/****
* Classes
****/
// Define a class for 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 a class for enemies
var Enemy = Container.expand(function () {
  var self = Container.call(this);
  var enemyGraphics = self.attachAsset('enemy', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 3;
  self.update = function () {
    self.y += self.speed;
    if (self.y > 2732) {
      self.y = 0;
      self.x = Math.random() * 2048;
    }
  };
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Define a 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.speed = 5;
  self.update = function () {
    // Update logic for player
  };
});

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

/****
* Game Code
****/
// Initialize player
var player = new Player();
player.x = 1024;
player.y = 2500;
game.addChild(player);
// Initialize enemies
var enemies = [];
for (var i = 0; i < 5; i++) {
  var enemy = new Enemy();
  enemy.x = Math.random() * 2048;
  enemy.y = Math.random() * 1000;
  enemies.push(enemy);
  game.addChild(enemy);
}
// Initialize bullets
var bullets = [];
// Handle player movement
game.down = function (x, y, obj) {
  player.x = x;
  player.y = y;
};
// Handle shooting
game.up = function (x, y, obj) {
  var bullet = new Bullet();
  bullet.x = player.x;
  bullet.y = player.y;
  bullets.push(bullet);
  game.addChild(bullet);
};
// Update game state
game.update = function () {
  // Update player
  player.update();
  // Update enemies
  for (var i = 0; i < enemies.length; i++) {
    enemies[i].update();
  }
  // Update bullets
  for (var j = bullets.length - 1; j >= 0; j--) {
    bullets[j].update();
    if (bullets[j].y < 0) {
      bullets[j].destroy();
      bullets.splice(j, 1);
    }
  }
  // Check for collisions
  for (var k = enemies.length - 1; k >= 0; k--) {
    for (var l = bullets.length - 1; l >= 0; l--) {
      if (enemies[k].intersects(bullets[l])) {
        enemies[k].destroy();
        bullets[l].destroy();
        enemies.splice(k, 1);
        bullets.splice(l, 1);
        break;
      }
    }
  }
};