/**** 
* Classes
****/ 
//<Assets used in the game will automatically appear here>
// Tile class to represent each tile in the game
var Tile = Container.expand(function () {
	var self = Container.call(this);
	self.value = 0; // Initial value of the tile
	self.graphics = self.attachAsset('tile', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.text = new Text2(self.value.toString(), {
		fontSize: 50,
		fill: "#ffffff",
		align: "center"
	});
	self.text.anchor.set(0.5, 0.5);
	self.addChild(self.text);
	self.updateValue = function (newValue) {
		self.value = newValue;
		self.text.setText(self.value.toString());
		// Removed incorrect setText call on graphics object
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000 //Init game with black background
});

/**** 
* Game Code
****/ 
var background = LK.getAsset('background', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 2732 / 2
});
game.addChild(background);
// Initialize game variables
var gridSize = 4;
var tileSize = 200;
var grid = [];
var score = 0;
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Initialize the grid with empty tiles
for (var i = 0; i < gridSize; i++) {
	grid[i] = [];
	for (var j = 0; j < gridSize; j++) {
		var tile = new Tile();
		tile.x = j * tileSize + tileSize / 2;
		tile.y = i * tileSize + tileSize / 2;
		grid[i][j] = tile;
		game.addChild(tile);
	}
}
// Function to add a new tile to the grid
function addNewTile() {
	var emptyTiles = [];
	for (var i = 0; i < gridSize; i++) {
		for (var j = 0; j < gridSize; j++) {
			if (grid[i][j].value === 0) {
				emptyTiles.push(grid[i][j]);
			}
		}
	}
	if (emptyTiles.length > 0) {
		var randomTile = emptyTiles[Math.floor(Math.random() * emptyTiles.length)];
		randomTile.updateValue(2);
	}
}
// Function to handle swipe events
function handleSwipe(direction) {
	var moved = false;
	if (direction === 'left') {
		for (var i = 0; i < gridSize; i++) {
			for (var j = 1; j < gridSize; j++) {
				if (grid[i][j].value !== 0) {
					var k = j;
					while (k > 0 && grid[i][k - 1].value === 0) {
						grid[i][k - 1].updateValue(grid[i][k].value);
						grid[i][k].updateValue(0);
						k--;
						moved = true;
					}
					if (k > 0 && grid[i][k - 1].value === grid[i][k].value) {
						grid[i][k - 1].updateValue(grid[i][k - 1].value * 2);
						grid[i][k].updateValue(0);
						score += grid[i][k - 1].value;
						scoreTxt.setText(score.toString());
						moved = true;
					}
				}
			}
		}
	}
	// Handle other directions similarly...
	if (moved) {
		addNewTile();
	}
}
// Event listeners for swipe events
game.down = function (x, y, obj) {
	this.startX = x;
	this.startY = y;
};
game.up = function (x, y, obj) {
	var deltaX = x - this.startX;
	var deltaY = y - this.startY;
	if (Math.abs(deltaX) > Math.abs(deltaY)) {
		if (deltaX > 0) {
			handleSwipe('right');
		} else {
			handleSwipe('left');
		}
	} else {
		if (deltaY > 0) {
			handleSwipe('down');
		} else {
			handleSwipe('up');
		}
	}
};
// Initialize the game with two tiles
addNewTile();
addNewTile();