// Instrumented read-only UI probe. Logs each step immediately so a hang is visible.
const { chromium } = require('playwright-core');
const fs = require('fs');
const path = require('path');

const CACHE = path.join(process.env.LOCALAPPDATA || 'C:/Users/iwt/AppData/Local', 'ms-playwright');
function findChrome() {
  for (const rev of ['chromium-1234', 'chromium-1228']) {
    const exe = path.join(CACHE, rev, 'chrome-win64', 'chrome.exe');
    if (fs.existsSync(exe)) return exe;
  }
  return null;
}
const TARGET = process.env.PW_BASE_URL || 'http://cfc.iwintrue.com/frontend';
const EXE = findChrome();
const log = (...a) => { process.stdout.write('[' + new Date().toISOString().slice(11, 19) + '] ' + a.join(' ') + '\n'); };

// Hard kill switch so we never hang the session.
const KILL = setTimeout(() => { log('HARD_TIMEOUT 60s -> exiting'); process.exit(3); }, 60000);

(async () => {
  log('chrome_exe=' + EXE);
  if (!EXE) { log('NO CHROME'); process.exit(2); }
  const browser = await chromium.launch({
    executablePath: EXE, headless: true,
    args: ['--no-sandbox', '--disable-dev-shm-usage', '--disable-gpu'],
  });
  log('launched');
  const page = await browser.newPage({ viewport: { width: 1280, height: 800 } });
  page.on('console', (m) => { if (m.type() === 'error') log('console.error: ' + m.text().slice(0, 120)); });
  page.on('pageerror', (e) => log('pageerror: ' + e.message.slice(0, 120)));
  page.on('requestfailed', (r) => log('requestfailed: ' + r.url().slice(0, 80) + ' ' + (r.failure() && r.failure().errorText)));

  log('goto ' + TARGET);
  const resp = await page.goto(TARGET, { waitUntil: 'domcontentloaded', timeout: 20000 });
  log('goto done status=' + (resp ? resp.status() : 'null') + ' url=' + page.url());
  const ua = await page.evaluate(() => navigator.userAgent);
  log('ua=' + ua);
  await page.waitForTimeout(2000).catch(() => {});
  const title = await page.title();
  const bodyLen = await page.evaluate(() => (document.body ? document.body.innerText.length : 0));
  log('title=' + JSON.stringify(title) + ' bodyTextLen=' + bodyLen);
  const mount = await page.evaluate(() => {
    const out = [];
    for (const id of ['app', 'root']) if (document.getElementById(id)) out.push(id);
    return out;
  });
  log('mountRoots=' + JSON.stringify(mount));
  const markers = await page.evaluate(() => {
    const txt = (document.body ? document.body.innerText : '').toLowerCase();
    const inputs = Array.from(document.querySelectorAll('input')).map((i) => i.type || 'text');
    return { inputTypes: [...new Set(inputs)], mentionsLogin: /登录|login|用户名|密码|password/i.test(txt) };
  });
  log('markers=' + JSON.stringify(markers));
  log('PROBE_OK');
  await browser.close();
  clearTimeout(KILL);
  process.exit(0);
})().catch((e) => { log('ERR ' + (e && e.message ? e.message : e)); process.exit(1); });