/**
 * Cloudflare Worker 边缘探针验证（离线，不需要 wrangler）
 *
 * 做法：把 worker.js 与 uptimerobot.js 以 data: URL 动态载入，
 * 注入假的 ASSETS / MONITOR_KV / UptimeRobot 服务器，实测：
 *   [A] UptimeRobot 映射（暂停/离线/可用率/端口目标）
 *   [B] 探测范围（probeScope）与展示口径解耦
 *   [C] UR 同步失败时保留上次数据，绝不误判为离线
 *   [D] 管理端路由（/admin 与 /api/admin/* 一律拒绝，Worker 无可写面）
 *
 * 用法：node scripts/verify-worker.cjs
 */
const fs = require('node:fs');
const http = require('node:http');
const path = require('node:path');

const ROOT = path.join(__dirname, '..');
const EDGE = path.join(ROOT, 'edge', 'cloudflare');
const UR_PORT = 8896;
const HTTP_PORT = 8895;

const results = [];
const check = (name, pass, detail) => {
  results.push({ name, pass });
  console.log(`  ${pass ? '✓' : '✗'} ${name}${detail ? ` — ${detail}` : ''}`);
};
const group = (t) => console.log(`\n${t}`);

const UR_PAYLOAD = {
  stat: 'ok',
  monitors: [
    {
      id: 700001, friendly_name: 'UR-主站', url: 'https://a.example.com', type: 1, status: 2, interval: 300,
      average_response_time: '120',
      response_times: [{ datetime: Math.floor(Date.now() / 1000) - 60, value: '118' }, { datetime: Math.floor(Date.now() / 1000) - 360, value: '130' }],
      custom_uptime_ratio: '100-100-99.980-99.990', custom_down_durations: '0-0-120-260',
      logs: [{ type: 2, datetime: Math.floor(Date.now() / 1000) - 86400 }],
    },
    {
      id: 700002, friendly_name: 'UR-端口', url: 'b.example.com', port: 8443, type: 4, status: 9, interval: 300,
      average_response_time: '0', response_times: [{ datetime: Math.floor(Date.now() / 1000) - 120, value: '0' }],
      custom_uptime_ratio: '98-99-99.5-99.7', custom_down_durations: '300-600-1200-2400',
      logs: [{ type: 1, datetime: Math.floor(Date.now() / 1000) - 120, reason: { code: '503', detail: 'Service Unavailable' } }],
    },
    {
      id: 700003, friendly_name: 'UR-暂停', url: 'https://c.example.com', type: 1, status: 0, interval: 300,
      response_times: [], custom_uptime_ratio: '100-100-100-100', custom_down_durations: '0-0-0-0', logs: [],
    },
  ],
};

// 假 UptimeRobot：正常返回 payload；切到 error 模式返回 stat=fail
let urMode = 'ok';
function startUrServer() {
  return http.createServer((req, res) => {
    let body = '';
    req.on('data', (c) => { body += c; });
    req.on('end', () => {
      res.writeHead(200, { 'content-type': 'application/json' });
      if (urMode === 'fail') return res.end(JSON.stringify({ stat: 'fail', error: { type: 'invalid_parameter', message: 'bad key' } }));
      res.end(JSON.stringify(UR_PAYLOAD));
    });
  });
}

// 载入 Worker：替换 cloudflare:sockets 与 UR 模块的 API 地址
async function loadWorker() {
  let ur = fs.readFileSync(path.join(EDGE, 'uptimerobot.js'), 'utf8');
  ur = ur.replace("const API_URL = 'https://api.uptimerobot.com/v2/getMonitors';", `const API_URL = 'http://localhost:${UR_PORT}/v2/getMonitors';`);
  const urUrl = `data:text/javascript;base64,${Buffer.from(ur).toString('base64')}`;

  let w = fs.readFileSync(path.join(EDGE, 'worker.js'), 'utf8');
  // Workers 专有模块在 Node 下无法加载，替换为抛错桩（测试只覆盖 http 与 UR 路径）
  w = w.replace("import { connect } from 'cloudflare:sockets';", "const connect = () => { throw new Error('TCP unavailable in offline test'); };");
  w = w.replace("import { fetchUptimeRobotMonitors } from './uptimerobot.js';", `import { fetchUptimeRobotMonitors } from '${urUrl}';`);
  return import(`data:text/javascript;base64,${Buffer.from(w).toString('base64')}`);
}

// 内存版 KV + 静态资源夹具
function makeEnv(settings, monitors) {
  const kv = new Map();
  const config = JSON.stringify({ settings, monitors });
  return {
    MONITOR_KV: {
      // 与真实 KV 一致：type='json' 时自动反序列化，否则返回原始字符串
      async get(key, type) {
        const v = kv.get(key);
        if (v == null) return null;
        return type === 'json' ? JSON.parse(v) : v;
      },
      async put(k, v) { kv.set(k, v); },
    },
    ASSETS: {
      // 与真实 Workers 一致：这里收到的是 URL 对象而非 Request
      async fetch(input) {
        const raw = String(input && typeof input.href === 'string' ? input.href : input);
        const pathname = new URL(raw, 'http://placeholder').pathname;
        if (pathname === '/monitors.json') {
          return new Response(config, { headers: { 'content-type': 'application/json' } });
        }
        return new Response('not found', { status: 404 });
      },
    },
    _kv: kv,
  };
}

const LOCAL_TARGETS = [
  { id: 'local-1', name: '本地A', type: 'http', url: `http://127.0.0.1:${HTTP_PORT}/ok`, interval: 60 },
  { id: 'local-2', name: '本地B', type: 'http', url: `http://127.0.0.1:${HTTP_PORT}/ok`, interval: 60 },
];

// 记录哪些 URL 被真正探测过（用于验证探测范围）
let probed = [];
const origFetch = globalThis.fetch;

async function main() {
  const urSrv = startUrServer();
  await new Promise((r) => urSrv.listen(UR_PORT, r));
  const httpSrv = http.createServer((req, res) => { res.writeHead(200); res.end('ok'); });
  await new Promise((r) => httpSrv.listen(HTTP_PORT, r));

  const worker = await loadWorker();
  const { fetchUptimeRobotMonitors } = await import(
    `data:text/javascript;base64,${Buffer.from(
      fs.readFileSync(path.join(EDGE, 'uptimerobot.js'), 'utf8')
        .replace("const API_URL = 'https://api.uptimerobot.com/v2/getMonitors';", `const API_URL = 'http://localhost:${UR_PORT}/v2/getMonitors';`)
    ).toString('base64')}`
  );

  /* ---------- [A] UptimeRobot 映射 ---------- */
  group('[A] UptimeRobot 映射');
  const list = await fetchUptimeRobotMonitors({ apiKey: 'ur-test-key' });
  check('映射出 3 个目标', list.length === 3, list.map((m) => m.name).join('、'));
  check('在线目标延迟取自最新响应样本', list[0].latency === 118, `${list[0].latency}ms`);
  check('离线目标取故障日志 code 作状态码', list[1].code === 503, `code=${list[1].code}`);
  check('离线目标详情带原因', /503 Service Unavailable/.test(list[1].detail), list[1].detail);
  check('暂停目标归为 pending 而非离线', list[2].status === 'pending', list[2].status);
  check('暂停目标提示已暂停', /暂停/.test(list[2].detail), list[2].detail);
  check('90 天可用率按 ratios 顺序解析', list[0].uptimeRatios[90] === 99.99, `${list[0].uptimeRatios[1]}/${list[0].uptimeRatios[7]}/${list[0].uptimeRatios[30]}/${list[0].uptimeRatios[90]}`);
  check('累计离线时长解析正确', list[1].downSeconds[90] === 2400, `${list[1].downSeconds[90]}s`);
  check('端口目标地址带端口号', list[1].url === 'b.example.com:8443', list[1].url);
  check('历史心率按时间升序（供心率图直接绘制）', list[0].history[0].t < list[0].history[1].t, '');
  check('类型标注为来源协议', list[1].sourceLabel === 'PORT', list[1].sourceLabel);
  check('目标 id 加 ur- 前缀（避免与自建 id 冲突）', list.every((m) => m.id.startsWith('ur-')), list.map((m) => m.id).join(','));

  urMode = 'fail';
  let threw = null;
  try { await fetchUptimeRobotMonitors({ apiKey: 'bad' }); } catch (e) { threw = e; }
  check('UR 返回 stat=fail 时抛出可读错误', Boolean(threw) && /UptimeRobot/.test(threw.message), threw?.message);
  urMode = 'ok';

  /* ---------- [B] 探测范围与展示口径解耦 ---------- */
  group('[B] 探测范围（probeScope）与展示口径（dataFilter）解耦');
  const urSettings = (extra = {}) => ({ dataFilter: 'uptimerobot', uptimeRobot: { enabled: true, apiKey: 'ur-k' }, ...extra });

  // 记录探测行为
  globalThis.fetch = async (input, init) => {
    const u = String(input);
    if (u.startsWith(`http://localhost:${UR_PORT}`)) return origFetch(input, init);
    probed.push(u);
    return origFetch(input, init);
  };

  probed = [];
  let env = makeEnv(urSettings(), LOCAL_TARGETS);
  let snap = await worker.__test.runChecks(env);
  const urIds = (s) => Object.keys(s.monitors).filter((k) => k.startsWith('ur-'));
  check('未设 probeScope 时跟随 dataFilter=uptimerobot（不探测本地目标）', probed.length === 0, `探测了 ${probed.length} 个本地目标`);
  check('UR 目标进入快照', urIds(snap).length === 3, `${urIds(snap).length} 个`);
  check('快照带 sources.uptimerobot 同步状态', snap.sources.uptimerobot.ok === true && snap.sources.uptimerobot.count === 3, `count=${snap.sources.uptimerobot.count}`);
  check('快照带 probeScope（面板据此解释口径）', snap.probeScope === 'uptimerobot', snap.probeScope);
  check('统计总数 = 实际参与的目标数（scope=uptimerobot 时只有 3 个 UR）', snap.stats.total === 3, `total=${snap.stats.total}`);
  check('UR 侧口径：在线 1 / 离线 1 / 待检测 1', snap.stats.up === 1 && snap.stats.down === 1 && snap.stats.pending === 1, `up=${snap.stats.up} down=${snap.stats.down} pending=${snap.stats.pending}`);
  const urState = snap.monitors['ur-700001'];
  check('UR 目标带 meta（面板靠它区分自建/外部）', urState.meta?.source === 'uptimerobot' && urState.meta.name === 'UR-主站', JSON.stringify(urState.meta).slice(0, 70));
  check('UR 目标带 uptimeRatios（面板算官方可用率用）', urState.uptimeRatios?.[90] === 99.99, `${urState.uptimeRatios?.[90]}`);
  check('UR 目标有 daily 分桶（本探针自行累积）', urState.daily && Object.keys(urState.daily).length > 0, Object.keys(urState.daily)[0]);

  probed = [];
  snap = await worker.__test.runChecks(makeEnv(urSettings({ probeScope: 'all' }), LOCAL_TARGETS));
  check('显式 probeScope=all 时探测本地目标', probed.length === 2, `探测了 ${probed.length} 个`);
  check('probeScope=all 时 UR 目标同样在快照中', urIds(snap).length === 3, '');

  probed = [];
  snap = await worker.__test.runChecks(makeEnv(urSettings({ probeScope: 'config' }), LOCAL_TARGETS));
  check('probeScope=config 时不拉 UR 也不展示 UR 目标', urIds(snap).length === 0 && probed.length === 2, `UR=${urIds(snap).length} 本地探测=${probed.length}`);

  probed = [];
  snap = await worker.__test.runChecks(makeEnv(urSettings({ uptimeRobot: { enabled: false, apiKey: '' } }), LOCAL_TARGETS));
  check('UR 未启用时不拉取', urIds(snap).length === 0 && probed.length === 0, `UR=${urIds(snap).length} 本地探测=${probed.length}`);

  /* ---------- [C] UR 同步失败的降级行为 ---------- */
  group('[C] UR 同步失败时保留上次数据（绝不误判为离线）');
  const envC = makeEnv(urSettings(), LOCAL_TARGETS);
  await worker.__test.runChecks(envC); // 先成功一轮，把 UR 数据写进 KV
  urMode = 'fail';
  snap = await worker.__test.runChecks(envC);
  check('同步失败时标记 ok=false 并给出原因', snap.sources.uptimerobot.ok === false && /UptimeRobot/.test(snap.sources.uptimerobot.error), snap.sources.uptimerobot.error);
  check('同步失败时 UR 目标仍在快照里（用上次数据）', urIds(snap).length === 3, `${urIds(snap).length} 个`);
  check('同步失败时 UR 目标状态未被改成 offline', snap.monitors['ur-700002'].status === 'down', `仍是上次的 ${snap.monitors['ur-700002'].status}（真实状态）`);
  urMode = 'ok';

  /* ---------- [D] 管理端路由 ---------- */
  group('[D] 管理端：Worker 侧无可写面');
  // 真实运行时会用 ctx.waitUntil 托管后台任务，测试里同步执行以便断言生效
  const pending = [];
  const call = (pathname) => worker.default.fetch(new Request(`https://x${pathname}`), makeEnv(urSettings(), LOCAL_TARGETS), { waitUntil(p) { pending.push(p); } });
  await Promise.all(pending.map((p) => p.catch(() => {})));

  const adminPage = await call('/admin');
  const adminBody = await adminPage.json();
  check('/admin 返回 403（而非 404，提示去哪找管理端）', adminPage.status === 403, `HTTP ${adminPage.status}`);
  check('/admin 的提示指向本地 Node 探针', /docs\/DEPLOYMENT\.md|本地 Node/.test(adminBody.hint), adminBody.hint?.slice(0, 50));
  const adminApi = await call('/api/admin/overview');
  check('/api/admin/* 一律 403', adminApi.status === 403 && (await adminApi.json()).error === 'admin-not-here', `HTTP ${adminApi.status}`);
  const adminStatus = await call('/api/admin/status');
  check('未绑定的 2FA 状态接口在 Worker 上也不开放', adminStatus.status === 403, `HTTP ${adminStatus.status}`);

  const panel = await call('/');
  check('面板本身不受影响', panel.status === 404 || panel.status === 200, `静态资源响应 HTTP ${panel.status}（夹具无 /index.html，属预期）`);
  const st = await call('/api/status');
  const stBody = await st.json();
  check('/api/status 正常提供（首次无数据时返回空 state 并后台补跑）', st.status === 200 && typeof stBody === 'object' && stBody.monitors !== undefined, `HTTP ${st.status}，monitors=${stBody.monitors ? Object.keys(stBody.monitors).length : '无'}`);
  check('首次访问触发后台探测（waitUntil 被调用）', pending.length > 0, `${pending.length} 个后台任务`);

  globalThis.fetch = origFetch;
  urSrv.close();
  httpSrv.close();

  const failed = results.filter((x) => !x.pass);
  console.log(`\n结果：${results.length - failed.length}/${results.length} 通过`);
  if (failed.length) {
    console.log('失败项：');
    for (const f of failed) console.log(`  ✗ ${f.name}`);
    process.exit(1);
  }
}

main().catch((err) => {
  console.error('FAILED:', err.stack || err.message);
  process.exit(1);
});