/****
* Classes
****/
// The assets will be automatically created and loaded by the LK engine
// Class for the player's bullet
var PlayerBullet = Container.expand(function () {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('playerBullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = -10;
  self.update = function () {
    self.y += self.speed;
    if (self.y < 0) {
      self.destroy();
    }
  };
});
// Class for the target
var Target = Container.expand(function () {
  var self = Container.call(this);
  var targetGraphics = self.attachAsset('target', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 2;
  self.update = function () {
    self.y += self.speed;
    if (self.y > 2732) {
      self.y = 0;
      self.x = Math.random() * 2048;
    }
  };
});

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

/****
* Game Code
****/
// Initialize player's bullet and target arrays
var playerBullets = [];
var targets = [];
// Initialize score and timer
var score = 0;
var timer = 60;
// Create score and timer text
var scoreText = new Text2('Score: 0', {
  size: 50,
  fill: "#ffffff"
});
scoreText.x = 20;
scoreText.y = 20;
game.addChild(scoreText);
var timerText = new Text2('Time: 60', {
  size: 50,
  fill: "#ffffff"
});
timerText.x = 2048 - 20;
timerText.y = 20;
timerText.anchor.set(1, 0);
game.addChild(timerText);
// Create targets
for (var i = 0; i < 10; i++) {
  var target = new Target();
  target.x = Math.random() * 2048;
  target.y = Math.random() * 2732;
  targets.push(target);
  game.addChild(target);
}
// Game update function
game.update = function () {
  // Update score and timer text
  scoreText.setText('Score: ' + score);
  timerText.setText('Time: ' + timer);
  // Check for bullet and target collision
  for (var i = playerBullets.length - 1; i >= 0; i--) {
    for (var j = targets.length - 1; j >= 0; j--) {
      if (playerBullets[i].intersects(targets[j])) {
        playerBullets[i].destroy();
        playerBullets.splice(i, 1);
        targets[j].destroy();
        targets.splice(j, 1);
        score++;
        break;
      }
    }
  }
  // End game when timer reaches 0
  if (timer <= 0) {
    LK.showGameOver();
  }
};
// Game down event function
game.down = function (x, y, obj) {
  var bullet = new PlayerBullet();
  bullet.x = x;
  bullet.y = 2732;
  playerBullets.push(bullet);
  game.addChild(bullet);
};
// Set interval to decrease timer every second
LK.setInterval(function () {
  timer--;
}, 1000);