// Launch a Chromium instance via puppeteer-core and print the WebSocket endpoint to stdout
// Also write the launcher PID to /tmp/puppeteer_chrome_launcher.pid
const fs = require('fs');
(async () => {
  try {
    const puppeteer = require('puppeteer-core');
    const browser = await puppeteer.launch({
      headless: true,
      args: ['--no-sandbox', '--disable-setuid-sandbox', '--disable-dev-shm-usage'],
    });
    const ws = browser.wsEndpoint();
    const pidFile = '/tmp/puppeteer_chrome_launcher.pid';
    try { fs.writeFileSync(pidFile, String(process.pid)); } catch(e) { }
    console.log('PUPPETEER_WS=' + ws);
    console.log('LAUNCHER_PID=' + process.pid);
    // keep process alive until killed
    process.on('SIGINT', async () => { try { await browser.close(); } catch(e){}; process.exit(0); });
    process.on('SIGTERM', async () => { try { await browser.close(); } catch(e){}; process.exit(0); });
    // prevent exit
    await new Promise(() => {});
  } catch (err) {
    console.error('LAUNCH_ERROR', String(err));
    process.exit(2);
  }
})();