'use strict';
/* 真实浏览器诊断：跑完整三步，dump 路线图 DOM 与住宿区 DOM */
const fs = require('fs');
const path = require('path');

const OUT = path.join(__dirname, '..', 'preview');
const BASE = process.env.BASE || 'http://127.0.0.1:8788';
const AMAP = process.env.AMAP_KEY || '';
const sleep = (ms) => 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 () => {
  const { webSocketDebuggerUrl } = await (await fetch('http://127.0.0.1:9333/json/version')).json();
  const browser = await CDP.connect(webSocketDebuggerUrl);
  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: 1360, height: 1800, deviceScaleFactor: 1, mobile: false });

  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;
  };

  // 预置设置（含高德 Key），这样能跑通真实底图与周边 POI
  await S('Page.navigate', { url: BASE });
  await sleep(2500);
  if (AMAP) {
    await evalJs(`(() => {
      const raw = JSON.parse(localStorage.getItem('tripsense.ai') || '{}');
      raw.amapKey = ${JSON.stringify(AMAP)};
      localStorage.setItem('tripsense.ai', JSON.stringify(raw));
      return true;
    })()`);
    await S('Page.reload');
    await sleep(2500);
    console.log('amap key injected:', AMAP ? AMAP.slice(0, 6) + '…' : '(none)');
  }

  // 出发地
  await evalJs(`(() => { const el = document.querySelector('#originInput'); el.value = '柳州'; el.dispatchEvent(new Event('input', { bubbles: true })); return true; })()`);
  for (let i = 0; i < 20; i++) {
    await sleep(1000);
    const ok = await evalJs(`(() => { const it = document.querySelector('#suggestBox .suggest-item'); if (it && !document.querySelector('#suggestBox').classList.contains('hidden')) { it.click(); return true; } return false; })()`);
    if (ok) break;
  }
  console.log('origin =', await evalJs(`document.querySelector('#originInput')?.value`));

  // 分析
  await evalJs(`document.querySelector('#analyzeBtn')?.click()`);
  for (let i = 0; i < 40; i++) {
    await sleep(1500);
    const n = await evalJs(`document.querySelectorAll('.dest-card').length`);
    if (n) { console.log('candidates =', n); break; }
    if (i === 39) console.log('candidates = 0 (超时)');
  }
  console.log('alerts =', await evalJs(`(document.querySelector('#alerts')?.innerText || '').slice(0, 300)`));

  // 选 3 个
  await evalJs(`(() => { const b = [...document.querySelectorAll('.dest-card .pick-btn')].slice(0,3); b.forEach(x => x.click()); return b.length; })()`);
  await sleep(2000);

  // 进入第三步（否则面板 display:none，getBoundingClientRect 全是 0）
  await evalJs(`document.querySelector('#toStep3')?.click()`);
  await sleep(1200);
  console.log('step3 active =', await evalJs(`document.querySelector('#panel3')?.classList.contains('active')`));

  // 生成方案
  await evalJs(`document.querySelector('#planBtn')?.click()`);
  for (let i = 0; i < 30; i++) {
    await sleep(1500);
    const t = await evalJs(`document.querySelector('#outputMeta')?.textContent || ''`);
    if (t.includes('生成完成') || t.includes('中断')) { console.log('outputMeta =', t); break; }
    if (i === 29) console.log('outputMeta =', t);
  }
  await sleep(4000);

  // ===== 关键诊断：路线图 =====
  console.log('\n=== 路线图诊断 ===');
  console.log('planExtra hidden =', await evalJs(`document.querySelector('#planExtra')?.classList.contains('hidden')`));
  console.log('routeNote =', JSON.stringify(await evalJs(`document.querySelector('#routeNote')?.textContent`)));
  console.log('routeMap children =', await evalJs(`document.querySelector('#routeMap')?.children.length`));
  console.log('routeMap html (600) =', JSON.stringify(await evalJs(`(document.querySelector('#routeMap')?.innerHTML||'').slice(0,600)`)));
  console.log('routeMap box =', JSON.stringify(await evalJs(`(() => { const e = document.querySelector('#routeMap'); if(!e) return null; const r = e.getBoundingClientRect(); return {w: Math.round(r.width), h: Math.round(r.height)}; })()`)));
  console.log('svg count =', await evalJs(`document.querySelectorAll('#routeMap svg').length`));
  console.log('img count =', await evalJs(`document.querySelectorAll('#routeMap img').length`));

  // ===== 住宿诊断 =====
  console.log('\n=== 住宿诊断 ===');
  console.log('stayNote =', JSON.stringify(await evalJs(`document.querySelector('#stayNote')?.textContent`)));
  console.log('hotelBox (900) =', JSON.stringify(await evalJs(`(document.querySelector('#hotelBox')?.innerText||'').slice(0,900)`)));

  // 截图：先整页，再分别截路线图与住宿卡
  await evalJs(`document.querySelector('#planExtra')?.scrollIntoView({block:'start'})`);
  await sleep(1200);
  const shot = await S('Page.captureScreenshot', { format: 'png' });
  if (shot.result?.data) fs.writeFileSync(path.join(OUT, 'preview-diag.png'), Buffer.from(shot.result.data, 'base64'));

  const clipOf = async (sel, file) => {
    const box = await evalJs(`(() => { const e = document.querySelector(${JSON.stringify(sel)}); if(!e) return null; const r = e.getBoundingClientRect(); return {x:r.x+window.scrollX,y:r.y+window.scrollY,width:r.width,height:r.height}; })()`);
    if (!box || box.width < 2) { console.log('no box for', sel); return; }
    const s = await S('Page.captureScreenshot', { format: 'png', clip: { ...box, scale: 1 } });
    if (s.result?.data) fs.writeFileSync(path.join(OUT, file), Buffer.from(s.result.data, 'base64'));
  };
  await clipOf('#routeMap', 'preview-diag-route.png');
  await clipOf('#hotelBox', 'preview-diag-hotel.png');

  console.log('\nscreenshots saved to preview/');
  browser.ws.close();
  process.exit(0);
})().catch((e) => { console.error('FAIL', e.message); process.exit(1); });