/****
* Classes
****/
// Enemy class
var Enemy = Container.expand(function () {
  var self = Container.call(this);
  var enemyGraphics = self.attachAsset('enemy', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 2;
  self.move = function () {
    self.y += self.speed;
  };
});
// Hero class
var Hero = Container.expand(function () {
  var self = Container.call(this);
  var heroGraphics = self.attachAsset('hero', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.move = function (x, y) {
    self.x = x;
    self.y = y;
  };
});
// HeroBullet class
var HeroBullet = Container.expand(function () {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('heroBullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = -10;
  self.move = function () {
    self.y += self.speed;
  };
});

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

/****
* Game Code
****/
// Initialize assets for the game
var hero = game.addChild(new Hero());
hero.x = 1024; // Center horizontally
hero.y = 2500; // Position towards the bottom
var heroBullets = [];
var enemies = [];
// Function to spawn enemies
function spawnEnemy() {
  var enemy = new Enemy();
  enemy.x = Math.random() * 2048; // Random horizontal position
  enemy.y = 0; // Start from the top
  enemies.push(enemy);
  game.addChild(enemy);
}
// Function to fire a bullet
function fireBullet() {
  var bullet = new HeroBullet();
  bullet.x = hero.x;
  bullet.y = hero.y;
  heroBullets.push(bullet);
  game.addChild(bullet);
}
// Touch event to move hero and fire bullets
game.on('down', function (obj) {
  var pos = obj.event.getLocalPosition(game);
  hero.move(pos.x, pos.y);
  fireBullet();
});
// Game tick event
LK.on('tick', function () {
  // Move bullets
  for (var i = heroBullets.length - 1; i >= 0; i--) {
    heroBullets[i].move();
    if (heroBullets[i].y < 0) {
      heroBullets[i].destroy();
      heroBullets.splice(i, 1);
    }
  }
  // Move enemies
  for (var j = enemies.length - 1; j >= 0; j--) {
    enemies[j].move();
    if (enemies[j].y > 2732) {
      enemies[j].destroy();
      enemies.splice(j, 1);
    }
  }
  // Collision detection
  enemies.forEach(function (enemy, index) {
    if (hero.intersects(enemy)) {
      LK.effects.flashScreen(0xff0000, 1000);
      LK.showGameOver();
    }
    heroBullets.forEach(function (bullet, bulletIndex) {
      if (bullet.intersects(enemy)) {
        enemy.destroy();
        enemies.splice(index, 1);
        bullet.destroy();
        heroBullets.splice(bulletIndex, 1);
        LK.setScore(LK.getScore() + 1);
      }
    });
  });
  // Spawn enemies periodically
  if (LK.ticks % 120 == 0) {
    spawnEnemy();
  }
});