/* 

*/

package {
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.KeyboardEvent;
	import flash.ui.Keyboard;

	public class prePlat extends Sprite {
		private var me, dead:Sprite;
		private var vx, vy:Number;
		private var facingLeft:int;
		private var thePrize:prize;
		
		private var plats:Array;
		private var enemies:Array;
		
		// stage size
		private const winSzX = 550;
		private const winSzY = 550;
		private const mySpeed = 24; /// how strong my jump is
		private const numberPlats = 4; // number of platforms
		private const numberEnemies = 5; // number of platforms
		
		// initialization
		public function prePlat() {
			var i:int;
			var dx, dy:Number;
			
			vx = 0.0;
			vy = 0.0;
			facingLeft = 0;
			
			plats = new Array(numberPlats);
			
			dx = 50; 
			dy = 300;
			plats[0] = new platform(dx, dy);
			addChild(plats[0]);
			dx = 200;
			plats[1] = new platform(dx, dy);
			addChild(plats[1]);
			dx = 350;
			plats[2] = new platform(dx, dy);
			addChild(plats[2]);
			dx = 500;
			plats[3] = new platform(dx, dy);
			addChild(plats[3]);
			
			

			// a pool of blood
			dead = new deadSymbol();
			dead.x = -2000; // initially off-screen
			dead.y = 100;
			addChild(dead);


			enemies = new Array(numberEnemies);
			for (i=0; i<numberEnemies; ++i) {
				// put platforms on a 4x5 grid
				dx = Math.random()*4.0;
				dx = Math.floor(dx) *120;
				dy = Math.random()*5.0;
				dy = Math.floor(dy)*80;
				enemies[i] = new enemy(dx, dy);
				addChild(enemies[i]);
			}

			// the prize
			dx = Math.random() * 400.0;
			dy = Math.random() * 400.0;
			thePrize = new prize(dx, dy);
			addChild(thePrize);
						
			// yourself
			me = new meSymbol();
			me.x = 100; 
			me.y = 100;
			addChild(me);
						
			stage.addEventListener(Event.ENTER_FRAME, frameHandler);
			stage.addEventListener(KeyboardEvent.KEY_DOWN, keyHandler); 
		}
		
		
		private function keyHandler(event:KeyboardEvent):void {
			var i:int;
			// move yourself with the arrow keys
			if (event.keyCode == Keyboard.LEFT) 	{ vx = vx - mySpeed; facingLeft = 1; }///
			if (event.keyCode == Keyboard.RIGHT) 	{ vx = vx + mySpeed; facingLeft = 0; }
			
			if (event.keyCode == Keyboard.UP) 		{ 
				// we can jump off the floor!
				if (me.y>380) { vy = vy - (3*mySpeed); } 
				for (i=0; i<numberPlats; ++i) {
					// we can jump if we're on a platform
					if (plats[i].onIt(me.x, me.y)==1) { 
						vy = vy - (3*mySpeed); 
					} 
				}
			}
			if (event.keyCode == Keyboard.DOWN) 	{ vy = vy + mySpeed; } // allow?
			if (event.keyCode == Keyboard.SPACE)  	{ }			
		}
		
		
		// do this every frame
		private function frameHandler(event:Event):void {
			var dx, dy:Number;
			var i:int;
			
			for (i=0; i<numberEnemies; ++i) {
				enemies[i].updater(me.x, me.y);

				if (enemies[i].killedMe(me.x, me.y)==1) { 
					dead.x = me.x;
					dead.y = me.y;
				} 
			}
			
			thePrize.updater();
			if (thePrize.touched(me.x, me.y)==1) { 
				thePrize.explode();
			} 
			// use velocity to change position
			me.x = me.x + vx;///
			me.y = me.y + vy;
			
			// friction
			vx = vx * .8;
			vy = vy * .8;
			
			// gravity
			vy = vy + 6.0;
			
			// colliding with the sides of the screen
			//if (me.x<0) { me.x=0; vx=vx*-1; }
			//if (me.x>550) { me.x=550; vx=vx*-1; }
			//if (me.y<0) { me.y=0; vy=vy*-1; }
			if (me.y>400) { me.y=400; vy=vy*-.5; }
			

			for (i=0; i<numberPlats; ++i) { 
				if (plats[i].collides(me.x, me.y, vy)==1) { 
					///me.y = 290;
					vy *= -.5;
				}
			}
			
			// wrapping to the other side of the screen
			if (me.x<0) { me.x=550;  }
			if (me.x>550) { me.x=0; }
			//if (me.y<0) { me.y=400;  }
			//if (me.y>400) { me.y=0;  }
			
			
		}
		
	}
}