/****
* Classes
****/
// Bullet class
var Bullet = Container.expand(function (x, y) {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('bullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.x = x;
  self.y = y;
  self.speed = -15;
  self.update = function () {
    self.y += self.speed;
    if (self.y < -bulletGraphics.height) {
      self.destroy();
    }
  };
});
// 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 = 5;
  self.update = function () {
    self.y += self.speed;
    if (self.y > 2732 + enemyGraphics.height) {
      self.destroy();
    }
  };
});
//<Assets used in the game will automatically appear here>
// Player class
var Player = Container.expand(function () {
  var self = Container.call(this);
  var playerGraphics = self.attachAsset('player', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 10;
  self.update = function () {
    // Player update logic
  };
  self.shoot = function () {
    var bullet = new Bullet(self.x, self.y - playerGraphics.height / 2);
    bullets.push(bullet);
    game.addChild(bullet);
  };
});

/****
* 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 - 200;
game.addChild(player);
// Initialize bullets array
var bullets = [];
// Initialize enemies array
var enemies = [];
// Spawn enemies at intervals
var enemySpawnInterval = LK.setInterval(function () {
  var enemy = new Enemy();
  enemy.x = Math.random() * 2048;
  enemy.y = -enemy.height;
  enemies.push(enemy);
  game.addChild(enemy);
}, 1000);
// Handle player movement
game.move = function (x, y, obj) {
  player.x = x;
  player.y = y;
};
// Handle player shooting
game.down = function (x, y, obj) {
  player.shoot();
};
// Update game state
game.update = function () {
  // Update player
  player.update();
  // Update bullets
  for (var i = bullets.length - 1; i >= 0; i--) {
    bullets[i].update();
    if (bullets[i].destroyed) {
      bullets.splice(i, 1);
    }
  }
  // Update enemies
  for (var j = enemies.length - 1; j >= 0; j--) {
    enemies[j].update();
    if (enemies[j].destroyed) {
      enemies.splice(j, 1);
    }
  }
  // Check for collisions
  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;
      }
    }
  }
};