/****
* 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 = 3;
  self.update = function () {
    self.y += self.speed;
  };
});
//<Assets used in the game will automatically appear here>
// Fairy class
var Fairy = Container.expand(function () {
  var self = Container.call(this);
  var fairyGraphics = self.attachAsset('fairy', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 5;
  self.update = function () {
    // Fairy movement logic
  };
});

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

/****
* Game Code
****/
// Initialize variables
var fairy;
var bullets = [];
var enemies = [];
var scoreTxt;
var score = 0;
var dragNode = null;
// Initialize game elements
function initGame() {
  // Create and position the fairy
  fairy = game.addChild(new Fairy());
  fairy.x = 2048 / 2;
  fairy.y = 2732 - 200;
  // Create score text
  scoreTxt = new Text2('0', {
    size: 150,
    fill: "#ffffff"
  });
  scoreTxt.anchor.set(0.5, 0);
  LK.gui.top.addChild(scoreTxt);
  // Set up game event listeners
  game.down = function (x, y, obj) {
    dragNode = fairy;
    handleMove(x, y, obj);
  };
  game.up = function (x, y, obj) {
    dragNode = null;
  };
  game.move = handleMove;
  // Update game every tick
  game.update = updateGame;
}
// Handle move events
function handleMove(x, y, obj) {
  if (dragNode) {
    dragNode.x = x;
    dragNode.y = y;
  }
}
// Update game logic
function updateGame() {
  // Update bullets
  for (var i = bullets.length - 1; i >= 0; i--) {
    bullets[i].update();
    if (bullets[i].y < -50) {
      bullets[i].destroy();
      bullets.splice(i, 1);
    }
  }
  // Update enemies
  for (var j = enemies.length - 1; j >= 0; j--) {
    enemies[j].update();
    if (enemies[j].y > 2732 + 50) {
      enemies[j].destroy();
      enemies.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 new bullets
  if (LK.ticks % 20 == 0) {
    var newBullet = new Bullet();
    newBullet.x = fairy.x;
    newBullet.y = fairy.y;
    bullets.push(newBullet);
    game.addChild(newBullet);
  }
  // Spawn new enemies
  if (LK.ticks % 60 == 0) {
    var newEnemy = new Enemy();
    newEnemy.x = Math.random() * 2048;
    newEnemy.y = -50;
    enemies.push(newEnemy);
    game.addChild(newEnemy);
  }
}
// Initialize the game
initGame();