import { SerialPort } from 'serialport';
import { ReadlineParser } from '@serialport/parser-readline';

// --- Config ---
// This is now the correct port from your dmesg log!
const PORT_PATH = '/dev/ttyACM0';

// This is a guess. Check your manual if 9600 doesn't work.
const BAUD_RATE = 9600;

// --- Code ---
console.log(`Attempting to open port: ${PORT_PATH} at ${BAUD_RATE} baud...`);

const port = new SerialPort({
  path: PORT_PATH,
  baudRate: BAUD_RATE,
});

// Use the ReadlineParser to get data line-by-line
const parser = port.pipe(new ReadlineParser({ delimiter: '\n' }));

port.on('open', () => {
  console.log(`✅ Serial port open. Waiting for scans...`);
});

// Listen to the parser for complete lines
parser.on('data', (line: string) => {
  console.log(`[SCANNER DATA]: ${line}`);
});

port.on('error', (err) => {
  console.error('❌ Serial port error:', err.message);
  if (err.message.includes('Permission denied')) {
    console.error("Hint: Did you log out and back in after running 'sudo usermod -aG dialout'?");
  }
});