/** 轮询工作者:每 tick 调 pollDue;上一 tick 没跑完就跳过这一拍;出错的账号写 stderr;stop 后不再跑 */
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import type { MailPollOutcome } from '@contracts';
import { pollMailOnce, startMailPoller } from '../workers/mail-poller.ts';

function fakeMail(outcomes: MailPollOutcome[], holdMs = 0) {
  const calls: Date[] = [];
  return {
    calls,
    mail: {
      pollDue: async (now: Date) => {
        calls.push(now);
        if (holdMs > 0) await new Promise((r) => setTimeout(r, holdMs));
        return outcomes;
      },
    },
  };
}

describe('pollMailOnce', () => {
  it('回用例的结果;出错的账号写一行 stderr', async () => {
    const write = vi.spyOn(process.stderr, 'write').mockImplementation(() => true);
    const { mail } = fakeMail([{ accountId: 'a', pulled: 1, stored: 1, dispatched: 1, more: false }, { accountId: 'b', pulled: 0, stored: 0, dispatched: 0, more: false, error: '连不上' }]);
    const out = await pollMailOnce({ container: { mail: mail as never } });
    expect(out).toHaveLength(2);
    expect(write).toHaveBeenCalledWith(expect.stringContaining('[mail-poller] b:连不上'));
    write.mockRestore();
  });
});

describe('startMailPoller', () => {
  beforeEach(() => vi.useFakeTimers());
  afterEach(() => vi.useRealTimers());

  it('按 tick 调;在跑时跳过;stop 后停', async () => {
    const { mail, calls } = fakeMail([], 1000);
    const poller = startMailPoller({ container: { mail: mail as never } }, 100);
    await vi.advanceTimersByTimeAsync(350);
    expect(calls).toHaveLength(1); // 第一拍 1000ms 没跑完,后面两拍跳过
    await vi.advanceTimersByTimeAsync(1000);
    expect(calls.length).toBeGreaterThanOrEqual(2);
    poller.stop();
    const before = calls.length;
    await vi.advanceTimersByTimeAsync(2000);
    expect(calls).toHaveLength(before);
  });
});