// 量「重新加载按钮」与 footer border-top 的真实间距
import { spawn } from 'node:child_process';
import { mkdtempSync, writeFileSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';

const CHROME = 'C:/Users/QunLIn/.agent-browser/browsers/chrome-154.0.8037.92/chrome.exe';
const PORT = 9409;
const URL_ = process.argv[2] || 'http://127.0.0.1:1313/comment.html';
const OUT = process.argv[3] || 'C:/Users/QunLIn/WorkBuddy/2026-10-02-15-13-24/.workbuddy/ftgap.json';
const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
const userDir = mkdtempSync(join(tmpdir(), 'cdp-ft3-'));

const chrome = spawn(CHROME, [
  '--headless=new', `--remote-debugging-port=${PORT}`, `--user-data-dir=${userDir}`,
  '--no-first-run', '--disable-gpu', '--window-size=1280,1400', 'about:blank',
], { stdio: 'ignore' });

try {
  for (let i = 0; i < 40; i++) {
    try { const r = await fetch(`http://127.0.0.1:${PORT}/json/version`); if (r.ok) break; } catch { /* */ }
    await sleep(300);
  }
  const tab = await (await fetch(`http://127.0.0.1:${PORT}/json/new?${encodeURIComponent(URL_)}`, { method: 'PUT' })).json();
  const ws = new WebSocket(tab.webSocketDebuggerUrl);
  let id = 0; const pending = new Map();
  ws.addEventListener('message', (ev) => { const m = JSON.parse(ev.data); if (m.id && pending.has(m.id)) { pending.get(m.id)(m); pending.delete(m.id); } });
  await new Promise((res) => ws.addEventListener('open', res));
  const send = (method, params = {}) => new Promise((res) => { const mid = ++id; pending.set(mid, res); ws.send(JSON.stringify({ id: mid, method, params })); });
  const ev = async (expr) => {
    const r = await send('Runtime.evaluate', { expression: expr, returnByValue: true, awaitPromise: true });
    return r.result?.result?.value ?? r.result?.value ?? null;
  };

  await send('Runtime.enable');
  await send('Page.enable');
  await sleep(9000);

  const out = await ev(`(() => {
    const btn = document.querySelector('.atk-err-retry');
    const ft = document.querySelector('.footer');
    if (!btn || !ft) return JSON.stringify({ btn: !!btn, footer: !!ft });
    const b = btn.getBoundingClientRect();
    const f = ft.getBoundingClientRect();
    return JSON.stringify({
      btnBottom: Math.round(b.bottom + scrollY),
      footerBorderTop: Math.round(f.top + scrollY),
      gap: Math.round(f.top - b.bottom),
      layerMargin: getComputedStyle(document.querySelector('.atk-error-layer')).margin
    }, null, 1);
  })()`);
  writeFileSync(OUT, String(out));
  ws.close();
} catch (e) {
  writeFileSync(OUT, 'ERR ' + e.message);
} finally {
  chrome.kill();
}