'use strict';
/**
 * 第二步验收：分组渲染 / 折叠 / 搜索过滤 / 筛选提示条。
 * 走 CDP 打开真实页面，注入一份候选数据（Photon 公共实例不稳，不依赖它），
 * 然后核对 DOM 结构并截图到 preview/。
 */
const { spawn } = require('child_process');
const fs = require('fs');
const path = require('path');

const OUT = path.join(__dirname, '..', 'preview');
const BASE = process.env.BASE || 'http://127.0.0.1:8787';
const CHROME = 'C:/Program Files/Google/Chrome/Application/chrome.exe';
const PORT = 9345;

function sleep(ms) { return new Promise((r) => setTimeout(r, ms)); }

class CDP {
  constructor(ws) { this.ws = ws; this.id = 0; this.waits = new Map(); }
  static async connect(url) {
    const ws = new WebSocket(url);
    await new Promise((res, rej) => { ws.onopen = res; ws.onerror = rej; });
    const c = new CDP(ws);
    ws.onmessage = (e) => {
      const m = JSON.parse(e.data);
      if (m.id && c.waits.has(m.id)) { c.waits.get(m.id)(m); c.waits.delete(m.id); }
    };
    return c;
  }
  send(method, params = {}, sessionId) {
    const id = ++this.id;
    return new Promise((res) => {
      this.waits.set(id, res);
      this.ws.send(JSON.stringify({ id, method, params, sessionId }));
    });
  }
}

async function getWsUrl() {
  const res = await fetch(`http://127.0.0.1:${PORT}/json/version`);
  return (await res.json()).webSocketDebuggerUrl;
}

(async () => {
  // 启动 headless Chrome（带调试端口）
  const chrome = spawn(CHROME, [
    '--headless=new', '--disable-gpu', '--hide-scrollbars',
    `--remote-debugging-port=${PORT}`,
    '--user-data-dir=' + path.join(require('os').tmpdir(), 'tripverify' + Date.now()),
    'about:blank',
  ], { stdio: 'ignore' });

  let wsUrl = null;
  for (let i = 0; i < 30 && !wsUrl; i += 1) {
    await sleep(500);
    try { wsUrl = await getWsUrl(); } catch (e) { /* 还没起来 */ }
  }
  if (!wsUrl) { console.error('chrome 未启动'); process.exit(1); }

  const browser = await CDP.connect(wsUrl);
  const { result: { targetId } } = await browser.send('Target.createTarget', { url: 'about:blank' });
  const { result: { sessionId } } = await browser.send('Target.attachToTarget', { targetId, flatten: true });
  const S = (m, p) => browser.send(m, p, sessionId);

  await S('Page.enable');
  await S('Runtime.enable');
  await S('Emulation.setDeviceMetricsOverride', { width: 1280, height: 1400, deviceScaleFactor: 1, mobile: false });
  await S('Page.navigate', { url: BASE });
  await sleep(2500);

  const evalJs = async (expr) => {
    const r = await S('Runtime.evaluate', { expression: expr, awaitPromise: true, returnByValue: true });
    if (r.result?.exceptionDetails) throw new Error(JSON.stringify(r.result.exceptionDetails).slice(0, 400));
    return r.result?.result?.value;
  };

  // 注入候选数据（覆盖三个地名的多个景点），直接驱动 renderCards
  await evalJs(`(() => {
    const mk = (id, name, place, placeKey, placeDetail, score, km, kind) => ({
      id, name, kind, place, placeKey, placeDetail, score, verdict: score >= 60 ? '推荐' : '可考虑',
      distanceKm: km, bearingDeg: 45, tags: ['自然风光'], region: '',
      breakdown: { weather: 20, time: 20, interest: 10 },
      reasons: ['风景好'], warnings: [],
      weather: { summary: { days: 3, dominant: { icon: '☀️', label: '晴' }, avgHigh: 26, avgLow: 16, maxPrecipProb: 20, totalPrecip: 0, maxWind: 8 } },
      road: { durationMinutes: 120, distanceKm: km, source: 'OSRM' },
      rail: { available: false },
      aqi: 42, aqiInfo: { label: '优' },
    });
    state.analysis = {
      origin: { label: '广西壮族自治区 · 河池市 · 金城江区' },
      timeRange: { start: '2026-11-06', end: '2026-11-08', days: 3, weekdayHint: '周五至周日' },
      constraints: { radiusKm: 150, excludeLocal: true },
      summary: {}, stats: {}, dataNotes: [],
      candidates: [
        mk('a1', '荔波小七孔', '黔南州', '黔南', '荔波县', 78, 77, '风景区'),
        mk('a2', '茂兰喀斯特森林', '黔南州', '黔南', '荔波县', 72, 80, '风景区'),
        mk('a3', '邓恩铭故居', '黔南州', '黔南', '荔波县', 61, 82, '博物馆'),
        mk('b1', '加榜梯田', '黔东南州', '黔东南', '从江县', 75, 165, '风景区'),
        mk('b2', '西江千户苗寨', '黔东南州', '黔东南', '雷山县', 70, 199, '古村'),
        mk('c1', '柳州古城', '柳州市', '柳州', '城中区', 66, 141, '古迹'),
        mk('c2', '融水双龙沟', '柳州市', '柳州', '融水苗族自治县', 64, 125, '风景区'),
      ],
    };
    gotoStep(2);
    renderStep2();
    renderCards();
    return true;
  })()`);
  await sleep(1200);

  // 1) 分组结构
  const groups = await evalJs(`(() => {
    return [...document.querySelectorAll('#cards .place-group')].map(g => ({
      key: g.dataset.place,
      head: g.querySelector('.place-head').innerText.replace(/\\n/g, ' | '),
      items: [...g.querySelectorAll('.dest-card .card-title h4')].map(x => x.textContent),
    }));
  })()`);
  console.log('=== 分组 ===');
  for (const g of groups) console.log(' ', g.key, '→', g.items.join(', '), '||', g.head);

  const cardCount = await evalJs(`document.querySelectorAll('#cards .dest-card').length`);
  console.log('卡片数 =', cardCount, '（应为 7）');

  // 2) 搜索过滤
  await evalJs(`(() => { const i = document.querySelector('#candSearch'); i.value='溶洞'; i.dispatchEvent(new Event('input',{bubbles:true})); return true; })()`);
  await sleep(500);
  console.log('搜索「溶洞」后卡片数 =', await evalJs(`document.querySelectorAll('#cards .dest-card').length`));
  console.log('提示条 =', await evalJs(`document.querySelector('#filterNote')?.innerText`));

  await evalJs(`(() => { const i = document.querySelector('#candSearch'); i.value='柳州'; i.dispatchEvent(new Event('input',{bubbles:true})); return true; })()`);
  await sleep(500);
  console.log('搜索「柳州」后卡片数 =', await evalJs(`document.querySelectorAll('#cards .dest-card').length`));
  console.log('分组数 =', await evalJs(`document.querySelectorAll('#cards .place-group').length`));

  // 无匹配 → 空态
  await evalJs(`(() => { const i = document.querySelector('#candSearch'); i.value='不存在的关键词xyz'; i.dispatchEvent(new Event('input',{bubbles:true})); return true; })()`);
  await sleep(500);
  console.log('无匹配空态 =', await evalJs(`document.querySelector('#cards .empty-mini')?.innerText`));

  // 清空
  await evalJs(`document.querySelector('#candSearchClear').click()`);
  await sleep(500);
  console.log('清空后卡片数 =', await evalJs(`document.querySelectorAll('#cards .dest-card').length`));

  // 3) 折叠
  await evalJs(`document.querySelectorAll('#cards [data-place-toggle]')[0].click()`);
  await sleep(400);
  console.log('折叠后首组 visible =', await evalJs(`(() => { const g=document.querySelector('#cards .place-group'); return {collapsed: g.querySelector('.place-items').classList.contains('collapsed'), caret: g.querySelector('.place-caret').textContent, aria: g.querySelector('.place-head').getAttribute('aria-expanded')}; })()`));
  await evalJs(`document.querySelectorAll('#cards [data-place-toggle]')[0].click()`);
  await sleep(400);
  console.log('展开后 collapsed =', await evalJs(`document.querySelector('#cards .place-group .place-items').classList.contains('collapsed')`));

  // 4) 平铺模式
  await evalJs(`(() => { const c = document.querySelector('#groupByPlace'); c.checked = false; c.dispatchEvent(new Event('change',{bubbles:true})); return true; })()`);
  await sleep(500);
  console.log('平铺模式：分组数 =', await evalJs(`document.querySelectorAll('#cards .place-group').length`), '卡片数 =', await evalJs(`document.querySelectorAll('#cards .dest-card').length`));
  await evalJs(`(() => { const c = document.querySelector('#groupByPlace'); c.checked = true; c.dispatchEvent(new Event('change',{bubbles:true})); return true; })()`);
  await sleep(500);

  // 截图：第二步整块
  const box = await evalJs(`(() => {
    const el = document.querySelector('#panel2');
    const r = el.getBoundingClientRect();
    return { x: r.x + window.scrollX, y: r.y + window.scrollY, width: r.width, height: Math.min(r.height, 2200) };
  })()`);
  const shot = await S('Page.captureScreenshot', {
    format: 'png', captureBeyondViewport: true,
    clip: { x: box.x, y: box.y, width: box.width, height: box.height, scale: 1 },
  });
  if (!shot.result?.data) throw new Error('no screenshot: ' + JSON.stringify(shot).slice(0, 300));
  fs.writeFileSync(path.join(OUT, 'preview-step2-groups.png'), Buffer.from(shot.result.data, 'base64'));
  console.log('截图已保存 preview/preview-step2-groups.png');

  browser.ws.close();
  chrome.kill();
  process.exit(0);
})().catch((e) => { console.error('FAIL', e.message); process.exit(1); });