var client = require('./kestrelClient.js');
var ee2 = require('eventemitter2').EventEmitter2;
var util = require('util');



var consumer = function( queue, options ){
    this._queue = queue;
    this._options = new client(options);
    this._client = new client(options);
    this._client.connect();

    this._callback = null;
    this._consume = false;
    this._timeout = 3000;

    var self = this;
    this._client.on('message', function(message){

	if( typeof self._callback == 'function' ){
	    self._callback(message);
	}

	if( self._consume ){
	    self.get(self._timeout);
	}

	self.emit('message', message);
    });

    this._client.on('empty', function(){
	self.get(self._timeout);
    });

    ee2.call(this);
}
util.inherits(consumer,ee2);


consumer.prototype.get = function( timeout ){
    this._client.get(this._queue, timeout);
}

consumer.prototype.consume = function( callback ){
    if(!this._client){
	this._client = client(this._options);
	this.client.connect();
    }
    if( typeof(callback) == 'function' ){
	this._callback = callback;
    }
    this._consume = true;
    this.get(this._timeout);
}

consumer.prototype.stopConsuming = function(){
    this._consume = false;
    this._client.close();
    this._client = null;
}

module.exports = consumer;