const fs = require('fs');
const net = require('net');
const path = require('path');
const { jpegSplitter } = require('./phone_module');

const MARKER = path.join(__dirname, '..', '..', '.audio_bridge');

const bridgePort = () => {
  try {
    const port = Number(String(fs.readFileSync(MARKER, 'utf8')).trim());
    return Number.isFinite(port) && port > 0 ? port : 0;
  } catch (_) {
    return 0;
  }
};

module.exports = () => {
  const port = bridgePort();
  if (!port) return null;
  return {
    capture(onJpeg) {
      const sock = net.connect(port, '127.0.0.1');
      sock.on('error', () => {});
      sock.setNoDelay(true);
      sock.write('V');
      sock.on('data', jpegSplitter(onJpeg));
      return { stop() { try { sock.destroy(); } catch (_) {} } };
    }
  };
};