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

/**** 
* Classes
****/ 
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('attackEffect', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	bulletGraphics.scaleX = 0.5;
	bulletGraphics.scaleY = 0.5;
	self.speed = 15;
	self.targetX = 0;
	self.targetY = 0;
	self.damage = 0;
	self.isPlayerBullet = true;
	self.update = function () {
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < self.speed) {
			// Hit target - check for direct collision with enemies/player
			if (self.isPlayerBullet) {
				// Check collision with all enemies
				for (var i = 0; i < enemies.length; i++) {
					if (!enemies[i].isRespawning && self.intersects(enemies[i])) {
						enemies[i].takeDamage(self.damage);
						self.destroy();
						return;
					}
				}
			} else {
				// Enemy bullet hitting player
				if (!player.isRespawning && self.intersects(player)) {
					player.takeDamage(self.damage);
					self.destroy();
					return;
				}
			}
			// If no collision but reached target, destroy bullet
			self.destroy();
			return;
		}
		// Move towards target
		var moveX = dx / distance * self.speed;
		var moveY = dy / distance * self.speed;
		self.x += moveX;
		self.y += moveY;
		// Remove if out of bounds
		if (self.x < 0 || self.x > 2048 || self.y < 0 || self.y > 2732) {
			self.destroy();
		}
	};
	return self;
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var healthBarBg = self.attachAsset('healthBarBg', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: -60
	});
	var healthBar = self.attachAsset('healthBar', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: -60
	});
	self.maxHealth = 100;
	self.health = 100;
	self.speed = 2;
	self.attackRange = 100;
	self.attackDamage = 20;
	self.attackCooldown = 0;
	self.isRespawning = false;
	self.respawnTimer = 0;
	self.aiTimer = 0;
	self.targetX = 0;
	self.targetY = 0;
	self.takeDamage = function (damage) {
		if (self.isRespawning) return;
		// Each bullet hit reduces health by 25% of max health
		self.health -= self.maxHealth * 0.25;
		if (self.health < 0) self.health = 0;
		self.updateHealthBar();
		// Flash red when taking damage
		tween(enemyGraphics, {
			tint: 0xFF0000
		}, {
			duration: 200,
			onFinish: function onFinish() {
				tween(enemyGraphics, {
					tint: 0xFFFFFF
				}, {
					duration: 200
				});
			}
		});
		if (self.health <= 0) {
			self.die();
		}
		LK.getSound('hit').play();
	};
	self.updateHealthBar = function () {
		var healthPercent = self.health / self.maxHealth;
		healthBar.scaleX = healthPercent;
		if (healthPercent > 0.6) {
			healthBar.tint = 0x00FF00;
		} else if (healthPercent > 0.3) {
			healthBar.tint = 0xFFFF00;
		} else {
			healthBar.tint = 0xFF0000;
		}
	};
	self.die = function () {
		// Random chance for explosion (30% chance)
		var shouldExplode = Math.random() < 0.3;
		if (shouldExplode) {
			// Create explosion effect
			var explosion = LK.getAsset('attackEffect', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			explosion.x = self.x;
			explosion.y = self.y;
			explosion.tint = 0xFF4400;
			explosion.scaleX = 2;
			explosion.scaleY = 2;
			explosion.alpha = 0.8;
			game.addChild(explosion);
			// Animate explosion
			tween(explosion, {
				scaleX: 4,
				scaleY: 4,
				alpha: 0
			}, {
				duration: 500,
				onFinish: function onFinish() {
					explosion.destroy();
				}
			});
			// Check for chain explosions - damage nearby enemies only
			var explosionDamage = 50;
			// Damage nearby enemies
			for (var i = 0; i < enemies.length; i++) {
				var otherEnemy = enemies[i];
				if (otherEnemy !== self && !otherEnemy.isRespawning) {
					var dx = otherEnemy.x - self.x;
					var dy = otherEnemy.y - self.y;
					var distance = Math.sqrt(dx * dx + dy * dy);
					if (distance <= explosionRadius) {
						otherEnemy.takeDamage(explosionDamage, 'explosion');
					}
				}
			}
		}
		self.isRespawning = true;
		self.respawnTimer = 180; // 3 seconds at 60fps
		enemyGraphics.alpha = 0.3;
		healthBar.visible = false;
		healthBarBg.visible = false;
		// Increment killed count and spawn new enemy only if under limit
		enemiesKilled++;
		score++;
		scoreText.setText('Score: ' + score);
		if (enemies.length < maxEnemies) {
			spawnNewEnemy();
		}
	};
	self.respawn = function () {
		self.health = self.maxHealth;
		self.isRespawning = false;
		self.respawnTimer = 0;
		enemyGraphics.alpha = 1;
		healthBar.visible = true;
		healthBarBg.visible = true;
		self.updateHealthBar();
		// Respawn at random position
		self.x = 300 + Math.random() * 1400;
		self.y = 400 + Math.random() * 1800;
		LK.getSound('respawn').play();
	};
	self.attack = function () {
		if (self.attackCooldown > 0 || self.isRespawning) return;
		self.attackCooldown = 90; // 1.5 second cooldown
		if (!player.isRespawning) {
			// Create bullet projectile towards player
			var bullet = game.addChild(new Bullet());
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.targetX = player.x;
			bullet.targetY = player.y;
			bullet.damage = self.attackDamage;
			bullet.isPlayerBullet = false;
			bullets.push(bullet);
		}
		// Create attack effect
		var attackEffect = LK.getAsset('attackEffect', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		attackEffect.x = self.x;
		attackEffect.y = self.y;
		attackEffect.alpha = 0.7;
		attackEffect.tint = 0xFF4444;
		attackEffect.scaleX = 0.8;
		attackEffect.scaleY = 0.8;
		game.addChild(attackEffect);
		// Scale and fade out attack effect
		tween(attackEffect, {
			scaleX: 1.2,
			scaleY: 1.2,
			alpha: 0
		}, {
			duration: 200,
			onFinish: function onFinish() {
				attackEffect.destroy();
			}
		});
		LK.getSound('attack').play();
	};
	self.update = function () {
		if (self.attackCooldown > 0) {
			self.attackCooldown--;
		}
		if (self.isRespawning) {
			self.respawnTimer--;
			if (self.respawnTimer <= 0) {
				self.respawn();
			}
			return;
		}
		// Chase player AI - move towards player and attack when close
		if (!player.isRespawning) {
			var dx = player.x - self.x;
			var dy = player.y - self.y;
			var playerDistance = Math.sqrt(dx * dx + dy * dy);
			// Move towards player with speed multiplier
			var currentSpeed = self.speed * enemySpeedMultiplier;
			if (playerDistance > currentSpeed) {
				var moveX = dx / playerDistance * currentSpeed;
				var moveY = dy / playerDistance * currentSpeed;
				self.x += moveX;
				self.y += moveY;
			}
			// Attack if close enough to player
			if (playerDistance <= self.attackRange) {
				self.attack();
			}
		}
		// Keep enemy in bounds
		if (self.x < 150) self.x = 150;
		if (self.x > 1898) self.x = 1898;
		if (self.y < 150) self.y = 150;
		if (self.y > 2582) self.y = 2582;
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var healthBarBg = self.attachAsset('healthBarBg', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: -60
	});
	var healthBar = self.attachAsset('healthBar', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: -60
	});
	self.maxHealth = 300;
	self.health = 300;
	self.speed = 8;
	self.attackRange = 100;
	self.attackDamage = 25;
	self.attackCooldown = 0;
	self.isRespawning = false;
	self.respawnTimer = 0;
	self.immunityTimer = 0; // Immunity period after respawn
	self.takeDamage = function (damage, source) {
		if (self.isRespawning || self.immunityTimer > 0) return;
		// Prevent damage from explosions and enemy spawning
		if (source === 'explosion' || source === 'spawn') {
			return;
		}
		self.health -= damage;
		if (self.health < 0) self.health = 0;
		self.updateHealthBar();
		// Flash red when taking damage
		tween(playerGraphics, {
			tint: 0xFF0000
		}, {
			duration: 200,
			onFinish: function onFinish() {
				tween(playerGraphics, {
					tint: 0xFFFFFF
				}, {
					duration: 200
				});
			}
		});
		if (self.health <= 0) {
			self.die();
		}
		LK.getSound('hit').play();
	};
	self.updateHealthBar = function () {
		var healthPercent = self.health / self.maxHealth;
		healthBar.scaleX = healthPercent;
		if (healthPercent > 0.6) {
			healthBar.tint = 0x00FF00;
		} else if (healthPercent > 0.3) {
			healthBar.tint = 0xFFFF00;
		} else {
			healthBar.tint = 0xFF0000;
		}
	};
	self.die = function () {
		self.isRespawning = true;
		self.respawnTimer = 180; // 3 seconds at 60fps
		playerGraphics.alpha = 0.3;
		healthBar.visible = false;
		healthBarBg.visible = false;
		// Reset score when player dies
		score = 0;
		scoreText.setText('Score: ' + score);
		// Reset difficulty scaling
		difficultyLevel = 0;
		lastDifficultyScore = 0;
		enemySpeedMultiplier = 1.0; // Reset speed multiplier
	};
	self.respawn = function () {
		self.health = self.maxHealth;
		self.isRespawning = false;
		self.respawnTimer = 0;
		playerGraphics.alpha = 1;
		healthBar.visible = true;
		healthBarBg.visible = true;
		self.updateHealthBar();
		// Respawn at safe position away from enemies
		var safeX, safeY;
		var attempts = 0;
		var maxAttempts = 20;
		var minSafeDistance = 300;
		do {
			safeX = 300 + Math.random() * 1400;
			safeY = 400 + Math.random() * 1800;
			var isSafe = true;
			for (var e = 0; e < enemies.length; e++) {
				if (!enemies[e].isRespawning) {
					var dx = safeX - enemies[e].x;
					var dy = safeY - enemies[e].y;
					var distance = Math.sqrt(dx * dx + dy * dy);
					if (distance < minSafeDistance) {
						isSafe = false;
						break;
					}
				}
			}
			attempts++;
		} while (!isSafe && attempts < maxAttempts);
		self.x = safeX;
		self.y = safeY;
		// Add brief immunity period after respawn
		self.immunityTimer = 120; // 2 seconds of immunity
		LK.getSound('respawn').play();
	};
	self.attack = function () {
		if (self.attackCooldown > 0 || self.isRespawning) return;
		// Fire rate proportional to enemy count - more enemies = faster firing
		var activeEnemies = 0;
		for (var e = 0; e < enemies.length; e++) {
			if (!enemies[e].isRespawning) activeEnemies++;
		}
		var dynamicFireRate = Math.max(15, baseFireRate - activeEnemies * 8); // Faster with more enemies
		self.attackCooldown = dynamicFireRate;
		// Find closest enemy
		var closestEnemy = null;
		var closestDistance = Infinity;
		for (var i = 0; i < enemies.length; i++) {
			if (!enemies[i].isRespawning) {
				var distance = Math.sqrt(Math.pow(enemies[i].x - self.x, 2) + Math.pow(enemies[i].y - self.y, 2));
				if (distance < closestDistance) {
					closestDistance = distance;
					closestEnemy = enemies[i];
				}
			}
		}
		if (closestEnemy) {
			// Create bullet projectile
			var bullet = game.addChild(new Bullet());
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.targetX = closestEnemy.x;
			bullet.targetY = closestEnemy.y;
			bullet.damage = self.attackDamage;
			bullet.isPlayerBullet = true;
			bullets.push(bullet);
			// Create muzzle flash effect
			var attackEffect = LK.getAsset('attackEffect', {
				anchorX: 0.5,
				anchorY: 0.5
			});
			attackEffect.x = self.x;
			attackEffect.y = self.y;
			attackEffect.alpha = 0.7;
			attackEffect.tint = 0x4499FF;
			attackEffect.scaleX = 0.8;
			attackEffect.scaleY = 0.8;
			game.addChild(attackEffect);
			// Scale and fade out attack effect
			tween(attackEffect, {
				scaleX: 1.2,
				scaleY: 1.2,
				alpha: 0
			}, {
				duration: 200,
				onFinish: function onFinish() {
					attackEffect.destroy();
				}
			});
			LK.getSound('attack').play();
		}
	};
	self.update = function () {
		if (self.attackCooldown > 0) {
			self.attackCooldown--;
		}
		if (self.immunityTimer > 0) {
			self.immunityTimer--;
			// Flash during immunity period
			if (self.immunityTimer % 10 < 5) {
				playerGraphics.alpha = 0.5;
			} else {
				playerGraphics.alpha = 1;
			}
		}
		if (self.isRespawning) {
			self.respawnTimer--;
			if (self.respawnTimer <= 0) {
				self.respawn();
			}
			return;
		}
		// Auto-attack enemies regardless of distance
		if (self.attackCooldown <= 0) {
			for (var i = 0; i < enemies.length; i++) {
				var enemy = enemies[i];
				if (!enemy.isRespawning) {
					self.attack();
					break; // Only attack one enemy per frame
				}
			}
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2C3E50
});

/**** 
* Game Code
****/ 
// Create arena background
var arena = game.addChild(LK.getAsset('arena', {
	anchorX: 0.5,
	anchorY: 0.5
}));
arena.x = 2048 / 2;
arena.y = 2732 / 2;
// Game variables
var player;
var enemies = [];
var bullets = [];
var moveUp = false;
var moveDown = false;
var moveLeft = false;
var moveRight = false;
var targetX = 0;
var targetY = 0;
var isMovingToTarget = false;
var enemiesKilled = 0;
var score = 0;
var baseFireRate = 60; // Base attack cooldown
var currentFireRate = 60;
var maxEnemies = 8; // Base maximum number of enemies allowed
var enemySpeedMultiplier = 1.0; // Gradually increases enemy speed
var explosionRadius = 150; // Radius for chain explosions
var difficultyLevel = 0; // Current difficulty level
var lastDifficultyScore = 0; // Score at last difficulty increase
// Create player
player = game.addChild(new Player());
player.x = 500;
player.y = 1000;
// Function to spawn new enemy from random edge
function spawnNewEnemy() {
	var enemy = game.addChild(new Enemy());
	var attempts = 0;
	var maxAttempts = 20;
	var safeDistance = 400; // Increased minimum safe distance from player
	do {
		// Spawn from random edge
		var edge = Math.floor(Math.random() * 4);
		if (edge === 0) {
			// Top edge
			enemy.x = 150 + Math.random() * 1748;
			enemy.y = 150;
		} else if (edge === 1) {
			// Right edge
			enemy.x = 1898;
			enemy.y = 150 + Math.random() * 2432;
		} else if (edge === 2) {
			// Bottom edge
			enemy.x = 150 + Math.random() * 1748;
			enemy.y = 2582;
		} else {
			// Left edge
			enemy.x = 150;
			enemy.y = 150 + Math.random() * 2432;
		}
		// Check distance from player
		var dx = enemy.x - player.x;
		var dy = enemy.y - player.y;
		var distanceFromPlayer = Math.sqrt(dx * dx + dy * dy);
		attempts++;
	} while (distanceFromPlayer < safeDistance && attempts < maxAttempts);
	enemy.targetX = enemy.x;
	enemy.targetY = enemy.y;
	enemies.push(enemy);
}
// Create initial enemies from random edge positions
for (var i = 0; i < 2; i++) {
	spawnNewEnemy();
}
// UI Elements
var instructionText = new Text2('Tap to move - Auto attack enemies nearby', {
	size: 40,
	fill: 0xFFFFFF
});
instructionText.anchor.set(0.5, 0);
LK.gui.top.addChild(instructionText);
instructionText.y = 100;
// Score display
var scoreText = new Text2('Score: 0', {
	size: 50,
	fill: 0xFFD700
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
scoreText.y = 150;
var dragNode = null;
var lastTouchTime = 0;
// Touch controls
game.down = function (x, y, obj) {
	if (player.isRespawning) return;
	// Keep target position in bounds
	targetX = Math.max(150, Math.min(1898, x));
	targetY = Math.max(150, Math.min(2582, y));
	// Stop any current movement tween
	tween.stop(player, {
		x: true,
		y: true
	});
	// Calculate distance for duration (closer = faster)
	var distance = Math.sqrt(Math.pow(targetX - player.x, 2) + Math.pow(targetY - player.y, 2));
	var duration = Math.max(200, Math.min(1000, distance * 2)); // 200ms to 1000ms based on distance
	isMovingToTarget = true;
	// Tween player to target position
	tween(player, {
		x: targetX,
		y: targetY
	}, {
		duration: duration,
		easing: tween.easeOut,
		onFinish: function onFinish() {
			isMovingToTarget = false;
		}
	});
};
game.move = function (x, y, obj) {
	// No drag movement needed - player moves via tween to clicked position
};
game.up = function (x, y, obj) {
	// No action needed - player auto-attacks when moving
};
// Main game loop
game.update = function () {
	// Check for difficulty increase every 25 points
	if (score - lastDifficultyScore >= 25) {
		difficultyLevel++;
		lastDifficultyScore = score;
		// Increase enemy speed more significantly with each difficulty level
		enemySpeedMultiplier += 0.3; // More noticeable speed increase per difficulty level
		// Spawn additional enemies based on difficulty level
		var enemiesToSpawn = Math.min(2, difficultyLevel); // Spawn 1-2 enemies per difficulty increase
		for (var d = 0; d < enemiesToSpawn && enemies.length < maxEnemies + difficultyLevel; d++) {
			spawnNewEnemy();
		}
		// Visual feedback for difficulty increase
		LK.effects.flashScreen(0x00FF00, 500); // Green flash to indicate difficulty increase
	}
	// Gradually increase enemy speed over time (reduced base increase since we have difficulty scaling)
	enemySpeedMultiplier += 0.0002; // Slower base increase, main increases come from difficulty levels
	// Update all game objects
	player.update();
	for (var i = 0; i < enemies.length; i++) {
		enemies[i].update();
	}
	// Update bullets and clean up destroyed ones
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.destroyed) {
			bullets.splice(i, 1);
		} else {
			bullet.update();
		}
	}
};