import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";

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

vi.mock("./client.js", () => ({
  createFeishuClient: createFeishuClientMock,
}));

import { FEISHU_PROBE_REQUEST_TIMEOUT_MS, probeFeishu, clearProbeCache } from "./probe.js";

function makeRequestFn(response: Record<string, unknown>) {
  return vi.fn().mockResolvedValue(response);
}

function setupClient(response: Record<string, unknown>) {
  const requestFn = makeRequestFn(response);
  createFeishuClientMock.mockReturnValue({ request: requestFn });
  return requestFn;
}

describe("probeFeishu", () => {
  beforeEach(() => {
    clearProbeCache();
    vi.restoreAllMocks();
  });

  afterEach(() => {
    clearProbeCache();
  });

  it("returns error when credentials are missing", async () => {
    const result = await probeFeishu();
    expect(result).toEqual({ ok: false, error: "missing credentials (appId, appSecret)" });
  });

  it("returns error when appId is missing", async () => {
    const result = await probeFeishu({ appSecret: "secret" } as never);
    expect(result).toEqual({ ok: false, error: "missing credentials (appId, appSecret)" });
  });

  it("returns error when appSecret is missing", async () => {
    const result = await probeFeishu({ appId: "cli_123" } as never);
    expect(result).toEqual({ ok: false, error: "missing credentials (appId, appSecret)" });
  });

  it("returns bot info on successful probe", async () => {
    const requestFn = setupClient({
      code: 0,
      bot: { bot_name: "TestBot", open_id: "ou_abc123" },
    });

    const result = await probeFeishu({ appId: "cli_123", appSecret: "secret" });
    expect(result).toEqual({
      ok: true,
      appId: "cli_123",
      botName: "TestBot",
      botOpenId: "ou_abc123",
    });
    expect(requestFn).toHaveBeenCalledTimes(1);
  });

  it("uses explicit timeout for bot info request", async () => {
    const requestFn = setupClient({
      code: 0,
      bot: { bot_name: "TestBot", open_id: "ou_abc123" },
    });

    await probeFeishu({ appId: "cli_123", appSecret: "secret" });

    expect(requestFn).toHaveBeenCalledWith(
      expect.objectContaining({
        method: "GET",
        url: "/open-apis/bot/v3/info",
        timeout: FEISHU_PROBE_REQUEST_TIMEOUT_MS,
      }),
    );
  });

  it("returns timeout error when request exceeds timeout", async () => {
    vi.useFakeTimers();
    try {
      const requestFn = vi.fn().mockImplementation(() => new Promise(() => {}));
      createFeishuClientMock.mockReturnValue({ request: requestFn });

      const promise = probeFeishu({ appId: "cli_123", appSecret: "secret" }, { timeoutMs: 1_000 });
      await vi.advanceTimersByTimeAsync(1_000);
      const result = await promise;

      expect(result).toMatchObject({ ok: false, error: "probe timed out after 1000ms" });
    } finally {
      vi.useRealTimers();
    }
  });

  it("returns aborted when abort signal is already aborted", async () => {
    createFeishuClientMock.mockClear();
    const abortController = new AbortController();
    abortController.abort();

    const result = await probeFeishu(
      { appId: "cli_123", appSecret: "secret" },
      { abortSignal: abortController.signal },
    );

    expect(result).toMatchObject({ ok: false, error: "probe aborted" });
    expect(createFeishuClientMock).not.toHaveBeenCalled();
  });

  it("returns cached result on subsequent calls within TTL", async () => {
    const requestFn = setupClient({
      code: 0,
      bot: { bot_name: "TestBot", open_id: "ou_abc123" },
    });

    const creds = { appId: "cli_123", appSecret: "secret" };
    const first = await probeFeishu(creds);
    const second = await probeFeishu(creds);

    expect(first).toEqual(second);
    // Only one API call should have been made
    expect(requestFn).toHaveBeenCalledTimes(1);
  });

  it("makes a fresh API call after cache expires", async () => {
    vi.useFakeTimers();
    try {
      const requestFn = setupClient({
        code: 0,
        bot: { bot_name: "TestBot", open_id: "ou_abc123" },
      });

      const creds = { appId: "cli_123", appSecret: "secret" };
      await probeFeishu(creds);
      expect(requestFn).toHaveBeenCalledTimes(1);

      // Advance time past the 10-minute TTL
      vi.advanceTimersByTime(10 * 60 * 1000 + 1);

      await probeFeishu(creds);
      expect(requestFn).toHaveBeenCalledTimes(2);
    } finally {
      vi.useRealTimers();
    }
  });

  it("does not cache failed probe results (API error)", async () => {
    const requestFn = makeRequestFn({ code: 99, msg: "token expired" });
    createFeishuClientMock.mockReturnValue({ request: requestFn });

    const creds = { appId: "cli_123", appSecret: "secret" };
    const first = await probeFeishu(creds);
    expect(first).toMatchObject({ ok: false, error: "API error: token expired" });

    // Second call should make a fresh request since failures are not cached
    await probeFeishu(creds);
    expect(requestFn).toHaveBeenCalledTimes(2);
  });

  it("does not cache results when request throws", async () => {
    const requestFn = vi.fn().mockRejectedValue(new Error("network error"));
    createFeishuClientMock.mockReturnValue({ request: requestFn });

    const creds = { appId: "cli_123", appSecret: "secret" };
    const first = await probeFeishu(creds);
    expect(first).toMatchObject({ ok: false, error: "network error" });

    await probeFeishu(creds);
    expect(requestFn).toHaveBeenCalledTimes(2);
  });

  it("caches per account independently", async () => {
    const requestFn = setupClient({
      code: 0,
      bot: { bot_name: "Bot1", open_id: "ou_1" },
    });

    await probeFeishu({ appId: "cli_aaa", appSecret: "s1" });
    expect(requestFn).toHaveBeenCalledTimes(1);

    // Different appId should trigger a new API call
    await probeFeishu({ appId: "cli_bbb", appSecret: "s2" });
    expect(requestFn).toHaveBeenCalledTimes(2);

    // Same appId + appSecret as first call should return cached
    await probeFeishu({ appId: "cli_aaa", appSecret: "s1" });
    expect(requestFn).toHaveBeenCalledTimes(2);
  });

  it("does not share cache between accounts with same appId but different appSecret", async () => {
    const requestFn = setupClient({
      code: 0,
      bot: { bot_name: "Bot1", open_id: "ou_1" },
    });

    // First account with appId + secret A
    await probeFeishu({ appId: "cli_shared", appSecret: "secret_aaa" });
    expect(requestFn).toHaveBeenCalledTimes(1);

    // Second account with same appId but different secret (e.g. after rotation)
    // must NOT reuse the cached result
    await probeFeishu({ appId: "cli_shared", appSecret: "secret_bbb" });
    expect(requestFn).toHaveBeenCalledTimes(2);
  });

  it("uses accountId for cache key when available", async () => {
    const requestFn = setupClient({
      code: 0,
      bot: { bot_name: "Bot1", open_id: "ou_1" },
    });

    // Two accounts with same appId+appSecret but different accountIds are cached separately
    await probeFeishu({ accountId: "acct-1", appId: "cli_123", appSecret: "secret" });
    expect(requestFn).toHaveBeenCalledTimes(1);

    await probeFeishu({ accountId: "acct-2", appId: "cli_123", appSecret: "secret" });
    expect(requestFn).toHaveBeenCalledTimes(2);

    // Same accountId should return cached
    await probeFeishu({ accountId: "acct-1", appId: "cli_123", appSecret: "secret" });
    expect(requestFn).toHaveBeenCalledTimes(2);
  });

  it("clearProbeCache forces fresh API call", async () => {
    const requestFn = setupClient({
      code: 0,
      bot: { bot_name: "TestBot", open_id: "ou_abc123" },
    });

    const creds = { appId: "cli_123", appSecret: "secret" };
    await probeFeishu(creds);
    expect(requestFn).toHaveBeenCalledTimes(1);

    clearProbeCache();

    await probeFeishu(creds);
    expect(requestFn).toHaveBeenCalledTimes(2);
  });

  it("handles response.data.bot fallback path", async () => {
    setupClient({
      code: 0,
      data: { bot: { bot_name: "DataBot", open_id: "ou_data" } },
    });

    const result = await probeFeishu({ appId: "cli_123", appSecret: "secret" });
    expect(result).toEqual({
      ok: true,
      appId: "cli_123",
      botName: "DataBot",
      botOpenId: "ou_data",
    });
  });
});