package  
{
	import org.flixel.*;
	
	public class test extends FlxState 
	{
		private var sprites:FlxGroup = new FlxGroup();
		
		override public function create():void 
		{
			FlxG.bgColor = 0xff333333;
			
			const SPRITES_PER_ROW:uint = 15;
			const SPRITE_SPACING:uint = 20;
			var sprite:FlxSprite;
			for (var i:uint = 0; i < 100; i++)
			{
				sprite = new FlxSprite();
				sprite.makeGraphic(10, 10);
				sprite.x = 30 + SPRITE_SPACING * (i - FlxU.floor(i / SPRITES_PER_ROW) * SPRITES_PER_ROW);
				sprite.y = 30 + SPRITE_SPACING * FlxU.floor(i / SPRITES_PER_ROW);
				sprite.velocity.x = -100 + FlxG.random() * 200;
				sprite.velocity.y = -100 + FlxG.random() * 200;
				sprites.add(sprite);
			}
			
			sprite = new FlxSprite();
			sprite.makeGraphic(Main.WIDTH, 10, 0xffff0000);
			sprite.immovable = true;
			sprite.ID = 1;
			sprites.add(sprite);
			
			sprite = new FlxSprite();
			sprite.makeGraphic(Main.WIDTH, 10, 0xffff0000);
			sprite.y = Main.HEIGHT - sprite.height;
			sprite.immovable = true;
			sprite.ID = 2;
			sprites.add(sprite);
			
			sprite = new FlxSprite();
			sprite.makeGraphic(10, Main.HEIGHT, 0xffff0000);
			sprite.immovable = true;
			sprite.ID = 3;
			sprites.add(sprite);
			
			sprite = new FlxSprite();
			sprite.makeGraphic(10, Main.HEIGHT, 0xffff0000);
			sprite.x = Main.WIDTH - sprite.width;
			sprite.immovable = true;
			sprite.ID = 4;
			sprites.add(sprite);
			
			add(sprites);
		}

		override public function update():void 
		{
			super.update();
			
			FlxG.overlap(sprites, sprites, handleOverlap);
		}
		
		private function handleOverlap(A:FlxSprite, B:FlxSprite):void
		{
			if (!A.immovable || !B.immovable)
			{
				if (A.immovable || B.immovable)
				{
					var wall:FlxSprite;
					var ball:FlxSprite;
					if (A.immovable) { wall = A; ball = B; }
					if (B.immovable) { wall = B; ball = A; }
					if (wall.ID == 1) { ball.velocity.y *= -1; ball.y = 10; }
					if (wall.ID == 2) { ball.velocity.y *= -1; ball.y = Main.HEIGHT - ball.height - 10; }
					if (wall.ID == 3) { ball.velocity.x *= -1; ball.x = 10; }
					if (wall.ID == 4) { ball.velocity.x *= -1; ball.x = Main.WIDTH - ball.width - 10; }
				}
				else
				{
					FlxObject.separate(A, B);
				}
			}
		}
	}
}