/****
* Classes
****/
// Assets will be automatically created and loaded by the LK engine based on their usage in the code.
// Define a Bullet class for player bullets
var Bullet = Container.expand(function () {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('bullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = -10;
  self.update = function () {
    self.y += self.speed;
  };
});
// Define an Enemy class for enemy entities
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.update = function () {
    self.y += self.speed;
  };
});
// Define a Player class for the player character
var Player = Container.expand(function () {
  var self = Container.call(this);
  var playerGraphics = self.attachAsset('player', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.shoot = function () {
    var newBullet = new Bullet();
    newBullet.x = self.x;
    newBullet.y = self.y;
    bullets.push(newBullet);
    game.addChild(newBullet);
  };
});

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

/****
* Game Code
****/
// Initialize player
var player = new Player();
player.x = 2048 / 2;
player.y = 2732 - 150;
game.addChild(player);
// Initialize arrays for bullets and enemies
var bullets = [];
var enemies = [];
// Function to spawn enemies
function spawnEnemy() {
  var enemy = new Enemy();
  enemy.x = Math.random() * 2048;
  enemy.y = -50;
  enemies.push(enemy);
  game.addChild(enemy);
}
// Handle game updates
game.update = function () {
  // Update bullets
  for (var i = bullets.length - 1; i >= 0; i--) {
    bullets[i].update();
    if (bullets[i].y < -50) {
      bullets[i].destroy();
      bullets.splice(i, 1);
    }
  }
  // Update enemies
  for (var j = enemies.length - 1; j >= 0; j--) {
    enemies[j].update();
    if (enemies[j].y > 2732) {
      enemies[j].destroy();
      enemies.splice(j, 1);
    }
  }
  // Check for collisions between bullets and enemies
  for (var k = bullets.length - 1; k >= 0; k--) {
    for (var l = enemies.length - 1; l >= 0; l--) {
      if (bullets[k].intersects(enemies[l])) {
        bullets[k].destroy();
        enemies[l].destroy();
        bullets.splice(k, 1);
        enemies.splice(l, 1);
        break;
      }
    }
  }
  // Spawn new enemies periodically
  if (LK.ticks % 60 == 0) {
    spawnEnemy();
  }
};
// Handle player movement
game.move = function (x, y, obj) {
  player.x = x;
  player.y = y;
};
// Handle shooting
game.down = function (x, y, obj) {
  player.shoot();
};