/****
* Classes
****/
// HeroBullet 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>
// Jet class
var Jet = Container.expand(function () {
  var self = Container.call(this);
  var jetGraphics = self.attachAsset('jet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 10;
  self.update = function () {
    // Jet update logic
  };
  self.shoot = function () {
    var bullet = new HeroBullet();
    bullet.x = self.x;
    bullet.y = self.y - jetGraphics.height / 2;
    game.addChild(bullet);
    heroBullets.push(bullet);
  };
});
// UFO class
var UFO = Container.expand(function () {
  var self = Container.call(this);
  var ufoGraphics = self.attachAsset('ufo', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 5;
  self.update = function () {
    self.y += self.speed;
    if (self.y > 2732 + ufoGraphics.height) {
      self.destroy();
      ufos.splice(ufos.indexOf(self), 1);
    }
  };
});

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

/****
* Game Code
****/
var jet;
var heroBullets = [];
var ufos = [];
var score = 0;
var scoreTxt = new Text2('0', {
  size: 150,
  fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
function spawnUFO() {
  var ufo = new UFO();
  ufo.x = Math.random() * 2048;
  ufo.y = -ufo.height;
  game.addChild(ufo);
  ufos.push(ufo);
}
game.update = function () {
  jet.update();
  heroBullets.forEach(function (bullet) {
    bullet.update();
  });
  ufos.forEach(function (ufo) {
    ufo.update();
  });
  // Check for collisions
  for (var i = heroBullets.length - 1; i >= 0; i--) {
    for (var j = ufos.length - 1; j >= 0; j--) {
      if (heroBullets[i].intersects(ufos[j])) {
        heroBullets[i].destroy();
        heroBullets.splice(i, 1);
        ufos[j].destroy();
        ufos.splice(j, 1);
        score += 10;
        scoreTxt.setText(score);
        break;
      }
    }
  }
  // Spawn UFOs periodically
  if (LK.ticks % 60 == 0) {
    spawnUFO();
  }
};
game.down = function (x, y, obj) {
  jet.shoot();
};
jet = game.addChild(new Jet());
jet.x = 2048 / 2;
jet.y = 2732 - 200;