import { beforeAll, describe, expect, it, vi } from "vitest";
import { escapeRegExp, formatEnvelopeTimestamp } from "../../test/helpers/envelope-timestamp.js";
import {
  installWebAutoReplyTestHomeHooks,
  installWebAutoReplyUnitTestHooks,
  makeSessionStore,
  setLoadConfigMock,
} from "./auto-reply.test-harness.js";

installWebAutoReplyTestHomeHooks();

describe("web auto-reply", () => {
  installWebAutoReplyUnitTestHooks();

  // Ensure test-harness `vi.mock(...)` hooks are registered before importing the module under test.
  let monitorWebChannel: typeof import("./auto-reply.js").monitorWebChannel;
  beforeAll(async () => {
    ({ monitorWebChannel } = await import("./auto-reply.js"));
  });

  it("handles helper envelope timestamps with trimmed timezones (regression)", () => {
    const d = new Date("2025-01-01T00:00:00.000Z");
    expect(() => formatEnvelopeTimestamp(d, " America/Los_Angeles ")).not.toThrow();
  });

  it("reconnects after a connection close", async () => {
    const closeResolvers: Array<() => void> = [];
    const sleep = vi.fn(async () => {});
    const listenerFactory = vi.fn(async () => {
      let _resolve!: () => void;
      const onClose = new Promise<void>((res) => {
        _resolve = res;
        closeResolvers.push(res);
      });
      return { close: vi.fn(), onClose };
    });
    const runtime = {
      log: vi.fn(),
      error: vi.fn(),
      exit: vi.fn(),
    };
    const controller = new AbortController();
    const run = monitorWebChannel(
      false,
      listenerFactory,
      true,
      async () => ({ text: "ok" }),
      runtime as never,
      controller.signal,
      {
        heartbeatSeconds: 1,
        reconnect: { initialMs: 10, maxMs: 10, maxAttempts: 3, factor: 1.1 },
        sleep,
      },
    );

    await Promise.resolve();
    expect(listenerFactory).toHaveBeenCalledTimes(1);

    closeResolvers[0]?.();
    const waitForSecondCall = async () => {
      const started = Date.now();
      while (listenerFactory.mock.calls.length < 2 && Date.now() - started < 200) {
        await new Promise((resolve) => setTimeout(resolve, 10));
      }
    };
    await waitForSecondCall();
    expect(listenerFactory).toHaveBeenCalledTimes(2);
    expect(runtime.error).toHaveBeenCalledWith(expect.stringContaining("Retry 1"));

    controller.abort();
    closeResolvers[1]?.();
    await new Promise((resolve) => setTimeout(resolve, 5));
    await run;
  });
  it("forces reconnect when watchdog closes without onClose", async () => {
    vi.useFakeTimers();
    try {
      const sleep = vi.fn(async () => {});
      const closeResolvers: Array<(reason: unknown) => void> = [];
      let capturedOnMessage:
        | ((msg: import("./inbound.js").WebInboundMessage) => Promise<void>)
        | undefined;
      const listenerFactory = vi.fn(
        async (opts: {
          onMessage: (msg: import("./inbound.js").WebInboundMessage) => Promise<void>;
        }) => {
          capturedOnMessage = opts.onMessage;
          let resolveClose: (reason: unknown) => void = () => {};
          const onClose = new Promise<unknown>((res) => {
            resolveClose = res;
            closeResolvers.push(res);
          });
          return {
            close: vi.fn(),
            onClose,
            signalClose: (reason?: unknown) => resolveClose(reason),
          };
        },
      );
      const runtime = {
        log: vi.fn(),
        error: vi.fn(),
        exit: vi.fn(),
      };
      const controller = new AbortController();
      const run = monitorWebChannel(
        false,
        listenerFactory,
        true,
        async () => ({ text: "ok" }),
        runtime as never,
        controller.signal,
        {
          heartbeatSeconds: 1,
          reconnect: { initialMs: 10, maxMs: 10, maxAttempts: 3, factor: 1.1 },
          sleep,
        },
      );

      await Promise.resolve();
      expect(listenerFactory).toHaveBeenCalledTimes(1);

      const reply = vi.fn().mockResolvedValue(undefined);
      const sendComposing = vi.fn();
      const sendMedia = vi.fn();

      // The watchdog only needs `lastMessageAt` to be set. Don't await full message
      // processing here since it can schedule timers and become flaky under load.
      void capturedOnMessage?.({
        body: "hi",
        from: "+1",
        to: "+2",
        id: "m1",
        sendComposing,
        reply,
        sendMedia,
      });

      await vi.advanceTimersByTimeAsync(31 * 60 * 1000);
      await Promise.resolve();

      await vi.advanceTimersByTimeAsync(1);
      await Promise.resolve();
      expect(listenerFactory).toHaveBeenCalledTimes(2);

      controller.abort();
      closeResolvers[1]?.({ status: 499, isLoggedOut: false });
      await Promise.resolve();
      await run;
    } finally {
      vi.useRealTimers();
    }
  }, 15_000);

  it("stops after hitting max reconnect attempts", { timeout: 60_000 }, async () => {
    const closeResolvers: Array<() => void> = [];
    const sleep = vi.fn(async () => {});
    const listenerFactory = vi.fn(async () => {
      const onClose = new Promise<void>((res) => closeResolvers.push(res));
      return { close: vi.fn(), onClose };
    });
    const runtime = {
      log: vi.fn(),
      error: vi.fn(),
      exit: vi.fn(),
    };

    const run = monitorWebChannel(
      false,
      listenerFactory,
      true,
      async () => ({ text: "ok" }),
      runtime as never,
      undefined,
      {
        heartbeatSeconds: 1,
        reconnect: { initialMs: 5, maxMs: 5, maxAttempts: 2, factor: 1.1 },
        sleep,
      },
    );

    await Promise.resolve();
    expect(listenerFactory).toHaveBeenCalledTimes(1);

    closeResolvers.shift()?.();
    await new Promise((resolve) => setTimeout(resolve, 15));
    expect(listenerFactory).toHaveBeenCalledTimes(2);

    closeResolvers.shift()?.();
    await new Promise((resolve) => setTimeout(resolve, 15));
    await run;

    expect(runtime.error).toHaveBeenCalledWith(expect.stringContaining("max attempts reached"));
  });

  it("processes inbound messages without batching and preserves timestamps", async () => {
    const originalTz = process.env.TZ;
    process.env.TZ = "Europe/Vienna";

    const originalMax = process.getMaxListeners();
    process.setMaxListeners?.(1); // force low to confirm bump

    const store = await makeSessionStore({
      main: { sessionId: "sid", updatedAt: Date.now() },
    });

    try {
      const sendMedia = vi.fn();
      const reply = vi.fn().mockResolvedValue(undefined);
      const sendComposing = vi.fn();
      const resolver = vi.fn().mockResolvedValue({ text: "ok" });

      let capturedOnMessage:
        | ((msg: import("./inbound.js").WebInboundMessage) => Promise<void>)
        | undefined;
      const listenerFactory = async (opts: {
        onMessage: (msg: import("./inbound.js").WebInboundMessage) => Promise<void>;
      }) => {
        capturedOnMessage = opts.onMessage;
        return { close: vi.fn() };
      };

      setLoadConfigMock(() => ({
        agents: {
          defaults: {
            envelopeTimezone: "utc",
          },
        },
        session: { store: store.storePath },
      }));

      await monitorWebChannel(false, listenerFactory, false, resolver);
      expect(capturedOnMessage).toBeDefined();

      // Two messages from the same sender with fixed timestamps
      await capturedOnMessage?.({
        body: "first",
        from: "+1",
        to: "+2",
        id: "m1",
        timestamp: 1735689600000, // Jan 1 2025 00:00:00 UTC
        sendComposing,
        reply,
        sendMedia,
      });
      await capturedOnMessage?.({
        body: "second",
        from: "+1",
        to: "+2",
        id: "m2",
        timestamp: 1735693200000, // Jan 1 2025 01:00:00 UTC
        sendComposing,
        reply,
        sendMedia,
      });

      expect(resolver).toHaveBeenCalledTimes(2);
      const firstArgs = resolver.mock.calls[0][0];
      const secondArgs = resolver.mock.calls[1][0];
      const firstTimestamp = formatEnvelopeTimestamp(new Date("2025-01-01T00:00:00Z"));
      const secondTimestamp = formatEnvelopeTimestamp(new Date("2025-01-01T01:00:00Z"));
      const firstPattern = escapeRegExp(firstTimestamp);
      const secondPattern = escapeRegExp(secondTimestamp);
      expect(firstArgs.Body).toMatch(
        new RegExp(`\\[WhatsApp \\+1 (\\+\\d+[smhd] )?${firstPattern}\\] \\[openclaw\\] first`),
      );
      expect(firstArgs.Body).not.toContain("second");
      expect(secondArgs.Body).toMatch(
        new RegExp(`\\[WhatsApp \\+1 (\\+\\d+[smhd] )?${secondPattern}\\] \\[openclaw\\] second`),
      );
      expect(secondArgs.Body).not.toContain("first");

      // Max listeners bumped to avoid warnings in multi-instance test runs
      expect(process.getMaxListeners?.()).toBeGreaterThanOrEqual(50);
    } finally {
      process.setMaxListeners?.(originalMax);
      process.env.TZ = originalTz;
      await store.cleanup();
    }
  });
});
