/**** 
* Classes
****/ 
// Define a class for bullets
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 15;
	self.update = function () {
		self.y -= self.speed;
	};
});
// Assets will be automatically created and loaded by the LK engine based on their usage in the code.
// Define a class for the player character
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.update = function () {
		self.y += self.speed;
	};
});
// Define a class for zombies
var Zombie = Container.expand(function () {
	var self = Container.call(this);
	var zombieGraphics = self.attachAsset('zombie', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.update = function () {
		self.y += self.speed;
	};
});

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

/**** 
* Game Code
****/ 
// Add background image
var background = LK.getAsset('backgroundImage', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 2732 / 2
});
game.addChild(background);
// Create and display the kill count text
var killCountText = new Text2('Kills: 0', {
	size: 100,
	fill: "#ffffff"
});
killCountText.anchor.set(0.5, 0);
LK.gui.top.addChild(killCountText);
// Initialize player with speed boost
var player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2732 - 200;
var speedBoostActive = false;
var speedBoostDuration = 5000; // 5 seconds
var speedBoostCooldown = 10000; // 10 seconds
var lastSpeedBoostTime = 0;
// Function to activate speed boost
function activateSpeedBoost() {
	if (!speedBoostActive && LK.ticks - lastSpeedBoostTime > speedBoostCooldown) {
		speedBoostActive = true;
		player.speed *= 2; // Double the player's speed
		lastSpeedBoostTime = LK.ticks;
		LK.setTimeout(function () {
			player.speed /= 2; // Reset the player's speed
			speedBoostActive = false;
		}, speedBoostDuration);
	}
}
// Initialize kill count
var killCount = 0;
// Initialize leaderboard
var leaderboard = new Text2('Leaderboard:\n1. Player1 - 100\n2. Player2 - 80\n3. Player3 - 60', {
	size: 80,
	fill: "#ffffff"
});
leaderboard.anchor.set(0.5, 0);
LK.gui.topRight.addChild(leaderboard);
// Initialize arrays for zombies and bullets
var zombies = [];
var bullets = [];
// Function to spawn a zombie
function spawnZombie() {
	var zombie = new Zombie();
	zombie.x = Math.random() * 2048;
	zombie.y = -50;
	zombies.push(zombie);
	game.addChild(zombie);
}
// Function to handle shooting
function shootBullet() {
	var bullet = new Bullet();
	bullet.x = player.x;
	bullet.y = player.y;
	bullets.push(bullet);
	game.addChild(bullet);
}
// Game update logic
game.update = function () {
	// Update player
	player.update();
	// Update zombies
	for (var i = zombies.length - 1; i >= 0; i--) {
		zombies[i].update();
		if (zombies[i].y > 2732) {
			// Flash screen red for 1 second to indicate game over
			LK.effects.flashScreen(0xff0000, 1000);
			// Show game over screen
			LK.showGameOver();
			return; // Exit update loop
		}
		// Check for collision between player and zombies
		if (player.intersects(zombies[i])) {
			// Flash screen red for 1 second to indicate player death
			LK.effects.flashScreen(0xff0000, 1000);
			// Show game over screen
			LK.showGameOver();
			return; // Exit update loop
		}
	}
	// Update bullets
	for (var j = bullets.length - 1; j >= 0; j--) {
		bullets[j].update();
		if (bullets[j].y < 0) {
			bullets[j].destroy();
			bullets.splice(j, 1);
		}
	}
	// Check for collisions between bullets and zombies
	for (var k = bullets.length - 1; k >= 0; k--) {
		for (var l = zombies.length - 1; l >= 0; l--) {
			if (bullets[k].intersects(zombies[l])) {
				bullets[k].destroy();
				zombies[l].destroy();
				bullets.splice(k, 1);
				zombies.splice(l, 1);
				killCount++;
				killCountText.setText('Kills: ' + killCount);
				break;
			}
		}
	}
	// Spawn zombies periodically
	if (LK.ticks % 60 === 0) {
		spawnZombie();
	}
};
// Handle player movement
game.move = function (x, y, obj) {
	player.x = x;
	player.y = y;
};
// Handle shooting
game.down = function (x, y, obj) {
	shootBullet();
	activateSpeedBoost();
};