/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var Block = Container.expand(function () {
	var self = Container.call(this);
	var blockGraphics = self.attachAsset('block', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.lastY = 0;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x222222
});

/**** 
* Game Code
****/ 
// Add landscape background
var landscape = LK.getAsset('landscape', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
});
game.addChild(landscape);
var player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2732 - 150;
var blocks = [];
var blockSpawnTimer = 0;
var blockSpawnDelay = 60;
var gameSpeed = 1;
var survivalTime = 0;
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var dragNode = null;
function handleMove(x, y, obj) {
	if (dragNode) {
		// Convert touch position to game coordinates and move player
		dragNode.x = x;
		// Keep player within screen bounds
		if (dragNode.x < 40) {
			dragNode.x = 40;
		}
		if (dragNode.x > 2048 - 40) {
			dragNode.x = 2048 - 40;
		}
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	dragNode = player;
	handleMove(x, y, obj);
};
game.up = function (x, y, obj) {
	dragNode = null;
};
// Start relaxing background music
LK.playMusic('relaxingMusic');
game.update = function () {
	survivalTime++;
	// Update score based on survival time
	var currentScore = Math.floor(survivalTime / 10);
	LK.setScore(currentScore);
	scoreTxt.setText(LK.getScore());
	// Increase difficulty over time
	if (survivalTime % 300 === 0) {
		gameSpeed += 0.2;
		blockSpawnDelay = Math.max(20, blockSpawnDelay - 3);
	}
	// Spawn blocks
	blockSpawnTimer++;
	if (blockSpawnTimer >= blockSpawnDelay) {
		blockSpawnTimer = 0;
		var newBlock = new Block();
		newBlock.x = Math.random() * (2048 - 120) + 60;
		newBlock.y = -50;
		newBlock.speed = 8 * gameSpeed;
		newBlock.lastY = newBlock.y;
		blocks.push(newBlock);
		game.addChild(newBlock);
	}
	// Update and check blocks
	for (var i = blocks.length - 1; i >= 0; i--) {
		var block = blocks[i];
		// Check if block went off screen
		if (block.lastY <= 2732 + 50 && block.y > 2732 + 50) {
			block.destroy();
			blocks.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (block.intersects(player)) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
		block.lastY = block.y;
	}
};