/**** 
* Classes
****/
// BulletPack class
var BulletPack = Container.expand(function () {
	var self = Container.call(this);
	var bulletPackGraphics = self.createAsset('bulletPack', 'Bullet Pack', 0.5, 0.5);
	self.speed = 4;
	self.direction = Math.random() < 0.5 ? -1 : 1;
	self.move = function () {
		self.y += self.speed;
		self.x += self.direction * 10;
		if (self.x < 0 || self.x > game.width) {
			self.direction *= -1;
		}
	};
});
// Character class
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.createAsset('hero', 'Hero', 0.5, 0.5);
	self.bulletLimit = 3; // Initialize bullet limit
	self.update = function () {
		// Hero update logic
	};
	self.on('down', function (obj) {
		self.shoot();
	});
	self.shoot = function () {
		if (this.bulletLimit > 0) {
			var bullet = new Bullet();
			bullet.x = this.x;
			bullet.y = this.y - this.height / 2;
			heroBullets.push(bullet);
			game.addChild(bullet);
			this.bulletLimit--;
			bulletCountTxt.setText('Bullets: ' + this.bulletLimit); // Update bullet count display
		}
	};
});
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.createAsset('purpleBullet', 'Purple Bullet', 0.0625, 0.0625);
	self.speed = -10;
	self.move = function () {
		self.y += self.speed;
	};
});
// Enemy class
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.createAsset('enemy', 'Enemy character', 0.5, 0.5);
	self.speed = 4;
	self.direction = Math.random() < 0.5 ? -1 : 1;
	self.move = function () {
		self.y += self.speed;
		var randomFactor = Math.random() * (0.1 + LK.ticks * 0.0001); // Random factor increases over time
		self.x += self.direction * (4 + randomFactor);
		if (self.x < 0 || self.x > game.width) {
			self.direction *= -1;
		}
		self.speed += 0.02 + LK.ticks * 0.0001; // Increase speed over time with an accelerating factor
	};
});
var Button = Container.expand(function (text, positionX, positionY, onClickCallback) {
	var self = Container.call(this);
	var buttonText = new Text2(text, {
		size: 200,
		fill: "#ffffff"
	});
	buttonText.anchor.set(0.5);
	self.addChild(buttonText);
	self.x = positionX;
	self.y = positionY;
	self.interactive = true;
	self.on('down', function (obj) {
		var event = obj.event;
		var pos = event.getLocalPosition(game);
		if (self.containsPoint(pos)) {
			onClickCallback();
		}
	});
});
// JoystickAsset class
var JoystickAsset = Container.expand(function () {
	var self = Container.call(this);
	self.interactive = true;
	var stickOrigin = {
		x: stickGraphics.x,
		y: stickGraphics.y
	};
	self.isDragging = false;
	self.onMoveCallback = null;
	self.setMoveCallback = function (callback) {
		self.onMoveCallback = callback;
	};
	self.on('down', function (obj) {
		self.isDragging = true;
	});
	self.on('up', function (obj) {
		self.isDragging = false;
		stickGraphics.x = stickOrigin.x;
		stickGraphics.y = stickOrigin.y;
		if (self.onMoveCallback) {
			self.onMoveCallback({
				x: 0,
				y: 0
			});
		}
	});
	self.on('move', function (obj) {
		if (self.isDragging) {
			var event = obj.event;
			var pos = event.getLocalPosition(self);
			var dx = pos.x - stickOrigin.x;
			var maxDistance = baseGraphics.width * 0.5;
			if (Math.abs(dx) > maxDistance) {
				dx = maxDistance * (dx > 0 ? 1 : -1);
			}
			stickGraphics.x = stickOrigin.x + dx;
			stickGraphics.y = stickOrigin.y;
			if (self.onMoveCallback) {
				self.onMoveCallback({
					x: dx / maxDistance,
					y: 0
				});
			}
		}
	});
	self.containsPoint = function (point) {
		return point.x >= self.x - self.width / 2 && point.x <= self.x + self.width / 2 && point.y >= self.y - self.height / 2 && point.y <= self.y + self.height / 2;
	};
});

/**** 
* Initialize Game
****/
// Create left movement button
var game = new LK.Game({
	backgroundColor: 0x000000 // Init game with black background
});

/**** 
* Game Code
****/
// Initialize important asset arrays
var heroBullets = [];
var enemies = [];
// Create character
var hero = game.addChild(new Hero());
hero.x = game.width / 2;
hero.y = game.height - 100;
// Create score display
var scoreTxt = new Text2('Score: 0', {
	size: 50,
	fill: "#ffffff"
});
scoreTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(scoreTxt);
// Create bullet count display
var bulletCountTxt = new Text2('Bullets: 3', {
	size: 100,
	fill: "#ffffff"
});
bulletCountTxt.anchor.set(0, 0);
bulletCountTxt.y = scoreTxt.height + 50; // Position below the score display
LK.gui.topLeft.addChild(bulletCountTxt);
// Create instructions display
var instructionsTxt = new Text2('Use joystick to move. Tap anywhere to shoot', {
	size: 50,
	fill: "#ffffff"
});
instructionsTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(instructionsTxt);
// Create joystick instance
var joystick = new JoystickAsset();
joystick.x = joystick.width / 2 + 150;
joystick.y = game.height - joystick.height / 2 - 150;
joystick.setMoveCallback(function (direction) {
	hero.x = Math.max(hero.width / 2, Math.min(game.width - hero.width / 2, hero.x + direction.x * 10));
	hero.y = Math.max(hero.height / 2, Math.min(game.height - hero.height / 2, hero.y + direction.y * 10));
});
game.addChild(joystick);
// Handle hero dragging
var dragNode = null;
// Global event listener for shooting bullets
game.on('down', function (obj) {
	var event = obj.event;
	var pos = event.getLocalPosition(game);
	if (!joystick.containsPoint(pos)) {
		hero.shoot();
	}
});
// Global event listener for shooting bullets
// Game tick event
LK.on('tick', function () {
	// Update character
	hero.update();
	// Move and check bullets
	for (var i = heroBullets.length - 1; i >= 0; i--) {
		var bullet = heroBullets[i];
		bullet.move();
		// Check for bullet collision with enemies and bullet packs
		for (var j = enemies.length - 1; j >= 0; j--) {
			if (bullet.intersects(enemies[j])) {
				if (enemies[j] instanceof BulletPack) {
					// If the enemy is a bullet pack
					// Increment character's bullet limit by 5
					hero.bulletLimit += 5;
				} else {
					// If the enemy is an actual enemy
					// Update score
					LK.setScore(LK.getScore() + 1);
					scoreTxt.setText(LK.getScore());
					// Increment character's bullet limit
					hero.bulletLimit++;
				}
				bulletCountTxt.setText('Bullets: ' + hero.bulletLimit); // Update bullet count display
				// Destroy enemy/bullet pack and bullet
				enemies[j].destroy();
				enemies.splice(j, 1);
				bullet.destroy();
				heroBullets.splice(i, 1);
				break;
			}
		}
		// Remove off-screen bullets and end the game if it's the last one
		if (bullet.y < -50) {
			bullet.destroy();
			heroBullets.splice(i, 1);
			if (heroBullets.length === 0 && hero.bulletLimit === 0) {
				LK.showGameOver(); // End the game when the last bullet is out of frame
			}
		}
	}
	// Move enemies
	for (var k = enemies.length - 1; k >= 0; k--) {
		enemies[k].move();
	}
	var enemySpawnRate = 60; // Initialize enemy spawn rate
	// Spawn enemies and bullet packs
	if (LK.ticks % enemySpawnRate == 0) {
		var enemy = new Enemy();
		enemy.x = Math.random() * (game.width - enemy.width) + enemy.width / 2;
		enemy.y = -enemy.height;
		enemies.push(enemy);
		game.addChild(enemy);
		if (enemySpawnRate > 30) {
			enemySpawnRate -= 0.5;
		} // Decrease spawn rate over time to a minimum of 30 ticks
	}
	if (LK.ticks % 600 == 0) {
		// Spawn a bullet pack every 600 ticks
		var bulletPack = new BulletPack();
		bulletPack.x = Math.random() * (game.width - bulletPack.width) + bulletPack.width / 2;
		bulletPack.y = -bulletPack.height;
		enemies.push(bulletPack); // Add bullet pack to enemies array for collision detection
		game.addChild(bulletPack);
	}
});