/****
* Classes
****/
// Asteroid class
var Asteroid = Container.expand(function () {
  var self = Container.call(this);
  var asteroidGraphics = self.attachAsset('asteroid', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 5;
  self.update = function () {
    self.y += self.speed;
    if (self.y > 2732 + asteroidGraphics.height) {
      self.destroy();
      asteroids.splice(asteroids.indexOf(self), 1);
    }
  };
});
// Hero Bullet class
var HeroBullet = Container.expand(function () {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('heroBullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = -15;
  self.update = function () {
    self.y += self.speed;
    if (self.y < -bulletGraphics.height) {
      self.destroy();
      heroBullets.splice(heroBullets.indexOf(self), 1);
    }
  };
});
//<Assets used in the game will automatically appear here>
// Space Shuttle class
var SpaceShuttle = Container.expand(function () {
  var self = Container.call(this);
  var shuttleGraphics = self.attachAsset('shuttle', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 10;
  self.update = function () {
    // Update logic for the space shuttle
  };
  self.shoot = function () {
    var bullet = new HeroBullet();
    bullet.x = self.x;
    bullet.y = self.y - shuttleGraphics.height / 2;
    game.addChild(bullet);
    heroBullets.push(bullet);
  };
});

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

/****
* Game Code
****/
// Initialize arrays and variables
var heroBullets = [];
var asteroids = [];
var score = 0;
var scoreTxt = new Text2('0', {
  size: 150,
  fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Create space shuttle
var spaceShuttle = new SpaceShuttle();
spaceShuttle.x = 2048 / 2;
spaceShuttle.y = 2732 - 200;
game.addChild(spaceShuttle);
// Handle touch events for shooting
game.down = function (x, y, obj) {
  spaceShuttle.shoot();
};
// Update game logic
game.update = function () {
  // Update space shuttle
  spaceShuttle.update();
  // Update hero bullets
  for (var i = heroBullets.length - 1; i >= 0; i--) {
    heroBullets[i].update();
  }
  // Update asteroids
  for (var j = asteroids.length - 1; j >= 0; j--) {
    asteroids[j].update();
  }
  // Check for collisions
  for (var k = heroBullets.length - 1; k >= 0; k--) {
    for (var l = asteroids.length - 1; l >= 0; l--) {
      if (heroBullets[k].intersects(asteroids[l])) {
        heroBullets[k].destroy();
        asteroids[l].destroy();
        heroBullets.splice(k, 1);
        asteroids.splice(l, 1);
        score++;
        scoreTxt.setText(score);
        break;
      }
    }
  }
  // Spawn new asteroids
  if (LK.ticks % 60 == 0) {
    var asteroid = new Asteroid();
    asteroid.x = Math.random() * 2048;
    asteroid.y = -asteroid.height;
    game.addChild(asteroid);
    asteroids.push(asteroid);
  }
};