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

/**** 
* Classes
****/ 
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Enemy properties
	self.health = 1;
	self.speed = 2;
	self.scoreValue = 100;
	self.fireRate = 120; // Ticks between shots
	self.lastShot = Math.floor(Math.random() * 60); // Randomize initial shot timer
	self.movementPattern = Math.floor(Math.random() * 3); // 0: straight, 1: zigzag, 2: circular
	self.movementCounter = 0;
	// Initial target position (will be set during movement)
	self.targetX = null;
	self.update = function () {
		// Basic downward movement
		self.y += self.speed;
		// Apply movement pattern
		if (self.movementPattern === 1) {
			// Zigzag with occasional side movement
			self.x += Math.sin(self.movementCounter * 0.05) * 3;
			// Occasionally move to a different horizontal position
			if (self.movementCounter % 500 === 0) {
				// Choose a new target position on the opposite side
				self.targetX = self.x < GAME_WIDTH / 2 ? GAME_WIDTH * 0.7 + Math.random() * GAME_WIDTH * 0.2 : GAME_WIDTH * 0.1 + Math.random() * GAME_WIDTH * 0.2;
			}
			if (self.targetX) {
				var diffX = self.targetX - self.x;
				if (Math.abs(diffX) > 10) {
					self.x += diffX * 0.03;
				}
			}
			self.movementCounter++;
		} else if (self.movementPattern === 2) {
			// Circular with occasional repositioning
			self.x += Math.sin(self.movementCounter * 0.03) * 4;
			// Occasionally reset position to avoid grouping
			if (self.movementCounter % 700 === 0) {
				// Move to random position on screen
				self.targetX = Math.random() * GAME_WIDTH * 0.8 + GAME_WIDTH * 0.1;
			}
			// Move toward target if exists
			if (self.targetX) {
				var diffX = self.targetX - self.x;
				if (Math.abs(diffX) > 10) {
					self.x += diffX * 0.02;
				}
			}
			self.movementCounter++;
		} else {
			// Add movement for straight pattern (pattern 0)
			if (self.movementCounter % 900 === 0) {
				// Occasional side movement
				self.targetX = Math.random() * GAME_WIDTH * 0.8 + GAME_WIDTH * 0.1;
			}
			// Move toward target if exists
			if (self.targetX) {
				var diffX = self.targetX - self.x;
				if (Math.abs(diffX) > 10) {
					self.x += diffX * 0.01;
				}
			}
			self.movementCounter++;
		}
	};
	// Take damage and check if destroyed
	self.takeDamage = function (amount) {
		self.health -= amount;
		if (self.health <= 0) {
			return true; // Enemy is destroyed
		}
		return false;
	};
	return self;
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 7; // Moving downward
	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,
		alpha: 0.8
	});
	// Explosion duration
	self.duration = 30; // frames
	self.currentFrame = 0;
	// Scale explosion from small to large then fade
	explosionGraphics.scale.x = 0.1;
	explosionGraphics.scale.y = 0.1;
	self.update = function () {
		self.currentFrame++;
		// Expand and then fade
		if (self.currentFrame < 15) {
			explosionGraphics.scale.x += 0.1;
			explosionGraphics.scale.y += 0.1;
		} else {
			explosionGraphics.alpha -= 0.08;
		}
		// Remove when animation complete
		if (self.currentFrame >= self.duration) {
			self.destroy();
			return true;
		}
		return false;
	};
	return self;
});
var FirePool = Container.expand(function () {
	var self = Container.call(this);
	var fireGraphics = self.attachAsset('firePool', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.7
	});
	// Fire pool duration (4 seconds at 60fps)
	self.duration = 240;
	self.currentFrame = 0;
	// Pulsate effect
	self.pulsateDirection = 1;
	self.pulsateAmount = 0;
	self.update = function () {
		self.currentFrame++;
		// Pulsate effect
		self.pulsateAmount += 0.02 * self.pulsateDirection;
		if (self.pulsateAmount > 0.2 || self.pulsateAmount < -0.2) {
			self.pulsateDirection *= -1;
		}
		fireGraphics.scale.x = 1 + self.pulsateAmount;
		fireGraphics.scale.y = 1 + self.pulsateAmount;
		// Fade out at the end
		if (self.currentFrame > 150) {
			fireGraphics.alpha -= 0.03;
		}
		// Check for enemies touching the fire pool
		for (var i = enemies.length - 1; i >= 0; i--) {
			var enemy = enemies[i];
			if (enemy.intersects(self)) {
				// Enemy is instantly destroyed by fire
				score += enemy.scoreValue;
				LK.setScore(score);
				updateScoreDisplay();
				LK.effects.flashObject(enemy, 0xff0000, 300);
				enemy.destroy();
				enemies.splice(i, 1);
			}
		}
		// Remove when duration complete
		if (self.currentFrame >= self.duration) {
			self.destroy();
			return true;
		}
		return false;
	};
	return self;
});
var HealthBar = Container.expand(function () {
	var self = Container.call(this);
	// Health bar properties
	self.maxHealth = 4;
	self.currentHealth = 4;
	self.width = 140;
	self.height = 20;
	// Create background bar (gray)
	var background = self.attachAsset('healthbar', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1,
		// Adjust to match bar width
		scaleY: 1,
		// Adjust to match bar height
		tint: 0x666666 // Gray color
	});
	// Create foreground bar (health indicator - green)
	var foreground = self.attachAsset('healthbar', {
		anchorX: 0,
		anchorY: 0.5,
		scaleX: 1,
		// Adjust to match bar width 
		scaleY: 1,
		// Adjust to match bar height
		tint: 0x00FF00 // Green color
	});
	// Center the foreground bar
	foreground.x = -background.width / 2;
	// Update health bar visual based on current health
	self.updateHealth = function (health) {
		self.currentHealth = health;
		// Update the scale of the foreground bar based on current health
		var healthPercentage = Math.max(self.currentHealth / self.maxHealth, 0);
		// Scale should decrease as health decreases, not increase
		// Ensure that we don't go to 0 until health is actually 0
		if (self.currentHealth > 0) {
			// For non-zero health, ensure we have at least a small visible portion of health bar
			foreground.scale.x = Math.max(healthPercentage, 0.05);
		} else {
			// Only when health is truly zero, set scale to zero
			foreground.scale.x = 0;
		}
		// Change color based on health level
		if (healthPercentage > 0.6) {
			foreground.tint = 0x00FF00; // Green
		} else if (healthPercentage > 0.3) {
			foreground.tint = 0xFFFF00; // Yellow
		} else {
			foreground.tint = 0xFF0000; // Red
		}
	};
	return self;
});
var Missile = Container.expand(function () {
	var self = Container.call(this);
	var missileGraphics = self.attachAsset('missile', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.5,
		scaleY: 1.5
	});
	self.speed = -10; // Moving upward
	self.targetX = null;
	self.targetY = null; // Add targetY for better homing
	self.turnSpeed = 0.25; // Significantly increased turn speed for better tracking
	self.angle = 0; // For side missiles
	self.update = function () {
		// Basic upward movement
		self.y += self.speed;
		// Enhanced target tracking if we have a target
		if (self.targetX && self.targetY) {
			// Calculate distance to target
			var diffX = self.targetX - self.x;
			var diffY = self.targetY - self.y;
			var dist = Math.sqrt(diffX * diffX + diffY * diffY);
			// Track frames since launch for initial trajectory control
			if (self.initialDirectionFrames === undefined) {
				self.initialDirectionFrames = 0;
			}
			// For the first 20 frames, maintain initial trajectory with very minimal homing
			// This ensures missiles start with distinctive paths
			if (self.initialDirectionFrames < 20) {
				self.initialDirectionFrames++;
				// Initial direction based on missile type
				if (self.initialDirection === 'left-up') {
					// Left missile veers slightly left
					self.x -= 2;
					self.y += self.speed * 0.2; // Slow vertical movement slightly
				} else if (self.initialDirection === 'right-up') {
					// Right missile veers slightly right
					self.x += 2;
					self.y += self.speed * 0.2; // Slow vertical movement slightly
				} else {
					// Center missile goes straight up
					// No horizontal movement, just straight up
				}
			} else {
				// After initial frames, apply enhanced homing behavior
				// Use a larger factor for more effective tracking while keeping realistic movement
				var homingFactor = self.turnSpeed * 0.3; // Significantly increased factor for better homing
				// Move more noticeably toward target x position
				self.x += diffX * homingFactor;
				// Also add vertical homing for more direct targeting
				self.y += diffY * (homingFactor * 0.4); // Add vertical component to homing
				// Apply slight angular adjustment to maintain separation
				// This ensures missiles maintain some of their initial trajectory
				if (self.angle) {
					self.x += Math.sin(self.angle) * 0.2; // Further reduced angular influence for better homing
				}
			}
			// Improved y-speed adjustment if target is far above or below
			if (diffY < -150) {
				// Increased speed adjustment for better vertical tracking
				self.y += self.speed * 0.06; // More aggressive speed adjustment
			} else if (diffY > 150) {
				// Increased adjustment if target is below missile
				self.y += self.speed * -0.04; // More noticeable slowdown
			}
		}
	};
	// Create explosion when hitting a target or edge
	self.explode = function () {
		var explosion = new Explosion();
		explosion.x = self.x;
		explosion.y = self.y;
		game.addChild(explosion);
		// Create fire pool after explosion
		var firePool = new FirePool();
		firePool.x = self.x;
		firePool.y = self.y;
		game.addChild(firePool);
		firePools.push(firePool);
		// Play explosion sound
		LK.getSound('explosion').play();
		// Damage enemies in area
		for (var i = enemies.length - 1; i >= 0; i--) {
			var enemy = enemies[i];
			var dx = enemy.x - self.x;
			var dy = enemy.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			// If enemy is within explosion radius
			if (distance < 150) {
				// Enemy is destroyed by area damage
				score += enemy.scoreValue;
				LK.setScore(score);
				updateScoreDisplay();
				LK.effects.flashObject(enemy, 0xff0000, 300);
				enemy.destroy();
				enemies.splice(i, 1);
			}
		}
		return true;
	};
	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 = -20; // Moving upward (increased speed)
	self.power = 1;
	self.direction = 'up'; // up, down, left, right
	self.isPiercing = false;
	self.isBouncing = false;
	self.bounceCount = 0;
	self.maxBounces = 3;
	self.enemyBulletHits = 0; // Track how many enemy bullets this player bullet has hit
	self.maxEnemyBulletHits = 2; // Maximum enemy bullets that can be destroyed before exploding
	self.update = function () {
		// Move bullet based on direction
		if (self.direction === 'up') {
			self.y += self.speed;
			// Check for bouncing against top edge
			if (self.isBouncing && self.y < 0 && self.bounceCount < self.maxBounces) {
				self.direction = 'down';
				self.bounceCount++;
			}
		} else if (self.direction === 'down') {
			self.y -= self.speed; // Note: speed is negative, so this is adding a positive value
			// Check for bouncing against bottom edge
			if (self.isBouncing && self.y > GAME_HEIGHT && self.bounceCount < self.maxBounces) {
				self.direction = 'up';
				self.bounceCount++;
			}
		} else if (self.direction === 'left') {
			self.x += self.speed;
			// Check for bouncing against left edge
			if (self.isBouncing && self.x < 0 && self.bounceCount < self.maxBounces) {
				self.direction = 'right';
				self.bounceCount++;
			}
		} else if (self.direction === 'right') {
			self.x -= self.speed; // Note: speed is negative, so this is adding a positive value
			// Check for bouncing against right edge
			if (self.isBouncing && self.x > GAME_WIDTH && self.bounceCount < self.maxBounces) {
				self.direction = 'left';
				self.bounceCount++;
			}
		}
	};
	// Method to create explosion when player bullet is destroyed
	self.explode = function () {
		var explosion = new Explosion();
		explosion.x = self.x;
		explosion.y = self.y;
		// Make player bullet explosion slightly smaller
		explosion.scale.x = 0.6;
		explosion.scale.y = 0.6;
		game.addChild(explosion);
		explosions.push(explosion);
		// Play explosion sound
		LK.getSound('explosion').play();
	};
	return self;
});
var PlayerShip = Container.expand(function () {
	var self = Container.call(this);
	// Visual representation
	var shipGraphics = self.attachAsset('playerShip', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.2,
		scaleY: 1.2
	});
	// Health visual (initially invisible)
	var shieldGraphics = self.attachAsset('health', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0,
		scaleX: 1.2,
		scaleY: 1.2
	});
	// Final life warning text
	var finalLifeText = new Text2('FINAL LIFE', {
		size: 50,
		fill: 0xFF0000
	});
	finalLifeText.anchor.set(0.5, 0.5);
	finalLifeText.y = -110;
	finalLifeText.alpha = 0;
	self.addChild(finalLifeText);
	// Player properties
	self.speed = 10;
	self.fireRate = 20; // Ticks between shots
	self.lastShot = 0;
	self.health = 4; // Player starts with 4 health
	self.healthBar = new HealthBar();
	self.healthBar.y = -80; // Position above player
	self.healthBar.x = 0; // Perfectly center the healthbar with the ship
	self.addChild(self.healthBar);
	self.shieldActive = false;
	self.powerUpActive = false;
	self.quadBulletsActive = false;
	self.rotationSpeed = 0;
	self.finalLifeWarningActive = false;
	// Physics properties for smooth movement
	self.targetX = null;
	self.targetY = null;
	self.isMoving = false;
	self.moveTween = null;
	// Update method for rotation and missile text positioning
	self.update = function () {
		if (self.quadBulletsActive) {
			shipGraphics.rotation += self.rotationSpeed;
		}
		// Keep missile ready text below the ship
		if (missileReadyText && missileReadyText.visible) {
			missileReadyText.x = self.x;
			missileReadyText.y = self.y + 110;
		}
	};
	// Shield activation
	self.activateShield = function () {
		self.shieldActive = true;
		shieldGraphics.alpha = 0.5;
		// Shield times out after 5 seconds
		LK.setTimeout(function () {
			self.shieldActive = false;
			shieldGraphics.alpha = 0;
		}, 5000);
	};
	// Power-up activation
	self.activatePowerUp = function () {
		self.powerUpActive = true;
		shipGraphics.tint = 0xf1c40f; // Yellow tint for power-up
		self.fireRate = 10; // Faster firing
		// Power-up times out after 7 seconds
		LK.setTimeout(function () {
			self.powerUpActive = false;
			shipGraphics.tint = 0xFFFFFF;
			self.fireRate = 20;
		}, 7000);
	};
	// Quad bullets activation
	self.activateQuadBullets = function () {
		self.quadBulletsActive = true;
		shipGraphics.tint = 0xe74c3c; // Red tint for quad bullets
		self.fireRate = 15; // Medium firing speed
		self.rotationSpeed = 0.05; // Start spinning
		// Quad bullets time out after 8 seconds
		LK.setTimeout(function () {
			self.quadBulletsActive = false;
			shipGraphics.tint = 0xFFFFFF;
			self.fireRate = 20;
			self.rotationSpeed = 0;
			shipGraphics.rotation = 0; // Reset rotation
		}, 8000);
	};
	return self;
});
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	var powerUpGraphics = self.attachAsset('powerUp', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.5,
		scaleY: 1.5
	});
	self.speed = 3;
	// Add quad bullet type with 1/3 chance
	var rand = Math.random();
	if (rand < 0.33) {
		self.type = 'health';
	} else if (rand < 0.66) {
		self.type = 'weapon';
	} else {
		self.type = 'quadBullets';
	}
	// Set color based on type
	if (self.type === 'health') {
		powerUpGraphics.tint = 0x2ecc71; // Green for health
	} else if (self.type === 'weapon') {
		powerUpGraphics.tint = 0xf1c40f; // Yellow for weapon
	} else {
		powerUpGraphics.tint = 0xe74c3c; // Red for quad bullets
	}
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Game constants
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
var SPAWN_ENEMY_INTERVAL = 60; // Spawn enemy every 60 ticks initially
var SPAWN_POWERUP_INTERVAL = 600; // Spawn power-up every 600 ticks
var MIN_SPAWN_INTERVAL = 20; // Minimum spawn rate as difficulty increases
// Game state variables
var player;
var playerBullets = [];
var enemies = [];
var enemyBullets = [];
var powerUps = [];
var missiles = [];
var explosions = [];
var firePools = [];
var gameLevel = 1;
var spawnCounter = 0;
var powerUpCounter = 0;
var isGameActive = true;
var score = 0;
var lastMissileTime = 0;
var missileReadyText = new Text2('MISSILE READY', {
	size: 40,
	fill: 0xFF0000
});
// Initialize score display
var scoreTxt = new Text2('SCORE: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 30;
// Initialize level display
var levelTxt = new Text2('LEVEL: 1', {
	size: 60,
	fill: 0xFFFFFF
});
levelTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(levelTxt);
levelTxt.y = 100;
// Create player ship
function initializeGame() {
	player = new PlayerShip();
	player.x = GAME_WIDTH / 2;
	player.y = GAME_HEIGHT - 200;
	game.addChild(player);
	// Reset arrays
	playerBullets = [];
	enemies = [];
	enemyBullets = [];
	powerUps = [];
	missiles = [];
	explosions = [];
	firePools = [];
	// Reset game state
	gameLevel = 1;
	spawnCounter = 0;
	powerUpCounter = 0;
	isGameActive = true;
	lastMissileTime = 0;
	// Initialize missile ready text
	missileReadyText.anchor.set(0.5, 0.5);
	missileReadyText.alpha = 1;
	missileReadyText.visible = true;
	// Set initial missile time to be ready at game start
	lastMissileTime = LK.ticks - 600;
	// Position text below the player ship
	game.addChild(missileReadyText);
	// Flash the text immediately
	var _flashMissileText = function flashMissileText() {
		tween(missileReadyText, {
			alpha: 0
		}, {
			duration: 500,
			onFinish: function onFinish() {
				tween(missileReadyText, {
					alpha: 1
				}, {
					duration: 500,
					onFinish: _flashMissileText
				});
			}
		});
	};
	_flashMissileText();
	// Reset score and update display
	LK.setScore(0);
	score = 0;
	updateScoreDisplay();
	updateLevelDisplay();
	// Play background music
	LK.playMusic('gameMusic');
}
// Initialize the game
initializeGame();
// Update score display
function updateScoreDisplay() {
	scoreTxt.setText('SCORE: ' + score);
}
// Update level display
function updateLevelDisplay() {
	levelTxt.setText('LEVEL: ' + gameLevel);
}
// Player shooting
function playerShoot() {
	// Check fire rate cooldown
	if (LK.ticks - player.lastShot < player.fireRate) {
		return;
	}
	// Always fire dual cannons (left and right)
	var bulletLeft = new PlayerBullet();
	bulletLeft.x = player.x - 20;
	bulletLeft.y = player.y - 40;
	bulletLeft.direction = 'up';
	game.addChild(bulletLeft);
	playerBullets.push(bulletLeft);
	var bulletRight = new PlayerBullet();
	bulletRight.x = player.x + 20;
	bulletRight.y = player.y - 40;
	bulletRight.direction = 'up';
	game.addChild(bulletRight);
	playerBullets.push(bulletRight);
	// Triple bullets if weapon power-up is active
	if (player.powerUpActive) {
		var bulletCenter = new PlayerBullet();
		bulletCenter.x = player.x;
		bulletCenter.y = player.y - 50;
		bulletCenter.direction = 'up';
		game.addChild(bulletCenter);
		playerBullets.push(bulletCenter);
	}
	// Quad-directional bullets if quad bullets power-up is active
	if (player.quadBulletsActive) {
		// Up bullet already covered
		// Down bullet
		var bulletDown = new PlayerBullet();
		bulletDown.x = player.x;
		bulletDown.y = player.y + 40;
		bulletDown.direction = 'down';
		bulletDown.isPiercing = true;
		bulletDown.isBouncing = true;
		game.addChild(bulletDown);
		playerBullets.push(bulletDown);
		// Left bullet
		var bulletLeft = new PlayerBullet();
		bulletLeft.x = player.x - 40;
		bulletLeft.y = player.y;
		bulletLeft.direction = 'left';
		bulletLeft.isPiercing = true;
		bulletLeft.isBouncing = true;
		game.addChild(bulletLeft);
		playerBullets.push(bulletLeft);
		// Right bullet
		var bulletRight = new PlayerBullet();
		bulletRight.x = player.x + 40;
		bulletRight.y = player.y;
		bulletRight.direction = 'right';
		bulletRight.isPiercing = true;
		bulletRight.isBouncing = true;
		game.addChild(bulletRight);
		playerBullets.push(bulletRight);
	}
	// Play sound and reset shot timer
	LK.getSound('playerShoot').play();
	player.lastShot = LK.ticks;
}
// Enemy shooting
function enemyShoot(enemy) {
	if (LK.ticks - enemy.lastShot < enemy.fireRate) {
		return;
	}
	var bullet = new EnemyBullet();
	bullet.x = enemy.x;
	bullet.y = enemy.y + 40;
	game.addChild(bullet);
	enemyBullets.push(bullet);
	LK.getSound('enemyShoot').play();
	enemy.lastShot = LK.ticks;
}
// Spawn new enemy
function spawnEnemy() {
	var enemy = new Enemy();
	// Distribute enemies better across the screen width
	// Check if we have other enemies and avoid spawning too close to them
	if (enemies.length > 0) {
		// Find a position away from other enemies
		var attempts = 0;
		var potentialX;
		var validPosition = false;
		while (!validPosition && attempts < 10) {
			potentialX = Math.random() * (GAME_WIDTH - 100) + 50;
			validPosition = true;
			// Check distance from existing enemies
			for (var i = 0; i < enemies.length; i++) {
				if (Math.abs(enemies[i].x - potentialX) < 150) {
					validPosition = false;
					break;
				}
			}
			attempts++;
		}
		enemy.x = validPosition ? potentialX : Math.random() * (GAME_WIDTH - 100) + 50;
	} else {
		enemy.x = Math.random() * (GAME_WIDTH - 100) + 50;
	}
	enemy.y = -50;
	// Increase difficulty with levels
	if (gameLevel > 1) {
		enemy.speed = Math.min(2 + gameLevel * 0.5, 6);
		enemy.health = Math.min(1 + Math.floor(gameLevel / 3), 3);
	}
	if (gameLevel > 5) {
		enemy.fireRate = Math.max(120 - gameLevel * 5, 60);
	}
	game.addChild(enemy);
	enemies.push(enemy);
}
// Spawn power-up
function spawnPowerUp() {
	var powerUp = new PowerUp();
	powerUp.x = Math.random() * (GAME_WIDTH - 100) + 50;
	powerUp.y = -50;
	game.addChild(powerUp);
	powerUps.push(powerUp);
}
// Check level progress
function checkLevelProgress() {
	// Advance level based on score
	var shouldAdvanceLevel = Math.floor(score / 1000) + 1;
	if (shouldAdvanceLevel > gameLevel) {
		gameLevel = shouldAdvanceLevel;
		updateLevelDisplay();
		// Flash screen to indicate level up
		LK.effects.flashScreen(0x3498db, 500);
	}
}
// Handle collisions
function handleCollisions() {
	// Check player bullets hitting enemies
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		var bulletHit = false;
		// First check for player bullet hitting enemy bullets
		// Skip enemy bullet collision during quad bullets powerup to prevent lag
		if (!player.quadBulletsActive) {
			for (var j = enemyBullets.length - 1; j >= 0; j--) {
				if (bullet.intersects(enemyBullets[j])) {
					// Create explosion animation for the enemy bullet
					var explosion = new Explosion();
					explosion.x = enemyBullets[j].x;
					explosion.y = enemyBullets[j].y;
					explosion.scale.x = 0.5; // Smaller explosion for bullets
					explosion.scale.y = 0.5;
					game.addChild(explosion);
					explosions.push(explosion);
					// Remove enemy bullet
					enemyBullets[j].destroy();
					enemyBullets.splice(j, 1);
					// Increment hit counter for player bullet
					bullet.enemyBulletHits++;
					// Check if player bullet has reached its hit limit
					if (bullet.enemyBulletHits >= bullet.maxEnemyBulletHits) {
						// If hit limit reached, destroy the player bullet with explosion
						bullet.explode();
						bullet.destroy();
						playerBullets.splice(i, 1);
						// Create explosion animation at enemy position
						var explosion = new Explosion();
						explosion.x = enemy.x;
						explosion.y = enemy.y;
						game.addChild(explosion);
						explosions.push(explosion);
						// Remove enemy
						bulletHit = true;
						break;
					}
				}
			}
		}
		// If player bullet was destroyed by enemy bullets, skip enemy collision check
		if (bulletHit) {
			continue;
		}
		// Now check for player bullet hitting enemies
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				// Enemy takes damage
				if (enemy.takeDamage(bullet.power)) {
					// Enemy destroyed
					score += enemy.scoreValue;
					LK.setScore(score);
					updateScoreDisplay();
					LK.getSound('explosion').play();
					LK.effects.flashObject(enemy, 0xff0000, 300);
					// Create explosion animation at enemy position
					var explosion = new Explosion();
					explosion.x = enemy.x;
					explosion.y = enemy.y;
					game.addChild(explosion);
					explosions.push(explosion);
					// Remove enemy
					enemy.destroy();
					enemies.splice(j, 1);
				}
				// Only remove non-piercing bullets on hit
				if (!bullet.isPiercing) {
					bullet.explode(); // Add explosion effect when bullet is destroyed
					bullet.destroy();
					playerBullets.splice(i, 1);
					bulletHit = true;
					break;
				}
			}
		}
		// If a non-piercing bullet hit something, skip to the next bullet
		if (bulletHit) {
			continue;
		}
	}
	// Check enemy bullets hitting player
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var bullet = enemyBullets[i];
		if (bullet.intersects(player)) {
			// Player hit
			bullet.destroy();
			enemyBullets.splice(i, 1);
			if (player.shieldActive) {
				// Shield absorbs the hit
				player.shieldActive = false;
				var shield = player.getChildAt(1);
				shield.alpha = 0;
			} else {
				// Reduce player health
				player.health--;
				player.healthBar.updateHealth(player.health);
				// Flash player to indicate damage
				LK.effects.flashObject(player, 0xff0000, 300);
				// Check if player health reaches 1 (final life)
				if (player.health === 1 && !player.finalLifeWarningActive) {
					player.finalLifeWarningActive = true;
					// Hide health bar completely
					player.healthBar.visible = false;
					// Show and animate "Final Life" text
					var finalLifeText = player.getChildAt(2); // Get the final life text
					finalLifeText.alpha = 1;
					// Create flashing effect for the text
					var _flashTween2 = function flashTween() {
						tween(finalLifeText, {
							alpha: 0
						}, {
							duration: 500,
							onFinish: function onFinish() {
								tween(finalLifeText, {
									alpha: 1
								}, {
									duration: 500,
									onFinish: _flashTween2
								});
							}
						});
					};
					_flashTween2(); // Start the flashing animation
				}
				// Check if player is out of health
				if (player.health <= 0) {
					// Game over
					LK.effects.flashScreen(0xff0000, 1000);
					isGameActive = false;
					LK.showGameOver();
					break;
				}
			}
		}
	}
	// Check enemies colliding with player
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		if (enemy.intersects(player)) {
			if (player.shieldActive) {
				// Shield absorbs the hit
				enemy.destroy();
				enemies.splice(i, 1);
				// Shield gets depleted
				player.shieldActive = false;
				var shield = player.getChildAt(1);
				shield.alpha = 0;
				score += enemy.scoreValue;
				LK.setScore(score);
				updateScoreDisplay();
			} else {
				// Reduce player health by 2 (collision is more dangerous)
				player.health -= 2;
				player.healthBar.updateHealth(player.health);
				// Remove the enemy
				enemy.destroy();
				enemies.splice(i, 1);
				// Flash player to indicate damage
				LK.effects.flashObject(player, 0xff0000, 300);
				// Check if player health reaches 1 (final life)
				if (player.health === 1 && !player.finalLifeWarningActive) {
					player.finalLifeWarningActive = true;
					// Hide health bar completely
					player.healthBar.visible = false;
					// Show and animate "Final Life" text
					var finalLifeText = player.getChildAt(2); // Get the final life text
					finalLifeText.alpha = 1;
					// Create flashing effect for the text
					var _flashTween2 = function _flashTween() {
						tween(finalLifeText, {
							alpha: 0
						}, {
							duration: 500,
							onFinish: function onFinish() {
								tween(finalLifeText, {
									alpha: 1
								}, {
									duration: 500,
									onFinish: _flashTween2
								});
							}
						});
					};
					_flashTween2(); // Start the flashing animation
				}
				// Check if player is out of health
				if (player.health <= 0) {
					// Game over
					LK.effects.flashScreen(0xff0000, 1000);
					isGameActive = false;
					LK.showGameOver();
					break;
				}
			}
		}
	}
	// Check player collecting power-ups
	for (var i = powerUps.length - 1; i >= 0; i--) {
		var powerUp = powerUps[i];
		if (powerUp.intersects(player)) {
			LK.getSound('powerUp').play();
			// Apply power-up effect
			if (powerUp.type === 'health') {
				// Health regeneration logic
				if (player.health < player.healthBar.maxHealth) {
					// Add 1 health point
					player.health = Math.min(player.health + 1, player.healthBar.maxHealth);
					// If player was at final life, restore health bar and remove warning
					if (player.finalLifeWarningActive && player.health > 1) {
						player.finalLifeWarningActive = false;
						player.healthBar.visible = true;
						// Get the final life text and hide it
						var finalLifeText = player.getChildAt(2);
						// Stop any existing tweens on the final life text
						tween.stopTweens(finalLifeText);
						finalLifeText.alpha = 0;
					}
					// Update health bar
					player.healthBar.updateHealth(player.health);
				}
			} else if (powerUp.type === 'weapon') {
				player.activatePowerUp();
			} else if (powerUp.type === 'quadBullets') {
				player.activateQuadBullets();
			}
			// Remove power-up
			powerUp.destroy();
			powerUps.splice(i, 1);
		}
	}
}
// Clean up off-screen objects
function cleanupOffscreenObjects() {
	// Clean up missiles that went off screen
	for (var i = missiles.length - 1; i >= 0; i--) {
		var missile = missiles[i];
		if (missile.y < -50 || missile.y > GAME_HEIGHT + 50 || missile.x < -50 || missile.x > GAME_WIDTH + 50) {
			missile.explode();
			missile.destroy();
			missiles.splice(i, 1);
		}
	}
	// Clean up bullets that went off screen
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		// Check if bullet is off screen based on direction (unless it's bouncing)
		if (!bullet.isBouncing) {
			if (bullet.direction === 'up' && bullet.y < -50 || bullet.direction === 'down' && bullet.y > GAME_HEIGHT + 50 || bullet.direction === 'left' && bullet.x < -50 || bullet.direction === 'right' && bullet.x > GAME_WIDTH + 50) {
				bullet.destroy();
				playerBullets.splice(i, 1);
			}
		} else if (bullet.bounceCount >= bullet.maxBounces) {
			// Add explosion for bouncing bullets that reached max bounce count
			bullet.explode();
			bullet.destroy();
			playerBullets.splice(i, 1);
		}
	}
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		if (enemyBullets[i].y > GAME_HEIGHT + 50) {
			enemyBullets[i].destroy();
			enemyBullets.splice(i, 1);
		}
	}
	// Clean up enemies that went off screen
	for (var i = enemies.length - 1; i >= 0; i--) {
		if (enemies[i].y > GAME_HEIGHT + 100) {
			enemies[i].destroy();
			enemies.splice(i, 1);
		}
	}
	// Clean up power-ups that went off screen
	for (var i = powerUps.length - 1; i >= 0; i--) {
		if (powerUps[i].y > GAME_HEIGHT + 50) {
			powerUps[i].destroy();
			powerUps.splice(i, 1);
		}
	}
}
// Player movement
var isDragging = false;
game.down = function (x, y) {
	// Fire missile on left click if cooldown is ready
	if (LK.ticks - lastMissileTime >= 600) {
		// 10 seconds at 60fps
		// Find closest enemy as target first
		var closestEnemy = null;
		var closestDistance = Number.MAX_VALUE;
		var potentialTargets = [];
		// Find up to 6 potential targets
		for (var i = 0; i < enemies.length; i++) {
			var enemy = enemies[i];
			var dx = enemy.x - player.x;
			var dy = enemy.y - player.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance < closestDistance) {
				closestDistance = distance;
				closestEnemy = enemy;
			}
			// Add to potential targets list (sort by proximity later)
			potentialTargets.push({
				enemy: enemy,
				distance: distance
			});
		}
		// Sort targets by distance
		potentialTargets.sort(function (a, b) {
			return a.distance - b.distance;
		});
		// Launch three missiles from the same vertical position but different horizontal positions
		// Center missile - positioned exactly in the center of player ship
		var centerMissile = new Missile();
		centerMissile.x = player.x; // Center horizontally with player
		centerMissile.y = player.y - 60; // Launch from front center of player ship
		centerMissile.turnSpeed = 0.05; // Very slight homing for center missile
		centerMissile.initialDirection = 'up'; // Make sure it exits straight up first
		// Left missile - positioned to the left of center missile
		var leftMissile = new Missile();
		leftMissile.x = player.x - 30; // Position left of the player
		leftMissile.y = player.y - 60; // Same vertical position as center missile
		leftMissile.angle = -0.3; // Slight left angle for initial trajectory
		leftMissile.turnSpeed = 0.07; // Reduced homing for more separation
		leftMissile.initialDirection = 'left-up'; // Make sure it exits left-up first
		// Right missile - positioned to the right of center missile
		var rightMissile = new Missile();
		rightMissile.x = player.x + 30; // Position right of the player
		rightMissile.y = player.y - 60; // Same vertical position as center missile
		rightMissile.angle = 0.3; // Slight right angle for initial trajectory
		rightMissile.turnSpeed = 0.07; // Reduced homing for more separation
		rightMissile.initialDirection = 'right-up'; // Make sure it exits right-up first
		// If we found a target, set it for missiles with different offsets to avoid pairing
		if (closestEnemy) {
			// Set slightly different targets for each missile to avoid pairing
			centerMissile.targetX = closestEnemy.x;
			centerMissile.targetY = closestEnemy.y;
			// For side missiles, either use different enemies or offset from main target
			if (potentialTargets.length > 1) {
				leftMissile.targetX = potentialTargets[Math.min(1, potentialTargets.length - 1)].enemy.x - 50;
				leftMissile.targetY = potentialTargets[Math.min(1, potentialTargets.length - 1)].enemy.y;
			} else {
				// If not enough targets, offset significantly from main target
				leftMissile.targetX = closestEnemy.x - 150;
				leftMissile.targetY = closestEnemy.y;
			}
			if (potentialTargets.length > 2) {
				rightMissile.targetX = potentialTargets[Math.min(2, potentialTargets.length - 1)].enemy.x + 50;
				rightMissile.targetY = potentialTargets[Math.min(2, potentialTargets.length - 1)].enemy.y;
			} else {
				// If not enough targets, offset significantly from main target
				rightMissile.targetX = closestEnemy.x + 150;
				rightMissile.targetY = closestEnemy.y;
			}
		}
		// Add first wave of missiles to game
		game.addChild(centerMissile);
		missiles.push(centerMissile);
		game.addChild(leftMissile);
		missiles.push(leftMissile);
		game.addChild(rightMissile);
		missiles.push(rightMissile);
		// Create a second wave of missiles with slightly different launch positions
		// Second center missile
		var centerMissile2 = new Missile();
		centerMissile2.x = player.x;
		centerMissile2.y = player.y - 30; // Slightly higher than first wave
		centerMissile2.turnSpeed = 0.06;
		centerMissile2.initialDirection = 'up';
		// Second left missile
		var leftMissile2 = new Missile();
		leftMissile2.x = player.x - 40; // Different horizontal offset
		leftMissile2.y = player.y - 30;
		leftMissile2.angle = -0.4; // Different initial angle
		leftMissile2.turnSpeed = 0.08;
		leftMissile2.initialDirection = 'left-up';
		// Second right missile
		var rightMissile2 = new Missile();
		rightMissile2.x = player.x + 40; // Different horizontal offset
		rightMissile2.y = player.y - 30;
		rightMissile2.angle = 0.4; // Different initial angle
		rightMissile2.turnSpeed = 0.08;
		rightMissile2.initialDirection = 'right-up';
		// Set targets for second wave
		if (closestEnemy) {
			// Set slightly different targets for second wave missiles
			if (potentialTargets.length > 3) {
				centerMissile2.targetX = potentialTargets[3].enemy.x;
				centerMissile2.targetY = potentialTargets[3].enemy.y;
			} else {
				centerMissile2.targetX = closestEnemy.x + 50;
				centerMissile2.targetY = closestEnemy.y + 50;
			}
			if (potentialTargets.length > 4) {
				leftMissile2.targetX = potentialTargets[4].enemy.x - 70;
				leftMissile2.targetY = potentialTargets[4].enemy.y;
			} else {
				leftMissile2.targetX = closestEnemy.x - 200;
				leftMissile2.targetY = closestEnemy.y + 50;
			}
			if (potentialTargets.length > 5) {
				rightMissile2.targetX = potentialTargets[5].enemy.x + 70;
				rightMissile2.targetY = potentialTargets[5].enemy.y;
			} else {
				rightMissile2.targetX = closestEnemy.x + 200;
				rightMissile2.targetY = closestEnemy.y + 50;
			}
		}
		// Add second wave of missiles to game
		game.addChild(centerMissile2);
		missiles.push(centerMissile2);
		game.addChild(leftMissile2);
		missiles.push(leftMissile2);
		game.addChild(rightMissile2);
		missiles.push(rightMissile2);
		// Play missile launch sound
		LK.getSound('missileLaunch').play();
		// Reset cooldown
		lastMissileTime = LK.ticks;
		// Hide missile ready text and stop any active tweens
		tween.stop(missileReadyText);
		missileReadyText.visible = false;
	}
	// Handle regular player movement
	var targetX = x;
	var targetY = y;
	// Clamp target position to game bounds
	if (targetX < 50) {
		targetX = 50;
	}
	if (targetX > GAME_WIDTH - 50) {
		targetX = GAME_WIDTH - 50;
	}
	if (targetY < 50) {
		targetY = 50;
	}
	if (targetY > GAME_HEIGHT - 50) {
		targetY = GAME_HEIGHT - 50;
	}
	player.targetX = targetX;
	player.targetY = targetY;
	player.isMoving = true;
	// Also shoot when player taps
	playerShoot();
};
game.move = function (x, y) {
	if (isGameActive) {
		// Clamp target position to game bounds
		var targetX = x;
		var targetY = y;
		if (targetX < 50) {
			targetX = 50;
		}
		if (targetX > GAME_WIDTH - 50) {
			targetX = GAME_WIDTH - 50;
		}
		if (targetY < 50) {
			targetY = 50;
		}
		if (targetY > GAME_HEIGHT - 50) {
			targetY = GAME_HEIGHT - 50;
		}
		// Update target position
		player.targetX = targetX;
		player.targetY = targetY;
		// For better tracking during fast mouse movements, directly update position
		player.x = player.targetX;
		player.y = player.targetY;
		player.isMoving = true; //{2K}{2L}{2M}{2N}
	}
};
game.up = function () {
	// Keep the ship moving toward last target point
};
// Main game update loop
game.update = function () {
	if (!isGameActive) {
		return;
	}
	// Update missile ready text
	if (LK.ticks - lastMissileTime >= 600) {
		// 10 seconds cooldown
		if (!missileReadyText.visible) {
			missileReadyText.visible = true;
			missileReadyText.x = player.x;
			missileReadyText.y = player.y + 110;
			missileReadyText.alpha = 1;
			// Flash the text when ready
			var _flashMissileText2 = function flashMissileText() {
				tween(missileReadyText, {
					alpha: 0
				}, {
					duration: 500,
					onFinish: function onFinish() {
						tween(missileReadyText, {
							alpha: 1
						}, {
							duration: 500,
							onFinish: _flashMissileText2
						});
					}
				});
			};
			_flashMissileText2();
		}
	}
	// Spawn enemies
	spawnCounter++;
	var currentSpawnRate = Math.max(SPAWN_ENEMY_INTERVAL - gameLevel * 5, MIN_SPAWN_INTERVAL);
	if (spawnCounter >= currentSpawnRate) {
		spawnEnemy();
		spawnCounter = 0;
	}
	// Spawn power-ups
	powerUpCounter++;
	if (powerUpCounter >= SPAWN_POWERUP_INTERVAL) {
		spawnPowerUp();
		powerUpCounter = 0;
	}
	// Make player shoot automatically
	if (player.isMoving) {
		playerShoot();
	}
	// Update enemy shooting
	for (var i = 0; i < enemies.length; i++) {
		enemyShoot(enemies[i]);
	}
	// Update missiles
	for (var i = missiles.length - 1; i >= 0; i--) {
		var missile = missiles[i];
		// If missile doesn't have a target or target is destroyed, find new target
		if ((missile.targetX === null || missile.targetY === null) && enemies.length > 0) {
			// Find closest enemy as new target
			var closestEnemy = null;
			var closestDistance = Number.MAX_VALUE;
			// Check all enemies for potential targets
			for (var k = 0; k < enemies.length; k++) {
				var dx = enemies[k].x - missile.x;
				var dy = enemies[k].y - missile.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance < closestDistance) {
					closestDistance = distance;
					closestEnemy = enemies[k];
				}
			}
			// If we found a target, set it with slight offset based on missile type
			if (closestEnemy) {
				// Add slightly different offsets to each missile's target to maintain separation
				// We can determine missile "type" by its position relative to player
				var offsetX = 0;
				var offsetY = 0; // Adding vertical offset for better separation
				// Using angle to identify missile type
				if (missile.angle < 0) {
					// Left missile
					offsetX = -100; // Increased horizontal offset
					offsetY = -20; // Slight vertical offset
				} else if (missile.angle > 0) {
					// Right missile
					offsetX = 100; // Increased horizontal offset
					offsetY = -20; // Slight vertical offset
				} else {
					// Center missile
					offsetY = -50; // Different vertical offset for center missile
				}
				missile.targetX = closestEnemy.x + offsetX;
				missile.targetY = closestEnemy.y + offsetY;
			}
		}
		// Check if missile hits an enemy
		var missileHit = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			if (missile.intersects(enemies[j])) {
				missile.explode();
				missile.destroy();
				missiles.splice(i, 1);
				missileHit = true;
				break;
			}
		}
		// Check if missile is off screen
		if (!missileHit && (missile.y < -50 || missile.y > GAME_HEIGHT + 50 || missile.x < -50 || missile.x > GAME_WIDTH + 50)) {
			missile.explode();
			missile.destroy();
			missiles.splice(i, 1);
		}
	}
	// Update explosions
	for (var i = explosions.length - 1; i >= 0; i--) {
		if (explosions[i].update()) {
			explosions.splice(i, 1);
		}
	}
	// Update fire pools
	for (var i = firePools.length - 1; i >= 0; i--) {
		if (firePools[i].update()) {
			firePools.splice(i, 1);
		}
	}
	// Check collisions
	handleCollisions();
	// Clean up off-screen objects
	cleanupOffscreenObjects();
	// Check level progression
	checkLevelProgress();
	// Win condition check
	if (score >= 10000) {
		LK.showYouWin();
		isGameActive = false;
	}
};