var express = require('express');
var router = express.Router();
var child = require("child_process");

var SerialPort = require("serialport").SerialPort
var success;
child.exec('cd ../arduino && ino build && ino upload', function(err, stdout, stderr){
    
  if(err){console.log('Please install the ino utility and connect arduino!\nIf there are other open programs that communicate with the arduino, close them!'); return success = false;}

  var buff = stdout.slice(stdout.indexOf('Guessing serial port ... ')+25);
  buff = buff.slice(0, buff.indexOf('\n'));
  console.log('Guessing serial port ... ' + buff);

  serialPort = new SerialPort(buff, {
    baudrate: 9600
  }, false);
    
  serialPort.open(function (error) {
    if ( error ) {
      console.log('Please check arduino!')
      return successfalse;
    } 
  });

  return success = true;    
});

//console.log(success);

/* GET home page. */ 
router.get('/', function(req, res, next) {
  res.render('index', { title: 'Express' });
});

router.get('/toggleLight', function (req, res) {
  if(success) { serialPort.write(new Buffer('~','ascii')); } else {console.log("arduino not connected")}
  res.send('switch light');
});

module.exports = router;