var events = require('events'),
    util = require('util');

var IR = function (arduino) {
  if(!arduino) {console.log("Arduino not set!");}
  this.arduino = arduino;

  this.arduino.on('data', function (message) {
    var m = message.slice(0, -1).split('-'),
        err = null;

    if (m.length != 3) {
      return;
    }

    console.log(m);
    this.emit('read', err, m);
    
  }.bind(this));
}

util.inherits(IR, events.EventEmitter);

IR.prototype.send = function(type, len, val) {
  
  type = String.fromCharCode(type);
  len = String.fromCharCode(len);
  val = this.arduino.valueToLastFour(val);

  this.arduino.write(new Buffer('X0' + type + len + val,'ascii'));

};

IR.prototype.receive = function() {

  this.arduino.write(new Buffer('Y0000000', 'ascii'));  

};

module.exports = IR;