/**** 
* Classes
****/ 
// Bullet class for the spaceship
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('3D_bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.move = function () {
		self.y -= self.speed;
	};
});
// Enemy class
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('3D_enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.shootInterval = null;
	self.move = function () {
		self.y += self.speed;
	};
	self.shoot = function () {
		var enemyBullet = new Bullet();
		enemyBullet.color = 0xFF0000; // Red color for enemy bullets
		enemyBullet.x = self.x;
		enemyBullet.y = self.y + 50; // Start the bullet just below the enemy
		game.addChild(enemyBullet);
		enemyBullets.push(enemyBullet);
	};
	self.startShooting = function () {
		if (!self.shootInterval) {
			self.shootInterval = LK.setInterval(self.shoot, 2000); // Enemy shoots every 2 seconds
		}
	};
	self.stopShooting = function () {
		if (self.shootInterval) {
			LK.clearInterval(self.shootInterval);
			self.shootInterval = null;
		}
	};
});
// Assets will be automatically generated based on usage in the code.
// Player's spaceship class
var Spaceship = Container.expand(function () {
	var self = Container.call(this);
	var spaceshipGraphics = self.attachAsset('3D_spaceship', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.move = function (direction) {
		if (direction === 'left' && self.x > 0) {
			self.x -= self.speed;
		} else if (direction === 'right' && self.x < 2048) {
			self.x += self.speed;
		}
	};
	self.shoot = function () {
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y - 50; // Start the bullet just above the spaceship
		game.addChild(bullet);
		bullets.push(bullet);
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundImage: 'starField' // Set game background to star field
});

/**** 
* Game Code
****/ 
// Light Slate Gray for the spaceship
// White color for laser-like bullets
var spaceship = game.addChild(new Spaceship());
spaceship.x = 1024; // Start in the middle of the screen
spaceship.y = 2500; // Start near the bottom of the screen
var bullets = []; // Player's bullets
var enemyBullets = []; // Enemy's bullets
var enemies = [];
// Touch event to move and shoot
game.on('down', function (obj) {
	var touchPosition = obj.event.getLocalPosition(game);
	if (touchPosition.x < 1024) {
		spaceship.move('left');
	} else {
		spaceship.move('right');
	}
	spaceship.shoot();
});
// Spawn enemies
LK.setInterval(function () {
	var enemy = new Enemy();
	enemy.x = Math.random() * 2048; // Random position across the screen width
	enemy.y = 0; // Start at the top of the screen
	game.addChild(enemy);
	enemy.startShooting(); // Start enemy shooting upon creation
	enemies.push(enemy);
}, 2000); // Spawn an enemy every 2 seconds
// Game tick
LK.on('tick', function () {
	// Move bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		bullets[i].move();
		if (bullets[i].y < 0) {
			bullets[i].destroy();
			bullets.splice(i, 1);
		}
	}
	// Move enemy bullets
	for (var k = enemyBullets.length - 1; k >= 0; k--) {
		enemyBullets[k].move();
		if (enemyBullets[k].y > 2732) {
			enemyBullets[k].destroy();
			enemyBullets.splice(k, 1);
		}
	}
	// Move enemies
	for (var j = enemies.length - 1; j >= 0; j--) {
		enemies[j].move();
		enemies[j].startShooting(); // Start shooting when moving
		if (enemies[j].y > 2732) {
			// If the enemy goes off the bottom of the screen
			enemies[j].stopShooting(); // Stop shooting when destroyed
			enemies[j].destroy();
			enemies.splice(j, 1);
		}
	}
	// Collision detection (simplified)
	bullets.forEach(function (bullet) {
		enemies.forEach(function (enemy, index) {
			if (bullet.intersects(enemy)) {
				enemy.destroy();
				enemies.splice(index, 1);
				bullet.destroy();
				bullets.splice(bullets.indexOf(bullet), 1);
				// Increase score or trigger explosion effect here
			}
		});
	});
});