// forked from 5ivestar's forked from: 15 puzzle
// forked from flashrod's 15 puzzle
// photo: Ville Miettinen's Grundvik main house
// http://www.flickr.com/photos/wili/214317898/

package {
	import flash.display.Sprite;
	import flash.display.Loader;
	import flash.display.BitmapData;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.geom.Matrix;
	import flash.net.URLRequest;
	import flash.system.LoaderContext;
	import caurina.transitions.Tweener;
	public class Fifteen extends Sprite {
		private static const W:int = 465;
		private static const H:int = 465;
		private static const U:int = int(W/4);
		private static const V:int = int(H/4);
		private var board:Array = [];
		private var loader:Loader;

public function Fifteen() {
			loader = new Loader();
			var context:LoaderContext = new LoaderContext(true);
			loader.contentLoaderInfo.addEventListener("complete", loadingComplete);
			loader.load(new URLRequest("http://img.f.hatena.ne.jp/maton_1128/20091212173607"), context);
		}

public function loadingComplete(e:Event):void {
			var source:BitmapData = new BitmapData(W, H, false);
			var sx:Number = W / loader.width;
			var sy:Number = H / loader.height;
			if (sx > sy) {
				source.draw(loader, new Matrix(sx, 0, 0, sx, 0, (H - loader.height * sx) / 2), null, null, null, true);
			} else {
				source.draw(loader, new Matrix(sy, 0, 0, sy, (W - loader.width * sy) / 2, 0), null, null, null, true);
			}
			for (var k:int = 1; k < 17; ++k) {
				var p:Piece = new Piece(k, source);
				addChild(p);
				board.push(p);
			}
			var i:int, j:int = 3;
			for (k = 0; k < 20; ++k) {
				i = int(Math.random()*3);
				shift(i, j);
				j = int(Math.random()*3);
				shift(i, j);
			}
			stage.addEventListener(MouseEvent.CLICK, function(e:MouseEvent):void {
				shift(e.stageX/U, e.stageY/V);
				repaint();
			});
			repaint();
		}
		private function shift(x:int, y:int):void {
			if (x>=0 && x<4 && y>=0 && y<4) {
				for (var i:int = 0; i < 4; ++i) {
					var p:Piece = board[y*4+i];
					if (p.value == 16) {
						for (; i>x; --i)
							board[y*4+i] = board[y*4+i-1];
						for (; i<x; ++i)
							board[y*4+i] = board[y*4+i+1];
						board[y*4+x] = p;
						return;
					}
				}
				for (var j:int = 0; j<4; ++j) {
					p = board[j*4+x];
					if (p.value == 16) {
						for (; j>y; --j)
							board[j*4+x] = board[(j-1)*4+x];
						for (; j<y; ++j)
							board[j*4+x] = board[(j+1)*4+x];
						board[y*4+x] = p;
						return;
					}
				}
			}
		}
		private function repaint():void {
			for (var j:int = 0; j < 4; ++j) {
				for (var i:int = 0; i < 4; ++i) {
					var p:Piece = board[j*4+i];
					//p.x = i*U;
					//p.y = j*V;
					Tweener.addTween(p, {x:i*U, y:j*V, time:0.1, transition:"easeOutQuad"});
				}
			}
		}
	}
}

import flash.display.Sprite;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.geom.Point;
import flash.geom.Rectangle;
class Piece extends Sprite {
	public var value:int;
	public function Piece(value:int, source:BitmapData) {
		this.value = value;
		if (value == 16) return;
		var w:Number = source.width / 4;
		var h:Number = source.height / 4;
		var bitmap:BitmapData = new BitmapData(w, h, false);
		var rect:Rectangle = new Rectangle((value-1)%4*w, Math.floor(value/4)*h, w, h);
		bitmap.copyPixels(source, rect, new Point());
		addChild(new Bitmap(bitmap));
	}
}

forked from: forked from: 15 puzzle