package org.papervision3d.core.utils
{

	
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.EventDispatcher;
	import flash.events.MouseEvent;
	import flash.geom.Point;
	
	import org.papervision3d.core.geom.renderables.Triangle3D;
	import org.papervision3d.core.proto.MaterialObject3D;
	import org.papervision3d.core.render.data.RenderHitData;
	import org.papervision3d.core.utils.virtualmouse.IVirtualMouseEvent;
	import org.papervision3d.core.utils.virtualmouse.VirtualMouse;
	import org.papervision3d.events.InteractiveScene3DEvent;
	import org.papervision3d.materials.MovieMaterial;
	import org.papervision3d.objects.DisplayObject3D;
	import org.papervision3d.view.Viewport3D;
	
	/**
	* @author John Grden
	*/
	public class InteractiveSceneManager extends EventDispatcher
	{
		/**
		* MOUSE_IS_DOWN is a quick static property to check and is maintained by the ISM
		*/
		public static var MOUSE_IS_DOWN:Boolean = false;
		
		/**
		* VirtualMouse is used with faceLevelMode of ISM or DO3D's.  Its a virtual mouse that causes the objects in your materials movieclip containers to fire off their mouse events such as click, over, out, release, press etc
		 * </p>
		 * <p>
		 * Using these events requires you only to do what you normally do - establish listeners with your objects like you normally would, and you'll receive them!
		*/		
		public var virtualMouse:VirtualMouse = new VirtualMouse();
		public var mouse3D:Mouse3D = new Mouse3D();
		public var viewport:Viewport3D;
		
		/**
		* Main container for ISM to create the sub InteractiveSprite containers for the faces and DO3D objects passed in during the render loop
		*/		
		public var container:Sprite;
		
		public var renderHitData:RenderHitData;	
		public var currentDisplayObject3D:DisplayObject3D;
		public var currentMaterial:MaterialObject3D;
		public var enableOverOut:Boolean = true;
		public var currentMouseDO3D:DisplayObject3D = null;
		public var debug:Boolean = false;
		
		public var currentMousePos : Point = new Point(); 
		public var lastMousePos : Point = new Point(); 
		
		public var _viewportRendered : Boolean = false;
		
		
		
		public function InteractiveSceneManager(viewport:Viewport3D) 
		{
			this.viewport = viewport;
			this.container = viewport.containerSprite; 
			init();
		}
		
		public function destroy():void
		{
			viewport = null;
			renderHitData = null;
			currentDisplayObject3D = null;
			currentMaterial = null;
			currentMouseDO3D = null;
			
			container.removeEventListener(MouseEvent.MOUSE_DOWN, handleMousePress);
			container.removeEventListener(MouseEvent.MOUSE_UP, handleMouseRelease);
			container.removeEventListener(MouseEvent.CLICK, handleMouseClick);
			container.removeEventListener(MouseEvent.DOUBLE_CLICK, handleMouseDoubleClick);
			if (container.stage)
				container.stage.removeEventListener(Event.ENTER_FRAME, handleEnterFrame);
			container = null;
		}
		
		public function init():void
		{		
			if( container )
			{
				if( container.stage )
				{	
					initVirtualMouse();
					initListeners();
				}else
				{
					container.addEventListener(Event.ADDED_TO_STAGE, handleAddedToStage);
				}				
			}
		}
		
		/**
		 * @private
		 * @param e
		 * 
		 */		
		protected function handleAddedToStage(e:Event):void
		{			
			initVirtualMouse();			
			initListeners();
		}
		
		protected function initVirtualMouse():void
		{
			// set the virtualMouse stage
			virtualMouse.stage = container.stage;
			virtualMouse.container = container; // might set this to stage later
		}
		
		public function initListeners():void
		{
			if( viewport.interactive )
			{
				// setup listeners
				container.addEventListener(MouseEvent.MOUSE_DOWN, handleMousePress, false, 0, true);
				container.addEventListener(MouseEvent.MOUSE_UP, handleMouseRelease, false, 0, true);
				container.addEventListener(MouseEvent.CLICK, handleMouseClick, false, 0, true);
				container.addEventListener(MouseEvent.DOUBLE_CLICK, handleMouseDoubleClick, false, 0, true);
				container.stage.addEventListener(Event.ENTER_FRAME, handleEnterFrame);
				
			}
		}
		
		public function updateRenderHitData():void
		{
			resolveRenderHitData();
			
			currentDisplayObject3D = renderHitData.displayObject3D;
			currentMaterial = renderHitData.material;
			
			// when we move the mouse, we assess if there is need to dispatch Over/Out calls
			manageOverOut();
		}
		
		protected function manageOverOut():void
		{
			if( !enableOverOut ) return;
			
			if(renderHitData && renderHitData.hasHit)
			{
				if( !currentMouseDO3D && currentDisplayObject3D ) 
				{
					handleMouseOver(currentDisplayObject3D);
					currentMouseDO3D = currentDisplayObject3D;
				}
				else if( currentMouseDO3D && currentMouseDO3D != currentDisplayObject3D )
				{
					handleMouseOut(currentMouseDO3D);
					handleMouseOver(currentDisplayObject3D);
					currentMouseDO3D = currentDisplayObject3D;
				}
			}
			else
			{
				if( currentMouseDO3D != null )
				{
					handleMouseOut(currentMouseDO3D);
					currentMouseDO3D = null;
				}
			}
		}
		
		protected function resolveRenderHitData():void
		{
			renderHitData = viewport.hitTestPoint2D(currentMousePos) as RenderHitData;
		}
		
		/**
		 * Handles the MOUSE_DOWN event on an InteractiveSprite container
		 * @param e
		 * 
		 */		
		protected function handleMousePress(e:MouseEvent):void
		{
			if( e is IVirtualMouseEvent ) return;
			MOUSE_IS_DOWN = true;
			if( virtualMouse ) virtualMouse.press();
			if( Mouse3D.enabled && renderHitData && renderHitData.renderable != null ) mouse3D.updatePosition(renderHitData);
			if( renderHitData && renderHitData.hasHit ) dispatchObjectEvent(InteractiveScene3DEvent.OBJECT_PRESS, currentDisplayObject3D);
		}
		/**
		 * Handles the MOUSE_UP event on an InteractiveSprite container
		 * @param e
		 * 
		 */		
		protected function handleMouseRelease(e:MouseEvent):void
		{
			if( e is IVirtualMouseEvent ) return;
			MOUSE_IS_DOWN = false;
			if( virtualMouse ) virtualMouse.release();
			if( Mouse3D.enabled && renderHitData && renderHitData.renderable != null ) mouse3D.updatePosition(renderHitData);
			if( renderHitData && renderHitData.hasHit ) dispatchObjectEvent(InteractiveScene3DEvent.OBJECT_RELEASE, currentDisplayObject3D);
		}
		/**
		 * Handles the MOUSE_CLICK event on an InteractiveSprite container
		 * @param e
		 * 
		 */		
		protected function handleMouseClick(e:MouseEvent):void
		{
			if( e is IVirtualMouseEvent ) return;
			if( renderHitData && renderHitData.hasHit ) dispatchObjectEvent(InteractiveScene3DEvent.OBJECT_CLICK, currentDisplayObject3D);
		}
		/**
		 * Handles the MOUSE_CLICK event on an InteractiveSprite container
		 * @param e
		 * 
		 */		
		protected function handleMouseDoubleClick(e:MouseEvent):void
		{
			if( e is IVirtualMouseEvent ) return;
			if( renderHitData && renderHitData.hasHit ) dispatchObjectEvent(InteractiveScene3DEvent.OBJECT_DOUBLE_CLICK, currentDisplayObject3D);
		}
		/**
		 * Handles the MOUSE_OVER event on an InteractiveSprite container
		 * @param e
		 * 
		 */		
		
		protected function handleMouseOver(DO3D:DisplayObject3D):void
		{
			dispatchObjectEvent(InteractiveScene3DEvent.OBJECT_OVER, DO3D);
		}
		
		/**
		 * Handles the MOUSE_OUT event on an InteractiveSprite container
		 * @param e
		 * 
		 */		
		protected function handleMouseOut(DO3D:DisplayObject3D):void
		{
			if( DO3D ) 
			{
				var mat:MovieMaterial = DO3D.material as MovieMaterial;
				if( mat ) virtualMouse.exitContainer();
			}
			
			dispatchObjectEvent(InteractiveScene3DEvent.OBJECT_OUT, DO3D);	
		}
		
		public function updateAfterRender() : void
		{
			_viewportRendered = true; 
		}
		
		/**
		 * This handles the MOUSE_MOVE event on an InteractiveSprite container
		 * and replaces handleMouseMove. 
		 * 
		 * By using ENTER_FRAME and manually checking for mouse movement we should save CPU.
		 * 
		 * @param e
		 * 
		 */		
		protected function handleEnterFrame(e:Event):void
		{
			currentMousePos.x = container.mouseX;
			currentMousePos.y = container.mouseY;
		
			var mousemoved:Boolean = !currentMousePos.equals(lastMousePos); 
			
			if(mousemoved || _viewportRendered) 
			{
				
				updateRenderHitData();
				_viewportRendered = false; 
				
				if( e is IVirtualMouseEvent ) return;
				if( virtualMouse && renderHitData )
				{
					// locate the material's movie
					var mat:MovieMaterial = currentMaterial as MovieMaterial;
					
					if( mat )
					{
						//log.debug("found moviematerial, setting as container", container.name, mat.name);
						// set the location where the calcs should be performed
						virtualMouse.container = mat.movie as Sprite;
					}
					
					// update virtual mouse so it can test
					if( virtualMouse.container ) virtualMouse.setLocation(renderHitData.u, renderHitData.v);
					
					// update the position mouse3D
					if( Mouse3D.enabled && renderHitData && renderHitData.hasHit ) mouse3D.updatePosition(renderHitData);
					
					dispatchObjectEvent(InteractiveScene3DEvent.OBJECT_MOVE, currentDisplayObject3D);
				}
				else if( renderHitData && renderHitData.hasHit )
				{
					dispatchObjectEvent(InteractiveScene3DEvent.OBJECT_MOVE, currentDisplayObject3D);
				}
				
			}
			
			lastMousePos.x = currentMousePos.x; 
			lastMousePos.y = currentMousePos.y; 
			
		}
		
		/**
		 * @private
		 * @param event
		 * @param currentTarget
		 * 
		 */		
		protected function dispatchObjectEvent(event:String, DO3D:DisplayObject3D):void
		{
			
			if(renderHitData && renderHitData.hasHit) 
			{
				var x:Number = renderHitData.u ? renderHitData.u : 0;
				var y:Number = renderHitData.v ? renderHitData.v : 0;
				dispatchEvent(new InteractiveScene3DEvent(event, DO3D, container, renderHitData.renderable as Triangle3D, x, y));
				DO3D.dispatchEvent(new InteractiveScene3DEvent(event, DO3D, container, renderHitData.renderable as Triangle3D, x, y));
			} else 
			{
				dispatchEvent(new InteractiveScene3DEvent(event, DO3D, container));
				if( DO3D ) DO3D.dispatchEvent(new InteractiveScene3DEvent(event, DO3D, container));
			}
		}
	}	
}