package aw.net.amf{
	import flash.events.Event;
	import flash.events.EventDispatcher;
	import flash.utils.Dictionary;

	public dynamic class ServiceCallerSequence extends EventDispatcher{
		static private const sequences:Dictionary = new Dictionary();
		protected var _callers:Array = [];
		protected var _successHandlers:Array = [];
		protected var _errorHandlers:Array = [];
		protected var _arguments:Array = [];
		protected var _inProgress:Boolean;
		public function ServiceCallerSequence():void{
			super();
		}
		public function call(method:String, successHandler:Function, errorHandler:Function=null, ...args):void{
			this.callWithArgumentList(method, successHandler, errorHandler, args);
		}
		public function callWithArgumentList(method:String, successHandler:Function, errorHandler:Function=null, args:Array=null):void{
			this._callers.push(new ServiceCaller(method, this.callerSuccessHandler, this.callerSuccessHandler));
			this._successHandlers.push(successHandler);
			this._errorHandlers.push(errorHandler);
			this._arguments.push(args ? args : []);
			this.start();
		}
		protected function start():void{
			if(this._inProgress) return;
			if(this._callers.length){
				sequences[this] = true;
				var caller:ServiceCaller = this._callers.shift();
				caller.callWithArgumentList(this._arguments.shift());
				this._inProgress = true;
			}else{
				delete sequences[this];
				this.dispatchEvent(new Event(Event.COMPLETE));
			}
		}
		protected function callerSuccessHandler(value:*):void{
			this._inProgress = false;
			var handler:Function = this._successHandlers.shift();
			handler(value);
			this.start();
		}
		protected function callerErrorHandler(value:*):void{
			this._inProgress = false;
			var handler:Function = this._errorHandlers.shift();
			handler(value);
			this.start();
		}
	}
}