package com.app.screen
{
	import com.app.utils.ComponentSerializer;
	import com.fake.utils.DescribeUtil;

	import mx.containers.Canvas;
	import mx.events.FlexEvent;
	import mx.validators.*;

	[Bindable]
	public class ScreenComponentCtrl extends Canvas
	{
		/**
		 * Label of the ScreenComponent to move to when the next button is clicked.
		 */
		public var nextScreen:String;

		/**
		 * Label of the ScreenComponent to move to when the summary button is clicked.
		 */
		public var summaryScreen:String;

		/**
		 * Indicates whether or not an action has taken place to make this visible in the summary
		 */
		public var active:Boolean;

		public function ScreenComponentCtrl()
		{
			super();

			addEventListener(FlexEvent.CREATION_COMPLETE, init);
		}

		/**
		 * Event handler for CREATION_COMPLETE.
		 * Abstract function.
		 */
		public function init(event:FlexEvent):void { }

		/**
		 * Called after the current label property of the ScreenContainer
		 * has changed. This Screen is the current screen at this point.
		 * Abstract function.
		 */
		public function onScreenEnter(isNext:Boolean = true):void { }

		/**
		 * Called after the next or summary button has been clicked and before the current
		 * screen changes. The container uses the nextScreen or summaryScreen to change screens.
		 * If the boolean returned is false the next action will be canceled
		 * Abstract function.
		 */
		/* public function onNextClick():Boolean { return true; } */

		public function onNextClick():void {}

		/**
		 * Called after the back button has been clicked and before the current
		 * screen changes. The container calls an undo on the currentScreenLabel property.
		 * Abstract function.
		 */
		public function onBackClick():void { }

		/**
		 * Clears all values and selections from the UIComponents. It also clears the
		 * related values in the data store.
		 * Abstract function.
		 */
		public function onClear():void { }

		/**
		 * Applies all values from the data store to the UIComponents.
		 */
		public function deserialize():void
		{
			ScreenContainerCtrl.instance.load();

			var node:XMLList = dataStore.child(DescribeUtil.localName(this));

			if(node)
				ComponentSerializer.instance.deserialize(this, ScreenContainerCtrl.instance.dataStore.child(DescribeUtil.localName(this)));
		}

		/**
		 * Converts all of the values from inputs into XML.
		 */
		public function serialize():void
		{
			var node:XML = ComponentSerializer.instance.serialize(this);
			var child:XMLList = ScreenContainerCtrl.instance.dataStore.child(node.localName());

			if(child.length() > 0)
			{
				ScreenContainerCtrl.instance.dataStore.replace(node.localName(), node);
			}
			else
			{
				ScreenContainerCtrl.instance.dataStore.appendChild(node);
			}

			ScreenContainerCtrl.instance.save();
		}

		public function validate():String { return "" }

		public function get dataStore():XML {
			return ScreenContainerCtrl.instance.dataStore;
		}

		public function get co2PerYear():Number { return 0 }
	}
}