// const { SerialPort } = require('serialport')

// // Create a port
// const port = new SerialPort({
//   path: 'COM7',
//   baudRate: 9600,
// })
// port.on('readable', function () {
//     console.log('Data:', port.read())
//   })

//   // Switches the port into "flowing mode"
//   port.on('data', function (data) {
//     console.log('Data:', data.toString('UTF8'))
//   })
const {
  SerialPort
} = require('serialport')
const {
  ReadlineParser
} = require('@serialport/parser-readline')
const http = require('node:http');

const fs = require('fs');
const port = new SerialPort({
  path: 'COM9',
  baudRate: 9600
})

var value_arduino = "";

const parser = port.pipe(new ReadlineParser({
  delimiter: '\r\n'
}))
parser.on('data', (data => {
  if (value_arduino != data) {
    console.log(data);
  }
  value_arduino = data;
}));

// Create a local server to receive data from
const server = http.createServer((req, res) => {

  if (req.url == "/") {
    fs.readFile('index.html', 'utf-8', (err, data) => {
      if (err) {
        res.writeHead(404);
        return;
      }
      res.writeHead(200, {
        'Content-Type': 'text/html'
      });
      res.end(data);
    })
  } else if (req.url == "/pin") {
    res.writeHead(200, {
      'Content-Type': 'application/json'
    });
    res.end(value_arduino);
  }
})
server.listen(2048);