import { render, screen, waitFor, within } from "@testing-library/react";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { QueryClientProvider, QueryClient } from "@tanstack/react-query";
import userEvent from "@testing-library/user-event";
import { createRoutesStub } from "react-router";
import { createAxiosNotFoundErrorObject } from "test-utils";
import HomeScreen from "#/routes/home";
import { GitRepository } from "#/types/git";
import SettingsService from "#/api/settings-service/settings-service.api";
import GitService from "#/api/git-service/git-service.api";
import OptionService from "#/api/option-service/option-service.api";
import AuthService from "#/api/auth-service/auth-service.api";
import MainApp from "#/routes/root-layout";
import { MOCK_DEFAULT_USER_SETTINGS } from "#/mocks/handlers";

const { DEFAULT_FEATURE_FLAGS, useIsAuthedMock, useConfigMock, mockUseAppMode } = vi.hoisted(
  () => {
    const defaultFeatureFlags = {
      enable_billing: false,
      hide_llm_settings: false,
      enable_jira: false,
      enable_jira_dc: false,
      enable_linear: false,
      hide_users_page: false,
      hide_billing_page: false,
      hide_integrations_page: false,
      enable_onboarding: false,
    };

    return {
      DEFAULT_FEATURE_FLAGS: defaultFeatureFlags,
      useIsAuthedMock: vi.fn().mockReturnValue({
        data: true,
        isLoading: false,
        isFetching: false,
        isError: false,
      }),
      useConfigMock: vi.fn().mockReturnValue({
        data: {
          app_mode: "oss",
          feature_flags: defaultFeatureFlags,
        },
        isLoading: false,
      }),
      mockUseAppMode: vi.fn().mockReturnValue({
        isOss: true,
        isSaas: false,
        isCloud: false,
        isSelfHosted: false,
        isEnterpriseSelfHosted: false,
        isEnterpriseCloud: false,
        appMode: "oss",
        deploymentMode: undefined,
      }),
    };
  },
);

vi.mock("#/hooks/query/use-is-authed", () => ({
  useIsAuthed: () => useIsAuthedMock(),
}));

vi.mock("#/hooks/query/use-config", () => ({
  useConfig: () => useConfigMock(),
}));

vi.mock("#/hooks/use-app-mode", () => ({
  useAppMode: () => mockUseAppMode() ?? {
    isOss: true,
    isSaas: false,
    isCloud: false,
    isSelfHosted: false,
    isEnterpriseSelfHosted: false,
    isEnterpriseCloud: false,
    appMode: "oss",
    deploymentMode: undefined,
  },
}));

const RouterStub = createRoutesStub([
  {
    Component: MainApp,
    path: "/",
    children: [
      {
        Component: HomeScreen,
        path: "/",
      },
      {
        Component: () => <div data-testid="conversation-screen" />,
        path: "/conversations/:conversationId",
      },
      {
        Component: () => <div data-testid="settings-screen" />,
        path: "/settings",
      },
    ],
  },
  {
    Component: () => <div data-testid="login-page" />,
    path: "/login",
  },
]);

const selectRepository = async (repoName: string) => {
  const repoConnector = screen.getByTestId("repo-connector");

  // First select the provider
  const providerDropdown = await waitFor(() =>
    screen.getByTestId("git-provider-dropdown"),
  );
  await userEvent.click(providerDropdown);
  await userEvent.click(screen.getByText("GitHub"));

  // Then select the repository
  const repoInput = within(repoConnector).getByTestId("git-repo-dropdown");
  await userEvent.click(repoInput);

  // Wait for the options to be loaded and displayed
  await waitFor(() => {
    const dropdownMenu = screen.getByTestId("git-repo-dropdown-menu");
    expect(within(dropdownMenu).getByText(repoName)).toBeInTheDocument();
  });
  const dropdownMenu = screen.getByTestId("git-repo-dropdown-menu");
  await userEvent.click(within(dropdownMenu).getByText(repoName));

  // Wait for the branch to be auto-selected
  await waitFor(() => {
    const branchInput = screen.getByTestId("git-branch-dropdown-input");
    expect(branchInput).toHaveValue("main");
  });
};

const renderHomeScreen = () =>
  render(<RouterStub />, {
    wrapper: ({ children }) => (
      <QueryClientProvider client={new QueryClient()}>
        {children}
      </QueryClientProvider>
    ),
  });

const MOCK_RESPOSITORIES: GitRepository[] = [
  {
    id: "1",
    full_name: "octocat/hello-world",
    git_provider: "github",
    is_public: true,
    main_branch: "main",
  },
  {
    id: "2",
    full_name: "octocat/earth",
    git_provider: "github",
    is_public: true,
    main_branch: "main",
  },
];

describe("HomeScreen", () => {
  beforeEach(() => {
    vi.clearAllMocks();

    useIsAuthedMock.mockReturnValue({
      data: true,
      isLoading: false,
      isFetching: false,
      isError: false,
    });
    useConfigMock.mockReturnValue({
      data: { app_mode: "oss", feature_flags: DEFAULT_FEATURE_FLAGS },
      isLoading: false,
    });

    // Mock config to avoid SaaS redirect logic
    vi.spyOn(OptionService, "getConfig").mockResolvedValue({
      app_mode: "oss",
      posthog_client_key: "test-posthog-key",
      providers_configured: ["github"],
      auth_url: "https://auth.example.com",
      feature_flags: DEFAULT_FEATURE_FLAGS,
      maintenance_start_time: null,
      recaptcha_site_key: null,
      faulty_models: [],
      error_message: null,
      updated_at: "2024-01-14T10:00:00Z",
      github_app_slug: null,
    });

    vi.spyOn(AuthService, "authenticate").mockResolvedValue(true);

    vi.spyOn(SettingsService, "getSettings").mockResolvedValue({
      ...MOCK_DEFAULT_USER_SETTINGS,
      provider_tokens_set: {
        github: "fake-token",
        gitlab: "fake-token",
      },
    });

    vi.stubGlobal("localStorage", {
      getItem: vi.fn(() => null),
      setItem: vi.fn(),
      removeItem: vi.fn(),
      clear: vi.fn(),
    });
  });

  afterEach(() => {
    vi.restoreAllMocks();
    vi.unstubAllGlobals();
  });

  it("should render", async () => {
    renderHomeScreen();
    await screen.findByTestId("home-screen");
  });

  it("should render the repository connector and suggested tasks sections", async () => {
    renderHomeScreen();

    await waitFor(() => {
      screen.getByTestId("repo-connector");
      screen.getByTestId("task-suggestions");
    });
  });

  it("should have responsive layout for mobile and desktop screens", async () => {
    renderHomeScreen();

    const homeScreenNewConversationSection = screen.getByTestId(
      "home-screen-new-conversation-section",
    );
    expect(homeScreenNewConversationSection).toHaveClass(
      "flex",
      "flex-col",
      "md:flex-row",
    );

    const homeScreenRecentConversationsSection = screen.getByTestId(
      "home-screen-recent-conversations-section",
    );
    expect(homeScreenRecentConversationsSection).toHaveClass(
      "flex",
      "flex-col",
      "md:flex-row",
    );
  });

  it("should filter the suggested tasks based on the selected repository", async () => {
    const retrieveUserGitRepositoriesSpy = vi.spyOn(
      GitService,
      "retrieveUserGitRepositories",
    );
    retrieveUserGitRepositoriesSpy.mockResolvedValue({
      items: MOCK_RESPOSITORIES,
      next_page_id: null,
    });

    // Mock the repository branches API call
    vi.spyOn(GitService, "getRepositoryBranches").mockResolvedValue({
      items: [
        { name: "main", commit_sha: "123", protected: false },
        { name: "develop", commit_sha: "456", protected: false },
      ],
      next_page_id: null,
    });

    renderHomeScreen();

    const taskSuggestions = await screen.findByTestId("task-suggestions");

    // Initially, all tasks should be visible
    await waitFor(() => {
      within(taskSuggestions).getByText("octocat/hello-world");
      within(taskSuggestions).getByText("octocat/earth");
    });

    // Select a repository using the helper function
    await selectRepository("octocat/hello-world");

    // After selecting a repository, only tasks related to that repository should be visible
    await waitFor(() => {
      within(taskSuggestions).getByText("octocat/hello-world");
      expect(
        within(taskSuggestions).queryByText("octocat/earth"),
      ).not.toBeInTheDocument();
    });
  });

  it("should filter tasks when different repositories are selected", async () => {
    const retrieveUserGitRepositoriesSpy = vi.spyOn(
      GitService,
      "retrieveUserGitRepositories",
    );
    retrieveUserGitRepositoriesSpy.mockResolvedValue({
      items: MOCK_RESPOSITORIES,
      next_page_id: null,
    });

    // Mock the repository branches API call
    vi.spyOn(GitService, "getRepositoryBranches").mockResolvedValue({
      items: [
        { name: "main", commit_sha: "123", protected: false },
        { name: "develop", commit_sha: "456", protected: false },
      ],
      next_page_id: null,
    });

    renderHomeScreen();

    const taskSuggestions = await screen.findByTestId("task-suggestions");

    // Initially, all tasks should be visible
    await waitFor(() => {
      within(taskSuggestions).getByText("octocat/hello-world");
      within(taskSuggestions).getByText("octocat/earth");
    });

    // Select the first repository
    await selectRepository("octocat/hello-world");

    // After selecting first repository, only tasks related to that repository should be visible
    await waitFor(() => {
      within(taskSuggestions).getByText("octocat/hello-world");
      expect(
        within(taskSuggestions).queryByText("octocat/earth"),
      ).not.toBeInTheDocument();
    });

    // Now select the second repository
    await selectRepository("octocat/earth");

    // After selecting second repository, only tasks related to that repository should be visible
    await waitFor(() => {
      within(taskSuggestions).getByText("octocat/earth");
      expect(
        within(taskSuggestions).queryByText("octocat/hello-world"),
      ).not.toBeInTheDocument();
    });
  });

  describe("launch buttons", () => {
    const setupLaunchButtons = async () => {
      let headerLaunchButton = screen.getByTestId(
        "launch-new-conversation-button",
      );
      let repoLaunchButton = await screen.findByTestId("repo-launch-button");
      let tasksLaunchButtons =
        await screen.findAllByTestId("task-launch-button");

      // Mock the repository branches API call
      vi.spyOn(GitService, "getRepositoryBranches").mockResolvedValue({
        items: [
          { name: "main", commit_sha: "123", protected: false },
          { name: "develop", commit_sha: "456", protected: false },
        ],
        next_page_id: null,
      });

      // Select a repository to enable the repo launch button
      await selectRepository("octocat/hello-world");

      // Wait for all buttons to be enabled
      await waitFor(() => {
        expect(headerLaunchButton).not.toBeDisabled();
        expect(repoLaunchButton).not.toBeDisabled();
        tasksLaunchButtons.forEach((button) => {
          expect(button).not.toBeDisabled();
        });
      });

      headerLaunchButton = screen.getByTestId("launch-new-conversation-button");
      repoLaunchButton = screen.getByTestId("repo-launch-button");
      tasksLaunchButtons = await screen.findAllByTestId("task-launch-button");

      return {
        headerLaunchButton,
        repoLaunchButton,
        tasksLaunchButtons,
      };
    };

    beforeEach(() => {
      const retrieveUserGitRepositoriesSpy = vi.spyOn(
        GitService,
        "retrieveUserGitRepositories",
      );
      retrieveUserGitRepositoriesSpy.mockResolvedValue({
        items: MOCK_RESPOSITORIES,
        next_page_id: null,
      });
    });

    it("should disable the other launch buttons when the header launch button is clicked", async () => {
      renderHomeScreen();
      const { headerLaunchButton, repoLaunchButton } =
        await setupLaunchButtons();

      const tasksLaunchButtonsAfter =
        await screen.findAllByTestId("task-launch-button");

      // All other buttons should be disabled when the header button is clicked
      await userEvent.click(headerLaunchButton);

      await waitFor(() => {
        expect(headerLaunchButton).toBeDisabled();
        expect(repoLaunchButton).toBeDisabled();
        tasksLaunchButtonsAfter.forEach((button) => {
          expect(button).toBeDisabled();
        });
      });
    });

    it("should disable the other launch buttons when the repo launch button is clicked", async () => {
      renderHomeScreen();
      const { headerLaunchButton, repoLaunchButton } =
        await setupLaunchButtons();

      const tasksLaunchButtonsAfter =
        await screen.findAllByTestId("task-launch-button");

      // All other buttons should be disabled when the repo button is clicked
      await userEvent.click(repoLaunchButton);

      await waitFor(() => {
        expect(headerLaunchButton).toBeDisabled();
        expect(repoLaunchButton).toBeDisabled();
        tasksLaunchButtonsAfter.forEach((button) => {
          expect(button).toBeDisabled();
        });
      });
    });

    it("should disable the other launch buttons when any task launch button is clicked", async () => {
      renderHomeScreen();
      const { headerLaunchButton, repoLaunchButton, tasksLaunchButtons } =
        await setupLaunchButtons();

      const tasksLaunchButtonsAfter =
        await screen.findAllByTestId("task-launch-button");

      // All other buttons should be disabled when the task button is clicked
      await userEvent.click(tasksLaunchButtons[0]);

      await waitFor(() => {
        expect(headerLaunchButton).toBeDisabled();
        expect(repoLaunchButton).toBeDisabled();
        tasksLaunchButtonsAfter.forEach((button) => {
          expect(button).toBeDisabled();
        });
      });
    });
  });
});

describe("Settings 404", () => {
  const getConfigSpy = vi.spyOn(OptionService, "getConfig");
  const getSettingsSpy = vi.spyOn(SettingsService, "getSettings");

  beforeEach(() => {
    vi.resetAllMocks();

    useIsAuthedMock.mockReturnValue({
      data: true,
      isLoading: false,
      isFetching: false,
      isError: false,
    });
    useConfigMock.mockReturnValue({
      data: { app_mode: "oss", feature_flags: DEFAULT_FEATURE_FLAGS },
      isLoading: false,
    });

    getConfigSpy.mockResolvedValue({
      app_mode: "oss",
      posthog_client_key: "test-posthog-key",
      providers_configured: ["github"],
      auth_url: "https://auth.example.com",
      feature_flags: DEFAULT_FEATURE_FLAGS,
      maintenance_start_time: null,
      recaptcha_site_key: null,
      faulty_models: [],
      error_message: null,
      updated_at: "2024-01-14T10:00:00Z",
      github_app_slug: null,
    });

    vi.spyOn(AuthService, "authenticate").mockResolvedValue(true);

    getSettingsSpy.mockResolvedValue(MOCK_DEFAULT_USER_SETTINGS);

    vi.stubGlobal("localStorage", {
      getItem: vi.fn(() => null),
      setItem: vi.fn(),
      removeItem: vi.fn(),
      clear: vi.fn(),
    });
  });

  afterEach(() => {
    vi.restoreAllMocks();
    vi.unstubAllGlobals();
  });

  it("should open the settings modal if GET /settings fails with a 404", async () => {
    const error = createAxiosNotFoundErrorObject();
    getSettingsSpy.mockRejectedValue(error);

    renderHomeScreen();

    const settingsModal = await screen.findByTestId("ai-config-modal");
    expect(settingsModal).toBeInTheDocument();
  });

  it("should have the correct advanced settings link that opens in a new window", async () => {
    const error = createAxiosNotFoundErrorObject();
    getSettingsSpy.mockRejectedValue(error);

    renderHomeScreen();

    const settingsScreen = screen.queryByTestId("settings-screen");
    expect(settingsScreen).not.toBeInTheDocument();

    const settingsModal = await screen.findByTestId("ai-config-modal");
    expect(settingsModal).toBeInTheDocument();

    const advancedSettingsLink = await screen.findByTestId(
      "advanced-settings-link",
    );

    // The advanced settings link should be an anchor tag that opens in a new window
    const linkElement = advancedSettingsLink.querySelector("a");
    expect(linkElement).toBeInTheDocument();
    expect(linkElement).toHaveAttribute("href", "/settings");
    expect(linkElement).toHaveAttribute("target", "_blank");
    expect(linkElement).toHaveAttribute("rel", "noreferrer noopener");
  });

  it("should not open the settings modal if GET /settings fails but is SaaS mode", async () => {
    useConfigMock.mockReturnValue({
      data: { app_mode: "saas", feature_flags: DEFAULT_FEATURE_FLAGS },
      isLoading: false,
    });

    // @ts-expect-error - we only need app_mode for this test
    getConfigSpy.mockResolvedValue({
      app_mode: "saas",
      feature_flags: DEFAULT_FEATURE_FLAGS,
    });
    const error = createAxiosNotFoundErrorObject();
    getSettingsSpy.mockRejectedValue(error);

    renderHomeScreen();

    expect(screen.queryByTestId("ai-config-modal")).not.toBeInTheDocument();
  });
});

describe("New user welcome toast", () => {
  const getConfigSpy = vi.spyOn(OptionService, "getConfig");
  const getSettingsSpy = vi.spyOn(SettingsService, "getSettings");

  beforeEach(() => {
    vi.clearAllMocks();

    useIsAuthedMock.mockReturnValue({
      data: true,
      isLoading: false,
      isFetching: false,
      isError: false,
    });
    useConfigMock.mockReturnValue({
      data: {
        app_mode: "saas",
        feature_flags: { ...DEFAULT_FEATURE_FLAGS, enable_billing: true },
      },
      isLoading: false,
    });

    getConfigSpy.mockResolvedValue({
      app_mode: "saas",
      posthog_client_key: "test-posthog-key",
      providers_configured: ["github"],
      auth_url: "https://auth.example.com",
      feature_flags: { ...DEFAULT_FEATURE_FLAGS, enable_billing: true },
      maintenance_start_time: null,
      recaptcha_site_key: null,
      faulty_models: [],
      error_message: null,
      updated_at: "2024-01-14T10:00:00Z",
      github_app_slug: null,
    });

    vi.spyOn(AuthService, "authenticate").mockResolvedValue(true);

    getSettingsSpy.mockResolvedValue(MOCK_DEFAULT_USER_SETTINGS);

    vi.stubGlobal("localStorage", {
      getItem: vi.fn(() => null),
      setItem: vi.fn(),
      removeItem: vi.fn(),
      clear: vi.fn(),
    });
  });

  afterEach(() => {
    vi.restoreAllMocks();
    vi.unstubAllGlobals();
  });

  it("should not show the setup payment modal (removed) in SaaS mode for new users", async () => {
    getSettingsSpy.mockResolvedValue({
      ...MOCK_DEFAULT_USER_SETTINGS,
      is_new_user: true,
    });

    renderHomeScreen();

    await screen.findByTestId("root-layout");

    // SetupPaymentModal was removed; verify it no longer renders
    expect(
      screen.queryByTestId("proceed-to-stripe-button"),
    ).not.toBeInTheDocument();
  });
});

describe("HomepageCTA visibility", () => {
  const getConfigSpy = vi.spyOn(OptionService, "getConfig");
  const getSettingsSpy = vi.spyOn(SettingsService, "getSettings");

  beforeEach(() => {
    vi.clearAllMocks();

    vi.spyOn(AuthService, "authenticate").mockResolvedValue(true);

    getSettingsSpy.mockResolvedValue(MOCK_DEFAULT_USER_SETTINGS);

    // Mock localStorage for CTA dismissal
    vi.stubGlobal("localStorage", {
      getItem: vi.fn(() => null),
      setItem: vi.fn(),
      removeItem: vi.fn(),
      clear: vi.fn(),
    });
  });

  afterEach(() => {
    vi.restoreAllMocks();
    vi.unstubAllGlobals();
  });

  it("should show HomepageCTA in SaaS Cloud mode when not dismissed", async () => {
    useIsAuthedMock.mockReturnValue({
      data: true,
      isLoading: false,
      isFetching: false,
      isError: false,
    });
    useConfigMock.mockReturnValue({
      data: { app_mode: "saas", feature_flags: { ...DEFAULT_FEATURE_FLAGS, deployment_mode: "cloud" } },
      isLoading: false,
    });
    mockUseAppMode.mockReturnValue({
      isOss: false,
      isSaas: true,
      isCloud: true,
      isSelfHosted: false,
      isEnterpriseSelfHosted: false,
      isEnterpriseCloud: true,
      appMode: "saas",
      deploymentMode: "cloud",
    });

    getConfigSpy.mockResolvedValue({
      app_mode: "saas",
      posthog_client_key: "test-posthog-key",
      providers_configured: ["github"],
      auth_url: "https://auth.example.com",
      feature_flags: { ...DEFAULT_FEATURE_FLAGS, deployment_mode: "cloud" },
      maintenance_start_time: null,
      recaptcha_site_key: null,
      faulty_models: [],
      error_message: null,
      updated_at: "2024-01-14T10:00:00Z",
      github_app_slug: null,
    });

    renderHomeScreen();

    await screen.findByTestId("home-screen");

    const ctaLink = await screen.findByTestId("homepage-cta-learn-more");
    expect(ctaLink).toBeInTheDocument();
  });

  it("should not show HomepageCTA in OSS mode", async () => {
    useIsAuthedMock.mockReturnValue({
      data: true,
      isLoading: false,
      isFetching: false,
      isError: false,
    });
    useConfigMock.mockReturnValue({
      data: { app_mode: "oss", feature_flags: DEFAULT_FEATURE_FLAGS },
      isLoading: false,
    });
    mockUseAppMode.mockReturnValue({
      isOss: true,
      isSaas: false,
      isCloud: false,
      isSelfHosted: false,
      isEnterpriseSelfHosted: false,
      isEnterpriseCloud: false,
      appMode: "oss",
      deploymentMode: undefined,
    });

    getConfigSpy.mockResolvedValue({
      app_mode: "oss",
      posthog_client_key: "test-posthog-key",
      providers_configured: ["github"],
      auth_url: "https://auth.example.com",
      feature_flags: DEFAULT_FEATURE_FLAGS,
      maintenance_start_time: null,
      recaptcha_site_key: null,
      faulty_models: [],
      error_message: null,
      updated_at: "2024-01-14T10:00:00Z",
      github_app_slug: null,
    });

    renderHomeScreen();

    await screen.findByTestId("home-screen");

    expect(screen.queryByTestId("homepage-cta-learn-more")).not.toBeInTheDocument();
  });

  it("should not show HomepageCTA in SaaS Self-hosted mode", async () => {
    useIsAuthedMock.mockReturnValue({
      data: true,
      isLoading: false,
      isFetching: false,
      isError: false,
    });
    useConfigMock.mockReturnValue({
      data: { app_mode: "saas", feature_flags: { ...DEFAULT_FEATURE_FLAGS, deployment_mode: "self_hosted" } },
      isLoading: false,
    });
    mockUseAppMode.mockReturnValue({
      isOss: false,
      isSaas: true,
      isCloud: false,
      isSelfHosted: true,
      isEnterpriseSelfHosted: true,
      isEnterpriseCloud: false,
      appMode: "saas",
      deploymentMode: "self_hosted",
    });

    getConfigSpy.mockResolvedValue({
      app_mode: "saas",
      posthog_client_key: "test-posthog-key",
      providers_configured: ["github"],
      auth_url: "https://auth.example.com",
      feature_flags: { ...DEFAULT_FEATURE_FLAGS, deployment_mode: "self_hosted" },
      maintenance_start_time: null,
      recaptcha_site_key: null,
      faulty_models: [],
      error_message: null,
      updated_at: "2024-01-14T10:00:00Z",
      github_app_slug: null,
    });

    renderHomeScreen();

    await screen.findByTestId("home-screen");

    expect(screen.queryByTestId("homepage-cta-learn-more")).not.toBeInTheDocument();
  });

});