import { describe, it, expect, beforeEach, vi } from 'vitest';
import { addItem } from '../push/queue.js';
import { processQueue } from '../push/worker.js';

const DB_NAME = 'inquiry_push';

async function dumpAll() {
  // Bypass getPending (which filters by status/nextRetry) to inspect raw rows.
  return new Promise((resolve, reject) => {
    const req = indexedDB.open(DB_NAME);
    req.onsuccess = () => {
      const db = req.result;
      const tx = db.transaction('queue', 'readonly').objectStore('queue').getAll();
      tx.onsuccess = () => { db.close(); resolve(tx.result); };
      tx.onerror = () => { db.close(); reject(tx.error); };
    };
    req.onerror = () => reject(req.error);
  });
}

// worker 无状态:每次 processQueue 自己从 chrome.storage 读配置(模拟已保存的启用配置)。
// 不再用 configure() 注入 —— 模块级配置会在 SW 休眠重启后丢失(正是 B 的根因)。
function mockStorage(config) {
  globalThis.chrome = {
    storage: { local: { get: vi.fn().mockResolvedValue({ push_config: config }) } },
  };
}

beforeEach(async () => {
  const dbs = (await indexedDB.databases?.().catch(() => null)) || [];
  const names = dbs.length ? dbs.map(d => d.name) : [DB_NAME];
  await Promise.all(names.map(name => new Promise(r => {
    if (!name) { r(); return; }
    const req = indexedDB.deleteDatabase(name);
    req.onsuccess = req.onerror = req.onblocked = () => r();
  })));
  mockStorage({ enabled: true, serverUrl: 'http://test', token: 'tok' });
});

describe('worker', () => {
  it('pushes when SW resumed without configure() — reads config from storage (regression for B)', async () => {
    // SW 休眠重启后模块级配置丢失;worker 必须自己从 storage 读,不能依赖 configure()。
    // beforeEach 已 mock 启用配置,此处故意不调 configure —— 复现并锁定 B 的修复。
    globalThis.fetch = vi.fn().mockResolvedValue({ ok: true, status: 200 });
    await addItem({
      payload: {
        record: {
          inquiryId: 'X',
          createTimeFromApi: '2026-01-01T00:00:00Z',
          updateTimeFromApi: '2026-01-01T00:00:00Z',
        },
        messages: [],
      },
      inquiryId: 'X',
    });
    const r = await processQueue();
    expect(r.processed).toBe(1);
    expect(globalThis.fetch).toHaveBeenCalledTimes(1);
  });

  it('POSTs pending, marks sent on 200', async () => {
    const fetchMock = vi.fn().mockResolvedValue({ ok: true, status: 200 });
    globalThis.fetch = fetchMock;
    const id = await addItem({
      payload: {
        record: {
          inquiryId: 'X',
          createTimeFromApi: '2026-01-01T00:00:00Z',
          updateTimeFromApi: '2026-01-01T00:00:00Z',
        },
        messages: [
          {
            messageId: 'm1',
            sendTime: '2026-01-01T00:00:00Z',
            direction: 'outgoing',
            content: 'c',
          },
        ],
      },
      inquiryId: 'X',
    });
    const r = await processQueue();
    expect(r.processed).toBe(1);
    expect(fetchMock).toHaveBeenCalledTimes(1);
    expect(fetchMock.mock.calls[0][0]).toBe('http://test/api/ingest');
    const all = await dumpAll();
    expect(all.find(x => x.id === id).status).toBe('sent');
  });

  it('successful push counts as sent in getStats (not silently removed)', async () => {
    // 显示 bug 回归:成功推送的记录必须能在 getStats 里看到(sent),
    // 否则 popup 永远显示"已推 0"(旧实现成功即 remove → 统计不到)。
    globalThis.fetch = vi.fn().mockResolvedValue({ ok: true, status: 200 });
    await addItem({
      payload: {
        record: {
          inquiryId: 'X',
          createTimeFromApi: '2026-01-01T00:00:00Z',
          updateTimeFromApi: '2026-01-01T00:00:00Z',
        },
        messages: [],
      },
      inquiryId: 'X',
    });
    await processQueue();
    const { getStats } = await import('../push/queue.js');
    const stats = await getStats();
    expect(stats.sent).toBe(1);
  });

  it('on failure, retries++ and nextRetry in future', async () => {
    globalThis.fetch = vi.fn().mockRejectedValue(new Error('network'));
    const id = await addItem({
      payload: {
        record: {
          inquiryId: 'X',
          createTimeFromApi: '2026-01-01T00:00:00Z',
          updateTimeFromApi: '2026-01-01T00:00:00Z',
        },
        messages: [
          {
            messageId: 'm',
            sendTime: '2026-01-01T00:00:00Z',
            direction: 'outgoing',
            content: 'c',
          },
        ],
      },
      inquiryId: 'X',
    });
    await processQueue();
    const all = await dumpAll();
    const item = all.find(x => x.id === id);
    expect(item.status).toBe('pending');
    expect(item.retries).toBe(1);
    expect(item.nextRetry).toBeGreaterThan(Date.now());
  });

  it('after MAX_RETRIES, mark failed', async () => {
    globalThis.fetch = vi.fn().mockRejectedValue(new Error('network'));
    const id = await addItem({
      payload: {
        record: {
          inquiryId: 'X',
          createTimeFromApi: '2026-01-01T00:00:00Z',
          updateTimeFromApi: '2026-01-01T00:00:00Z',
        },
        messages: [
          {
            messageId: 'm',
            sendTime: '2026-01-01T00:00:00Z',
            direction: 'outgoing',
            content: 'c',
          },
        ],
      },
      inquiryId: 'X',
    });
    // Pre-seed retries=7 so one more failure pushes it to 8 -> failed.
    const { markStatus } = await import('../push/queue.js');
    await markStatus(id, 'pending', { retries: 7, nextRetry: 0 });
    await processQueue();
    const all = await dumpAll();
    const item = all.find(x => x.id === id);
    expect(item.status).toBe('failed');
  });
});