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

/**** 
* Classes
****/ 
var AmmoBox = Container.expand(function () {
	var self = Container.call(this);
	var ammoBoxGraphics = self.attachAsset('ammoBox', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 4;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Asteroid = Container.expand(function () {
	var self = Container.call(this);
	var asteroidGraphics = self.attachAsset('asteroid', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.rotationSpeed = 0.02;
	self.update = function () {
		self.y += self.speed;
		asteroidGraphics.rotation += self.rotationSpeed;
	};
	return self;
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -12;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Explosion = Container.expand(function () {
	var self = Container.call(this);
	var explosionGraphics = self.attachAsset('explosion', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.lifetime = 30;
	self.age = 0;
	self.update = function () {
		self.age++;
		explosionGraphics.alpha = 1 - self.age / self.lifetime;
		explosionGraphics.scaleX = explosionGraphics.scaleY = 1 + self.age / self.lifetime * 0.5;
	};
	return self;
});
var Ship = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('ship', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000A1A
});

/**** 
* Game Code
****/ 
var ship = new Ship();
var bullets = [];
var asteroids = [];
var explosions = [];
var ammoBoxes = [];
var gameTime = 0;
var asteroidSpawnTimer = 0;
var bulletFireTimer = 0;
var difficultyLevel = 1;
var powerUpActive = false;
var powerUpTimer = 0;
var powerUpDuration = 600; // 10 seconds at 60fps
var normalFireRate = 15;
var powerUpFireRate = 7;
var normalBulletCount = 1;
var powerUpBulletCount = 2;
var normalBulletSpeed = -12;
var powerUpBulletSpeed = -24;
// Initialize ship position
ship.x = 2048 / 2;
ship.y = 2732 - 150;
game.addChild(ship);
// Score display
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Dragging variables
var dragNode = null;
var dragOffset = 0;
function handleMove(x, y, obj) {
	if (dragNode) {
		var newX = x + dragOffset;
		// Keep ship within screen bounds
		newX = Math.max(90, Math.min(2048 - 90, newX));
		dragNode.x = newX;
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	// Calculate offset from ship center to touch point
	dragOffset = ship.x - x;
	dragNode = ship;
	handleMove(x, y, obj);
};
game.up = function (x, y, obj) {
	dragNode = null;
	dragOffset = 0;
};
function spawnAsteroid() {
	var asteroid = new Asteroid();
	asteroid.x = Math.random() * (2048 - 180) + 90;
	asteroid.y = -40;
	asteroid.speed = 3 + Math.random() * 2 + difficultyLevel * 0.5;
	asteroid.rotationSpeed = (Math.random() - 0.5) * 0.1;
	asteroids.push(asteroid);
	game.addChild(asteroid);
}
function spawnBullet() {
	var bulletCount = powerUpActive ? powerUpBulletCount : normalBulletCount;
	var spacing = 40; // Space between bullets when firing multiple
	for (var i = 0; i < bulletCount; i++) {
		var bullet = new Bullet();
		if (bulletCount === 1) {
			bullet.x = ship.x;
		} else {
			// Spread bullets evenly around ship center
			var offset = (i - (bulletCount - 1) / 2) * spacing;
			bullet.x = ship.x + offset;
		}
		bullet.y = ship.y - 40;
		bullet.speed = powerUpActive ? powerUpBulletSpeed : normalBulletSpeed;
		bullets.push(bullet);
		game.addChild(bullet);
	}
	LK.getSound('shoot').play();
}
function spawnAmmoBox(x, y) {
	var ammoBox = new AmmoBox();
	ammoBox.x = x;
	ammoBox.y = y;
	ammoBoxes.push(ammoBox);
	game.addChild(ammoBox);
}
function spawnExplosion(x, y) {
	var explosion = new Explosion();
	explosion.x = x;
	explosion.y = y;
	explosions.push(explosion);
	game.addChild(explosion);
}
function updateScore() {
	scoreTxt.setText('Score: ' + LK.getScore());
}
game.update = function () {
	gameTime++;
	// Increase difficulty over time
	difficultyLevel = Math.floor(gameTime / 1800) + 1;
	// Handle power-up timer
	if (powerUpActive) {
		powerUpTimer--;
		if (powerUpTimer <= 0) {
			powerUpActive = false;
		}
	}
	// Spawn bullets
	bulletFireTimer++;
	var currentFireRate = powerUpActive ? powerUpFireRate : normalFireRate;
	if (bulletFireTimer >= currentFireRate) {
		spawnBullet();
		bulletFireTimer = 0;
	}
	// Spawn asteroids
	asteroidSpawnTimer++;
	var spawnRate = Math.max(60 - difficultyLevel * 5, 20);
	if (asteroidSpawnTimer >= spawnRate) {
		spawnAsteroid();
		asteroidSpawnTimer = 0;
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
		// Remove bullets that go off screen
		if (bullet.lastY >= -10 && bullet.y < -10) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		bullet.lastY = bullet.y;
	}
	// Update asteroids
	for (var i = asteroids.length - 1; i >= 0; i--) {
		var asteroid = asteroids[i];
		if (asteroid.lastY === undefined) asteroid.lastY = asteroid.y;
		// Remove asteroids that go off screen
		if (asteroid.lastY <= 2732 + 40 && asteroid.y > 2732 + 40) {
			asteroid.destroy();
			asteroids.splice(i, 1);
			continue;
		}
		// Check collision with ship
		if (asteroid.intersects(ship)) {
			LK.getSound('hit').play();
			LK.effects.flashScreen(0xFF0000, 1000);
			LK.showGameOver();
			return;
		}
		asteroid.lastY = asteroid.y;
	}
	// Update ammo boxes
	for (var i = ammoBoxes.length - 1; i >= 0; i--) {
		var ammoBox = ammoBoxes[i];
		if (ammoBox.lastY === undefined) ammoBox.lastY = ammoBox.y;
		// Remove ammo boxes that go off screen
		if (ammoBox.lastY <= 2732 + 30 && ammoBox.y > 2732 + 30) {
			ammoBox.destroy();
			ammoBoxes.splice(i, 1);
			continue;
		}
		// Check collision with ship
		if (ammoBox.intersects(ship)) {
			LK.getSound('powerup').play();
			powerUpActive = true;
			powerUpTimer = powerUpDuration;
			ammoBox.destroy();
			ammoBoxes.splice(i, 1);
		}
		ammoBox.lastY = ammoBox.y;
	}
	// Update explosions
	for (var i = explosions.length - 1; i >= 0; i--) {
		var explosion = explosions[i];
		if (explosion.age >= explosion.lifetime) {
			explosion.destroy();
			explosions.splice(i, 1);
		}
	}
	// Check bullet-asteroid collisions
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		var bulletHit = false;
		for (var j = asteroids.length - 1; j >= 0; j--) {
			var asteroid = asteroids[j];
			if (bullet.intersects(asteroid)) {
				// Create explosion
				spawnExplosion(asteroid.x, asteroid.y);
				// 30% chance to spawn ammo box
				if (Math.random() < 0.3) {
					spawnAmmoBox(asteroid.x, asteroid.y);
				}
				// Play sound
				LK.getSound('explode').play();
				// Update score
				LK.setScore(LK.getScore() + 10);
				updateScore();
				// Remove bullet and asteroid
				bullet.destroy();
				bullets.splice(i, 1);
				asteroid.destroy();
				asteroids.splice(j, 1);
				bulletHit = true;
				break;
			}
		}
		if (bulletHit) break;
	}
};
// Initialize score display
updateScore();