ModelConfigService> as {
        config: ModelConfigServiceConfig;
      }
    ).config;

    // Assert that the default aliases are present
    expect(serviceConfig.aliases).toEqual(DEFAULT_MODEL_CONFIGS.aliases);
    // Assert that the user's overrides are present
    expect(serviceConfig.overrides).toEqual(userOverrides);
  });

  it('should merge default overrides when user provides only aliases', () => {
    const userAliases = {
      'my-alias': {
        modelConfig: { model: 'my-model' },
      },
    };

    const params: ConfigParameters = {
      ...baseParams,
      modelConfigServiceConfig: {
        aliases: userAliases,
      },
    };

    const config = new Config(params);
    const serviceConfig = (
      config.modelConfigService as Partial<ModelConfigService> as {
        config: ModelConfigServiceConfig;
      }
    ).config;

    // Assert that the user's aliases are present
    expect(serviceConfig.aliases).toEqual(userAliases);
    // Assert that the default overrides are present
    expect(serviceConfig.overrides).toEqual(DEFAULT_MODEL_CONFIGS.overrides);
  });

  it('should use user-provided aliases if they exist', () => {
    const userAliases = {
      'my-alias': {
        modelConfig: { model: 'my-model' },
      },
    };

    const params: ConfigParameters = {
      ...baseParams,
      modelConfigServiceConfig: {
        aliases: userAliases,
      },
    };

    const config = new Config(params);
    const serviceConfig = (
      config.modelConfigService as Partial<ModelConfigService> as {
        config: ModelConfigServiceConfig;
      }
    ).config;

    // Assert that the user's aliases are used, not the defaults
    expect(serviceConfig.aliases).toEqual(userAliases);
  });

  it('should use default generation config if none is provided', () => {
    const params: ConfigParameters = { ...baseParams };

    const config = new Config(params);
    const serviceConfig = (
      config.modelConfigService as Partial<ModelConfigService> as {
        config: ModelConfigServiceConfig;
      }
    ).config;

    // Assert that the full default config is used
    expect(serviceConfig).toEqual(DEFAULT_MODEL_CONFIGS);
  });
});

describe('Config getHooks', () => {
  const baseParams: ConfigParameters = {
    cwd: '/tmp',
    targetDir: '/path/to/target',
    debugMode: false,
    sessionId: 'test-session-id',
    model: 'gemini-pro',
    usageStatisticsEnabled: false,
  };

  it('should return undefined when no hooks are provided', () => {
    const config = new Config(baseParams);
    expect(config.getHooks()).toBeUndefined();
  });

  it('should return empty object when empty hooks are provided', () => {
    const configWithEmptyHooks = new Config({
      ...baseParams,
      hooks: {},
    });
    expect(configWithEmptyHooks.getHooks()).toEqual({});
  });

  it('should return the hooks configuration when provided', () => {
    const mockHooks = {
      BeforeTool: [
        {
          hooks: [{ type: HookType.Command, command: 'echo 1' } as const],
        },
      ],
    };
    const config = new Config({ ...baseParams, hooks: mockHooks });
    const retrievedHooks = config.getHooks();
    expect(retrievedHooks).toEqual(mockHooks);
  });

  it('should return hooks with all supported event types', () => {
    const allEventHooks: { [K in HookEventName]?: HookDefinition[] } = {
      [HookEventName.BeforeAgent]: [
        { hooks: [{ type: HookType.Command, command: 'test1' }] },
      ],
      [HookEventName.AfterAgent]: [
        { hooks: [{ type: HookType.Command, command: 'test2' }] },
      ],
      [HookEventName.BeforeTool]: [
        { hooks: [{ type: HookType.Command, command: 'test3' }] },
      ],
      [HookEventName.AfterTool]: [
        { hooks: [{ type: HookType.Command, command: 'test4' }] },
      ],
      [HookEventName.BeforeModel]: [
        { hooks: [{ type: HookType.Command, command: 'test5' }] },
      ],
      [HookEventName.AfterModel]: [
        { hooks: [{ type: HookType.Command, command: 'test6' }] },
      ],
      [HookEventName.BeforeToolSelection]: [
        { hooks: [{ type: HookType.Command, command: 'test7' }] },
      ],
      [HookEventName.Notification]: [
        { hooks: [{ type: HookType.Command, command: 'test8' }] },
      ],
      [HookEventName.SessionStart]: [
        { hooks: [{ type: HookType.Command, command: 'test9' }] },
      ],
      [HookEventName.SessionEnd]: [
        { hooks: [{ type: HookType.Command, command: 'test10' }] },
      ],
      [HookEventName.PreCompress]: [
        { hooks: [{ type: HookType.Command, command: 'test11' }] },
      ],
    };

    const config = new Config({
      ...baseParams,
      hooks: allEventHooks,
    });

    const retrievedHooks = config.getHooks();
    expect(retrievedHooks).toEqual(allEventHooks);
    expect(Object.keys(retrievedHooks!)).toHaveLength(11); // All hook event types
  });

  describe('setModel', () => {
    it('should allow setting a pro (any) model and reset availability', () => {
      const config = new Config(baseParams);
      const service = config.getModelAvailabilityService();
      const spy = vi.spyOn(service, 'reset');

      const proModel = 'gemini-2.5-pro';
      config.setModel(proModel);

      expect(config.getModel()).toBe(proModel);
      expect(mockCoreEvents.emitModelChanged).toHaveBeenCalledWith(proModel);
      expect(spy).toHaveBeenCalled();
    });

    it('should allow setting auto model from non-auto model and reset availability', () => {
      const config = new Config(baseParams);
      const service = config.getModelAvailabilityService();
      const spy = vi.spyOn(service, 'reset');

      config.setModel('auto');

      expect(config.getModel()).toBe('auto');
      expect(mockCoreEvents.emitModelChanged).toHaveBeenCalledWith('auto');
      expect(spy).toHaveBeenCalled();
    });

    it('should preserve fallback overrides when setting a new model', () => {
      const config = new Config(baseParams);
      config.activateFallbackMode('fallback-model', 'failed-model');
      expect(config.getFallbackOverride('failed-model')).toBe('fallback-model');

      config.setModel('new-model');

      expect(config.getFallbackOverride('failed-model')).toBe('fallback-model');
    });

    it('should allow setting auto model from auto model and reset availability', () => {
      const config = new Config({
        cwd: '/tmp',
        targetDir: '/path/to/target',
        debugMode: false,
        sessionId: 'test-session-id',
        model: 'auto',
        usageStatisticsEnabled: false,
      });
      const service = config.getModelAvailabilityService();
      const spy = vi.spyOn(service, 'reset');

      config.setModel('auto');

      expect(config.getModel()).toBe('auto');
      expect(spy).toHaveBeenCalled();
    });

    it('should reset active model when setModel is called with the current model after a fallback', () => {
      const config = new Config(baseParams);
      const originalModel = config.getModel();
      const fallbackModel = 'fallback-model';

      config.setActiveModel(fallbackModel);
      expect(config.getActiveModel()).toBe(fallbackModel);

      config.setModel(originalModel);

      expect(config.getModel()).toBe(originalModel);
      expect(config.getActiveModel()).toBe(originalModel);
    });

    it('should call onModelChange when a new model is set and should persist', () => {
      const onModelChange = vi.fn();
      const config = new Config({
        ...baseParams,
        onModelChange,
      });

      config.setModel(DEFAULT_GEMINI_MODEL, false);

      expect(onModelChange).toHaveBeenCalledWith(DEFAULT_GEMINI_MODEL);
    });

    it('should NOT call onModelChange when a new model is temporary', () => {
      const onModelChange = vi.fn();
      const config = new Config({
        ...baseParams,
        onModelChange,
      });

      config.setModel(DEFAULT_GEMINI_MODEL, true);

      expect(onModelChange).not.toHaveBeenCalled();
    });

    it('should call onModelChange when persisting a model that was previously temporary', () => {
      const onModelChange = vi.fn();
      const config = new Config({
        ...baseParams,
        model: 'some-other-model',
        onModelChange,
      });

      // Temporary selection
      config.setModel(DEFAULT_GEMINI_MODEL, true);
      expect(onModelChange).not.toHaveBeenCalled();

      // Persist selection of the same model
      config.setModel(DEFAULT_GEMINI_MODEL, false);
      expect(onModelChange).toHaveBeenCalledWith(DEFAULT_GEMINI_MODEL);
    });
  });
});

describe('LocalLiteRtLmClient Lifecycle', () => {
  const MODEL = 'gemini-pro';
  const SANDBOX: SandboxConfig = createMockSandboxConfig({
    command: 'docker',
    image: 'gemini-cli-sandbox',
  });
  const TARGET_DIR = '/path/to/target';
  const DEBUG_MODE = false;
  const QUESTION = 'test question';
  const USER_MEMORY = 'Test User Memory';
  const TELEMETRY_SETTINGS = { enabled: false };
  const EMBEDDING_MODEL = 'gemini-embedding';
  const SESSION_ID = 'test-session-id';
  const baseParams: ConfigParameters = {
    cwd: '/tmp',
    embeddingModel: EMBEDDING_MODEL,
    sandbox: SANDBOX,
    targetDir: TARGET_DIR,
    debugMode: DEBUG_MODE,
    question: QUESTION,
    userMemory: USER_MEMORY,
    telemetry: TELEMETRY_SETTINGS,
    sessionId: SESSION_ID,
    model: MODEL,
    usageStatisticsEnabled: false,
  };

  beforeEach(() => {
    vi.clearAllMocks();
    vi.mocked(getExperiments).mockResolvedValue({
      experimentIds: [],
      flags: {},
    });
  });

  it('should successfully initialize LocalLiteRtLmClient on first call and reuse it', () => {
    const config = new Config(baseParams);
    const client1 = config.getLocalLiteRtLmClient();
    const client2 = config.getLocalLiteRtLmClient();

    expect(client1).toBeDefined();
    expect(client1).toBe(client2); // Should return the same instance
  });

  it('should configure LocalLiteRtLmClient with settings from getGemmaModelRouterSettings', () => {
    const customHost = 'http://my-custom-host:9999';
    const customModel = 'my-custom-gemma-model';
    const params: ConfigParameters = {
      ...baseParams,
      gemmaModelRouter: {
        enabled: true,
        classifier: {
          host: customHost,
          model: customModel,
        },
      },
    };

    const config = new Config(params);
    config.getLocalLiteRtLmClient();

    expect(LocalLiteRtLmClient).toHaveBeenCalledWith(config);
  });
});

describe('Config getExperiments', () => {
  const baseParams: ConfigParameters = {
    cwd: '/tmp',
    targetDir: '/path/to/target',
    debugMode: false,
    sessionId: 'test-session-id',
    model: 'gemini-pro',
    usageStatisticsEnabled: false,
  };

  it('should return undefined when no experiments are provided', () => {
    const config = new Config(baseParams);
    expect(config.getExperiments()).toBeUndefined();
  });

  it('should return empty object when empty experiments are provided', () => {
    const configWithEmptyExps = new Config({
      ...baseParams,
      experiments: { flags: {}, experimentIds: [] },
    });
    expect(configWithEmptyExps.getExperiments()).toEqual({
      flags: {},
      experimentIds: [],
    });
  });

  it('should return the experiments configuration when provided', () => {
    const mockExps = {
      flags: {
        testFlag: { boolValue: true },
      },
      experimentIds: [],
    };

    const config = new Config({
      ...baseParams,
      experiments: mockExps,
    });

    const retrievedExps = config.getExperiments();
    expect(retrievedExps).toEqual(mockExps);
    expect(retrievedExps).toBe(mockExps); // Should return the same reference
  });
});

describe('Config setExperiments logging', () => {
  const baseParams: ConfigParameters = {
    cwd: '/tmp',
    targetDir: '/path/to/target',
    debugMode: false,
    sessionId: 'test-session-id',
    model: 'gemini-pro',
    usageStatisticsEnabled: false,
  };

  it('logs a sorted, non-truncated summary of experiments when they are set', () => {
    const config = new Config(baseParams);
    const debugSpy = vi
      .spyOn(debugLogger, 'debug')
      .mockImplementation(() => {});
    const experiments = {
      flags: {
        ZetaFlag: {
          boolValue: true,
          stringValue: 'zeta',
          int32ListValue: { values: [1, 2] },
        },
        AlphaFlag: {
          boolValue: false,
          stringValue: 'alpha',
          stringListValue: { values: ['a', 'b', 'c'] },
        },
        MiddleFlag: {
          // Intentionally sparse to ensure undefined values are omitted
          floatValue: 0.42,
          int32ListValue: { values: [] },
        },
      },
      experimentIds: [101, 99],
    };

    config.setExperiments(experiments);

    const logCall = debugSpy.mock.calls.find(
      ([message]) => message === 'Experiments loaded',
    );
    expect(logCall).toBeDefined();
    const loggedSummary = logCall?.[1] as string;
    expect(typeof loggedSummary).toBe('string');
    expect(loggedSummary).toContain('experimentIds');
    expect(loggedSummary).toContain('101');
    expect(loggedSummary).toContain('AlphaFlag');
    expect(loggedSummary).toContain('ZetaFlag');
    const alphaIndex = loggedSummary.indexOf('AlphaFlag');
    const zetaIndex = loggedSummary.indexOf('ZetaFlag');
    expect(alphaIndex).toBeGreaterThan(-1);
    expect(zetaIndex).toBeGreaterThan(-1);
    expect(alphaIndex).toBeLessThan(zetaIndex);
    expect(loggedSummary).toContain('\n');
    expect(loggedSummary).not.toContain('stringListLength: 0');
    expect(loggedSummary).not.toContain('int32ListLength: 0');

    debugSpy.mockRestore();
  });
});

describe('Availability Service Integration', () => {
  const baseModel = 'test-model';
  const baseParams: ConfigParameters = {
    sessionId: 'test',
    targetDir: '.',
    debugMode: false,
    model: baseModel,
    cwd: '.',
  };

  it('setActiveModel updates active model', async () => {
    const config = new Config(baseParams);
    const model1 = 'model1';
    const model2 = 'model2';

    config.setActiveModel(model1);
    expect(config.getActiveModel()).toBe(model1);

    config.setActiveModel(model2);
    expect(config.getActiveModel()).toBe(model2);
  });

  it('getActiveModel defaults to configured model if not set', () => {
    const config = new Config(baseParams);
    expect(config.getActiveModel()).toBe(baseModel);
  });

  it('resetTurn delegates to availability service', () => {
    const config = new Config(baseParams);
    const service = config.getModelAvailabilityService();
    const spy = vi.spyOn(service, 'resetTurn');

    config.resetTurn();
    expect(spy).toHaveBeenCalled();
  });

  it('resetTurn does NOT reset billing state', () => {
    const config = new Config({
      ...baseParams,
      billing: { overageStrategy: 'ask' },
    });

    // Simulate accepting credits mid-turn
    config.setOverageStrategy('always');
    config.setCreditsNotificationShown(true);

    // resetTurn should leave billing state intact
    config.resetTurn();
    expect(config.getBillingSettings().overageStrategy).toBe('always');
    expect(config.getCreditsNotificationShown()).toBe(true);
  });

  it('resetBillingTurnState resets overageStrategy to configured value', () => {
    const config = new Config({
      ...baseParams,
      billing: { overageStrategy: 'ask' },
    });

    config.setOverageStrategy('always');
    expect(config.getBillingSettings().overageStrategy).toBe('always');

    config.resetBillingTurnState('ask');
    expect(config.getBillingSettings().overageStrategy).toBe('ask');
  });

  it('resetBillingTurnState preserves overageStrategy when configured as always', () => {
    const config = new Config({
      ...baseParams,
      billing: { overageStrategy: 'always' },
    });

    config.resetBillingTurnState('always');
    expect(config.getBillingSettings().overageStrategy).toBe('always');
  });

  it('resetBillingTurnState defaults to ask when no strategy provided', () => {
    const config = new Config({
      ...baseParams,
      billing: { overageStrategy: 'always' },
    });

    config.resetBillingTurnState();
    expect(config.getBillingSettings().overageStrategy).toBe('ask');
  });

  it('resetBillingTurnState resets creditsNotificationShown', () => {
    const config = new Config(baseParams);

    config.setCreditsNotificationShown(true);
    expect(config.getCreditsNotificationShown()).toBe(true);

    config.resetBillingTurnState();
    expect(config.getCreditsNotificationShown()).toBe(false);
  });
});

describe('Hooks configuration', () => {
  const baseParams: ConfigParameters = {
    sessionId: 'test',
    targetDir: '.',
    debugMode: false,
    model: 'test-model',
    cwd: '.',
    disabledHooks: ['initial-hook'],
  };

  it('updateDisabledHooks should update the disabled list', () => {
    const config = new Config(baseParams);
    expect(config.getDisabledHooks()).toEqual(['initial-hook']);

    const newDisabled = ['new-hook-1', 'new-hook-2'];
    config.updateDisabledHooks(newDisabled);

    expect(config.getDisabledHooks()).toEqual(['new-hook-1', 'new-hook-2']);
  });

  it('updateDisabledHooks should only update disabled list and not definitions', () => {
    const initialHooks = {
      BeforeAgent: [
        {
          hooks: [{ type: HookType.Command as const, command: 'initial' }],
        },
      ],
    };
    const config = new Config({ ...baseParams, hooks: initialHooks });

    config.updateDisabledHooks(['some-hook']);

    expect(config.getDisabledHooks()).toEqual(['some-hook']);
    expect(config.getHooks()).toEqual(initialHooks);
  });
});

describe('Config Quota & Preview Model Access', () => {
  let config: Config;
  let mockCodeAssistServer: {
    projectId: string;
    retrieveUserQuota: Mock;
  };

  const baseParams: ConfigParameters = {
    cwd: '/tmp',
    targetDir: '/tmp',
    debugMode: false,
    sessionId: 'test-session',
    model: 'gemini-pro',
    usageStatisticsEnabled: false,
    embeddingModel: 'gemini-embedding',
    sandbox: {
      enabled: true,
      allowedPaths: [],
      networkAccess: false,
      command: 'docker',
      image: 'gemini-cli-sandbox',
    },
  };

  beforeEach(() => {
    vi.clearAllMocks();
    mockCodeAssistServer = {
      projectId: 'test-project',
      retrieveUserQuota: vi.fn(),
    };
    vi.mocked(getCodeAssistServer).mockReturnValue(
      mockCodeAssistServer as Partial<CodeAssistServer> as CodeAssistServer,
    );
    config = new Config(baseParams);
  });

  describe('refreshUserQuota', () => {
    it('should update hasAccessToPreviewModel to true if quota includes preview model', async () => {
      mockCodeAssistServer.retrieveUserQuota.mockResolvedValue({
        buckets: [
          {
            modelId: 'gemini-3-pro-preview',
            remainingAmount: '100',
            remainingFraction: 1.0,
          },
        ],
      });

      await config.refreshUserQuota();
      expect(config.getHasAccessToPreviewModel()).toBe(true);
    });

    it('should update hasAccessToPreviewModel to true if quota includes Gemini 3.1 preview model', async () => {
      mockCodeAssistServer.retrieveUserQuota.mockResolvedValue({
        buckets: [
          {
            modelId: 'gemini-3.1-pro-preview',
            remainingAmount: '100',
            remainingFraction: 1.0,
          },
        ],
      });

      await config.refreshUserQuota();
      expect(config.getHasAccessToPreviewModel()).toBe(true);
    });

    it('should update hasAccessToPreviewModel to false if quota does not include preview model', async () => {
      mockCodeAssistServer.retrieveUserQuota.mockResolvedValue({
        buckets: [
          {
            modelId: 'some-other-model',
            remainingAmount: '10',
            remainingFraction: 0.1,
          },
        ],
      });

      await config.refreshUserQuota();
      expect(config.getHasAccessToPreviewModel()).toBe(false);
    });

    it('should calculate pooled quota correctly for auto models', async () => {
      mockCodeAssistServer.retrieveUserQuota.mockResolvedValue({
        buckets: [
          {
            modelId: 'gemini-2.5-pro',
            remainingAmount: '10',
            remainingFraction: 0.2,
          },
          {
            modelId: 'gemini-2.5-flash',
            remainingAmount: '80',
            remainingFraction: 0.8,
          },
        ],
      });

      config.setModel('auto-gemini-2.5');
      await config.refreshUserQuota();

      const pooled = (
        config as Partial<Config> as {
          getPooledQuota: () => {
            remaining?: number;
            limit?: number;
            resetTime?: string;
          };
        }
      ).getPooledQuota();
      // Pro: 10 / 0.2 = 50 total.
      // Flash: 80 / 0.8 = 100 total.
      // Pooled: (10 + 80) / (50 + 100) = 90 / 150 = 0.6
      expect(pooled?.remaining).toBe(90);
      expect(pooled?.limit).toBe(150);
      expect((pooled?.remaining ?? 0) / (pooled?.limit ?? 1)).toBeCloseTo(0.6);
    });

    it('should return undefined pooled quota for non-auto models', async () => {
      mockCodeAssistServer.retrieveUserQuota.mockResolvedValue({
        buckets: [
          {
            modelId: 'gemini-2.5-pro',
            remainingAmount: '10',
            remainingFraction: 0.2,
          },
        ],
      });

      config.setModel('gemini-2.5-pro');
      await config.refreshUserQuota();

      expect(
        (
          config as Partial<Config> as {
            getPooledQuota: () => {
              remaining?: number;
              limit?: number;
              resetTime?: string;
            };
          }
        ).getPooledQuota(),
      ).toEqual({});
    });

    it('should update hasAccessToPreviewModel to false if buckets are undefined', async () => {
      mockCodeAssistServer.retrieveUserQuota.mockResolvedValue({});

      await config.refreshUserQuota();
      expect(config.getHasAccessToPreviewModel()).toBe(false);
    });

    it('should return undefined and not update if codeAssistServer is missing', async () => {
      vi.mocked(getCodeAssistServer).mockReturnValue(undefined);
      const result = await config.refreshUserQuota();
      expect(result).toBeUndefined();
      // Never set => stays null (unknown); getter returns false by default
      expect(config.getHasAccessToPreviewModel()).toBe(false);
    });

    it('should return undefined if retrieveUserQuota fails', async () => {
      mockCodeAssistServer.retrieveUserQuota.mockRejectedValue(
        new Error('Network error'),
      );
      const result = await config.refreshUserQuota();
      expect(result).toBeUndefined();
      // Never set => stays null (unknown); getter returns false by default
      expect(config.getHasAccessToPreviewModel()).toBe(false);
    });
    it('should derive quota from remainingFraction when remainingAmount is missing', async () => {
      mockCodeAssistServer.retrieveUserQuota.mockResolvedValue({
        buckets: [
          {
            modelId: 'gemini-3-flash-preview',
            remainingFraction: 0.96,
          },
        ],
      });

      config.setModel('gemini-3-flash-preview');
      mockCoreEvents.emitQuotaChanged.mockClear();
      await config.refreshUserQuota();

      // Normalized: limit=100, remaining=96
      expect(mockCoreEvents.emitQuotaChanged).toHaveBeenCalledWith(
        96,
        100,
        undefined,
      );
      expect(config.getQuotaRemaining()).toBe(96);
      expect(config.getQuotaLimit()).toBe(100);
    });

    it('should store quota from remainingFraction when remainingFraction is 0', async () => {
      mockCodeAssistServer.retrieveUserQuota.mockResolvedValue({
        buckets: [
          {
            modelId: 'gemini-3-pro-preview',
            remainingFraction: 0,
          },
        ],
      });

      config.setModel('gemini-3-pro-preview');
      mockCoreEvents.emitQuotaChanged.mockClear();
      await config.refreshUserQuota();

      // remaining=0, limit=100 but limit>0 check still passes
      // however remaining=0 means 0% remaining = 100% used
      expect(config.getQuotaRemaining()).toBe(0);
      expect(config.getQuotaLimit()).toBe(100);
    });

    it('should emit QuotaChanged when model is switched via setModel', async () => {
      mockCodeAssistServer.retrieveUserQuota.mockResolvedValue({
        buckets: [
          {
            modelId: 'gemini-2.5-pro',
            remainingAmount: '10',
            remainingFraction: 0.2,
          },
          {
            modelId: 'gemini-2.5-flash',
            remainingAmount: '80',
            remainingFraction: 0.8,
          },
        ],
      });

      config.setModel('auto-gemini-2.5');
      await config.refreshUserQuota();
      mockCoreEvents.emitQuotaChanged.mockClear();

      // Switch to a specific model — should re-emit quota for that model
      config.setModel('gemini-2.5-pro');
      expect(mockCoreEvents.emitQuotaChanged).toHaveBeenCalledWith(
        10,
        50,
        undefined,
      );
    });
  });

  describe('refreshUserQuotaIfStale', () => {
    beforeEach(() => {
      vi.useFakeTimers();
      vi.setSystemTime(new Date('2025-01-01T00:00:00Z'));
    });

    afterEach(() => {
      vi.useRealTimers();
    });

    it('should refresh quota if stale', async () => {
      mockCodeAssistServer.retrieveUserQuota.mockResolvedValue({
        buckets: [],
      });

      // First call to initialize lastQuotaFetchTime
      await config.refreshUserQuota();
      expect(mockCodeAssistServer.retrieveUserQuota).toHaveBeenCalledTimes(1);

      // Advance time by 31 seconds (default TTL is 30s)
      vi.setSystemTime(Date.now() + 31_000);

      await config.refreshUserQuotaIfStale();
      expect(mockCodeAssistServer.retrieveUserQuota).toHaveBeenCalledTimes(2);
    });

    it('should not refresh quota if fresh', async () => {
      mockCodeAssistServer.retrieveUserQuota.mockResolvedValue({
        buckets: [],
      });

      // First call
      await config.refreshUserQuota();
      expect(mockCodeAssistServer.retrieveUserQuota).toHaveBeenCalledTimes(1);

      // Advance time by only 10 seconds
      vi.setSystemTime(Date.now() + 10_000);

      await config.refreshUserQuotaIfStale();
      expect(mockCodeAssistServer.retrieveUserQuota).toHaveBeenCalledTimes(1);
    });

    it('should respect custom staleMs', async () => {
      mockCodeAssistServer.retrieveUserQuota.mockResolvedValue({
        buckets: [],
      });

      // First call
      await config.refreshUserQuota();
      expect(mockCodeAssistServer.retrieveUserQuota).toHaveBeenCalledTimes(1);

      // Advance time by 5 seconds
      vi.setSystemTime(Date.now() + 5_000);

      // Refresh with 2s staleMs -> should refresh
      await config.refreshUserQuotaIfStale(2_000);
      expect(mockCodeAssistServer.retrieveUserQuota).toHaveBeenCalledTimes(2);

      // Advance by another 5 seconds
      vi.setSystemTime(Date.now() + 5_000);

      // Refresh with 10s staleMs -> should NOT refresh
      await config.refreshUserQuotaIfStale(10_000);
      expect(mockCodeAssistServer.retrieveUserQuota).toHaveBeenCalledTimes(2);
    });
  });

  describe('getUserTier and getUserTierName', () => {
    it('should return undefined if contentGenerator is not initialized', () => {
      const config = new Config(baseParams);
      expect(config.getUserTier()).toBeUndefined();
      expect(config.getUserTierName()).toBeUndefined();
    });

    it('should return values from contentGenerator after refreshAuth', async () => {
      const config = new Config(baseParams);
      const mockTier = UserTierId.STANDARD;
      const mockTierName = 'Standard Tier';

      vi.mocked(createContentGeneratorConfig).mockResolvedValue({
        authType: AuthType.USE_GEMINI,
      } as ContentGeneratorConfig);

      vi.mocked(createContentGenerator).mockResolvedValue({
        userTier: mockTier,
        userTierName: mockTierName,
      } as Partial<CodeAssistServer> as CodeAssistServer);

      await config.refreshAuth(AuthType.USE_GEMINI);

      expect(config.getUserTier()).toBe(mockTier);
      expect(config.getUserTierName()).toBe(mockTierName);
    });
  });

  describe('isPlanEnabled', () => {
    it('should return true by default', () => {
      const config = new Config(baseParams);
      expect(config.isPlanEnabled()).toBe(true);
    });

    it('should return true when plan is enabled', () => {
      const config = new Config({
        ...baseParams,
        plan: true,
      });
      expect(config.isPlanEnabled()).toBe(true);
    });

    it('should return false when plan is explicitly disabled', () => {
      const config = new Config({
        ...baseParams,
        plan: false,
      });
      expect(config.isPlanEnabled()).toBe(false);
    });
  });

  describe('getPlanModeRoutingEnabled', () => {
    it('should default to true when not provided', async () => {
      const config = new Config(baseParams);
      expect(await config.getPlanModeRoutingEnabled()).toBe(true);
    });

    it('should return true when explicitly enabled in planSettings', async () => {
      const config = new Config({
        ...baseParams,
        planSettings: { modelRouting: true },
      });
      expect(await config.getPlanModeRoutingEnabled()).toBe(true);
    });

    it('should return false when explicitly disabled in planSettings', async () => {
      const config = new Config({
        ...baseParams,
        planSettings: { modelRouting: false },
      });
      expect(await config.getPlanModeRoutingEnabled()).toBe(false);
    });
  });

  describe('validatePathAccess (PathValidator integration)', () => {
    it('should reject pathologically long paths', () => {
      const config = new Config(baseParams);
      const longPath = path.join(baseParams.targetDir, 'a'.repeat(5000));
      const result = config.validatePathAccess(longPath, 'read');
      expect(result).toContain('Invalid path: Path is too long');
    });

    it('should reject paths with log markers', () => {
      const config = new Config(baseParams);
      const logPath = path.join(
        baseParams.targetDir,
        'AssertionError: expected true to be false',
      );
      const result = config.validatePathAccess(logPath, 'read');
      expect(result).toContain(
        'Invalid path: Path appears to be a misinterpreted log fragment',
      );
    });

    it('should reject paths with control characters', () => {
      const config = new Config(baseParams);
      const malformedPath = path.join(
        baseParams.targetDir,
        'file\nwith\nnewline.txt',
      );
      const result = config.validatePathAccess(malformedPath, 'read');
      expect(result).toContain(
        'Invalid path: Path contains invalid characters',
      );
    });

    it('should allow normal paths', () => {
      const config = new Config(baseParams);
      const normalPath = path.resolve(baseParams.targetDir, 'src/index.ts');
      const result = config.validatePathAccess(normalPath, 'read');

      // It might return "Path not in workspace" or similar if not authorized,
      // but it should NOT return the "Invalid path" prefix from PathValidator.
      if (result) {
        expect(result).not.toContain('Invalid path:');
      } else {
        expect(result).toBeNull();
      }
    });
  });
});

describe('Config JIT Initialization', () => {
  let config: Config;
  let mockMemoryContextManager: MemoryContextManager;

  beforeEach(() => {
    vi.clearAllMocks();
    mockMemoryContextManager = {
      refresh: vi.fn(),
      getGlobalMemory: vi.fn().mockReturnValue('Global Memory'),
      getExtensionMemory: vi.fn().mockReturnValue('Extension Memory'),
      getEnvironmentMemory: vi
        .fn()
        .mockReturnValue('Environment Memory\n\nMCP Instructions'),
      getUserProjectMemory: vi.fn().mockReturnValue(''),
      getLoadedPaths: vi.fn().mockReturnValue(new Set(['/path/to/GEMINI.md'])),
    } as unknown as MemoryContextManager;
    (MemoryContextManager as unknown as Mock).mockImplementation(
      () => mockMemoryContextManager,
    );
  });

  it('should initialize MemoryContextManager, load memory, and delegate to it', async () => {
    const params: ConfigParameters = {
      sessionId: 'test-session',
      targetDir: '/tmp/test',
      debugMode: false,
      model: 'test-model',
      userMemory: 'Initial Memory',
      cwd: '/tmp/test',
    };

    config = new Config(params);
    await config.initialize();

    expect(MemoryContextManager).toHaveBeenCalledWith(config);
    expect(mockMemoryContextManager.refresh).toHaveBeenCalled();
    expect(config.getUserMemory()).toEqual({
      global: 'Global Memory',
      extension: 'Extension Memory',
      project: 'Environment Memory\n\nMCP Instructions',
      userProjectMemory: '',
    });

    // Tier 1: system instruction gets only global memory
    expect(config.getSystemInstructionMemory()).toBe('Global Memory');

    // Tier 2: session memory gets extension + project formatted with XML tags
    const sessionMemory = config.getSessionMemory();
    expect(sessionMemory).toContain('<loaded_context>');
    expect(sessionMemory).toContain('<extension_context>');
    expect(sessionMemory).toContain('Extension Memory');
    expect(sessionMemory).toContain('</extension_context>');
    expect(sessionMemory).toContain('<project_context>');
    expect(sessionMemory).toContain('Environment Memory');
    expect(sessionMemory).toContain('MCP Instructions');
    expect(sessionMemory).toContain('</project_context>');
    expect(sessionMemory).toContain('</loaded_context>');

    const sessionMemoryWithoutExtension = config.getSessionMemory({
      includeExtensionContext: false,
    });
    expect(sessionMemoryWithoutExtension).toContain('<loaded_context>');
    expect(sessionMemoryWithoutExtension).not.toContain('<extension_context>');
    expect(sessionMemoryWithoutExtension).not.toContain('Extension Memory');
    expect(sessionMemoryWithoutExtension).toContain('<project_context>');
    expect(sessionMemoryWithoutExtension).toContain('Environment Memory');
    expect(sessionMemoryWithoutExtension).toContain('</loaded_context>');

    // Verify state update (delegated to MemoryContextManager)
    expect(config.getGeminiMdFileCount()).toBe(1);
    expect(config.getGeminiMdFilePaths()).toEqual(['/path/to/GEMINI.md']);
  });

  describe('memory path access', () => {
    it('should NOT add the global ~/.gemini directory to the workspace', async () => {
      // Memory does not broaden the workspace to include the global ~/.gemini/
      // directory. Cross-project personal preferences are routed to
      // ~/.gemini/GEMINI.md via the surgical isPathAllowed allowlist instead.
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
      };

      config = new Config(params);
      await config.initialize();

      const directories = config.getWorkspaceContext().getDirectories();
      expect(directories).not.toContain(Storage.getGlobalGeminiDir());
    });

    it('should allow isPathAllowed to write the global ~/.gemini/GEMINI.md file', async () => {
      // Surgical allowlist: the prompt routes cross-project personal
      // preferences to ~/.gemini/GEMINI.md, so the agent must be able to edit
      // that exact file via edit/write_file.
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
      };

      config = new Config(params);
      await config.initialize();

      const globalGeminiMdPath = path.join(
        Storage.getGlobalGeminiDir(),
        'GEMINI.md',
      );
      expect(config.isPathAllowed(globalGeminiMdPath)).toBe(true);
    });

    it('should NOT allow isPathAllowed to write other files under ~/.gemini/ (least privilege)', async () => {
      // The allowlist is surgical: only ~/.gemini/GEMINI.md is reachable.
      // settings.json, keybindings.json, credentials, etc. remain disallowed.
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
      };

      config = new Config(params);
      await config.initialize();

      const globalDir = Storage.getGlobalGeminiDir();
      expect(config.isPathAllowed(path.join(globalDir, 'settings.json'))).toBe(
        false,
      );
      expect(
        config.isPathAllowed(path.join(globalDir, 'keybindings.json')),
      ).toBe(false);
      expect(
        config.isPathAllowed(path.join(globalDir, 'oauth_creds.json')),
      ).toBe(false);
    });

    it('should NOT allow isPathAllowed to write into the auto-memory inbox', () => {
      // <projectMemoryDir>/.inbox/ is owned by the extraction agent and the
      // /memory inbox review flow. The main agent must not be able to drop
      // patches in there directly, even though it falls inside <projectTempDir>.
      // We bypass Config.initialize() (the GitService init path is independently
      // flaky in this suite) by spying on the storage methods isPathAllowed
      // actually consults.
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
      };

      config = new Config(params);

      const fakeMemoryTempDir = '/tmp/test-fake-temp/memory';
      const fakeProjectTempDir = '/tmp/test-fake-temp';
      vi.spyOn(config.storage, 'getProjectMemoryTempDir').mockReturnValue(
        fakeMemoryTempDir,
      );
      vi.spyOn(config.storage, 'getProjectTempDir').mockReturnValue(
        fakeProjectTempDir,
      );

      const inboxRoot = path.join(fakeMemoryTempDir, '.inbox');

      // The inbox directory itself and any path under it are denied.
      expect(config.isPathAllowed(inboxRoot)).toBe(false);
      expect(
        config.isPathAllowed(path.join(inboxRoot, 'private', 'foo.patch')),
      ).toBe(false);
      expect(
        config.isPathAllowed(path.join(inboxRoot, 'global', 'bar.patch')),
      ).toBe(false);

      // Sibling files under <projectMemoryDir> stay reachable so the main
      // agent can edit MEMORY.md and topic notes directly.
      expect(
        config.isPathAllowed(path.join(fakeMemoryTempDir, 'MEMORY.md')),
      ).toBe(true);
      expect(
        config.isPathAllowed(path.join(fakeMemoryTempDir, 'some-topic.md')),
      ).toBe(true);
    });

    it('should allow scoped extraction access only to canonical inbox patches', () => {
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
      };

      config = new Config(params);

      const fakeMemoryTempDir = '/tmp/test-fake-temp/memory';
      const fakeProjectTempDir = '/tmp/test-fake-temp';
      vi.spyOn(config.storage, 'getProjectMemoryTempDir').mockReturnValue(
        fakeMemoryTempDir,
      );
      vi.spyOn(config.storage, 'getProjectTempDir').mockReturnValue(
        fakeProjectTempDir,
      );

      const inboxRoot = path.join(fakeMemoryTempDir, '.inbox');
      const privateExtractionPatch = path.join(
        inboxRoot,
        'private',
        'extraction.patch',
      );
      const globalExtractionPatch = path.join(
        inboxRoot,
        'global',
        'extraction.patch',
      );

      expect(config.isPathAllowed(privateExtractionPatch)).toBe(false);

      runWithScopedMemoryInboxAccess(() => {
        expect(config.isPathAllowed(privateExtractionPatch)).toBe(true);
        expect(config.validatePathAccess(privateExtractionPatch)).toBeNull();
        expect(config.isPathAllowed(globalExtractionPatch)).toBe(true);
        // Writes (the default checkType for isPathAllowed) remain restricted
        // to the canonical extraction.patch filenames.
        expect(
          config.isPathAllowed(path.join(inboxRoot, 'private', 'other.patch')),
        ).toBe(false);
        expect(
          config.isPathAllowed(
            path.join(inboxRoot, 'private', 'nested', 'extraction.patch'),
          ),
        ).toBe(false);

        // Reads are broadened to the .inbox/{private,global}/ subtree so the
        // extractor can list and inspect prior patches before consolidating.
        const privateOtherPatch = path.join(
          inboxRoot,
          'private',
          'other.patch',
        );
        const globalLeftover = path.join(inboxRoot, 'global', 'topic-a.patch');
        const nestedReadPath = path.join(
          inboxRoot,
          'private',
          'nested',
          'extraction.patch',
        );
        expect(config.validatePathAccess(privateOtherPatch, 'read')).toBeNull();
        expect(config.validatePathAccess(globalLeftover, 'read')).toBeNull();
        expect(config.validatePathAccess(nestedReadPath, 'read')).toBeNull();
        expect(config.validatePathAccess(inboxRoot, 'read')).toBeNull();
        expect(
          config.validatePathAccess(path.join(inboxRoot, 'private'), 'read'),
        ).toBeNull();
        expect(
          config.validatePathAccess(path.join(inboxRoot, 'global'), 'read'),
        ).toBeNull();

        // Writes to the same broadened paths are still rejected.
        expect(config.validatePathAccess(privateOtherPatch)).toContain(
          'Path not in workspace',
        );
        expect(config.validatePathAccess(nestedReadPath)).toContain(
          'Path not in workspace',
        );
      });

      expect(config.isPathAllowed(privateExtractionPatch)).toBe(false);
      // Outside the scope, reads of inbox files are denied again.
      expect(
        config.validatePathAccess(
          path.join(inboxRoot, 'private', 'other.patch'),
          'read',
        ),
      ).toContain('Path not in workspace');
    });

    it('should restrict scoped auto-memory extraction writes to generated artifacts', () => {
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
      };

      config = new Config(params);

      const fakeMemoryTempDir = '/tmp/test-fake-temp/memory';
      const fakeProjectTempDir = '/tmp/test-fake-temp';
      const fakeSkillsMemoryDir = path.join(fakeMemoryTempDir, 'skills');
      vi.spyOn(config.storage, 'getProjectMemoryTempDir').mockReturnValue(
        fakeMemoryTempDir,
      );
      vi.spyOn(config.storage, 'getProjectTempDir').mockReturnValue(
        fakeProjectTempDir,
      );
      vi.spyOn(config.storage, 'getProjectSkillsMemoryDir').mockReturnValue(
        fakeSkillsMemoryDir,
      );

      const inboxRoot = path.join(fakeMemoryTempDir, '.inbox');
      const privateExtractionPatch = path.join(
        inboxRoot,
        'private',
        'extraction.patch',
      );
      const skillArtifact = path.join(
        fakeSkillsMemoryDir,
        'my-skill',
        'SKILL.md',
      );
      const activeMemoryPath = path.join(fakeMemoryTempDir, 'MEMORY.md');
      const projectTempPath = path.join(fakeProjectTempDir, 'logs', 'run.log');
      const workspaceMemoryPath = path.join('/tmp/test', 'GEMINI.md');

      expect(config.validatePathAccess(activeMemoryPath)).toBeNull();

      runWithScopedAutoMemoryExtractionWriteAccess(() => {
        expect(config.validatePathAccess(skillArtifact)).toBeNull();
        expect(config.validatePathAccess(activeMemoryPath)).toContain(
          'Auto-memory extraction write denied',
        );
        expect(config.validatePathAccess(projectTempPath)).toContain(
          'Auto-memory extraction write denied',
        );
        expect(config.validatePathAccess(workspaceMemoryPath)).toContain(
          'Auto-memory extraction write denied',
        );

        // Reads still use the normal workspace/temp allowlists.
        expect(config.validatePathAccess(activeMemoryPath, 'read')).toBeNull();
      });

      runWithScopedMemoryInboxAccess(() => {
        runWithScopedAutoMemoryExtractionWriteAccess(() => {
          expect(config.validatePathAccess(privateExtractionPatch)).toBeNull();
        });
      });
    });
  });

  describe('isAutoMemoryEnabled', () => {
    it('should default to false', () => {
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
      };

      config = new Config(params);
      expect(config.isAutoMemoryEnabled()).toBe(false);
    });

    it('should return true when experimentalAutoMemory is true', () => {
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
        experimentalAutoMemory: true,
      };

      config = new Config(params);
      expect(config.isAutoMemoryEnabled()).toBe(true);
    });

    it('should return true when experimentalGemma is true', () => {
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
        experimentalGemma: true,
      };

      config = new Config(params);
      expect(config.getExperimentalGemma()).toBe(true);
    });

    it('should return false when experimentalGemma is false', () => {
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
        experimentalGemma: false,
      };

      config = new Config(params);
      expect(config.getExperimentalGemma()).toBe(false);
    });

    it('should return true when experimentalGemma is not provided', () => {
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
      };

      config = new Config(params);
      expect(config.getExperimentalGemma()).toBe(true);
    });

    it('should default to disabled', () => {
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
      };

      config = new Config(params);
      expect(config.isAutoMemoryEnabled()).toBe(false);
    });
  });

  describe('reloadSkills', () => {
    it('should refresh disabledSkills and re-register ActivateSkillTool when skills exist', async () => {
      const mockOnReload = vi.fn().mockResolvedValue({
        disabledSkills: ['skill2'],
      });
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
        skillsSupport: true,
        onReload: mockOnReload,
      };

      config = new Config(params);
      await config.initialize();

      const skillManager = config.getSkillManager();
      const loopContext: AgentLoopContext = config;
      const toolRegistry = loopContext.toolRegistry;

      vi.spyOn(skillManager, 'discoverSkills').mockResolvedValue(undefined);
      vi.spyOn(skillManager, 'setDisabledSkills');
      vi.spyOn(toolRegistry, 'registerTool');
      vi.spyOn(toolRegistry, 'unregisterTool');

      const mockSkills = [{ name: 'skill1' }];
      vi.spyOn(skillManager, 'getSkills').mockReturnValue(
        mockSkills as SkillDefinition[],
      );

      await config.reloadSkills();

      expect(mockOnReload).toHaveBeenCalled();
      expect(skillManager.setDisabledSkills).toHaveBeenCalledWith(['skill2']);
      expect(toolRegistry.registerTool).toHaveBeenCalled();
      expect(toolRegistry.unregisterTool).toHaveBeenCalledWith(
        ACTIVATE_SKILL_TOOL_NAME,
      );
    });

    it('should unregister ActivateSkillTool when no skills exist after reload', async () => {
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
        skillsSupport: true,
      };

      config = new Config(params);
      await config.initialize();

      const skillManager = config.getSkillManager();
      const loopContext: AgentLoopContext = config;
      const toolRegistry = loopContext.toolRegistry;

      vi.spyOn(skillManager, 'discoverSkills').mockResolvedValue(undefined);
      vi.spyOn(toolRegistry, 'registerTool');
      vi.spyOn(toolRegistry, 'unregisterTool');

      vi.spyOn(skillManager, 'getSkills').mockReturnValue([]);

      await config.reloadSkills();

      expect(toolRegistry.unregisterTool).toHaveBeenCalledWith(
        ACTIVATE_SKILL_TOOL_NAME,
      );
    });

    it('should clear disabledSkills when onReload returns undefined for them', async () => {
      const mockOnReload = vi.fn().mockResolvedValue({
        disabledSkills: undefined,
      });
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
        skillsSupport: true,
        onReload: mockOnReload,
      };

      config = new Config(params);
      // Initially set some disabled skills
      // @ts-expect-error - accessing private
      config.disabledSkills = ['skill1'];
      await config.initialize();

      const skillManager = config.getSkillManager();
      vi.spyOn(skillManager, 'discoverSkills').mockResolvedValue(undefined);
      vi.spyOn(skillManager, 'setDisabledSkills');

      await config.reloadSkills();

      expect(skillManager.setDisabledSkills).toHaveBeenCalledWith([]);
    });

    it('should update admin settings from onReload', async () => {
      const mockOnReload = vi.fn().mockResolvedValue({
        adminSkillsEnabled: false,
      });
      const params: ConfigParameters = {
        sessionId: 'test-session',
        targetDir: '/tmp/test',
        debugMode: false,
        model: 'test-model',
        cwd: '/tmp/test',
        skillsSupport: true,
        onReload: mockOnReload,
      };

      config = new Config(params);
      await config.initialize();

      const skillManager = config.getSkillManager();
      vi.spyOn(skillManager, 'setAdminSettings');

      await config.reloadSkills();

      expect(skillManager.setAdminSettings).toHaveBeenCalledWith(false);
    });
  });
});

describe('Plans Directory Initialization', () => {
  const baseParams: ConfigParameters = {
    sessionId: 'test-session',
    targetDir: '/tmp/test',
    debugMode: false,
    model: 'test-model',
    cwd: '/tmp/test',
  };

  beforeEach(() => {
    vi.spyOn(fs.promises, 'mkdir').mockResolvedValue(undefined);
  });

  afterEach(() => {
    vi.mocked(fs.promises.mkdir).mockRestore();
    vi.mocked(fs.promises.access).mockRestore?.();
  });

  it('should add plans directory to workspace context if it exists', async () => {
    vi.spyOn(fs.promises, 'access').mockResolvedValue(undefined);
    const config = new Config({
      ...baseParams,
      plan: true,
    });

    await config.initialize();

    const plansDir = config.storage.getPlansDir();
    // Should NOT create the directory eagerly
    expect(fs.promises.mkdir).not.toHaveBeenCalled();
    // Should check if it exists
    expect(fs.promises.access).toHaveBeenCalledWith(plansDir);

    const context = config.getWorkspaceContext();
    expect(context.getDirectories()).toContain(plansDir);
  });

  it('should NOT add plans directory to workspace context if it does not exist', async () => {
    vi.spyOn(fs.promises, 'access').mockRejectedValue({ code: 'ENOENT' });
    const config = new Config({
      ...baseParams,
      plan: true,
    });

    await config.initialize();

    const plansDir = config.storage.getPlansDir();
    expect(fs.promises.mkdir).not.toHaveBeenCalled();
    expect(fs.promises.access).toHaveBeenCalledWith(plansDir);

    const context = config.getWorkspaceContext();
    expect(context.getDirectories()).not.toContain(plansDir);
  });

  it('should gracefully fallback to default plans directory if retrieving custom directory throw an error', async () => {
    vi.spyOn(coreEvents, 'emitFeedback');
    vi.spyOn(fs.promises, 'access').mockResolvedValue(undefined);
    const config = new Config({
      ...baseParams,
      plan: true,
      planSettings: {
        directory: '/outside/project/root',
      },
    });

    await config.initialize();

    const plansDir = config.storage.getPlansDir();
    // Should fallback to default project temp plans dir
    expect(plansDir).toContain('plans');
    expect(plansDir).not.toContain('/outside/project/root');

    // Should emit a warning feedback
    expect(coreEvents.emitFeedback).toHaveBeenCalledWith(
      'warning',
      expect.stringContaining('Invalid custom plans directory'),
      expect.any(Error),
    );

    // Should still add the fallback plans directory to workspace context if it exists
    const context = config.getWorkspaceContext();
    expect(context.getDirectories()).toContain(plansDir);
  });

  it('should NOT create plans directory or add it to workspace context when plan is disabled', async () => {
    const config = new Config({
      ...baseParams,
      plan: false,
    });

    await config.initialize();

    const plansDir = config.storage.getPlansDir();
    expect(fs.promises.mkdir).not.toHaveBeenCalledWith(plansDir, {
      recursive: true,
    });
  });
});

describe('Model Persistence Bug Fix (#19864)', () => {
  const baseParams: ConfigParameters = {
    sessionId: 'test-session',
    cwd: '/tmp',
    targetDir: '/path/to/target',
    debugMode: false,
    model: PREVIEW_GEMINI_3_1_MODEL, // User saved preview model
  };

  it('should NOT reset preview model for CodeAssist auth when refreshUserQuota is not called (no projectId)', async () => {
    const mockContentConfig = {
      authType: AuthType.LOGIN_WITH_GOOGLE,
    } as Partial<ContentGeneratorConfig> as ContentGeneratorConfig;

    const mockContentGenerator = {
      generateContent: vi.fn(),
    } as Partial<ContentGenerator> as ContentGenerator;

    vi.mocked(createContentGeneratorConfig).mockResolvedValue(
      mockContentConfig,
    );
    vi.mocked(createContentGenerator).mockResolvedValue(mockContentGenerator);
    // getCodeAssistServer returns undefined by default, so refreshUserQuota() isn't called;
    // hasAccessToPreviewModel stays null; reset only when === false, so we don't reset.
    const config = new Config(baseParams);

    // Verify initial model is the preview model
    expect(config.getModel()).toBe(PREVIEW_GEMINI_3_1_MODEL);

    // Call refreshAuth to simulate restart (CodeAssist auth, no projectId)
    await config.refreshAuth(AuthType.LOGIN_WITH_GOOGLE);

    // Verify the model was NOT reset (bug fix)
    expect(config.getModel()).toBe(PREVIEW_GEMINI_3_1_MODEL);
    expect(config.getModel()).not.toBe(DEFAULT_GEMINI_MODEL_AUTO);
  });

  it('should NOT reset preview model for USE_GEMINI (hasAccessToPreviewModel is set to true)', async () => {
    const mockContentConfig = {
      authType: AuthType.USE_GEMINI,
    } as Partial<ContentGeneratorConfig> as ContentGeneratorConfig;

    const mockContentGenerator = {
      generateContent: vi.fn(),
    } as Partial<ContentGenerator> as ContentGenerator;

    vi.mocked(createContentGeneratorConfig).mockResolvedValue(
      mockContentConfig,
    );
    vi.mocked(createContentGenerator).mockResolvedValue(mockContentGenerator);

    const config = new Config(baseParams);

    // Verify initial model is the preview model
    expect(config.getModel()).toBe(PREVIEW_GEMINI_3_1_MODEL);

    // Call refreshAuth
    await config.refreshAuth(AuthType.USE_GEMINI);

    // For USE_GEMINI, hasAccessToPreviewModel should be set to true
    // So the model should NOT be reset
    expect(config.getModel()).toBe(PREVIEW_GEMINI_3_1_MODEL);
    expect(config.getHasAccessToPreviewModel()).toBe(true);
  });

  it('should persist model when user selects it with persistMode=true', () => {
    const onModelChange = vi.fn();
    const config = new Config({
      ...baseParams,
      model: DEFAULT_GEMINI_MODEL_AUTO, // Initial model
      onModelChange,
    });

    // User selects preview model with persist mode enabled
    config.setModel(PREVIEW_GEMINI_3_1_MODEL, false); // isTemporary = false

    // Verify onModelChange was called to persist the model
    expect(onModelChange).toHaveBeenCalledWith(PREVIEW_GEMINI_3_1_MODEL);
    expect(config.getModel()).toBe(PREVIEW_GEMINI_3_1_MODEL);
  });
});

describe('ConfigSchema validation', () => {
  it('should validate a valid sandbox config', async () => {
    const validConfig = {
      sandbox: {
        enabled: true,
        allowedPaths: ['/tmp'],
        networkAccess: false,
        command: 'docker',
        image: 'node:20',
      },
    };

    const { ConfigSchema } = await import('./config.js');
    const result = ConfigSchema.safeParse(validConfig);
    expect(result.success).toBe(true);
    if (result.success) {
      expect(result.data.sandbox?.enabled).toBe(true);
    }
  });

  it('should apply defaults in ConfigSchema', async () => {
    const minimalConfig = {
      sandbox: {},
    };

    const { ConfigSchema } = await import('./config.js');
    const result = ConfigSchema.safeParse(minimalConfig);
    expect(result.success).toBe(true);
    if (result.success) {
      expect(result.data.sandbox?.enabled).toBe(false);
      expect(result.data.sandbox?.allowedPaths).toEqual([]);
      expect(result.data.sandbox?.networkAccess).toBe(false);
    }
  });
});

describe('ADKSettings', () => {
  const baseParams: ConfigParameters = {
    sessionId: 'test',
    targetDir: '.',
    debugMode: false,
    model: 'test-model',
    cwd: '.',
  };

  it('should default agentSessionNoninteractiveEnabled to false', () => {
    const config = new Config(baseParams);
    expect(config.getAgentSessionNoninteractiveEnabled()).toBe(false);
  });

  it('should return provided agentSessionNoninteractiveEnabled', () => {
    const params: ConfigParameters = {
      ...baseParams,
      adk: {
        agentSessionNoninteractiveEnabled: true,
      },
    };
    const config = new Config(params);
    expect(config.getAgentSessionNoninteractiveEnabled()).toBe(true);
  });
});