/****
* Classes
****/
// Bullet class
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;
  };
});
// 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.update = function () {
    self.y += self.speed;
  };
});
//<Assets used in the game will automatically appear here>
// Hero class
var Hero = Container.expand(function () {
  var self = Container.call(this);
  var heroGraphics = self.attachAsset('hero', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 5;
  self.update = function () {
    // Hero update logic
  };
  self.move = function (x, y) {
    self.x = x;
    self.y = y;
  };
});

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

/****
* Game Code
****/
// Initialize variables
var hero;
var enemies = [];
var bullets = [];
var score = 0;
var scoreTxt;
// Initialize hero
hero = game.addChild(new Hero());
hero.x = 2048 / 2;
hero.y = 2732 - 200;
// Initialize score text
scoreTxt = new Text2('0', {
  size: 150,
  fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Handle game move event
game.move = function (x, y, obj) {
  hero.move(x, y);
};
// Handle game update event
game.update = function () {
  // Update hero
  hero.update();
  // Update enemies
  for (var i = enemies.length - 1; i >= 0; i--) {
    enemies[i].update();
    if (enemies[i].y > 2732) {
      enemies[i].destroy();
      enemies.splice(i, 1);
    }
  }
  // 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 = 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);
        score++;
        scoreTxt.setText(score);
        break;
      }
    }
  }
  // Spawn enemies
  if (LK.ticks % 60 == 0) {
    var newEnemy = new Enemy();
    newEnemy.x = Math.random() * 2048;
    newEnemy.y = -50;
    enemies.push(newEnemy);
    game.addChild(newEnemy);
  }
  // Fire bullets
  if (LK.ticks % 15 == 0) {
    var newBullet = new Bullet();
    newBullet.x = hero.x;
    newBullet.y = hero.y;
    bullets.push(newBullet);
    game.addChild(newBullet);
  }
};