//List of modules required
var express = require('express')
  , routes = require('./routes/routes')
  , http = require('http')
  , path = require('path')
  , serialport = require('serialport')
//, fs = require('fs') //not required
  , socketio = require('socket.io');
  
var app = express();
	   
app.configure(function(){
  app.set('port', process.env.PORT || 3000);
  app.set('views', __dirname + '/views');
  app.set('view engine', 'jade');
  app.use(express.favicon(__dirname + '/public/favicon.ico'));
  app.use(express.logger('dev'));
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(express.cookieParser('your secret here'));
  app.use(express.session());
  app.use(app.router);
  app.use(express.static(path.join(__dirname, 'public')));
});

app.configure('development', function(){
  app.use(express.errorHandler());
});

//routing pages you can get to the page using either / or /mobile
app.get('/', routes.mobile);
app.get('/mobile', routes.mobile);

/* Sometimes I get frustrated with Jade and want to test code in straight html
app.get('/test', function(req, res) {
    fs.readFile(__dirname + '/public/test.html', 'utf8', function(err, text){
        res.send(text);
    });
});
*/

var server = app.listen(app.get('port'), function(){
  console.log("Robot Server listening on port " + app.get('port'));
});


//--SerialPort Code---
//Listening on the serial port for data coming from Arduino over USB
var arduinoSerialPort = '/dev/ttyACM0';
var RobotStatus;

var ArduinoPort = new serialport.SerialPort(arduinoSerialPort, {
	parser: serialport.parsers.readline('\n'),
	baudrate: 115200
});

console.log('Serial Port Started...');

//When a new line of text is received from Arduino over USB
ArduinoPort.on('data', function (data) {
	RobotStatus = JSON.parse(data);
});

//--Socket io code----
// log level 1 is not very verbose
var io = socketio.listen(server, {
	'log level' : 1
});

io.sockets.on('connection', function (socket) {
		  
	/* socket.emit('welcome', { msg: 'You are connected' });
	
	socket.on('disconnect', function () {
		console.log('User Disconnected');
	});
	*/
	
	//the server emits the RobotStatus JSON string every 100ms regardless of how often the
	//data arrives from the arduino
	setInterval(function () {
		  	socket.emit('robot-info', RobotStatus );
		  }, 100);
		  	  

  	//When any of the controls on the mobile page is pressed, that 'client' emits a 'robot_control' message
  	//this code responds and sends that info to the arduino
	socket.on('robot_control', function(data) {
		 //console.log('scanner_control: ' + data.output); 
		 ArduinoPort.write(data.output);
		 
	});
	
});