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

/**** 
* Classes
****/ 
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 20;
	self.damage = 10;
	self.vx = 0;
	self.vy = 0;
	self.piercing = false;
	self.maxDistance = 800;
	self.travelDistance = 0;
	self.update = function () {
		var moveX = self.vx;
		var moveY = self.vy;
		var distance = Math.sqrt(moveX * moveX + moveY * moveY);
		self.travelDistance += distance;
		self.x += moveX;
		self.y += moveY;
	};
	return self;
});
var HealthPack = Container.expand(function () {
	var self = Container.call(this);
	var healthGraphics = self.attachAsset('healthPack', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	healthGraphics.tint = 0xFF0000; // Bright red color
	// Add + text on the healthpack with white color
	var plusText = new Text2('+', {
		size: 48,
		fill: 0xFFFFFF,
		font: "'Arial Black'"
	});
	plusText.anchor.set(0.5, 0.5);
	self.addChild(plusText);
	self.healAmount = 25; // Will be calculated as percentage in Player.heal method
	self.spawnTime = LK.ticks;
	self.update = function () {
		// Pulsing effect using tween every 1 second
		if (LK.ticks % 60 === 0) {
			// Pulse every 1 second from 100% down to 70%
			tween(self, {
				scaleX: 0.7,
				scaleY: 0.7
			}, {
				duration: 300,
				easing: tween.easeInOut,
				onFinish: function onFinish() {
					tween(self, {
						scaleX: 1.0,
						scaleY: 1.0
					}, {
						duration: 300,
						easing: tween.easeInOut
					});
				}
			});
		}
		// Keep + text readable during scaling
		plusText.scaleX = 1 / Math.max(self.scaleX, 0.7);
		plusText.scaleY = 1 / Math.max(self.scaleY, 0.7);
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 100;
	self.maxHealth = 100;
	self.fireRate = 10;
	self.fireCooldown = 0;
	self.moveSpeed = 5;
	self.takeDamage = function (amount) {
		self.health -= amount;
		LK.getSound('playerHurt').play();
		LK.effects.flashObject(self, 0xFF0000, 500);
		if (self.health <= 0) {
			self.health = 0;
			return true;
		}
		return false;
	};
	self.heal = function (amount) {
		// Calculate 25% of max health for health pack healing
		var healAmount = Math.floor(self.maxHealth * 0.25);
		self.health = Math.min(self.health + healAmount, self.maxHealth);
	};
	self.update = function () {
		if (self.fireCooldown > 0) self.fireCooldown--;
		// Ensure player is always fully visible
		self.alpha = 1;
	};
	return self;
});
var PowerShotPowerUp = Container.expand(function () {
	var self = Container.call(this);
	var powerUpGraphics = self.attachAsset('powerShot', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add P text on the powerup with white color
	var pText = new Text2('P', {
		size: 48,
		fill: 0xFFFFFF,
		font: "'Arial Black'"
	});
	pText.anchor.set(0.5, 0.5);
	self.addChild(pText);
	self.ammoAmount = 10;
	self.spawnTime = LK.ticks;
	self.update = function () {
		// Large pulsing effect using tween every 1 second
		if (LK.ticks % 60 === 0) {
			// Pulse every 1 second from 100% down to 10%
			tween(self, {
				scaleX: 0.1,
				scaleY: 0.1
			}, {
				duration: 300,
				easing: tween.easeInOut,
				onFinish: function onFinish() {
					tween(self, {
						scaleX: 0.5,
						scaleY: 0.5
					}, {
						duration: 300,
						easing: tween.easeInOut
					});
				}
			});
		}
		// Keep P text readable during scaling
		pText.scaleX = 1 / Math.max(self.scaleX, 0.1);
		pText.scaleY = 1 / Math.max(self.scaleY, 0.1);
	};
	return self;
});
var SniperBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('sniperBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10; // Set sniper bullet speed to 10
	self.damage = 100; // 10x damage (10 * 10)
	self.vx = 0;
	self.vy = 0;
	self.piercing = true; // Sniper bullets pierce through zombies
	self.maxDistance = 1600; // 2x range (800 * 2)
	self.travelDistance = 0;
	self.update = function () {
		var moveX = self.vx;
		var moveY = self.vy;
		var distance = Math.sqrt(moveX * moveX + moveY * moveY);
		self.travelDistance += distance;
		self.x += moveX;
		self.y += moveY;
		// Add spinning animation - 25% faster
		self.rotation += 0.375;
		// Add pulsing animation from 25% to 100% size
		var pulseScale = 0.25 + 0.75 * (Math.sin(LK.ticks * 0.2) * 0.5 + 0.5);
		self.scaleX = pulseScale;
		self.scaleY = pulseScale;
	};
	return self;
});
var SniperPowerUp = Container.expand(function () {
	var self = Container.call(this);
	var powerUpGraphics = self.attachAsset('powerShot', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	powerUpGraphics.tint = 0xFF0000; // Red tint for sniper
	// Add S text on the powerup with white color
	var sText = new Text2('S', {
		size: 48,
		fill: 0xFFFFFF,
		font: "'Arial Black'"
	});
	sText.anchor.set(0.5, 0.5);
	self.addChild(sText);
	self.spawnTime = LK.ticks;
	self.update = function () {
		// Large pulsing effect using tween every 1 second
		if (LK.ticks % 60 === 0) {
			// Pulse every 1 second from 100% down to 10%
			tween(self, {
				scaleX: 0.1,
				scaleY: 0.1
			}, {
				duration: 300,
				easing: tween.easeInOut,
				onFinish: function onFinish() {
					tween(self, {
						scaleX: 0.5,
						scaleY: 0.5
					}, {
						duration: 300,
						easing: tween.easeInOut
					});
				}
			});
		}
		// Keep S text readable during scaling
		sText.scaleX = 1 / Math.max(self.scaleX, 0.1);
		sText.scaleY = 1 / Math.max(self.scaleY, 0.1);
	};
	return self;
});
var TripleShot = Container.expand(function () {
	var self = Container.call(this);
	// Create center bullet
	var centerBullet = self.attachAsset('tripleShotBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	centerBullet.x = 0;
	centerBullet.y = 0;
	centerBullet.rotation = 0;
	// Create left bullet tilted 10 degrees away
	var leftBullet = self.attachAsset('tripleShotBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	leftBullet.x = -20;
	leftBullet.y = -8;
	leftBullet.rotation = -10 * Math.PI / 180; // -10 degrees in radians
	// Create right bullet tilted 10 degrees away
	var rightBullet = self.attachAsset('tripleShotBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	rightBullet.x = 20;
	rightBullet.y = -8;
	rightBullet.rotation = 10 * Math.PI / 180; // 10 degrees in radians
	self.spawnTime = LK.ticks;
	self.update = function () {
		// Spinning animation like Zoin - rotate the entire powerup
		self.rotation += 0.075;
		// Add pulsing effect with tween every 2 seconds
		if (LK.ticks % 120 === 0) {
			// Pulse every 2 seconds
			tween(self, {
				scaleX: 1.3,
				scaleY: 1.3
			}, {
				duration: 300,
				easing: tween.easeInOut,
				onFinish: function onFinish() {
					tween(self, {
						scaleX: 1.0,
						scaleY: 1.0
					}, {
						duration: 300,
						easing: tween.easeInOut
					});
				}
			});
		}
		// Add floating effect
		self.y += Math.sin(LK.ticks * 0.1) * 0.3;
	};
	return self;
});
var Zoin = Container.expand(function () {
	var self = Container.call(this);
	var zoinGraphics = self.attachAsset('zoin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add Z text on the coin with neon green color
	var zText = new Text2('Z', {
		size: 24,
		fill: 0x00ff00,
		font: "'Arial Black'"
	});
	zText.anchor.set(0.5, 0.5);
	self.addChild(zText);
	self.spawnTime = LK.ticks;
	self.spinPhase = 0; // Track spinning phase for coin flip effect
	self.update = function () {
		// Spinning animation - slower spin to show coin flip effect at 50% speed
		self.spinPhase += 0.075;
		// Scale X based on sine wave to create flipping effect
		var scaleX = Math.abs(Math.sin(self.spinPhase));
		self.scaleX = scaleX;
		zText.scaleX = 1 / Math.max(scaleX, 0.1); // Keep Z readable and prevent division by 0
		// Z is always visible on both sides - no longer hide it
		zText.visible = true;
		// Pulsing effect using tween
		if (LK.ticks % 120 === 0) {
			// Pulse every 2 seconds
			tween(self, {
				scaleY: 1.3
			}, {
				duration: 300,
				easing: tween.easeInOut,
				onFinish: function onFinish() {
					tween(self, {
						scaleY: 1.0
					}, {
						duration: 300,
						easing: tween.easeInOut
					});
				}
			});
		}
		// Add floating effect
		self.y += Math.sin(LK.ticks * 0.1) * 0.3;
	};
	return self;
});
var Zombie = Container.expand(function () {
	var self = Container.call(this);
	// Randomly choose zombie visual from available assets
	var zombieAssets = ['zombie', 'zombie2', 'zombie3', 'zombie4'];
	var randomAsset = zombieAssets[Math.floor(Math.random() * zombieAssets.length)];
	var zombieGraphics = self.attachAsset(randomAsset, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.baseSpeed = 1.5;
	var variation = self.baseSpeed * 0.25; // 25% variation
	self.speed = Math.round(self.baseSpeed + (Math.random() - 0.5) * 2 * variation); // Random between baseSpeed ± 25%
	self.health = 20;
	self.maxHealth = 20; // Store base health for wave scaling
	self.damage = 1;
	self.baseDamage = 1; // Store base damage for wave scaling
	self.attackCooldown = 0;
	self.isDead = false;
	self.takeDamage = function (amount) {
		if (self.isDead) return false;
		self.health -= amount;
		if (self.health <= 0) {
			self.isDead = true;
			LK.getSound('zombieHit').play();
			return true;
		}
		zombieGraphics.tint = 0xFF0000;
		tween(zombieGraphics, {
			tint: 0xFFFFFF
		}, {
			duration: 200,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				zombieGraphics.tint = 0xFFFFFF;
			}
		});
		return false;
	};
	self.update = function () {
		if (self.isDead) return;
		if (self.attackCooldown > 0) self.attackCooldown--;
	};
	return self;
});
var ZombieHulk = Zombie.expand(function () {
	var self = Zombie.call(this);
	// Enhanced stats: 100% more life, 25% more speed, 50% larger
	self.baseSpeed = 1.5 * 1.25; // 25% more speed
	var variation = self.baseSpeed * 0.25; // 25% variation
	self.speed = Math.round(self.baseSpeed + (Math.random() - 0.5) * 2 * variation); // Random between baseSpeed ± 25%
	self.health = 40; // 100% more life (20 * 2)
	self.maxHealth = 40; // Store base health for wave scaling
	// Make 50% larger by scaling the existing zombie graphics after brief delay to ensure visual is ready
	LK.setTimeout(function () {
		tween(self, {
			scaleX: 1.5,
			scaleY: 1.5
		}, {
			duration: 300,
			easing: tween.easeOut
		});
	}, 50);
	// 50% chance to have a random powerup in inventory
	self.hasPowerup = Math.random() < 0.5;
	if (self.hasPowerup) {
		var powerUpTypes = ['powerShotPowerUp', 'healthPack', 'tripleShot'];
		self.powerupType = powerUpTypes[Math.floor(Math.random() * powerUpTypes.length)];
	}
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a1a
});

/**** 
* Game Code
****/ 
var player;
var zombies = [];
var bullets = [];
var pickups = [];
var wave = 1;
var zombiesPerWave = 5;
var zombiesSpawned = 0;
var zombiesKilled = 0;
var spawnTimer = 0;
var scoreMultiplier = 1;
var killStreak = 0;
var powerAmmo = 0;
var lastPowerUpSpawn = 0;
var killsSinceLastPowerUp = 0;
var powerUpList = ['powerShotPowerUp', 'healthPack', 'tripleShot', 'sniperPowerUp'];
var lastPowerUpType = null;
var usedPowerUps = []; // Track which powerups have been used in current cycle
var availablePowerUps = powerUpList.slice(); // Copy of powerups available for selection
var hasTripleShot = false;
var tripleShotLevel = 0;
var maxTripleShotLevel = 5;
var hasSniperPowerUp = false;
var sniperLevel = 0;
var sniperCooldown = 0;
var sniperFireRate = 300; // 5 seconds at 60fps
var noZombiesTimer = 0;
var noZombiesThreshold = 600; // 10 seconds at 60fps
// Load persistent data from storage (removed reset statements)
// Load persistent data from storage without clearing
var zoins = storage.zoins || 0;
// Upgrade costs and levels - loaded from storage
var maxHealthUpgrades = storage.maxHealthUpgrades || 0;
var fireRateUpgrades = storage.fireRateUpgrades || 0;
var damageUpgrades = storage.damageUpgrades || 0;
// Save damage upgrades to storage whenever modified
storage.damageUpgrades = damageUpgrades;
// Load leaderboard data from storage
// Leaderboard data - reconstruct from flattened storage
var storedLeaderboard = storage.leaderboard || {};
var leaderboard = [];
if (storedLeaderboard.length) {
	for (var i = 0; i < storedLeaderboard.length; i++) {
		if (storedLeaderboard['name_' + i] !== undefined) {
			leaderboard.push({
				name: String(storedLeaderboard['name_' + i]),
				score: Number(storedLeaderboard['score_' + i]),
				wave: Number(storedLeaderboard['wave_' + i])
			});
		}
	}
} else {
	leaderboard = [];
}
// Arrays for generating player names
var adjectives = ['Brave', 'Swift', 'Mighty', 'Fierce', 'Bold', 'Quick', 'Strong', 'Wild', 'Sharp', 'Dark', 'Bright', 'Cold', 'Hot', 'Fast', 'Slow', 'Big', 'Small', 'Red', 'Blue', 'Green'];
var commonNames = ['Alex', 'Sam', 'Max', 'Jake', 'Mike', 'Tom', 'Ben', 'Dan', 'Joe', 'Ryan', 'Kyle', 'Luke', 'Dave', 'Jack', 'Matt', 'Nick', 'Chris', 'Josh', 'Mark', 'Paul', 'Emma', 'Sarah', 'Lisa', 'Amy', 'Kate', 'Anna', 'Maya', 'Zoe', 'Mia', 'Ella', 'Eva', 'Ava', 'Lily', 'Ruby', 'Nina', 'Rose', 'Lucy', 'Jade', 'Hope', 'Iris'];
// Load or generate player name
var currentPlayerName = storage.playerName || '';
if (!currentPlayerName) {
	var randomAdjective = adjectives[Math.floor(Math.random() * adjectives.length)];
	var randomName = commonNames[Math.floor(Math.random() * commonNames.length)];
	currentPlayerName = randomAdjective + '-' + randomName;
	storage.playerName = currentPlayerName;
}
var moveControl;
var moveStick;
var isDraggingMove = false;
// UI Elements
var waveText = new Text2('Wave: 1', {
	size: 80,
	fill: 0xFFFFFF
});
waveText.anchor.set(0, 0);
waveText.x = 150;
LK.gui.topLeft.addChild(waveText);
var scoreText = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreText.anchor.set(1, 0);
scoreText.x = -150;
LK.gui.topRight.addChild(scoreText);
// Load hi-score from storage or default to 0
var hiScore = storage.hiScore || 0;
var hiScoreText = new Text2('Hi-Score: ' + hiScore, {
	size: 60,
	fill: 0xFFD700
});
hiScoreText.anchor.set(1, 0);
hiScoreText.x = -150;
hiScoreText.y = 70; // Position below score display
LK.gui.topRight.addChild(hiScoreText);
// Health bar black outline
var healthBarOutline = LK.getAsset('ammoBox', {
	width: 1849,
	height: 81,
	anchorX: 0.5,
	anchorY: 0
});
healthBarOutline.tint = 0x000000;
healthBarOutline.x = 1024;
healthBarOutline.y = 97;
game.addChildAt(healthBarOutline, 0);
// Health bar background using lifebar asset
var healthBarBg = LK.getAsset('lifebar', {
	width: 2048,
	height: 225,
	anchorX: 0.5,
	anchorY: 0.5
});
healthBarBg.x = 1024;
healthBarBg.y = 166.25;
game.addChildAt(healthBarBg, 1);
// Health bar fill
var healthBarFill = LK.getAsset('ammoBox', {
	width: 1382.25,
	// Reduced by 25% (1843 * 0.75)
	height: 58.59375,
	// 25% taller (46.875 * 1.25)
	anchorX: 0.5,
	anchorY: 0
});
healthBarFill.tint = 0x000000;
healthBarFill.x = 1024;
healthBarFill.y = 113.75; // Moved up 5px (118.75 - 5)
game.addChildAt(healthBarFill, 2);
// Health text display
var healthText = new Text2('100/100', {
	size: 56,
	fill: 0xFFFFFF
});
healthText.anchor.set(0.5, 0.5);
healthText.x = 1024;
healthText.y = 137.5; // Center of health bar (100 + 75/2)
game.addChildAt(healthText, 3);
var powerAmmoText = new Text2('Power Ammo: 0', {
	size: 45,
	fill: 0xFFD700
});
powerAmmoText.anchor.set(1, 1);
powerAmmoText.x = -20;
powerAmmoText.y = -80;
LK.gui.bottomRight.addChild(powerAmmoText);
var zoinText = new Text2('Zoins: ' + zoins, {
	size: 45,
	fill: 0xFFD700
});
zoinText.anchor.set(1, 1);
zoinText.x = -20;
zoinText.y = -140;
LK.gui.bottomRight.addChild(zoinText);
// Leaderboard display as scrolling banner
var leaderboardText = new Text2('LEADERBOARD\n', {
	size: 40,
	fill: 0xFFFFFF
});
leaderboardText.anchor.set(0, 0);
leaderboardText.x = 2048; // Start off-screen to the right
leaderboardText.y = 200;
game.addChild(leaderboardText);
// Leaderboard scrolling variables
var leaderboardScrolling = false;
// Update leaderboard display
function updateLeaderboardDisplay() {
	var displayText = 'LEADERBOARD  ';
	var sortedLeaderboard = leaderboard.slice().sort(function (a, b) {
		return b.score - a.score;
	});
	// Show top 20 entries
	for (var i = 0; i < Math.min(20, sortedLeaderboard.length); i++) {
		var entry = sortedLeaderboard[i];
		displayText += i + 1 + '. ' + entry.name + ' - ' + entry.score + ' (Wave ' + entry.wave + ')  •  ';
	}
	// Find current player's best entry and position
	var playerBestEntry = null;
	var playerPosition = -1;
	for (var i = 0; i < sortedLeaderboard.length; i++) {
		var entry = sortedLeaderboard[i];
		if (entry.name === currentPlayerName && (!playerBestEntry || entry.score > playerBestEntry.score)) {
			playerBestEntry = entry;
			playerPosition = i + 1;
		}
	}
	// If player has an entry and it's not in top 20, show their position
	if (playerBestEntry && playerPosition > 20) {
		displayText += '... ' + playerPosition + '. ' + playerBestEntry.name + ' - ' + playerBestEntry.score + ' (Wave ' + playerBestEntry.wave + ')  •  ';
	}
	leaderboardText.setText(displayText);
	startLeaderboardScroll();
}
// Start leaderboard scrolling animation
function startLeaderboardScroll() {
	if (leaderboardScrolling) return;
	leaderboardScrolling = true;
	// Stop any existing tween
	tween.stop(leaderboardText, {
		x: true
	});
	// Reset position to start from right
	leaderboardText.x = 2048;
	// Calculate scroll distance based on text width
	var scrollDistance = leaderboardText.width + 2048;
	// Start scrolling animation
	tween(leaderboardText, {
		x: -scrollDistance
	}, {
		duration: scrollDistance * 10,
		// 50% faster scrolling (15 -> 10)
		easing: tween.linear,
		onFinish: function onFinish() {
			leaderboardScrolling = false;
			// Restart the scroll immediately for continuous display
			startLeaderboardScroll();
		}
	});
}
updateLeaderboardDisplay();
// Function to submit score to leaderboard
function submitScoreToLeaderboard() {
	// Player name is now persistently generated at game start
	// Create simple literal object for leaderboard entry
	var newEntry = {
		name: currentPlayerName,
		score: LK.getScore(),
		wave: wave
	};
	// Create cleaned leaderboard first
	var cleanLeaderboard = [];
	for (var i = 0; i < leaderboard.length; i++) {
		var entry = leaderboard[i];
		cleanLeaderboard.push({
			name: String(entry.name),
			score: Number(entry.score),
			wave: Number(entry.wave)
		});
	}
	// Add new entry as literal object
	cleanLeaderboard.push({
		name: String(newEntry.name),
		score: Number(newEntry.score),
		wave: Number(newEntry.wave)
	});
	// Sort and limit to top 50
	cleanLeaderboard.sort(function (a, b) {
		return b.score - a.score;
	});
	if (cleanLeaderboard.length > 50) {
		cleanLeaderboard = cleanLeaderboard.slice(0, 50);
	}
	// Update local leaderboard and save to storage
	leaderboard = cleanLeaderboard;
	// Flatten leaderboard for storage (storage only accepts literals and 1-level objects)
	var flatLeaderboard = {};
	for (var i = 0; i < cleanLeaderboard.length; i++) {
		var entry = cleanLeaderboard[i];
		flatLeaderboard['name_' + i] = String(entry.name);
		flatLeaderboard['score_' + i] = Number(entry.score);
		flatLeaderboard['wave_' + i] = Number(entry.wave);
	}
	flatLeaderboard.length = cleanLeaderboard.length;
	storage.leaderboard = flatLeaderboard;
	// Update display
	updateLeaderboardDisplay();
}
// Set random background on game start
var backgroundAssets = ['background1', 'background2', 'background3', 'background4', 'background5', 'background6'];
var randomBackgroundId = backgroundAssets[Math.floor(Math.random() * backgroundAssets.length)];
var gameBackground = LK.getAsset(randomBackgroundId, {
	width: 2048,
	height: 2732,
	anchorX: 0,
	anchorY: 0
});
gameBackground.x = 0;
gameBackground.y = 0;
game.addChildAt(gameBackground, 0); // Add at bottom layer
// Ensure all health bar elements are above background
game.removeChild(healthBarOutline);
game.addChild(healthBarOutline);
game.removeChild(healthBarBg);
game.addChild(healthBarBg);
game.removeChild(healthBarFill);
game.addChild(healthBarFill);
game.removeChild(healthText);
game.addChild(healthText);
// Initialize player
player = game.addChild(new Player());
player.maxHealth = Math.round((maxHealthUpgrades + 1) * 2);
player.health = Math.round(player.maxHealth);
player.fireRate = Math.round(3 * Math.pow(1.1, fireRateUpgrades));
player.x = 1024;
player.y = 1366;
// Initialize controls
moveControl = LK.getAsset('moveControl', {
	anchorX: 0.5,
	anchorY: 0.5,
	alpha: 0
});
moveControl.x = 300;
moveControl.y = 2432;
game.addChild(moveControl);
moveStick = LK.getAsset('moveControl', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 0.3,
	scaleY: 0.3,
	alpha: 0
});
moveStick.x = moveControl.x;
moveStick.y = moveControl.y;
game.addChild(moveStick);
// Aim control removed - using automatic targeting
// Helper functions
function countHealthPacksOnScreen() {
	var healthPackCount = 0;
	for (var i = 0; i < pickups.length; i++) {
		if (pickups[i] instanceof HealthPack) {
			healthPackCount++;
		}
	}
	return healthPackCount;
}
function findNonOverlappingPosition(startX, startY) {
	var attempts = 0;
	var maxAttempts = 10;
	var minDistance = 80; // Minimum distance between pickups
	var finalX = startX;
	var finalY = startY;
	while (attempts < maxAttempts) {
		var overlapping = false;
		// Check distance from all existing pickups
		for (var i = 0; i < pickups.length; i++) {
			var existingPickup = pickups[i];
			var dx = finalX - existingPickup.x;
			var dy = finalY - existingPickup.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance < minDistance) {
				overlapping = true;
				break;
			}
		}
		if (!overlapping) {
			break; // Found a good position
		}
		// Try a new position in a circle around the original point
		var angle = Math.random() * Math.PI * 2;
		var radius = 40 + attempts * 20; // Increase radius with each attempt
		finalX = startX + Math.cos(angle) * radius;
		finalY = startY + Math.sin(angle) * radius;
		// Keep within screen bounds
		finalX = Math.max(60, Math.min(1988, finalX));
		finalY = Math.max(60, Math.min(2672, finalY));
		attempts++;
	}
	return {
		x: finalX,
		y: finalY
	};
}
function calculateCumulativeCost(upgradeLevel) {
	var totalCost = 0;
	for (var i = 0; i <= upgradeLevel; i++) {
		totalCost += Math.round((10 + i * 2) / 2);
	}
	return totalCost;
}
function resetGame() {
	// Set new random background on game reset
	var backgroundAssets = ['background1', 'background2', 'background3', 'background4', 'background5', 'background6'];
	var randomBackgroundId = backgroundAssets[Math.floor(Math.random() * backgroundAssets.length)];
	var newGameBackground = LK.getAsset(randomBackgroundId, {
		width: 2048,
		height: 2732,
		anchorX: 0,
		anchorY: 0
	});
	newGameBackground.x = 0;
	newGameBackground.y = 0;
	// Remove old background if it exists
	if (game.children[0] && game.children[0].width === 2048 && game.children[0].height === 2732) {
		game.children[0].destroy();
		game.removeChildAt(0);
	}
	game.addChildAt(newGameBackground, 0); // Add at bottom layer
	// Ensure all health bar elements are above background
	game.removeChild(healthBarOutline);
	game.addChild(healthBarOutline);
	game.removeChild(healthBarBg);
	game.addChild(healthBarBg);
	game.removeChild(healthBarFill);
	game.addChild(healthBarFill);
	game.removeChild(healthText);
	game.addChild(healthText);
	// Reset wave and zombies
	wave = 1;
	zombiesPerWave = 5;
	zombiesSpawned = 0;
	zombiesKilled = 0;
	spawnTimer = 0;
	hulksSpawned = 0; // Reset hulk spawn counter
	// Reset score and multipliers
	LK.setScore(0);
	scoreMultiplier = 1;
	killStreak = 0;
	killsSinceLastPowerUp = 0;
	lastPowerUpSpawn = 0;
	lastPowerUpType = null;
	// Reset powerup cycle tracking
	usedPowerUps = [];
	availablePowerUps = powerUpList.slice();
	// Reset powerups
	powerAmmo = 0;
	hasTripleShot = false;
	tripleShotLevel = 0;
	hasSniperPowerUp = false;
	sniperLevel = 0;
	sniperCooldown = 0;
	// Reset player state with upgrades
	player.maxHealth = Math.round((maxHealthUpgrades + 1) * 2);
	player.health = Math.round(player.maxHealth);
	player.fireRate = Math.round(3 * Math.pow(1.1, fireRateUpgrades));
	player.fireCooldown = 0;
	player.alpha = 1;
	// Clear all game objects
	for (var i = zombies.length - 1; i >= 0; i--) {
		zombies[i].destroy();
	}
	zombies = [];
	for (var i = bullets.length - 1; i >= 0; i--) {
		bullets[i].destroy();
	}
	bullets = [];
	for (var i = pickups.length - 1; i >= 0; i--) {
		pickups[i].destroy();
	}
	pickups = [];
	// Update UI
	waveText.setText('Wave: ' + wave);
	scoreText.setText('Score: ' + LK.getScore());
	hiScoreText.setText('Hi-Score: ' + hiScore);
	// Update health bar
	var healthPercent = player.health / player.maxHealth;
	var depletedPercent = 1 - healthPercent; // Invert to show depleted health
	healthBarFill.width = 1382.25 * depletedPercent;
	healthBarFill.height = 58.59375;
	healthText.setText(player.health + '/' + player.maxHealth);
	powerAmmoText.setText('Power Ammo: ' + powerAmmo);
	powerAmmoText.visible = false;
	// Reset player position
	player.x = 1024;
	player.y = 1366;
	// Reset no zombies timer
	noZombiesTimer = 0;
	// Update powerup display
	updatePowerupDisplay();
}
// Track hulks spawned for current wave
var hulksSpawned = 0;
function spawnZombie() {
	var zombie;
	// Spawn regular zombies first, then hulks at the end
	var regularZombiesCount = zombiesPerWave - wave; // Total zombies minus hulks
	if (zombiesSpawned < regularZombiesCount) {
		zombie = new Zombie();
	} else {
		zombie = new ZombieHulk();
		hulksSpawned++;
	}
	var side = Math.floor(Math.random() * 4);
	switch (side) {
		case 0:
			// Top
			zombie.x = Math.random() * 2048;
			zombie.y = -50;
			break;
		case 1:
			// Right
			zombie.x = 2098;
			zombie.y = Math.random() * 2732;
			break;
		case 2:
			// Bottom
			zombie.x = Math.random() * 2048;
			zombie.y = 2782;
			break;
		case 3:
			// Left
			zombie.x = -50;
			zombie.y = Math.random() * 2732;
			break;
	}
	zombie.speed = Math.round(zombie.baseSpeed * (1 + wave * 0.1) + (Math.random() - 0.5) * 2 * (zombie.baseSpeed * 0.25));
	zombie.health = Math.round(zombie.health + wave * 5);
	zombie.damage = Math.round(zombie.damage + Math.floor(wave * 2)); // Increase damage by 2 per wave
	zombie.scaleX = 0;
	zombie.scaleY = 0;
	zombie.alpha = 0;
	zombies.push(zombie);
	game.addChild(zombie);
	zombiesSpawned++;
	// Animate zombie spawn
	tween(zombie, {
		scaleX: 1,
		scaleY: 1,
		alpha: 1
	}, {
		duration: 300,
		easing: tween.easeOut
	});
}
function spawnPickup(x, y, zombie) {
	var shouldSpawn = false;
	var pickup;
	var powerUpType;
	// Helper function to find a non-overlapping position
	function findNonOverlappingPosition(startX, startY) {
		var attempts = 0;
		var maxAttempts = 10;
		var minDistance = 80; // Minimum distance between pickups
		var finalX = startX;
		var finalY = startY;
		while (attempts < maxAttempts) {
			var overlapping = false;
			// Check distance from all existing pickups
			for (var i = 0; i < pickups.length; i++) {
				var existingPickup = pickups[i];
				var dx = finalX - existingPickup.x;
				var dy = finalY - existingPickup.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance < minDistance) {
					overlapping = true;
					break;
				}
			}
			if (!overlapping) {
				break; // Found a good position
			}
			// Try a new position in a circle around the original point
			var angle = Math.random() * Math.PI * 2;
			var radius = 40 + attempts * 20; // Increase radius with each attempt
			finalX = startX + Math.cos(angle) * radius;
			finalY = startY + Math.sin(angle) * radius;
			// Keep within screen bounds
			finalX = Math.max(60, Math.min(1988, finalX));
			finalY = Math.max(60, Math.min(2672, finalY));
			attempts++;
		}
		return {
			x: finalX,
			y: finalY
		};
	}
	// Check if zombie hulk has powerup in inventory
	if (zombie instanceof ZombieHulk && zombie.hasPowerup) {
		shouldSpawn = true;
		// If all powerups have been used, reset the cycle
		if (availablePowerUps.length === 0) {
			availablePowerUps = powerUpList.slice(); // Reset available powerups
			usedPowerUps = []; // Clear used powerups
		}
		// Select random powerup from available list for hulk
		var randomIndex = Math.floor(Math.random() * availablePowerUps.length);
		powerUpType = availablePowerUps[randomIndex];
		// Move selected powerup from available to used
		usedPowerUps.push(powerUpType);
		availablePowerUps.splice(randomIndex, 1);
		if (powerUpType === 'powerShotPowerUp') {
			pickup = new PowerShotPowerUp();
		} else if (powerUpType === 'tripleShot') {
			pickup = new TripleShot();
		} else if (powerUpType === 'sniperPowerUp') {
			pickup = new SniperPowerUp();
		} else {
			// Check if healthpack would be spawned and limit is reached
			if (countHealthPacksOnScreen() >= 2) {
				// Replace with 2 zoin drops with non-overlapping positions
				var pos1 = findNonOverlappingPosition(x - 30, y);
				var pos2 = findNonOverlappingPosition(x + 30, y);
				var zoin1 = new Zoin();
				zoin1.x = pos1.x;
				zoin1.y = pos1.y;
				zoin1.scaleX = 0;
				zoin1.scaleY = 0;
				pickups.push(zoin1);
				game.addChild(zoin1);
				var zoin2 = new Zoin();
				zoin2.x = pos2.x;
				zoin2.y = pos2.y;
				zoin2.scaleX = 0;
				zoin2.scaleY = 0;
				pickups.push(zoin2);
				game.addChild(zoin2);
				// Animate both zoin spawns
				tween(zoin1, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 300,
					easing: tween.easeOut
				});
				tween(zoin2, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 300,
					easing: tween.easeOut
				});
				// Don't create healthpack
				pickup = null;
			} else {
				pickup = new HealthPack();
			}
		}
		killsSinceLastPowerUp = 0;
		if (pickup instanceof PowerShotPowerUp) {
			lastPowerUpSpawn = LK.ticks;
		}
	}
	// Force powerup spawn if 50+ kills without powerup (but not for normal zombies)
	else if (killsSinceLastPowerUp >= 50) {
		shouldSpawn = true;
		// If all powerups have been used, reset the cycle
		if (availablePowerUps.length === 0) {
			availablePowerUps = powerUpList.slice(); // Reset available powerups
			usedPowerUps = []; // Clear used powerups
		}
		// Select random powerup from available list
		var randomIndex = Math.floor(Math.random() * availablePowerUps.length);
		powerUpType = availablePowerUps[randomIndex];
		// Move selected powerup from available to used
		usedPowerUps.push(powerUpType);
		availablePowerUps.splice(randomIndex, 1);
		if (powerUpType === 'powerShotPowerUp') {
			pickup = new PowerShotPowerUp();
		} else if (powerUpType === 'tripleShot') {
			pickup = new TripleShot();
		} else if (powerUpType === 'sniperPowerUp') {
			pickup = new SniperPowerUp();
		} else {
			// Check if healthpack would be spawned and limit is reached
			if (countHealthPacksOnScreen() >= 2) {
				// Replace with 2 zoin drops with non-overlapping positions
				var pos1 = findNonOverlappingPosition(x - 30, y);
				var pos2 = findNonOverlappingPosition(x + 30, y);
				var zoin1 = new Zoin();
				zoin1.x = pos1.x;
				zoin1.y = pos1.y;
				zoin1.scaleX = 0;
				zoin1.scaleY = 0;
				pickups.push(zoin1);
				game.addChild(zoin1);
				var zoin2 = new Zoin();
				zoin2.x = pos2.x;
				zoin2.y = pos2.y;
				zoin2.scaleX = 0;
				zoin2.scaleY = 0;
				pickups.push(zoin2);
				game.addChild(zoin2);
				// Animate both zoin spawns
				tween(zoin1, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 300,
					easing: tween.easeOut
				});
				tween(zoin2, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 300,
					easing: tween.easeOut
				});
				// Don't create healthpack
				pickup = null;
			} else {
				pickup = new HealthPack();
			}
		}
		killsSinceLastPowerUp = 0;
		if (pickup instanceof PowerShotPowerUp) {
			lastPowerUpSpawn = LK.ticks;
		}
	}
	// No powerup spawn for normal zombies
	if (shouldSpawn && pickup) {
		// Find non-overlapping position for the pickup
		var position = findNonOverlappingPosition(x, y);
		pickup.x = position.x;
		pickup.y = position.y;
		pickup.scaleX = 0;
		pickup.scaleY = 0;
		pickups.push(pickup);
		game.addChild(pickup);
		// Animate pickup spawn with bounce effect
		tween(pickup, {
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 400,
			easing: tween.elasticOut
		});
	}
}
function fireBullet() {
	// Handle sniper firing independently
	if (hasSniperPowerUp && sniperCooldown <= 0) {
		// Find farthest zombie that is beyond normal bullet range (500px) and on screen
		var sniperTarget = null;
		var sniperDistance = 0; // Track farthest distance instead of closest
		var normalBulletRange = 500; // Normal bullet maximum range
		for (var i = 0; i < zombies.length; i++) {
			var zombie = zombies[i];
			if (!zombie || zombie.isDead) continue;
			var dx = zombie.x - player.x;
			var dy = zombie.y - player.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			// Only target zombies beyond normal bullet range and on screen
			if (distance > normalBulletRange && distance > sniperDistance && zombie.x >= -50 && zombie.x <= 2098 && zombie.y >= -50 && zombie.y <= 2782) {
				sniperDistance = distance;
				sniperTarget = zombie;
			}
		}
		if (sniperTarget) {
			var dx = sniperTarget.x - player.x;
			var dy = sniperTarget.y - player.y;
			var angle = Math.atan2(dy, dx);
			var sniperBullet = new SniperBullet();
			sniperBullet.x = player.x;
			sniperBullet.y = player.y;
			sniperBullet.damage = Math.round(100 + damageUpgrades * 50); // 10x base damage + upgrades
			sniperBullet.vx = Math.cos(angle) * sniperBullet.speed;
			sniperBullet.vy = Math.sin(angle) * sniperBullet.speed;
			sniperBullet.rotation = angle;
			// Visual effect for sniper bullet
			tween(sniperBullet, {
				scaleX: 2,
				scaleY: 2
			}, {
				duration: 100
			});
			bullets.push(sniperBullet);
			game.addChild(sniperBullet);
			// Calculate sniper fire rate: base rate decreases by 10% per sniper level (faster firing)
			var sniperFireRateWithUpgrade = Math.round(sniperFireRate * Math.pow(0.9, sniperLevel - 1));
			sniperCooldown = sniperFireRateWithUpgrade; // Reset sniper cooldown with improved rate
			LK.getSound('shoot').play();
		}
	}
	// Convert shots per second to ticks between shots (60 ticks = 1 second)
	var shotsPerSecond = powerAmmo > 0 ? player.fireRate * 0.25 : player.fireRate; // Power ammo shoots at 25% of normal rate
	var ticksBetweenShots = Math.max(1, Math.floor(60 / shotsPerSecond)); // Ensure at least 1 tick between shots
	if (player.fireCooldown > 0) return;
	// Find closest zombie in range
	var closestZombie = null;
	var closestDistance = 500; // Maximum firing range
	for (var i = 0; i < zombies.length; i++) {
		var zombie = zombies[i];
		if (!zombie || zombie.isDead) continue;
		var dx = zombie.x - player.x;
		var dy = zombie.y - player.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < closestDistance) {
			closestDistance = distance;
			closestZombie = zombie;
		}
	}
	// Only fire if there's a zombie in range
	if (!closestZombie) return;
	var dx = closestZombie.x - player.x;
	var dy = closestZombie.y - player.y;
	var angle = Math.atan2(dy, dx);
	// Player visual does not rotate - only bullets aim at target
	// Create bullets based on triple shot level
	var bulletCount = hasTripleShot ? 1 + tripleShotLevel * 2 : 1;
	var angleOffsets = [0]; // Always include center bullet
	if (hasTripleShot) {
		// Add bullets in pairs at increasing angles
		for (var level = 1; level <= tripleShotLevel; level++) {
			var angleOffset = level * 10 * Math.PI / 180;
			angleOffsets.push(-angleOffset); // Left bullet
			angleOffsets.push(angleOffset); // Right bullet
		}
	}
	// Consume power ammo once per shot, not per bullet
	var usingPowerAmmo = powerAmmo > 0;
	if (usingPowerAmmo) {
		powerAmmo--; // Consume one power ammo per shot
	}
	for (var b = 0; b < bulletCount; b++) {
		var bullet = new Bullet();
		bullet.x = player.x;
		bullet.y = player.y;
		bullet.damage = Math.round(10 + damageUpgrades * 5);
		var bulletAngle = angle + angleOffsets[b];
		bullet.vx = Math.cos(bulletAngle) * bullet.speed;
		bullet.vy = Math.sin(bulletAngle) * bullet.speed;
		bullet.rotation = bulletAngle;
		if (usingPowerAmmo) {
			bullet.piercing = true;
			bullet.maxDistance = 1600; // 2x distance
			bullet.damage = Math.round((10 + damageUpgrades * 5) * 5); // 5x normal damage
			// Visual effect for power bullet
			tween(bullet, {
				scaleX: 1.5,
				scaleY: 1.5
			}, {
				duration: 100
			});
			bullet.tint = 0xFFD700;
		} else {
			bullet.maxDistance = 800;
		}
		bullets.push(bullet);
		game.addChild(bullet);
	}
	player.fireCooldown = ticksBetweenShots;
	LK.getSound('shoot').play();
}
// Event handlers
game.down = function (x, y, obj) {
	// Prevent control stick activation in bottom 1/4 of viewport (below y = 2049)
	if (y > 2049) return;
	isDraggingMove = true;
	// Move moveControl to click position
	moveControl.x = x;
	moveControl.y = y;
	// Move moveStick to the same position (center of control)
	moveStick.x = x;
	moveStick.y = y;
	// Show control stick with smooth animation
	tween(moveControl, {
		alpha: 0.3
	}, {
		duration: 200,
		easing: tween.easeOut
	});
	tween(moveStick, {
		alpha: 0.6
	}, {
		duration: 200,
		easing: tween.easeOut
	});
};
game.move = function (x, y, obj) {
	if (isDraggingMove) {
		moveStick.x = Math.max(moveControl.x - 150, Math.min(moveControl.x + 150, x));
		moveStick.y = Math.max(moveControl.y - 150, Math.min(moveControl.y + 150, y));
	}
};
game.up = function (x, y, obj) {
	if (isDraggingMove) {
		isDraggingMove = false;
		moveStick.x = moveControl.x;
		moveStick.y = moveControl.y;
		// Hide control stick with smooth animation
		tween(moveControl, {
			alpha: 0
		}, {
			duration: 150,
			easing: tween.easeIn
		});
		tween(moveStick, {
			alpha: 0
		}, {
			duration: 150,
			easing: tween.easeIn
		});
	}
};
// Main game loop
game.update = function () {
	// Player movement
	if (isDraggingMove) {
		var moveX = (moveStick.x - moveControl.x) / 150;
		var moveY = (moveStick.y - moveControl.y) / 150;
		player.x += moveX * player.moveSpeed;
		player.y += moveY * player.moveSpeed;
		player.x = Math.max(40, Math.min(2008, player.x));
		player.y = Math.max(40, Math.min(2692, player.y));
	}
	// Update sniper cooldown
	if (sniperCooldown > 0) sniperCooldown--;
	// Auto-fire (fireBullet now handles range checking internally)
	fireBullet();
	// Spawn zombies
	if (zombiesSpawned < zombiesPerWave) {
		spawnTimer++;
		if (spawnTimer > 60) {
			spawnZombie();
			spawnTimer = 0;
		}
	} else if (zombies.length === 0) {
		// Next wave with transition
		wave++;
		zombiesPerWave = Math.min(5 + wave * 2, 30); // Cap at 30 zombies per wave to prevent performance issues
		zombiesSpawned = 0;
		zombiesKilled = 0;
		spawnTimer = 0; // Reset spawn timer for new wave
		noZombiesTimer = 0; // Reset no zombies timer
		hulksSpawned = 0; // Reset hulk spawn counter for new wave
		waveText.setText('Wave: ' + wave);
		transitionToNextWave();
	} else {
		// Check if there are zombies in view area (within screen bounds plus margin)
		var zombiesInView = false;
		for (var z = 0; z < zombies.length; z++) {
			var zombie = zombies[z];
			if (!zombie || zombie.isDead) continue;
			// Check if zombie is within view area (screen bounds + 200px margin)
			if (zombie.x >= -200 && zombie.x <= 2248 && zombie.y >= -200 && zombie.y <= 2932) {
				zombiesInView = true;
				break;
			}
		}
		// If no zombies in view, increment timer
		if (!zombiesInView && zombiesSpawned >= zombiesPerWave) {
			noZombiesTimer++;
			// If 10 seconds have passed without zombies in view, advance to next wave
			if (noZombiesTimer >= noZombiesThreshold) {
				// Remove all remaining zombies
				for (var i = zombies.length - 1; i >= 0; i--) {
					zombies[i].destroy();
					zombies.splice(i, 1);
				}
				// Next wave with transition
				wave++;
				zombiesPerWave = Math.min(5 + wave * 2, 30); // Cap at 30 zombies per wave to prevent performance issues
				zombiesSpawned = 0;
				zombiesKilled = 0;
				spawnTimer = 0; // Reset spawn timer for new wave
				noZombiesTimer = 0; // Reset no zombies timer
				hulksSpawned = 0; // Reset hulk spawn counter for new wave
				waveText.setText('Wave: ' + wave);
				transitionToNextWave();
			}
		} else {
			// Reset timer if zombies are in view or we haven't spawned all zombies yet
			noZombiesTimer = 0;
		}
	}
	// Update zombies
	for (var i = zombies.length - 1; i >= 0; i--) {
		var zombie = zombies[i];
		// Skip if zombie is undefined or dead
		if (!zombie || zombie.isDead) continue;
		// Move towards player
		var dx = player.x - zombie.x;
		var dy = player.y - zombie.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist > 0) {
			zombie.x += dx / dist * zombie.speed;
			zombie.y += dy / dist * zombie.speed;
			// Removed zombie rotation to keep zombies upright
		}
		// Check collision with player
		if (zombie.intersects(player) && zombie.attackCooldown === 0) {
			var playerDied = player.takeDamage(zombie.damage);
			zombie.attackCooldown = 60;
			killStreak = 0;
			scoreMultiplier = 1;
			// Check if player died after taking damage
			if (playerDied || player.health <= 0) {
				// Submit score to leaderboard before game over
				submitScoreToLeaderboard();
				LK.showGameOver();
				return; // Exit game loop immediately when player dies
			}
		}
	}
	// Check if player died during zombie processing - exit immediately
	if (player.health <= 0) {
		return;
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		// Check if bullet is off screen or traveled max distance
		if (bullet.x < -50 || bullet.x > 2098 || bullet.y < -50 || bullet.y > 2782 || bullet.travelDistance > bullet.maxDistance) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Check collision with zombies
		var bulletDestroyed = false;
		for (var j = zombies.length - 1; j >= 0; j--) {
			var zombie = zombies[j];
			if (!zombie || zombie.isDead) continue;
			if (bullet.intersects(zombie)) {
				if (zombie.takeDamage(bullet.damage)) {
					// Zombie died - add death animation
					spawnPickup(zombie.x, zombie.y, zombie);
					// 10% chance to drop 1 zoin when zombie dies
					if (Math.random() < 0.1) {
						// Find non-overlapping position for zoin drop
						var zoinPosition = findNonOverlappingPosition(zombie.x, zombie.y);
						var zoin = new Zoin();
						zoin.x = zoinPosition.x;
						zoin.y = zoinPosition.y;
						zoin.scaleX = 0;
						zoin.scaleY = 0;
						pickups.push(zoin);
						game.addChild(zoin);
						// Animate zoin spawn
						tween(zoin, {
							scaleX: 1,
							scaleY: 1
						}, {
							duration: 300,
							easing: tween.easeOut
						});
					}
					var zombieToRemove = zombie; // Capture zombie reference for closure
					var zombieIndex = j; // Capture index for closure
					tween(zombie, {
						scaleX: 0,
						scaleY: 0,
						alpha: 0,
						rotation: zombie.rotation + Math.PI
					}, {
						duration: 300,
						easing: tween.easeIn,
						onFinish: function onFinish() {
							zombieToRemove.destroy();
							// Remove from zombies array after animation
							var currentIndex = zombies.indexOf(zombieToRemove);
							if (currentIndex !== -1) {
								zombies.splice(currentIndex, 1);
							}
						}
					});
					zombiesKilled++;
					killStreak++;
					killsSinceLastPowerUp++;
					if (killStreak % 5 === 0) {
						scoreMultiplier = Math.min(scoreMultiplier + 1, 5);
					}
					// Give 2x score for ZombieHulk, regular score for normal zombies
					var scoreToAdd = zombie instanceof ZombieHulk ? 20 * scoreMultiplier : 10 * scoreMultiplier;
					LK.setScore(LK.getScore() + scoreToAdd);
					scoreText.setText('Score: ' + LK.getScore());
				}
				if (!bullet.piercing) {
					bullet.destroy();
					bullets.splice(i, 1);
					bulletDestroyed = true;
					break;
				}
			}
		}
		if (bulletDestroyed) continue;
	}
	// Update pickups
	for (var i = pickups.length - 1; i >= 0; i--) {
		var pickup = pickups[i];
		// Check if pickup has expired (10 seconds) - auto pickup non-healthpack items
		var age = LK.ticks - pickup.spawnTime;
		if (age >= pickup.lifespan) {
			// Auto pickup all items except health packs when expiring - healthpacks are perpetual
			if (pickup instanceof HealthPack) {
				// HealthPack no longer expires - skip expiration logic completely
				continue;
			} else if (pickup instanceof PowerShotPowerUp) {
				powerAmmo += pickup.ammoAmount;
				LK.effects.flashObject(player, 0xFFD700, 500);
			} else if (pickup instanceof TripleShot) {
				if (!hasTripleShot) {
					hasTripleShot = true;
					tripleShotLevel = 1;
				} else if (tripleShotLevel < maxTripleShotLevel) {
					tripleShotLevel++;
				}
				LK.effects.flashObject(player, 0x00FF00, 500);
			} else if (pickup instanceof SniperPowerUp) {
				hasSniperPowerUp = true;
				sniperLevel++; // Increase sniper level each time powerup is collected
				sniperCooldown = 0; // Ready to fire immediately
				LK.effects.flashObject(player, 0xFF0000, 500);
			} else if (pickup instanceof Zoin) {
				zoins++;
				storage.zoins = zoins; // Persist zoin count
				zoinText.setText('Zoins: ' + zoins);
				LK.effects.flashObject(player, 0xFFD700, 300);
			}
			LK.getSound('pickup').play();
			// Animate pickup collection
			tween(pickup, {
				scaleX: 2,
				scaleY: 2,
				alpha: 0
			}, {
				duration: 200,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					pickup.destroy();
				}
			});
			pickups.splice(i, 1);
			continue;
		}
		// Manual pickup when touching
		if (pickup.intersects(player)) {
			if (pickup instanceof HealthPack) {
				player.heal(pickup.healAmount);
			} else if (pickup instanceof PowerShotPowerUp) {
				powerAmmo += pickup.ammoAmount;
				LK.effects.flashObject(player, 0xFFD700, 500);
			} else if (pickup instanceof TripleShot) {
				if (!hasTripleShot) {
					hasTripleShot = true;
					tripleShotLevel = 1;
				} else if (tripleShotLevel < maxTripleShotLevel) {
					tripleShotLevel++;
				}
				LK.effects.flashObject(player, 0x00FF00, 500);
			} else if (pickup instanceof SniperPowerUp) {
				hasSniperPowerUp = true;
				sniperLevel++; // Increase sniper level each time powerup is collected
				sniperCooldown = 0; // Ready to fire immediately
				LK.effects.flashObject(player, 0xFF0000, 500);
			} else if (pickup instanceof Zoin) {
				zoins++;
				storage.zoins = zoins; // Persist zoin count
				zoinText.setText('Zoins: ' + zoins);
				LK.effects.flashObject(player, 0xFFD700, 300);
			}
			LK.getSound('pickup').play();
			// Animate pickup collection
			tween(pickup, {
				scaleX: 2,
				scaleY: 2,
				alpha: 0
			}, {
				duration: 200,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					pickup.destroy();
				}
			});
			pickups.splice(i, 1);
		}
	}
	// Update UI
	// Update hi-score if current score is higher
	var currentScore = LK.getScore();
	if (currentScore > hiScore) {
		hiScore = currentScore;
		storage.hiScore = hiScore;
		hiScoreText.setText('Hi-Score: ' + hiScore);
	}
	// Update health bar
	var healthPercent = player.health / player.maxHealth;
	var depletedPercent = 1 - healthPercent; // Invert to show depleted health
	healthBarFill.width = 1382.25 * depletedPercent;
	healthBarFill.height = 58.59375;
	healthText.setText(player.health + '/' + player.maxHealth);
	powerAmmoText.setText('Power Ammo: ' + powerAmmo);
	// Hide/show power ammo counter based on availability
	powerAmmoText.visible = powerAmmo > 0;
	// Update powerup display
	updatePowerupDisplay();
	// Update button state based on zoin availability
	var currentPrice = calculateCumulativeCost(maxHealthUpgrades);
	if (zoins < currentPrice) {
		bottomLeftButton.alpha = 0.5; // Dim button when unaffordable
		lifeLabel.alpha = 0.5;
		priceLabel.alpha = 0.5;
	} else {
		bottomLeftButton.alpha = 1.0; // Full opacity when affordable
		lifeLabel.alpha = 1.0;
		priceLabel.alpha = 1.0;
	}
	// Update fire rate button state based on zoin availability
	var fireRateCurrentPrice = calculateCumulativeCost(fireRateUpgrades);
	if (zoins < fireRateCurrentPrice) {
		secondButton.alpha = 0.5; // Dim button when unaffordable
		fireRateLabel.alpha = 0.5;
		fireRatePriceLabel.alpha = 0.5;
	} else {
		secondButton.alpha = 1.0; // Full opacity when affordable
		fireRateLabel.alpha = 1.0;
		fireRatePriceLabel.alpha = 1.0;
	}
	// Despawn distant pickups
	for (var i = pickups.length - 1; i >= 0; i--) {
		var pickup = pickups[i];
		var dx = player.x - pickup.x;
		var dy = player.y - pickup.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist > 2000) {
			pickup.destroy();
			pickups.splice(i, 1);
		}
	}
};
// Create bottom left button
var bottomLeftButton = LK.getAsset('ammoBox', {
	width: 250,
	height: 100,
	anchorX: 0,
	anchorY: 1
});
bottomLeftButton.tint = 0xFF0000; // Red background
bottomLeftButton.x = 20;
bottomLeftButton.y = -20;
LK.gui.bottomLeft.addChild(bottomLeftButton);
// Create black outline for button
var buttonOutline = LK.getAsset('ammoBox', {
	width: 256,
	height: 106,
	anchorX: 0,
	anchorY: 1
});
buttonOutline.tint = 0x000000; // Black outline
buttonOutline.x = 17;
buttonOutline.y = -17;
LK.gui.bottomLeft.addChildAt(buttonOutline, 0); // Add behind the button
// Create LIFE label for button
var lifeLabel = new Text2('LIFE', {
	size: 36,
	fill: 0xFFFFFF,
	font: "'Arial Black'"
});
lifeLabel.anchor.set(0.5, 0.5);
lifeLabel.x = 145; // Center of button (250/2 + 20 offset for button position)
lifeLabel.y = -70; // Center of button (100/2 + 20 offset for button position)
LK.gui.bottomLeft.addChild(lifeLabel);
// Create price label for button with dynamic pricing
var maxLifePrice = calculateCumulativeCost(maxHealthUpgrades);
var priceLabel = new Text2(maxLifePrice + ' Zoin' + (maxLifePrice === 1 ? '' : 's'), {
	size: 24,
	fill: 0xFFD700
});
priceLabel.anchor.set(0.5, 1);
priceLabel.x = 145; // Center of button horizontally
priceLabel.y = -25; // Bottom of button
LK.gui.bottomLeft.addChild(priceLabel);
// Make button interactive
bottomLeftButton.buttonMode = true;
// Add button click handlers
bottomLeftButton.down = function (x, y, obj) {
	var currentPrice = calculateCumulativeCost(maxHealthUpgrades);
	if (zoins < currentPrice) {
		return; // Don't allow clicking if insufficient zoins
	}
	// Change to white when pressed
	tween(bottomLeftButton, {
		tint: 0xFFFFFF
	}, {
		duration: 100,
		easing: tween.easeOut
	});
};
bottomLeftButton.up = function (x, y, obj) {
	var currentPrice = calculateCumulativeCost(maxHealthUpgrades);
	if (zoins < currentPrice) {
		return; // Don't allow clicking if insufficient zoins
	}
	// Deduct cost from zoins
	zoins = zoins - currentPrice;
	storage.zoins = zoins; // Persist updated zoin count
	zoinText.setText('Zoins: ' + zoins);
	// Increment upgrade level
	maxHealthUpgrades++;
	storage.maxHealthUpgrades = maxHealthUpgrades; // Persist upgrade level
	// Update player max health
	player.maxHealth = Math.round((maxHealthUpgrades + 1) * 2);
	player.health = player.maxHealth; // Full heal on upgrade
	// Update health bar to reflect new maximum
	var healthPercent = player.health / player.maxHealth;
	var depletedPercent = 1 - healthPercent; // Invert to show depleted health
	healthBarFill.width = 1382.25 * depletedPercent;
	healthBarFill.height = 58.59375;
	healthText.setText(player.health + '/' + player.maxHealth);
	// Update price label with new cost
	var newPrice = calculateCumulativeCost(maxHealthUpgrades);
	priceLabel.setText(newPrice + ' Zoin' + (newPrice === 1 ? '' : 's'));
	// Update powerup display
	updatePowerupDisplay();
	// Change back to red when released
	tween(bottomLeftButton, {
		tint: 0xFF0000
	}, {
		duration: 100,
		easing: tween.easeOut
	});
};
// Create second button next to the max life button
var secondButton = LK.getAsset('ammoBox', {
	width: 250,
	height: 100,
	anchorX: 0,
	anchorY: 1
});
secondButton.tint = 0xFFFF00; // Yellow background
secondButton.x = 290; // Position next to max life button (20 + 250 + 20 space = 290)
secondButton.y = -20;
LK.gui.bottomLeft.addChild(secondButton);
// Create black outline for second button
var secondButtonOutline = LK.getAsset('ammoBox', {
	width: 256,
	height: 106,
	anchorX: 0,
	anchorY: 1
});
secondButtonOutline.tint = 0x000000; // Black outline
secondButtonOutline.x = 287; // Position outline behind second button
secondButtonOutline.y = -17;
LK.gui.bottomLeft.addChildAt(secondButtonOutline, 0); // Add behind the button
// Create FIRE RATE label for second button
var fireRateLabel = new Text2('FIRE RATE', {
	size: 36,
	fill: 0xFFFFFF,
	font: "'Arial Black'"
});
fireRateLabel.anchor.set(0.5, 0.5);
fireRateLabel.x = 415; // Center of second button (250/2 + 290 offset for button position)
fireRateLabel.y = -70; // Center of button (100/2 + 20 offset for button position)
LK.gui.bottomLeft.addChild(fireRateLabel);
// Create price label for second button with dynamic pricing
var fireRatePrice = calculateCumulativeCost(fireRateUpgrades);
var fireRatePriceLabel = new Text2(fireRatePrice + ' Zoin' + (fireRatePrice === 1 ? '' : 's'), {
	size: 24,
	fill: 0xFFD700
});
fireRatePriceLabel.anchor.set(0.5, 1);
fireRatePriceLabel.x = 415; // Center of second button horizontally
fireRatePriceLabel.y = -25; // Bottom of button
LK.gui.bottomLeft.addChild(fireRatePriceLabel);
// Make second button interactive
secondButton.buttonMode = true;
// Add second button click handlers
secondButton.down = function (x, y, obj) {
	var currentPrice = calculateCumulativeCost(fireRateUpgrades);
	if (zoins < currentPrice) {
		return; // Don't allow clicking if insufficient zoins
	}
	// Change to white when pressed
	tween(secondButton, {
		tint: 0xFFFFFF
	}, {
		duration: 100,
		easing: tween.easeOut
	});
};
secondButton.up = function (x, y, obj) {
	var currentPrice = calculateCumulativeCost(fireRateUpgrades);
	if (zoins < currentPrice) {
		return; // Don't allow clicking if insufficient zoins
	}
	// Deduct cost from zoins
	zoins = zoins - currentPrice;
	storage.zoins = zoins; // Persist updated zoin count
	zoinText.setText('Zoins: ' + zoins);
	// Increment upgrade level
	fireRateUpgrades++;
	storage.fireRateUpgrades = fireRateUpgrades; // Persist upgrade level
	// Update player fire rate
	player.fireRate = Math.round(3 * Math.pow(1.1, fireRateUpgrades));
	// Update price label with new cost
	var newPrice = calculateCumulativeCost(fireRateUpgrades);
	fireRatePriceLabel.setText(newPrice + ' Zoin' + (newPrice === 1 ? '' : 's'));
	// Update powerup display
	updatePowerupDisplay();
	// Change back to yellow when released
	tween(secondButton, {
		tint: 0xFFFF00
	}, {
		duration: 100,
		easing: tween.easeOut
	});
};
// Create player name display at bottom center
var playerNameText = new Text2(currentPlayerName, {
	size: 45,
	fill: 0xFFFFFF
});
playerNameText.anchor.set(0.5, 0.5);
playerNameText.x = 0;
playerNameText.y = -70; // Center vertically with buttons (same as button labels)
playerNameText.buttonMode = true;
// Add click handler to randomize name
playerNameText.down = function (x, y, obj) {
	// Generate new random name
	var randomAdjective = adjectives[Math.floor(Math.random() * adjectives.length)];
	var randomName = commonNames[Math.floor(Math.random() * commonNames.length)];
	var newPlayerName = randomAdjective + '-' + randomName;
	// Update current player name and save to storage
	currentPlayerName = newPlayerName;
	storage.playerName = currentPlayerName;
	// Update display text
	playerNameText.setText(currentPlayerName);
	// Visual feedback - flash effect
	tween(playerNameText, {
		scaleX: 1.2,
		scaleY: 1.2
	}, {
		duration: 150,
		easing: tween.easeOut,
		onFinish: function onFinish() {
			tween(playerNameText, {
				scaleX: 1,
				scaleY: 1
			}, {
				duration: 150,
				easing: tween.easeOut
			});
		}
	});
};
LK.gui.bottom.addChild(playerNameText);
// Create powerup display container
var powerupDisplay = new Container();
powerupDisplay.x = 1024; // Center horizontally
powerupDisplay.y = 280; // Below leaderboard area
game.addChild(powerupDisplay);
// Powerup display background removed
// Triple Shot powerup icon and level
var tripleShotIcon = new TripleShot();
tripleShotIcon.x = -540;
tripleShotIcon.y = 0;
tripleShotIcon.visible = false;
powerupDisplay.addChild(tripleShotIcon);
var tripleShotLevelText = new Text2('Lv.1', {
	size: 72,
	fill: 0xFFFFFF
});
tripleShotLevelText.anchor.set(0.5, 0.5);
tripleShotLevelText.x = -540;
tripleShotLevelText.y = 75;
tripleShotLevelText.visible = false;
powerupDisplay.addChild(tripleShotLevelText);
// Power Ammo display
var powerAmmoIcon = new PowerShotPowerUp();
powerAmmoIcon.x = -180;
powerAmmoIcon.y = 0;
powerAmmoIcon.visible = false;
powerupDisplay.addChild(powerAmmoIcon);
var powerAmmoCountText = new Text2('x0', {
	size: 72,
	fill: 0xFFD700
});
powerAmmoCountText.anchor.set(0.5, 0.5);
powerAmmoCountText.x = -180;
powerAmmoCountText.y = 75;
powerAmmoCountText.visible = false;
powerupDisplay.addChild(powerAmmoCountText);
// Sniper powerup display
var sniperIcon = new SniperPowerUp();
sniperIcon.x = 180;
sniperIcon.y = 0;
sniperIcon.visible = false;
powerupDisplay.addChild(sniperIcon);
var sniperCooldownText = new Text2('READY', {
	size: 72,
	fill: 0xFF0000
});
sniperCooldownText.anchor.set(0.5, 0.5);
sniperCooldownText.x = 180;
sniperCooldownText.y = 75;
sniperCooldownText.visible = false;
powerupDisplay.addChild(sniperCooldownText);
// Wave transition function with fade effects
function transitionToNextWave() {
	// Change background immediately without fade overlay
	var backgroundAssets = ['background1', 'background2', 'background3', 'background4', 'background5', 'background6'];
	var randomBackgroundId = backgroundAssets[Math.floor(Math.random() * backgroundAssets.length)];
	var newGameBackground = LK.getAsset(randomBackgroundId, {
		width: 2048,
		height: 2732,
		anchorX: 0,
		anchorY: 0
	});
	newGameBackground.x = 0;
	newGameBackground.y = 0;
	// Remove old background if it exists
	if (game.children[0] && game.children[0].width === 2048 && game.children[0].height === 2732) {
		game.children[0].destroy();
		game.removeChildAt(0);
	}
	game.addChildAt(newGameBackground, 0);
	// Ensure all health bar elements are above background
	game.removeChild(healthBarOutline);
	game.addChild(healthBarOutline);
	game.removeChild(healthBarBg);
	game.addChild(healthBarBg);
	game.removeChild(healthBarFill);
	game.addChild(healthBarFill);
	game.removeChild(healthText);
	game.addChild(healthText);
	// Ensure leaderboard stays visible during transition
	game.removeChild(leaderboardText);
	game.addChild(leaderboardText);
	// Ensure player visibility
	player.alpha = 1;
	player.visible = true;
	// Move player to topmost layer after wave transition
	game.removeChild(player);
	game.addChild(player);
}
// Update function for powerup display
function updatePowerupDisplay() {
	// Update Triple Shot display
	if (hasTripleShot) {
		tripleShotIcon.visible = true;
		tripleShotLevelText.visible = true;
		tripleShotLevelText.setText('Lv.' + tripleShotLevel);
	} else {
		tripleShotIcon.visible = false;
		tripleShotLevelText.visible = false;
	}
	// Update Power Ammo display
	if (powerAmmo > 0) {
		powerAmmoIcon.visible = true;
		powerAmmoCountText.visible = true;
		powerAmmoCountText.setText('x' + powerAmmo);
	} else {
		powerAmmoIcon.visible = false;
		powerAmmoCountText.visible = false;
	}
	// Update Sniper display
	if (hasSniperPowerUp) {
		sniperIcon.visible = true;
		sniperCooldownText.visible = true;
		var cooldownSeconds = Math.max(0, Math.ceil(sniperCooldown / 60));
		sniperCooldownText.setText(cooldownSeconds > 0 ? cooldownSeconds + 's' : 'READY');
	} else {
		sniperIcon.visible = false;
		sniperCooldownText.visible = false;
	}
}
// Start music
LK.playMusic('battleMusic');
// Ensure player is always on top layer
game.removeChild(player);
game.addChild(player);
// Ensure powerup display is always on top layer
game.removeChild(powerupDisplay);
game.addChild(powerupDisplay);
;
;