mainApp.factory('Compute',[ '$http', 'Identity', function($http, Identity){


	// Init data
	var data={};
	data.machines=null;
	data.axioms={} // Contain static data
	data.axioms.ram=[128,512,1024,2048,4096];
	data.axioms.disk=[1,2,5,10,25,50,100,150,200]
	data.axioms.images={}; // Retrieve after
	

	/**
	 * Parse pullMachines answer
	 * @param {response} the server response
	 * @param {boolean} false if the request as been send true else
	 * @return {requestParserResult} the result of parsing
	 */
	var parsePullMachinesAnswer=function(response, failedToSendRequest){

		// Defined return object
		var requestParserResult={};
		requestParserResult.status=1;
		requestParserResult.failReason=null;

		
		if (typeof response.data.Servers !== 'undefined') {
			// Set status code
			requestParserResult.status=0;
			data.machines=response.data.Servers;

		}
		else if(failedToSendRequest){
			requestParserResult.failReason="Failed to send PullMachine request";
		}
		else{
			requestParserResult.failReason="Error";
		}
		return requestParserResult;
	};


	/**
	 * Retrieve machine list 
	 * @param {callback} function to call after request complete
	 */
	var pullMachines=function(callback){
		// Send listServers request
		var result=$http.post('../server/index.php',
							  $.param({"token" : Identity.getToken(), "task" : "compute", "action":"listServers"}));		

		// Wait and handle the response
        result.then(function (response){
			callback(parsePullMachinesAnswer(response, false));
        },function(response){
			callback(parsePullMachinesAnswer(response, true));
        });
	};


	/**
	 * Parse pullImages answer
	 * @param {response} the server response
	 * @param {boolean} false if the request as been send true else
	 * @return {requestParserResult} the result of parsing
	 */
	var parsePullImagesAnswer=function(response, failedToSendRequest){

		// Defined return object
		var requestParserResult={};
		requestParserResult.status=1;
		requestParserResult.failReason=null;

		
		if (typeof response.data.Images !== 'undefined') {
			// Set status code
			requestParserResult.status=0;
			data.axioms.images=response.data.Images;
		}
		else if(failedToSendRequest){
			requestParserResult.failReason="Failed to send PullImage request";
		}
		else{
			requestParserResult.failReason="Error";
		}
		return requestParserResult;
	};



	
	/**
	 * Retrieve machine list 
	 * @param {callback} function to call after request complete
	 */
	var pullImages=function(callback){
		// Send listServers request
		var result=$http.post('../server/index.php',
							  $.param({"token" : Identity.getToken(), "task" : "compute", "action":"listImages"}));		

		// Wait and handle the response
        result.then(function (response){
			callback(parsePullImagesAnswer(response, false));
        },function(response){

			callback(parsePullImagesAnswer(response, true));
        });
	};


	/**
	 * Retrieve all data 
	 * @param {callback} function to call after request complete
	 */
	var pullData=function(callback){
		var nextFunction=function(response){
			if(response.status==0){
				pullMachines(callback);
			}
                        else{
                            callback(response);
                        }
		}
		pullImages(nextFunction);
	}


	/**
	 * Get Data
	 * @return {data} return the data object
	 */
	var getData=function(){
		return data;
	}
	
	// Return services objects
	return {
		pullMachines: pullMachines,
		pullData: pullData,
		getData: getData
	};

	
}]);