import fs from "node:fs";
import path from "node:path";
import { describe, expect, it } from "vitest";
import { withTempDir } from "../test-helpers/temp-dir.js";
import {
  ackSessionDelivery,
  enqueueSessionDelivery,
  failSessionDelivery,
  loadPendingSessionDeliveries,
  resolveSessionDeliveryQueueDir,
} from "./session-delivery-queue.js";

describe("session-delivery queue storage", () => {
  it("dedupes entries when an idempotency key is reused", async () => {
    await withTempDir({ prefix: "openclaw-session-delivery-" }, async (tempDir) => {
      const firstId = await enqueueSessionDelivery(
        {
          kind: "agentTurn",
          sessionKey: "agent:main:main",
          message: "continue after restart",
          messageId: "restart-sentinel:agent:main:main:agentTurn:123",
          idempotencyKey: "restart-sentinel:agent:main:main:agentTurn:123",
        },
        tempDir,
      );
      const secondId = await enqueueSessionDelivery(
        {
          kind: "agentTurn",
          sessionKey: "agent:main:main",
          message: "continue after restart",
          messageId: "restart-sentinel:agent:main:main:agentTurn:123",
          idempotencyKey: "restart-sentinel:agent:main:main:agentTurn:123",
        },
        tempDir,
      );

      expect(secondId).toBe(firstId);
      expect(await loadPendingSessionDeliveries(tempDir)).toHaveLength(1);
    });
  });

  it("persists retry metadata and removes acked entries", async () => {
    await withTempDir({ prefix: "openclaw-session-delivery-" }, async (tempDir) => {
      const id = await enqueueSessionDelivery(
        {
          kind: "systemEvent",
          sessionKey: "agent:main:main",
          text: "restart complete",
        },
        tempDir,
      );

      await failSessionDelivery(id, "dispatch failed", tempDir);
      const [failedEntry] = await loadPendingSessionDeliveries(tempDir);
      expect(failedEntry?.retryCount).toBe(1);
      expect(failedEntry?.lastError).toBe("dispatch failed");

      await ackSessionDelivery(id, tempDir);
      expect(await loadPendingSessionDeliveries(tempDir)).toStrictEqual([]);
    });
  });

  it("cleans up orphaned temporary queue files during load", async () => {
    await withTempDir({ prefix: "openclaw-session-delivery-" }, async (tempDir) => {
      await enqueueSessionDelivery(
        {
          kind: "systemEvent",
          sessionKey: "agent:main:main",
          text: "restart complete",
        },
        tempDir,
      );
      const tmpPath = path.join(resolveSessionDeliveryQueueDir(tempDir), "orphan-entry.tmp");
      fs.writeFileSync(tmpPath, "stale tmp");
      const staleAt = new Date(Date.now() - 60_000);
      fs.utimesSync(tmpPath, staleAt, staleAt);

      await loadPendingSessionDeliveries(tempDir);

      expect(fs.existsSync(tmpPath)).toBe(false);
    });
  });

  it("keeps fresh temporary queue files while a write may still be in flight", async () => {
    await withTempDir({ prefix: "openclaw-session-delivery-" }, async (tempDir) => {
      const tmpPath = path.join(resolveSessionDeliveryQueueDir(tempDir), "active-entry.tmp");
      fs.mkdirSync(path.dirname(tmpPath), { recursive: true });
      fs.writeFileSync(tmpPath, "active tmp");

      await loadPendingSessionDeliveries(tempDir);

      expect(fs.existsSync(tmpPath)).toBe(true);
    });
  });
});