package com.zehfernando.data {
	import br.com.stimuli.loading.BulkLoader;
	import br.com.stimuli.loading.BulkProgressEvent;
	
	import flash.events.Event;
	import flash.events.EventDispatcher;
	import flash.events.IEventDispatcher;
	import flash.events.ProgressEvent;	

	/**
	 * @author Zeh Fernando
	 */
	public class DataAssetManager extends EventDispatcher {

		// A sort of a proxy for BulkLoader
		protected static var instance:DataAssetManager;
		
		// Properties
		protected var loader:BulkLoader;

		// ================================================================================================================
		// CONSTRUCTOR ----------------------------------------------------------------------------------------------------

		public function DataAssetManager(target:IEventDispatcher = null) {
			super(target);

			setInstance(this);

			loader = new BulkLoader("dataAssetManagerMain");
			
			loader.addEventListener(BulkLoader.ERROR, onLoadingError); 
			loader.addEventListener(BulkLoader.PROGRESS, onLoadingProgress);
			loader.addEventListener(BulkLoader.COMPLETE, onLoadingComplete);
		}

		// ================================================================================================================
		// INSTANCE functions ---------------------------------------------------------------------------------------------

		public function addAsset(__url:String, __id:String, __weight:Number = 1): void {
			loader.add(__url, {id:__id, weight:__weight});
		}
		
		public function start(): void {
			if (Boolean(loader)) loader.start();
		}
		
		public function getXML(__id:String): XML {
			return loader.getXML(__id);
		}
		
		// ================================================================================================================
		// EVENT functions ------------------------------------------------------------------------------------------------

		protected function onLoadingError(e:Event): void {
			trace ("DataAssetManager event - onLoadingError");
		}

		protected function onLoadingProgress(e:BulkProgressEvent): void {
			//trace ("DataAssetManager event - onLoadingProgress = " + e.bytesLoaded + " / " + e.bytesTotal + " (" + e.bytesTotalCurrent + ")");
			var npe:ProgressEvent = new ProgressEvent(ProgressEvent.PROGRESS, false, false, e.bytesLoaded, e.bytesTotal);
			dispatchEvent(npe);
		}

		protected function onLoadingComplete(e:Event): void {
			//trace ("DataAssetManager event - onLoadingComplete");
			var nce:Event = new Event(Event.COMPLETE, false, false);
			dispatchEvent(nce);
		}

//			DataAssetManager.getInstance().addEventListener(IOErrorEvent.IO_ERROR, onAssetsError); 
//			DataAssetManager.getInstance().addEventListener(ProgressEvent.PROGRESS, onAssetsProgress);
//			DataAssetManager.getInstance().addEventListener(Event.COMPLETE, onAssetsComplete);

		// ================================================================================================================
		// STATIC functions -----------------------------------------------------------------------------------------------

		public static function setInstance(__instance:DataAssetManager): void {
			instance = __instance;
		}
		
		public static function getInstance(): DataAssetManager {
			if (instance == null) setInstance(new DataAssetManager());
			return instance;
		}
	}
}