package com.toddrothe.service
{	
	import flash.events.Event;
	import flash.events.EventDispatcher;
	import flash.utils.Timer;
	import flash.utils.getDefinitionByName;
	import flash.utils.getQualifiedClassName;
	
	import com.toddrothe.proxies.FlickrProxy; // TR: holds service specific calls like loadImage()
	import com.toddrothe.proxies.YouTubeProxy;
	import com.toddrothe.proxies.GoogleAnalyticsProxy;

	public class ServiceProxy extends EventDispatcher
	{
		protected var callDurationTimer:Timer = new Timer() 
		protected var analyticsProxy:GoogleAnalyticsProxy = new GoogleAnalyticsProxy();
		
		protected var _service:*; // TR: in this sample the servics are imported above (YouTube and Flickr)
		protected var _serviceCall:String;
		protected var _event:String;
		protected var _rest:Array;
		
		public function ServiceProxy()
		{	
		}
		
		public function makeCall( service:String, serviceCall:String, event:String = null, ...rest  ):void
		{
			_service = service;
			_serviceCall = serviceCall;
			_event = event;
			_rest = rest;
		
			callDurationTimer.start(); // TR: start timer to track how long it takes to receive a response
			executeCall();
			// TR: create and start another timer to track server timeouts
		}		
		
		protected function executeCall():void
		{			
			if( _event )
			{ // TR: use eventProxy helper func to clone and fire the event returned from the swc
				service.addEventListener( _event, eventProxy); 
			}
			if( _rest )
			{ // TR: if there are params
				service[_serviceCall].apply( null, _rest ); // TR: *note the '.apply'
			}
			else
			{ // TR: if no params then just make the call
				service[_serviceCall]();
			}
		}
		
		// TR: clone and dispatch the event that is returned
		protected function eventProxy( event:Event ):void 
		{
			callDurationTimer.stop();
			_request.removeEventListener( _event, eventProxy);
			analyticsProxy.submit( _service, _serviceCall, event, callDurationTimer.toString(), _rest )
			this.dispatchEvent( event.clone() ); // TR: LoginService.login() would assign a listener which this would trigger
		}
	}
}