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

/**** 
* Classes
****/ 
var Lawnmower = Container.expand(function (row) {
	var self = Container.call(this);
	self.gridY = row;
	self.speed = 0;
	self.isActivated = false;
	self.x = gridStartX - 100;
	self.y = gridStartY + row * cellSize;
	var graphics = self.attachAsset('lawnmower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.activate = function () {
		if (!self.isActivated) {
			self.isActivated = true;
			self.speed = 6.4;
		}
	};
	self.update = function () {
		if (self.isActivated) {
			self.x += self.speed;
			// Check collision with zombies
			for (var i = 0; i < enemies.length; i++) {
				var enemy = enemies[i];
				if (enemy.gridY === self.gridY && self.intersects(enemy)) {
					enemy.die();
				}
			}
			// Remove lawnmower when it reaches right edge
			if (self.x > 2148) {
				self.removeFromGame();
			}
		}
	};
	self.removeFromGame = function () {
		for (var i = 0; i < lawnmowers.length; i++) {
			if (lawnmowers[i] === self) {
				lawnmowers.splice(i, 1);
				break;
			}
		}
		self.destroy();
	};
	return self;
});
var PlantBase = Container.expand(function (plantType) {
	var self = Container.call(this);
	self.plantType = plantType;
	self.health = 100;
	self.maxHealth = 100;
	self.cost = 50;
	self.shootTimer = 0;
	self.shootDelay = 72;
	self.gridX = 0;
	self.gridY = 0;
	self.level = 1;
	var graphics = self.attachAsset(plantType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.takeDamage = function (damage) {
		self.health -= damage;
		LK.effects.flashObject(self, 0xFF0000, 200);
		if (self.health <= 0) {
			self.die();
		}
	};
	self.die = function () {
		// Clean up projectile tracking for this plant
		var plantId = self.gridX + '_' + self.gridY;
		if (plantProjectileCount[plantId]) {
			delete plantProjectileCount[plantId];
		}
		plants[self.gridY][self.gridX] = null;
		self.destroy();
	};
	return self;
});
var Wallnut = PlantBase.expand(function () {
	var self = PlantBase.call(this, 'wallnut');
	self.cost = 50;
	self.health = 300;
	self.maxHealth = 300;
	self.isDamaged = false;
	var originalTakeDamage = self.takeDamage;
	self.takeDamage = function (damage) {
		originalTakeDamage(damage);
		// Check if wallnut should switch to damaged appearance
		if (self.health < 150 && !self.isDamaged) {
			self.isDamaged = true;
			// Remove current graphics and add damaged version
			self.removeChild(self.children[0]);
			var damagedGraphics = self.attachAsset('wallnut_damaged', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		}
	};
	return self;
});
var Sunflower = PlantBase.expand(function () {
	var self = PlantBase.call(this, 'sunflower');
	self.cost = 50;
	self.sunTimer = 0;
	self.update = function () {
		self.sunTimer++;
		if (self.sunTimer >= 1080) {
			// 18 seconds
			var sun = new Sun(self.x, self.y - 60);
			suns.push(sun);
			game.addChild(sun);
			self.sunTimer = 0;
			LK.effects.flashObject(self, 0xFFFF00, 300);
		}
	};
	return self;
});
var SnowPea = PlantBase.expand(function () {
	var self = PlantBase.call(this, 'snowpea');
	self.cost = 175;
	self.update = function () {
		self.shootTimer++;
		if (self.shootTimer >= self.shootDelay) {
			var target = self.findTarget();
			if (target) {
				self.shoot(target);
				self.shootTimer = 0;
			}
		}
	};
	self.findTarget = function () {
		for (var i = 0; i < enemies.length; i++) {
			var enemy = enemies[i];
			if (enemy.gridY === self.gridY && enemy.x > self.x) {
				return enemy;
			}
		}
		return null;
	};
	self.shoot = function (target) {
		var plantId = self.gridX + '_' + self.gridY; // Unique plant identifier
		var snowball = createProjectile('snowball', self.x, self.y, 6.4, 20 * self.level, plantId);
		if (snowball) {
			LK.getSound('shoot').play();
		}
	};
	return self;
});
var Repetidora = PlantBase.expand(function () {
	var self = PlantBase.call(this, 'peashooter');
	self.cost = 200;
	self.isShootingSecondPea = false;
	self.secondPeaTimer = 0;
	self.update = function () {
		self.shootTimer++;
		if (self.shootTimer >= self.shootDelay) {
			var target = self.findTarget();
			if (target && !self.isShootingSecondPea) {
				self.shoot(target);
				self.shootTimer = 0;
				self.isShootingSecondPea = true;
				self.secondPeaTimer = 18; // 0.3 seconds at 60fps
			}
		}
		// Handle second pea timing
		if (self.isShootingSecondPea) {
			self.secondPeaTimer--;
			if (self.secondPeaTimer <= 0) {
				var target = self.findTarget();
				if (target) {
					self.shoot(target);
				}
				self.isShootingSecondPea = false;
			}
		}
	};
	self.findTarget = function () {
		for (var i = 0; i < enemies.length; i++) {
			var enemy = enemies[i];
			if (enemy.gridY === self.gridY && enemy.x > self.x) {
				return enemy;
			}
		}
		return null;
	};
	self.shoot = function (target) {
		var plantId = self.gridX + '_' + self.gridY; // Unique plant identifier
		var pea = createProjectile('pea', self.x, self.y, 6.4, 20 * self.level, plantId);
		if (pea) {
			LK.getSound('shoot').play();
		}
	};
	return self;
});
var Peashooter = PlantBase.expand(function () {
	var self = PlantBase.call(this, 'peashooter');
	self.cost = 100;
	self.update = function () {
		self.shootTimer++;
		if (self.shootTimer >= self.shootDelay) {
			var target = self.findTarget();
			if (target) {
				self.shoot(target);
				self.shootTimer = 0;
			}
		}
	};
	self.findTarget = function () {
		for (var i = 0; i < enemies.length; i++) {
			var enemy = enemies[i];
			if (enemy.gridY === self.gridY && enemy.x > self.x) {
				return enemy;
			}
		}
		return null;
	};
	self.shoot = function (target) {
		var plantId = self.gridX + '_' + self.gridY; // Unique plant identifier
		var pea = createProjectile('pea', self.x, self.y, 6.4, 20 * self.level, plantId);
		if (pea) {
			LK.getSound('shoot').play();
		}
	};
	return self;
});
var Projectile = Container.expand(function (type, startX, startY, speed, damage) {
	var self = Container.call(this);
	self.speed = speed;
	self.damage = damage;
	self.x = startX;
	self.y = startY;
	self.type = type;
	self.gridY = Math.floor((startY - gridStartY + cellSize / 2) / cellSize);
	self.ownerId = null; // Plant that owns this projectile
	var graphics = self.attachAsset(type, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		self.x += self.speed;
		if (self.x > 2048) {
			self.removeFromGame();
			return;
		}
		// Only check collisions with zombies in same row and within 100px range
		for (var i = 0; i < enemies.length; i++) {
			var enemy = enemies[i];
			if (enemy.gridY === self.gridY && Math.abs(enemy.x - self.x) <= 100 && self.intersects(enemy)) {
				enemy.takeDamage(self.damage);
				self.removeFromGame();
				break;
			}
		}
	};
	self.removeFromGame = function () {
		// Decrease projectile count for the plant that owns this projectile
		if (self.ownerId && plantProjectileCount[self.ownerId]) {
			plantProjectileCount[self.ownerId]--;
		}
		for (var i = 0; i < projectiles.length; i++) {
			if (projectiles[i] === self) {
				projectiles.splice(i, 1);
				break;
			}
		}
		// Return to pool instead of destroying
		self.returnToPool();
	};
	self.returnToPool = function () {
		if (projectilePool.length < maxPoolSize) {
			self.removeChildren();
			if (self.parent) {
				self.parent.removeChild(self);
			}
			projectilePool.push(self);
		} else {
			self.destroy();
		}
	};
	return self;
});
var SlowProjectile = Projectile.expand(function (type, startX, startY, speed, damage) {
	var self = Projectile.call(this, type, startX, startY, speed, damage);
	var originalUpdate = self.update;
	self.update = function () {
		originalUpdate();
		// Only check collisions with zombies in same row and within 100px range
		for (var i = 0; i < enemies.length; i++) {
			var enemy = enemies[i];
			if (enemy.gridY === self.gridY && Math.abs(enemy.x - self.x) <= 100 && self.intersects(enemy)) {
				enemy.applySlowEffect();
				break;
			}
		}
	};
	return self;
});
var Sun = Container.expand(function (x, y) {
	var self = Container.call(this);
	self.x = x;
	self.y = y;
	self.value = 25;
	self.collectTimer = 0;
	var graphics = self.attachAsset('sun', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.down = function (x, y, obj) {
		sunPoints += self.value;
		updateSunDisplay();
		self.collect();
	};
	self.collect = function () {
		for (var i = 0; i < suns.length; i++) {
			if (suns[i] === self) {
				suns.splice(i, 1);
				break;
			}
		}
		self.destroy();
	};
	self.update = function () {
		self.collectTimer++;
		if (self.collectTimer > 720) {
			// 12 seconds timeout
			self.collect();
		}
	};
	return self;
});
var ZombieBase = Container.expand(function (zombieType) {
	var self = Container.call(this);
	self.zombieType = zombieType;
	self.health = 190;
	self.maxHealth = 190;
	self.speed = 0.8;
	self.damage = 25;
	self.gridY = 0;
	self.attackTimer = 0;
	self.slowTimer = 0;
	self.originalSpeed = self.speed;
	var graphics = self.attachAsset(zombieType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.takeDamage = function (damage) {
		self.health -= damage;
		LK.effects.flashObject(self, 0xFF0000, 200);
		LK.getSound('zombie_hit').play();
		if (self.health <= 0) {
			self.die();
		}
	};
	self.die = function () {
		// Check if this is Zombiestein being killed
		if (self.zombieType === 'zombiestein') {
			zombiesteinAlive = false;
		}
		for (var i = 0; i < enemies.length; i++) {
			if (enemies[i] === self) {
				enemies.splice(i, 1);
				break;
			}
		}
		self.destroy();
	};
	self.applySlowEffect = function () {
		self.slowTimer = 180;
		self.speed = self.originalSpeed * 0.5;
		graphics.tint = 0x81C784;
	};
	self.update = function () {
		if (self.slowTimer > 0) {
			self.slowTimer--;
			if (self.slowTimer === 0) {
				self.speed = self.originalSpeed;
				graphics.tint = 0xFFFFFF;
			}
		}
		var plantInFront = self.getPlantInFront();
		if (plantInFront) {
			self.attackTimer++;
			if (self.attackTimer >= 72) {
				plantInFront.takeDamage(self.damage);
				self.attackTimer = 0;
			}
		} else {
			self.x -= self.speed;
			// Check if zombie reached left screen edge
			if (self.x < 0) {
				LK.effects.flashScreen(0xFF0000, 1000);
				LK.showGameOver();
				return;
			}
			// Check collision with lawnmower
			for (var i = 0; i < lawnmowers.length; i++) {
				var lawnmower = lawnmowers[i];
				if (lawnmower.gridY === self.gridY && self.x <= lawnmower.x + 60 && !lawnmower.isActivated) {
					lawnmower.activate();
				}
			}
		}
	};
	self.getPlantInFront = function () {
		var cellX = Math.floor((self.x - gridStartX) / cellSize);
		if (cellX >= 0 && cellX < gridCols && plants[self.gridY] && plants[self.gridY][cellX]) {
			return plants[self.gridY][cellX];
		}
		return null;
	};
	return self;
});
var Zombiestein = ZombieBase.expand(function () {
	var self = ZombieBase.call(this, 'zombiestein');
	self.health = 3000;
	self.maxHealth = 3000;
	self.speed = 0.92; // 15% faster than original 0.8 speed
	self.originalSpeed = 0.92;
	self.damage = 500; // 500 damage per second
	self.isSummoning = false;
	self.hasSpawnedZombidito = false;
	self.originalUpdate = self.update;
	self.update = function () {
		// Check if health is below 1500 and hasn't spawned Zombidito yet
		if (self.health < 1500 && !self.hasSpawnedZombidito && !self.isSummoning) {
			self.isSummoning = true;
			self.speed = 0; // Stop moving completely
			// Wait 1.5 seconds then spawn Zombidito
			LK.setTimeout(function () {
				// Resume movement
				self.speed = self.originalSpeed;
				self.isSummoning = false;
				self.hasSpawnedZombidito = true;
				// Calculate position 3 cells ahead (in front of Zombiestein)
				var spawnX = self.x - 3 * cellSize;
				var spawnY = self.y;
				// Create Zombidito with explosion effect
				var zombidito = new Zombidito();
				zombidito.x = spawnX;
				zombidito.y = spawnY;
				zombidito.gridY = self.gridY;
				enemies.push(zombidito);
				game.addChild(zombidito);
				// Create explosion effect like miner zombie
				var explosion = LK.getAsset('explosion', {
					anchorX: 0.5,
					anchorY: 0.5,
					x: spawnX,
					y: spawnY,
					scaleX: 2,
					scaleY: 2
				});
				game.addChild(explosion);
				// Animate explosion and remove it
				tween(explosion, {
					scaleX: 0.1,
					scaleY: 0.1,
					alpha: 0
				}, {
					duration: 800,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						explosion.destroy();
					}
				});
			}, 1500);
		}
		// Call original update only if not summoning (stopped)
		if (!self.isSummoning) {
			self.originalUpdate();
		}
	};
	return self;
});
var Zombie = ZombieBase.expand(function () {
	var self = ZombieBase.call(this, 'zombie');
	self.health = 190;
	self.maxHealth = 190;
	self.speed = 0.8;
	self.originalSpeed = 0.8;
	return self;
});
var Zombidito = ZombieBase.expand(function () {
	var self = ZombieBase.call(this, 'zombie');
	self.health = 250;
	self.maxHealth = 250;
	self.speed = 0.8;
	self.originalSpeed = 0.8;
	self.damage = 50; // 50 damage per second
	// Scale down the graphics to make it smaller
	var graphics = self.children[0];
	if (graphics) {
		graphics.scaleX = 0.7;
		graphics.scaleY = 0.7;
	}
	return self;
});
var SunZombie = ZombieBase.expand(function () {
	var self = ZombieBase.call(this, 'sun_zombie');
	self.health = 190;
	self.maxHealth = 190;
	self.speed = 0.8;
	self.originalSpeed = 0.8;
	// Override die function to drop a sun when killed
	var originalDie = self.die;
	self.die = function () {
		// Create a sun at zombie's position
		var droppedSun = new Sun(self.x, self.y);
		suns.push(droppedSun);
		game.addChild(droppedSun);
		// Call original die function
		originalDie();
	};
	return self;
});
var MinerZombie = ZombieBase.expand(function () {
	var self = ZombieBase.call(this, 'miner_zombie');
	self.health = 190;
	self.maxHealth = 190;
	self.speed = 0.8;
	self.originalSpeed = 0.8;
	// Override the initialization to spawn at 5th column and show explosion
	self.initializeMiner = function (row) {
		self.gridY = row;
		// Position at 5th column (index 4)
		self.x = gridStartX + 4 * cellSize;
		self.y = gridStartY + row * cellSize;
		// Create explosion effect
		var explosion = LK.getAsset('explosion', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: self.x,
			y: self.y,
			scaleX: 2,
			scaleY: 2
		});
		game.addChild(explosion);
		// Animate explosion and remove it
		tween(explosion, {
			scaleX: 0.1,
			scaleY: 0.1,
			alpha: 0
		}, {
			duration: 800,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				explosion.destroy();
			}
		});
	};
	return self;
});
var ConeZombie = ZombieBase.expand(function () {
	var self = ZombieBase.call(this, 'cone_zombie');
	self.health = 300;
	self.maxHealth = 300;
	self.speed = 0.8;
	self.originalSpeed = 0.8;
	self.hasChangedAsset = false;
	var originalTakeDamage = self.takeDamage;
	self.takeDamage = function (damage) {
		originalTakeDamage(damage);
		// Check if cone zombie should switch to normal zombie appearance
		if (self.health < 191 && !self.hasChangedAsset) {
			self.hasChangedAsset = true;
			// Remove current graphics and add normal zombie version
			self.removeChild(self.children[0]);
			var normalGraphics = self.attachAsset('zombie', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		}
	};
	return self;
});
var BucketZombie = ZombieBase.expand(function () {
	var self = ZombieBase.call(this, 'bucket_zombie');
	self.health = 375;
	self.maxHealth = 375;
	self.speed = 0.8;
	self.originalSpeed = 0.8;
	self.hasChangedAsset = false;
	var originalTakeDamage = self.takeDamage;
	self.takeDamage = function (damage) {
		originalTakeDamage(damage);
		// Check if bucket zombie should switch to normal zombie appearance
		if (self.health < 191 && !self.hasChangedAsset) {
			self.hasChangedAsset = true;
			// Remove current graphics and add normal zombie version
			self.removeChild(self.children[0]);
			var normalGraphics = self.attachAsset('zombie', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1B5E20
});

/**** 
* Game Code
****/ 
// Sounds
// UI and grid
// Undead enemies
// Projectiles
// Plant defenders
// Grid setup - bigger grid centered on screen
var gridRows = 5;
var gridCols = 9;
var cellSize = 144;
var gridStartX = (2048 - gridCols * cellSize) / 2;
var gridStartY = (2732 - gridRows * cellSize) / 2;
// Game state
var plants = [];
var enemies = [];
var projectiles = [];
var suns = [];
var lawnmowers = [];
var sunPoints = 500;
var lives = 3;
var currentWave = 1;
var wavesCompleted = 0;
var totalWaves = 10;
var waveInProgress = false;
var enemiesInWave = 0;
var enemiesKilled = 0;
var sunTimer = 0;
var waveStartTick = 0;
var nextWaveScheduled = false;
var sunZombieSpawnedThisWave = false;
// Miner zombie tracking
var minerZombiesSpawnedThisWave = 0;
var maxMinerZombiesPerWave = 1;
// Zombiestein tracking
var zombiesteinSpawned = false;
var zombiesteinAlive = false;
// Performance optimization variables
var maxObjectsPerType = 50;
var cleanupCounter = 0;
var lagOptimizationActive = false;
// Projectile pool for object reuse
var projectilePool = [];
var maxPoolSize = 20;
// Track active projectiles per plant
var plantProjectileCount = {};
// Selected plant type
var selectedPlantType = null;
var plantTypes = ['sunflower', 'peashooter', 'wallnut', 'repetidora'];
var plantCosts = {
	'peashooter': 100,
	'sunflower': 50,
	'wallnut': 50,
	'repetidora': 200
};
// Wallnut cooldown system
var wallnutCooldown = 0;
var wallnutCooldownTime = 720; // 12 seconds at 60fps
// Ghost plant for preview
var ghostPlant = null;
// Initialize grid cells array
var gridCells = [];
// Initialize grid
for (var row = 0; row < gridRows; row++) {
	plants[row] = [];
	gridCells[row] = [];
	for (var col = 0; col < gridCols; col++) {
		plants[row][col] = null;
		var cell = LK.getAsset('gridcell', {
			anchorX: 0.5,
			anchorY: 0.5,
			alpha: 0.3,
			x: gridStartX + col * cellSize,
			y: gridStartY + row * cellSize
		});
		gridCells[row][col] = cell;
		game.addChild(cell);
	}
}
// Initialize lawnmowers
for (var row = 0; row < gridRows; row++) {
	var lawnmower = new Lawnmower(row);
	lawnmowers.push(lawnmower);
	game.addChild(lawnmower);
}
// Shovel tool for removing plants
var selectedTool = null; // 'shovel' or null
var shovelButton = LK.getAsset('shovel', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 100,
	scaleX: 1.5,
	scaleY: 1.5
});
shovelButton.interactive = true;
shovelButton.buttonMode = true;
shovelButton.down = function (x, y, obj) {
	console.log("Shovel button clicked");
	if (selectedTool === 'shovel') {
		selectedTool = null;
		shovelButton.alpha = 0.8;
		shovelButton.scaleX = shovelButton.scaleY = 1.5;
	} else {
		selectedTool = 'shovel';
		selectedPlantType = null;
		shovelButton.alpha = 1.0;
		shovelButton.scaleX = shovelButton.scaleY = 1.8;
		updatePlantSelection();
	}
};
shovelButton.alpha = 0.8;
game.addChild(shovelButton);
// UI Elements
var sunDisplay = new Text2('Sun: ' + sunPoints, {
	size: 60,
	fill: 0xFFEB3B
});
sunDisplay.anchor.set(0, 0);
sunDisplay.x = 120; // Offset from left edge to avoid menu icon
LK.gui.topLeft.addChild(sunDisplay);
var livesDisplay = new Text2('Lives: ' + lives, {
	size: 60,
	fill: 0xF44336
});
livesDisplay.anchor.set(0, 0);
livesDisplay.y = 80;
LK.gui.topRight.addChild(livesDisplay);
var waveDisplay = new Text2('Wave: ' + currentWave + '/' + totalWaves, {
	size: 50,
	fill: 0x4CAF50
});
waveDisplay.anchor.set(0.5, 0);
LK.gui.top.addChild(waveDisplay);
// Plant selection UI at bottom
var plantButtons = [];
var uiY = 2732 - 150;
for (var i = 0; i < plantTypes.length; i++) {
	var button = LK.getAsset(plantTypes[i], {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 200 + i * 220,
		y: uiY,
		scaleX: 2.25,
		scaleY: 2.25
	});
	button.plantType = plantTypes[i];
	button.interactive = true; // Enable button interactivity
	button.buttonMode = true; // Make it behave like a button
	button.down = function (x, y, obj) {
		console.log("Plant button clicked:", this.plantType, "Cost:", plantCosts[this.plantType], "Current suns:", sunPoints);
		// Check wallnut cooldown
		if (this.plantType === 'wallnut' && wallnutCooldown > 0) {
			return; // Don't allow selection during cooldown
		}
		if (sunPoints >= plantCosts[this.plantType]) {
			selectedPlantType = this.plantType;
			selectedTool = null;
			shovelButton.alpha = 0.8;
			shovelButton.scaleX = shovelButton.scaleY = 1.5;
			updatePlantSelection();
		}
	};
	game.addChild(button);
	plantButtons.push(button);
	// Add cost text
	var costText = new Text2(plantCosts[plantTypes[i]], {
		size: 40,
		fill: 0xFFFFFF
	});
	costText.anchor.set(0.5, 0);
	costText.x = button.x;
	costText.y = button.y + 80;
	game.addChild(costText);
}
function updatePlantSelection() {
	for (var i = 0; i < plantButtons.length; i++) {
		if (plantButtons[i].plantType === selectedPlantType) {
			plantButtons[i].alpha = 1.0;
			plantButtons[i].scaleX = plantButtons[i].scaleY = 2.55;
		} else if (plantButtons[i].plantType === 'wallnut' && wallnutCooldown > 0) {
			// Gray out wallnut during cooldown
			plantButtons[i].alpha = 0.3;
			plantButtons[i].scaleX = plantButtons[i].scaleY = 2.25;
			plantButtons[i].tint = 0x888888;
		} else {
			plantButtons[i].alpha = 0.6;
			plantButtons[i].scaleX = plantButtons[i].scaleY = 2.25;
			plantButtons[i].tint = 0xFFFFFF;
		}
	}
	// Remove existing ghost plant
	if (ghostPlant) {
		ghostPlant.destroy();
		ghostPlant = null;
	}
	// Create new ghost plant if a type is selected
	if (selectedPlantType) {
		ghostPlant = LK.getAsset(selectedPlantType, {
			anchorX: 0.5,
			anchorY: 0.5,
			alpha: 0.6,
			tint: 0x88FF88
		});
		game.addChild(ghostPlant);
	}
	// Highlight valid placement squares
	for (var row = 0; row < gridRows; row++) {
		for (var col = 0; col < gridCols; col++) {
			if (selectedPlantType && canPlacePlant(col, row, selectedPlantType)) {
				// Green highlight for valid empty squares
				gridCells[row][col].tint = 0x00FF00;
				gridCells[row][col].alpha = 0.7;
			} else if (selectedPlantType && plants[row][col] !== null) {
				// Red highlight for occupied squares when plant is selected
				gridCells[row][col].tint = 0xFF0000;
				gridCells[row][col].alpha = 0.5;
			} else if (selectedTool === 'shovel' && plants[row][col] !== null) {
				// Yellow highlight for plants that can be removed with shovel
				gridCells[row][col].tint = 0xFFFF00;
				gridCells[row][col].alpha = 0.7;
			} else {
				// Normal appearance for unselected or invalid squares
				gridCells[row][col].tint = 0xFFFFFF;
				gridCells[row][col].alpha = 0.3;
			}
		}
	}
}
function updateSunDisplay() {
	sunDisplay.setText('Sun: ' + sunPoints);
}
function updateLivesDisplay() {
	livesDisplay.setText('Lives: ' + lives);
}
function updateWaveDisplay() {
	waveDisplay.setText('Wave: ' + currentWave + '/' + totalWaves);
}
function createProjectile(type, startX, startY, speed, damage, plantId) {
	// Check if plant already has 2 active projectiles
	if (!plantProjectileCount[plantId]) {
		plantProjectileCount[plantId] = 0;
	}
	if (plantProjectileCount[plantId] >= 2) {
		return null; // Don't create projectile if plant already has 2
	}
	var projectile;
	if (projectilePool.length > 0) {
		// Reuse from pool
		projectile = projectilePool.pop();
		projectile.speed = speed;
		projectile.damage = damage;
		projectile.x = startX;
		projectile.y = startY;
		projectile.type = type;
		projectile.gridY = Math.floor((startY - gridStartY + cellSize / 2) / cellSize);
		projectile.ownerId = plantId;
		// Re-add graphics
		var graphics = projectile.attachAsset(type, {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else {
		// Create new projectile
		projectile = new Projectile(type, startX, startY, speed, damage);
		projectile.ownerId = plantId;
	}
	plantProjectileCount[plantId]++;
	projectiles.push(projectile);
	game.addChild(projectile);
	return projectile;
}
function performanceCleanup() {
	// Clean up destroyed objects that might still be in arrays
	for (var i = enemies.length - 1; i >= 0; i--) {
		if (!enemies[i].parent) {
			enemies.splice(i, 1);
		}
	}
	for (var i = projectiles.length - 1; i >= 0; i--) {
		if (!projectiles[i].parent) {
			projectiles.splice(i, 1);
		}
	}
	for (var i = suns.length - 1; i >= 0; i--) {
		if (!suns[i].parent) {
			suns.splice(i, 1);
		}
	}
	// Clean up projectile tracking for destroyed plants
	for (var plantId in plantProjectileCount) {
		var coords = plantId.split('_');
		var x = parseInt(coords[0]);
		var y = parseInt(coords[1]);
		if (y >= 0 && y < gridRows && x >= 0 && x < gridCols && !plants[y][x]) {
			delete plantProjectileCount[plantId];
		}
	}
	// Limit maximum objects if we have too many
	if (enemies.length > maxObjectsPerType) {
		for (var i = 0; i < enemies.length - maxObjectsPerType; i++) {
			if (enemies[i]) {
				enemies[i].destroy();
			}
		}
	}
	if (projectiles.length > maxObjectsPerType) {
		for (var i = 0; i < projectiles.length - maxObjectsPerType; i++) {
			if (projectiles[i]) {
				projectiles[i].removeFromGame();
			}
		}
	}
	if (suns.length > 20) {
		for (var i = 0; i < suns.length - 20; i++) {
			if (suns[i]) {
				suns[i].destroy();
			}
		}
	}
	// Limit projectile pool size
	if (projectilePool.length > maxPoolSize) {
		for (var i = maxPoolSize; i < projectilePool.length; i++) {
			if (projectilePool[i]) {
				projectilePool[i].destroy();
			}
		}
		projectilePool.length = maxPoolSize;
	}
}
function getGridPosition(x, y) {
	var gridX = Math.floor((x - gridStartX + cellSize / 2) / cellSize);
	var gridY = Math.floor((y - gridStartY + cellSize / 2) / cellSize);
	if (gridX >= 0 && gridX < gridCols && gridY >= 0 && gridY < gridRows) {
		return {
			x: gridX,
			y: gridY
		};
	}
	return null;
}
function canPlacePlant(gridX, gridY, plantType) {
	// Check if grid position is valid
	if (gridX < 0 || gridX >= gridCols || gridY < 0 || gridY >= gridRows) {
		return false;
	}
	// Check wallnut cooldown
	if (plantType === 'wallnut' && wallnutCooldown > 0) {
		return false;
	}
	// Check if square is empty and player has enough suns
	return plants[gridY][gridX] === null && sunPoints >= plantCosts[plantType];
}
function placePlant(gridX, gridY, plantType) {
	// Double-check that placement is valid before proceeding
	if (!canPlacePlant(gridX, gridY, plantType)) {
		return false;
	}
	var plant;
	switch (plantType) {
		case 'peashooter':
			plant = new Peashooter();
			break;
		case 'sunflower':
			plant = new Sunflower();
			break;
		case 'wallnut':
			plant = new Wallnut();
			break;
		case 'snowpea':
			plant = new SnowPea();
			break;
		case 'repetidora':
			plant = new Repetidora();
			break;
		default:
			return false;
	}
	// Set plant position and grid reference
	plant.gridX = gridX;
	plant.gridY = gridY;
	plant.x = gridStartX + gridX * cellSize;
	plant.y = gridStartY + gridY * cellSize;
	// Place plant in grid and add to game
	plants[gridY][gridX] = plant;
	game.addChild(plant);
	// Deduct cost and update UI
	sunPoints -= plantCosts[plantType];
	updateSunDisplay();
	LK.getSound('plant').play();
	// Start wallnut cooldown if placing wallnut
	if (plantType === 'wallnut') {
		wallnutCooldown = wallnutCooldownTime;
		selectedPlantType = null; // Deselect wallnut after placing
		updatePlantSelection();
	}
	// Flash the grid cell to show successful placement
	LK.effects.flashObject(gridCells[gridY][gridX], 0x00FF00, 300);
	return true;
}
function spawnZombie(type, row) {
	var zombie;
	switch (type) {
		case 'zombie':
			zombie = new Zombie();
			break;
		case 'cone_zombie':
			zombie = new ConeZombie();
			break;
		case 'bucket_zombie':
			zombie = new BucketZombie();
			break;
		case 'sun_zombie':
			zombie = new SunZombie();
			break;
		case 'miner_zombie':
			zombie = new MinerZombie();
			// Special positioning for miner
			zombie.initializeMiner(row);
			enemies.push(zombie);
			game.addChild(zombie);
			return;
		// Return early since positioning is handled
		case 'zombiestein':
			zombie = new Zombiestein();
			break;
		default:
			return;
	}
	zombie.gridY = row;
	zombie.x = 2100;
	zombie.y = gridStartY + row * cellSize;
	enemies.push(zombie);
	game.addChild(zombie);
}
function startWave() {
	if (waveInProgress) {
		return;
	}
	waveInProgress = true;
	waveStartTick = LK.ticks; // Record when wave started
	sunZombieSpawnedThisWave = false; // Reset sun zombie spawn flag for this wave
	// Reset and update miner zombie tracking for this wave
	minerZombiesSpawnedThisWave = 0;
	if (currentWave >= 8) {
		maxMinerZombiesPerWave = 2;
	} else {
		maxMinerZombiesPerWave = 1;
	}
	var bucketZombiesLeft = 0;
	if (currentWave === 1) {
		// Wave 1: 3-4 normal zombies
		var normalCount = Math.floor(Math.random() * 2) + 3;
		for (var i = 0; i < normalCount; i++) {
			var row = Math.floor(Math.random() * gridRows);
			spawnZombie('zombie', row);
		}
		enemiesInWave = normalCount;
	} else if (currentWave === 2) {
		// Wave 2: 3-4 normal zombies, 75% chance for 1 sun zombie, 1 cone zombie
		var normalCount = Math.floor(Math.random() * 2) + 3;
		var sunZombieCount = Math.random() < 0.75 ? 1 : 0;
		var coneCount = 1;
		// Spawn normal zombies
		for (var i = 0; i < normalCount; i++) {
			var row = Math.floor(Math.random() * gridRows);
			spawnZombie('zombie', row);
		}
		// Spawn sun zombie if chance succeeds
		if (sunZombieCount > 0) {
			var row = Math.floor(Math.random() * gridRows);
			spawnZombie('sun_zombie', row);
			sunZombieSpawnedThisWave = true;
		}
		// Spawn cone zombie
		var row = Math.floor(Math.random() * gridRows);
		spawnZombie('cone_zombie', row);
		enemiesInWave = normalCount + sunZombieCount + coneCount;
	} else if (currentWave === 3) {
		bucketZombiesLeft = 1; // Only 1 bucket zombie in wave 3
		enemiesInWave = Math.floor(Math.random() * 2) + 3 + Math.floor(Math.random() * 2) + 1 + bucketZombiesLeft; // normal + cone + bucket
	} else if (currentWave === 4) {
		bucketZombiesLeft = Math.floor(Math.random() * 2) + 2; // 2-3 bucket zombies
		enemiesInWave = Math.floor(Math.random() * 2) + 3 + Math.floor(Math.random() * 2) + 1 + bucketZombiesLeft;
	} else if (currentWave === 5) {
		bucketZombiesLeft = Math.floor(Math.random() * 2) + 3; // 3-4 bucket zombies
		enemiesInWave = Math.floor(Math.random() * 2) + 3 + Math.floor(Math.random() * 2) + 1 + bucketZombiesLeft;
	} else {
		// From wave 6+: spawn 50% fewer zombies but increase cone/bucket probability by 25%
		bucketZombiesLeft = Math.floor((Math.floor(Math.random() * 2) + 4 + (currentWave - 6)) * 0.5); // 50% fewer bucket zombies
		enemiesInWave = Math.floor((5 + currentWave * 2) * 0.5); // 50% fewer total enemies
		// Spawn Zombiestein in wave 10 (only once per game)
		if (currentWave === 10 && !zombiesteinSpawned) {
			var zombiesteinRow = Math.floor(Math.random() * gridRows);
			spawnZombie('zombiestein', zombiesteinRow);
			zombiesteinSpawned = true;
			zombiesteinAlive = true;
			enemiesInWave++; // Add Zombiestein to enemy count
		}
	}
	enemiesKilled = 0;
	// Only set up spawn timer for waves 3 and above (waves 1-2 spawn immediately)
	if (currentWave >= 3) {
		var normalZombiesLeft = Math.floor(Math.random() * 2) + 3;
		var coneZombiesLeft = Math.floor(Math.random() * 2) + 1;
		var spawnTimer = LK.setInterval(function () {
			if (enemiesInWave > 0) {
				var row = Math.floor(Math.random() * gridRows);
				var zombieType;
				// Determine sun zombie probability based on wave
				var sunZombieProbability = 0;
				if (currentWave === 3) sunZombieProbability = 0.50;else if (currentWave === 4) sunZombieProbability = 0.25;
				// Check if we should spawn a sun zombie (only waves 3-4, max 1 per wave)
				var shouldSpawnSunZombie = currentWave >= 3 && currentWave <= 4 && !sunZombieSpawnedThisWave && Math.random() < sunZombieProbability;
				// Check if we should spawn a miner zombie (waves 6+, 100% chance, max per wave limit)
				var shouldSpawnMinerZombie = currentWave >= 6 && minerZombiesSpawnedThisWave < maxMinerZombiesPerWave && Math.random() < 1.0;
				if (shouldSpawnSunZombie) {
					zombieType = 'sun_zombie';
					sunZombieSpawnedThisWave = true; // Mark that sun zombie has been spawned this wave
				} else if (shouldSpawnMinerZombie) {
					zombieType = 'miner_zombie';
					minerZombiesSpawnedThisWave++; // Increment miner count for this wave
				} else if (currentWave >= 3) {
					// From wave 3 onwards, include bucket zombies
					// For wave 6+, increase cone and bucket zombie probability by 25%
					if (normalZombiesLeft > 0 && coneZombiesLeft > 0 && bucketZombiesLeft > 0) {
						var rand = Math.random();
						if (currentWave >= 6) {
							// Wave 6+: 25% normal, 37.5% cone, 37.5% bucket (25% more cone/bucket)
							if (rand < 0.25) {
								zombieType = 'zombie';
								normalZombiesLeft--;
							} else if (rand < 0.625) {
								zombieType = 'cone_zombie';
								coneZombiesLeft--;
							} else {
								zombieType = 'bucket_zombie';
								bucketZombiesLeft--;
							}
						} else {
							// Wave 3-5: original probabilities
							if (rand < 0.4) {
								zombieType = 'zombie';
								normalZombiesLeft--;
							} else if (rand < 0.7) {
								zombieType = 'cone_zombie';
								coneZombiesLeft--;
							} else {
								zombieType = 'bucket_zombie';
								bucketZombiesLeft--;
							}
						}
					} else if (normalZombiesLeft > 0 && coneZombiesLeft > 0) {
						if (currentWave >= 6) {
							// Wave 6+: 35% normal, 65% cone (25% more cone)
							zombieType = Math.random() < 0.35 ? 'zombie' : 'cone_zombie';
						} else {
							// Wave 3-5: original 60/40 split
							zombieType = Math.random() < 0.6 ? 'zombie' : 'cone_zombie';
						}
						if (zombieType === 'zombie') {
							normalZombiesLeft--;
						} else {
							coneZombiesLeft--;
						}
					} else if (normalZombiesLeft > 0 && bucketZombiesLeft > 0) {
						if (currentWave >= 6) {
							// Wave 6+: 35% normal, 65% bucket (25% more bucket)
							zombieType = Math.random() < 0.35 ? 'zombie' : 'bucket_zombie';
						} else {
							// Wave 3-5: original 60/40 split
							zombieType = Math.random() < 0.6 ? 'zombie' : 'bucket_zombie';
						}
						if (zombieType === 'zombie') {
							normalZombiesLeft--;
						} else {
							bucketZombiesLeft--;
						}
					} else if (coneZombiesLeft > 0 && bucketZombiesLeft > 0) {
						zombieType = Math.random() < 0.5 ? 'cone_zombie' : 'bucket_zombie';
						if (zombieType === 'cone_zombie') {
							coneZombiesLeft--;
						} else {
							bucketZombiesLeft--;
						}
					} else if (normalZombiesLeft > 0) {
						zombieType = 'zombie';
						normalZombiesLeft--;
					} else if (coneZombiesLeft > 0) {
						zombieType = 'cone_zombie';
						coneZombiesLeft--;
					} else if (bucketZombiesLeft > 0) {
						zombieType = 'bucket_zombie';
						bucketZombiesLeft--;
					} else {
						zombieType = 'zombie'; // fallback
					}
				} else {
					// Fallback for other waves
					zombieType = Math.random() < 0.5 ? 'zombie' : 'cone_zombie';
				}
				spawnZombie(zombieType, row);
				enemiesInWave--;
			} else {
				LK.clearInterval(spawnTimer);
			}
		}, 1200);
	} // Close the if (currentWave >= 3) block
}
// Mouse move handler to update ghost plant position
game.move = function (x, y, obj) {
	if (ghostPlant && selectedPlantType) {
		var gridPos = getGridPosition(x, y);
		if (gridPos) {
			// Snap to grid position
			ghostPlant.x = gridStartX + gridPos.x * cellSize;
			ghostPlant.y = gridStartY + gridPos.y * cellSize;
			// Change color based on validity
			if (canPlacePlant(gridPos.x, gridPos.y, selectedPlantType)) {
				ghostPlant.tint = 0x88FF88; // Green tint for valid placement
			} else {
				ghostPlant.tint = 0xFF8888; // Red tint for invalid placement
			}
		} else {
			// Follow cursor if outside grid
			ghostPlant.x = x;
			ghostPlant.y = y;
			ghostPlant.tint = 0xFF8888; // Red tint when outside grid
		}
	}
};
// Game input handling
game.down = function (x, y, obj) {
	// Check if clicking on a sun
	for (var i = 0; i < suns.length; i++) {
		if (suns[i].intersects({
			x: x,
			y: y,
			width: 1,
			height: 1
		})) {
			return; // Let sun handle its own click
		}
	}
	// Check if using shovel to remove plant
	if (selectedTool === 'shovel') {
		var gridPos = getGridPosition(x, y);
		if (gridPos && plants[gridPos.y][gridPos.x] !== null) {
			// Remove the plant
			var plant = plants[gridPos.y][gridPos.x];
			plant.destroy();
			plants[gridPos.y][gridPos.x] = null;
			LK.effects.flashObject(gridCells[gridPos.y][gridPos.x], 0xFFFF00, 300);
			updatePlantSelection();
			return;
		} else if (gridPos) {
			// Flash red if trying to remove from empty square
			LK.effects.flashObject(gridCells[gridPos.y][gridPos.x], 0xFF0000, 300);
		} else {
			// Clicking outside grid cancels shovel selection
			selectedTool = null;
			shovelButton.alpha = 0.8;
			shovelButton.scaleX = shovelButton.scaleY = 1.5;
			updatePlantSelection();
		}
	}
	// Check if placing a plant
	else if (selectedPlantType) {
		var gridPos = getGridPosition(x, y);
		if (gridPos) {
			if (canPlacePlant(gridPos.x, gridPos.y, selectedPlantType)) {
				// Successfully place the plant
				if (placePlant(gridPos.x, gridPos.y, selectedPlantType)) {
					selectedPlantType = null;
					updatePlantSelection();
					return;
				}
			} else if (plants[gridPos.y][gridPos.x] !== null) {
				// Flash red if trying to place on occupied square
				LK.effects.flashObject(gridCells[gridPos.y][gridPos.x], 0xFF0000, 300);
			} else if (sunPoints < plantCosts[selectedPlantType]) {
				// Flash yellow if not enough suns
				LK.effects.flashObject(gridCells[gridPos.y][gridPos.x], 0xFFFF00, 300);
			}
		} else {
			// Clicking outside grid cancels selection
			selectedPlantType = null;
			updatePlantSelection();
		}
	}
};
// Initialize UI
updatePlantSelection();
updateSunDisplay();
updateLivesDisplay();
updateWaveDisplay();
// Start first wave after a delay
LK.setTimeout(function () {
	startWave();
}, 10000);
// Main game loop
game.update = function () {
	// Enable lag optimization from wave 8 onwards
	if (currentWave >= 8 && !lagOptimizationActive) {
		lagOptimizationActive = true;
		console.log("Lag optimization activated for wave", currentWave);
	}
	// Performance cleanup every 3 seconds when lag optimization is active
	if (lagOptimizationActive) {
		cleanupCounter++;
		if (cleanupCounter >= 180) {
			// Every 3 seconds at 60fps
			performanceCleanup();
			cleanupCounter = 0;
		}
	}
	// Update wallnut cooldown
	if (wallnutCooldown > 0) {
		wallnutCooldown--;
		if (wallnutCooldown === 0) {
			updatePlantSelection(); // Refresh button appearance when cooldown ends
		}
	}
	// Falling sun system - every 10 seconds (optimized for high waves)
	sunTimer++;
	var sunInterval = lagOptimizationActive ? 1080 : 720; // 18 seconds when optimized, 12 seconds normally
	if (sunTimer >= sunInterval) {
		// Only spawn sun if we don't have too many already
		if (suns.length < (lagOptimizationActive ? 8 : 15)) {
			var fallingSun = new Sun(Math.random() * (gridStartX + gridCols * cellSize - gridStartX) + gridStartX, -50);
			suns.push(fallingSun);
			game.addChild(fallingSun);
			// Animate falling sun
			tween(fallingSun, {
				y: Math.random() * 200 + 300
			}, {
				duration: 2400,
				easing: tween.easeOut
			});
		}
		sunTimer = 0;
	}
	// Check if current wave should end (22 seconds timer-based)
	if (waveInProgress && LK.ticks - waveStartTick >= 1584) {
		// 26.4 seconds at 60fps
		waveInProgress = false;
		wavesCompleted++;
		if (wavesCompleted >= totalWaves) {
			// Check if Zombiestein was spawned and is still alive
			if (zombiesteinSpawned && zombiesteinAlive) {
				// Don't end game until Zombiestein is defeated
				console.log("All waves completed but Zombiestein still alive!");
				return;
			}
			LK.effects.flashScreen(0x4CAF50, 1000);
			LK.showYouWin();
			return;
		}
		currentWave++;
		updateWaveDisplay();
		// Start next wave after delay
		LK.setTimeout(function () {
			startWave();
		}, 3000);
	}
	// Auto-start next wave if no wave in progress and we haven't completed all waves
	if (!waveInProgress && wavesCompleted < totalWaves && !nextWaveScheduled) {
		nextWaveScheduled = true;
		LK.setTimeout(function () {
			nextWaveScheduled = false;
			startWave();
		}, 1000);
	}
};