/* cdp-verify-videoinfo2.mjs — 验证：视频详情标题去重 + 第2/3行字段等宽统一（09-01） */
const CDP = 'http://127.0.0.1:9223';
async function getWs(targetId) {
  const tabs = await (await fetch(CDP + '/json')).json();
  const t = tabs.find((x) => x.id === targetId);
  if (!t) throw new Error('target not found: ' + targetId);
  return t.webSocketDebuggerUrl;
}
function cdp(ws, method, params = {}) {
  return new Promise((resolve, reject) => {
    const id = ++cdp._id;
    const w = new WebSocket(ws);
    const timer = setTimeout(() => { try { w.close(); } catch (e) {} reject(new Error('timeout: ' + method)); }, 30000);
    w.onopen = () => w.send(JSON.stringify({ id, method, params }));
    w.onmessage = (ev) => {
      const m = JSON.parse(ev.data);
      if (m.id !== id) return;
      clearTimeout(timer);
      try { w.close(); } catch (e) {}
      m.error ? reject(new Error(method + ': ' + JSON.stringify(m.error))) : resolve(m.result);
    };
    w.onerror = () => { clearTimeout(timer); reject(new Error('ws error: ' + method)); };
  });
}
cdp._id = 0;
async function evalJs(ws, expr) {
  const r = await cdp(ws, 'Runtime.evaluate', { expression: expr, awaitPromise: true, returnByValue: true });
  if (r.exceptionDetails) throw new Error('eval err: ' + JSON.stringify(r.exceptionDetails).slice(0, 300));
  return r.result && r.result.value;
}
const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
const waitFor = async (ws, expr, timeout = 15000, label = '') => {
  const t0 = Date.now();
  while (Date.now() - t0 < timeout) {
    if (await evalJs(ws, expr)) return true;
    await sleep(300);
  }
  throw new Error('waitFor timeout: ' + label);
};

async function main() {
  const tabs = await (await fetch(CDP + '/json')).json();
  const tab = tabs.find((x) => x.url.includes('localhost:8900')) || tabs.find((x) => x.type === 'page');
  if (!tab) throw new Error('no 8900 tab found');
  const ws = await getWs(tab.id);
  await cdp(ws, 'Page.enable');
  await cdp(ws, 'Runtime.enable');

  let pass = 0, fail = 0;
  const check = (name, cond) => { cond ? pass++ : fail++; console.log((cond ? 'PASS' : 'FAIL') + ' | ' + name); };

  await cdp(ws, 'Page.navigate', { url: 'http://localhost:8900/?v=vinfo2#/video/680' });
  await waitFor(ws, `!!document.querySelector('.video-detail-title')`, 15000, '视频详情渲染');

  const r = await evalJs(ws, `(() => {
    const card = document.querySelector('.video-info');
    const title = card ? card.querySelector('.video-detail-title') : null;
    const toolbarTitle = document.querySelector('.page-toolbar .page-title');
    const rows = card ? [...card.querySelectorAll('.info-row')] : [];
    const rowWidths = rows.slice(0, 2).map((row) => [...row.querySelectorAll('.info-item')].map((it) => Math.round(it.getBoundingClientRect().width)));
    const titleText = title ? title.textContent.trim() : '';
    const titleOccur = document.body.textContent.split(titleText).length - 1;
    return {
      toolbarTitle: toolbarTitle ? toolbarTitle.textContent.trim() : '',
      hasCardTitle: !!title,
      cardTitle: titleText.slice(0, 20),
      titleOccur,
      rowCount: rows.length,
      rowWidths,
      hasRenderErr: document.body.textContent.includes('渲染失败')
    };
  })()`);

  check('toolbar 标题=「视频详情」静态（' + r.toolbarTitle + '）', r.toolbarTitle === '视频详情');
  check('信息卡标题行存在（' + r.cardTitle + '）', r.hasCardTitle && !!r.cardTitle);
  check('视频标题全页仅出现 1 次（' + r.titleOccur + '）', r.titleOccur === 1);
  check('共 3 组信息行', r.rowCount === 3);
  const w1 = r.rowWidths[0] || [], w2 = r.rowWidths[1] || [];
  check('第2行 4 字段等宽（' + JSON.stringify(w1) + '）', w1.length === 4 && new Set(w1).size === 1);
  check('第3行 4 字段等宽（' + JSON.stringify(w2) + '）', w2.length === 4 && new Set(w2).size === 1);
  check('第2/3行字段宽度一致（' + (w1[0] || '') + ' vs ' + (w2[0] || '') + '）', w1.length === 4 && w2.length === 4 && w1[0] === w2[0]);
  check('无渲染失败', !r.hasRenderErr);

  console.log(`\n结果: ${pass} PASS / ${fail} FAIL`);
  process.exit(fail ? 1 : 0);
}
main().catch((e) => { console.error('ERROR:', e.message); process.exit(1); });