import flash.events.MouseEvent;
import flash.events.KeyboardEvent;
import flash.events.Event;

var speed:Number = -4;
var moving:Boolean = false;
var swapStatus:Boolean = true;

stage.addEventListener(KeyboardEvent.KEY_DOWN, trapKey);
stage.addEventListener(KeyboardEvent.KEY_UP, releaseKey);
stage.addEventListener(Event.ENTER_FRAME, updStage);
stage.addEventListener(MouseEvent.CLICK, updSwapStatus);

dog.gotoAndStop("stoppedLeft");

function updSwapStatus(evt:MouseEvent)
{
	swapStatus = !swapStatus;
	if(swapStatus == true)
	{
		dog.graphics.clear();
	}
	else
	{
		dog.graphics.beginFill(0xFF0000, 1);
		dog.graphics.drawCircle(0, 0, 10);
	}
}

function updStage(evt:Event):void
{
	if(moving)
	{
		dog.x += speed;
		if(swapStatus == true)
		{
			for(var ch = 0; ch <= numChildren - 1; ch++)
			{
				var tempChild = getChildAt(ch);
				if(tempChild.name != "dog")
				{
					if(tempChild.hitTestObject(dog))
					   {
						   if(getChildIndex(tempChild) != numChildren - 1)
						   {
							   //using setChildIndex and getChildIndex, set the index of the dog movie clip to the index of the tempChild + 1
							   // set index to be one higher than what object collided with dog
							   setChildIndex(dog, getChildIndex(tempChild) + 1);

						   }
						   else
						   {
							   //using the swapChildren method swap indexes with the dog and the tempChild movie clips
							   swapChildren(dog, tempChild);

						   }
						   updateIndexes();
					   }
				}
			}
		}
	}
}

function releaseKey(evt:KeyboardEvent)
{
	if(evt.keyCode == 37 || evt.keyCode == 39)
	{
		moving = false;
		if(speed < 0)
		{
			dog.gotoAndStop("stoppedLeft");
		}
		else
		{
			dog.gotoAndStop("stoppedRight");
		}
	}
}

function trapKey(evt:KeyboardEvent):void
{
	if(evt.keyCode == 39)
	{
		if(!moving)
		{
			speed = 4;
			dog.gotoAndPlay("runningRight");
		}
		moving = true;
	}

	if(evt.keyCode == 37)
	{
		if(!moving)
		{
			speed = -4;
			dog.gotoAndPlay("runningLeft");
		}
		moving = true;
	}
}

function updateIndexes()
{
	for(var c = 0; c <= numChildren -1; c++)
	{
		var tempChild = getChildAt(c);
		tempChild.idNum.text = String(getChildIndex(tempChild));
	}
}

updateIndexes();