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

/**** 
* Classes
****/ 
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 4;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var EnemyShip = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('enemyShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.fireRate = 120;
	self.fireTimer = Math.random() * 120;
	self.movePattern = 0;
	self.timeAlive = 0;
	self.update = function () {
		self.timeAlive++;
		if (self.movePattern === 0) {
			self.y += self.speed;
		} else if (self.movePattern === 1) {
			self.y += self.speed;
			self.x += Math.sin(self.timeAlive * 0.05) * 2;
		}
		if (self.fireTimer > 0) {
			self.fireTimer--;
		} else {
			self.fire();
			self.fireTimer = self.fireRate;
		}
	};
	self.fire = function () {
		var bullet = new EnemyBullet();
		bullet.x = self.x;
		bullet.y = self.y;
		enemyBullets.push(bullet);
		game.addChild(bullet);
	};
	return self;
});
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -12;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var PlayerShip = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('playerShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.fireRate = 15;
	self.fireTimer = 0;
	self.shield = false;
	self.multiShot = false;
	self.powerUpTimer = 0;
	self.update = function () {
		if (self.fireTimer > 0) {
			self.fireTimer--;
		}
		if (self.powerUpTimer > 0) {
			self.powerUpTimer--;
			if (self.powerUpTimer <= 0) {
				self.multiShot = false;
				self.shield = false;
				shipGraphics.tint = 0xffffff;
			}
		}
		if (self.shield) {
			shipGraphics.tint = 0x00ffff;
		} else if (self.multiShot) {
			shipGraphics.tint = 0xffff00;
		}
	};
	self.down = function (x, y, obj) {
		// Cancel any active powerup when player taps on the ship
		if (self.powerUpTimer > 0) {
			self.powerUpTimer = 0;
			self.multiShot = false;
			self.shield = false;
			shipGraphics.tint = 0xffffff;
		}
	};
	self.fire = function () {
		if (self.fireTimer <= 0) {
			if (self.multiShot) {
				var bullet1 = new PlayerBullet();
				bullet1.x = self.x - 20;
				bullet1.y = self.y;
				playerBullets.push(bullet1);
				game.addChild(bullet1);
				var bullet2 = new PlayerBullet();
				bullet2.x = self.x;
				bullet2.y = self.y;
				playerBullets.push(bullet2);
				game.addChild(bullet2);
				var bullet3 = new PlayerBullet();
				bullet3.x = self.x + 20;
				bullet3.y = self.y;
				playerBullets.push(bullet3);
				game.addChild(bullet3);
			} else {
				var bullet = new PlayerBullet();
				bullet.x = self.x;
				bullet.y = self.y;
				playerBullets.push(bullet);
				game.addChild(bullet);
			}
			LK.getSound('shoot').play();
			self.fireTimer = self.fireRate;
		}
	};
	return self;
});
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	var powerUpGraphics = self.attachAsset('powerUp', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.type = 'shield';
	self.rotationSpeed = 0.1;
	self.update = function () {
		self.y += self.speed;
		powerUpGraphics.rotation += self.rotationSpeed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000011
});

/**** 
* Game Code
****/ 
var player = null;
var playerBullets = [];
var enemyShips = [];
var enemyBullets = [];
var powerUps = [];
var enemySpawnTimer = 0;
var powerUpSpawnTimer = 0;
var waveTimer = 0;
var difficulty = 1;
var dragNode = null;
var scoreText = new Text2('0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
var waveText = new Text2('Wave 1', {
	size: 40,
	fill: 0xFFFF00
});
waveText.anchor.set(0, 0);
waveText.x = 50;
waveText.y = 50;
LK.gui.topLeft.addChild(waveText);
player = game.addChild(new PlayerShip());
player.x = 1024;
player.y = 2500;
LK.playMusic('bgMusic');
function spawnEnemy() {
	var enemy = new EnemyShip();
	enemy.x = Math.random() * (2048 - 120) + 60;
	enemy.y = -30;
	enemy.speed = 2 + difficulty * 0.5;
	enemy.movePattern = Math.random() < 0.3 ? 1 : 0;
	enemyShips.push(enemy);
	game.addChild(enemy);
}
function spawnPowerUp() {
	var powerUp = new PowerUp();
	powerUp.x = Math.random() * (2048 - 80) + 40;
	powerUp.y = -20;
	powerUp.type = Math.random() < 0.5 ? 'shield' : 'multiShot';
	if (powerUp.type === 'multiShot') {
		powerUp.getChildAt(0).tint = 0xffff00;
	}
	powerUps.push(powerUp);
	game.addChild(powerUp);
}
function handleMove(x, y, obj) {
	player.x = Math.max(40, Math.min(2008, x));
	player.y = Math.max(40, Math.min(2692, y));
}
game.move = handleMove;
game.update = function () {
	waveTimer++;
	if (waveTimer % 1800 === 0) {
		difficulty++;
		waveText.setText('Wave ' + difficulty);
	}
	enemySpawnTimer++;
	var spawnRate = Math.max(60, 150 - difficulty * 8);
	if (enemySpawnTimer >= spawnRate) {
		spawnEnemy();
		enemySpawnTimer = 0;
	}
	powerUpSpawnTimer++;
	if (powerUpSpawnTimer >= 300) {
		if (Math.random() < 0.7) {
			spawnPowerUp();
		}
		powerUpSpawnTimer = 0;
	}
	player.fire();
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
		if (bullet.lastY >= -20 && bullet.y < -20) {
			bullet.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		bullet.lastY = bullet.y;
	}
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var bullet = enemyBullets[i];
		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
		if (bullet.lastY <= 2732 && bullet.y > 2732) {
			bullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		if (bullet.lastIntersecting === undefined) bullet.lastIntersecting = false;
		var currentIntersecting = bullet.intersects(player);
		if (!bullet.lastIntersecting && currentIntersecting) {
			if (!player.shield) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				return;
			} else {
				bullet.destroy();
				enemyBullets.splice(i, 1);
				continue;
			}
		}
		bullet.lastY = bullet.y;
		bullet.lastIntersecting = currentIntersecting;
	}
	for (var i = enemyShips.length - 1; i >= 0; i--) {
		var enemy = enemyShips[i];
		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
		if (enemy.lastY <= 2732 && enemy.y > 2732) {
			enemy.destroy();
			enemyShips.splice(i, 1);
			continue;
		}
		if (enemy.lastIntersecting === undefined) enemy.lastIntersecting = false;
		var currentIntersecting = enemy.intersects(player);
		if (!enemy.lastIntersecting && currentIntersecting) {
			// Cancel powerup when touching enemy
			if (player.powerUpTimer > 0) {
				player.powerUpTimer = 0;
				player.multiShot = false;
				player.shield = false;
				player.getChildAt(0).tint = 0xffffff;
			}
			if (!player.shield) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				return;
			} else {
				enemy.destroy();
				enemyShips.splice(i, 1);
				LK.setScore(LK.getScore() + 10);
				scoreText.setText(LK.getScore());
				continue;
			}
		}
		for (var j = playerBullets.length - 1; j >= 0; j--) {
			var bullet = playerBullets[j];
			if (bullet.lastEnemyIntersecting === undefined) bullet.lastEnemyIntersecting = [];
			if (bullet.lastEnemyIntersecting[i] === undefined) bullet.lastEnemyIntersecting[i] = false;
			var bulletEnemyIntersecting = bullet.intersects(enemy);
			if (!bullet.lastEnemyIntersecting[i] && bulletEnemyIntersecting) {
				LK.getSound('enemyDestroy').play();
				enemy.destroy();
				enemyShips.splice(i, 1);
				bullet.destroy();
				playerBullets.splice(j, 1);
				LK.setScore(LK.getScore() + 10);
				scoreText.setText(LK.getScore());
				break;
			}
			bullet.lastEnemyIntersecting[i] = bulletEnemyIntersecting;
		}
		if (i < enemyShips.length) {
			enemy.lastY = enemy.y;
			enemy.lastIntersecting = currentIntersecting;
		}
	}
	for (var i = powerUps.length - 1; i >= 0; i--) {
		var powerUp = powerUps[i];
		if (powerUp.lastY === undefined) powerUp.lastY = powerUp.y;
		if (powerUp.lastY <= 2732 && powerUp.y > 2732) {
			powerUp.destroy();
			powerUps.splice(i, 1);
			continue;
		}
		if (powerUp.lastIntersecting === undefined) powerUp.lastIntersecting = false;
		var currentIntersecting = powerUp.intersects(player);
		if (!powerUp.lastIntersecting && currentIntersecting) {
			LK.getSound('powerUpCollect').play();
			if (powerUp.type === 'shield') {
				player.shield = true;
			} else if (powerUp.type === 'multiShot') {
				player.multiShot = true;
			}
			player.powerUpTimer = 600;
			powerUp.destroy();
			powerUps.splice(i, 1);
			continue;
		}
		powerUp.lastY = powerUp.y;
		powerUp.lastIntersecting = currentIntersecting;
	}
};