/****
* Classes
****/
// Assets will be automatically initialized based on usage in the code.
// Hero class
var Hero = Container.expand(function () {
  var self = Container.call(this);
  var heroGraphics = self.attachAsset('hero', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.move = function (x, y) {
    self.x = x;
    self.y = y;
  };
  self.shoot = function () {
    // Shooting logic will be implemented here
  };
});
// Obstacle class
var Obstacle = Container.expand(function () {
  var self = Container.call(this);
  var obstacleGraphics = self.attachAsset('obstacle', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 5;
  self.move = function () {
    self.y += self.speed;
  };
});
// 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.move = function () {
    self.y += self.speed;
  };
});

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

/****
* Game Code
****/
// Initialize important asset arrays
var obstacles = [];
var bullets = [];
var hero;
// Initialize hero
function initHero() {
  hero = game.addChild(new Hero());
  hero.x = game.width / 2;
  hero.y = game.height - 200;
}
// Initialize game
function initGame() {
  initHero();
}
// Game tick logic
function gameTick() {
  // Move obstacles
  for (var i = obstacles.length - 1; i >= 0; i--) {
    obstacles[i].move();
    // Check for collision with hero
    if (obstacles[i].intersects(hero)) {
      // End game logic
      LK.showGameOver();
    }
    // Remove off-screen obstacles
    if (obstacles[i].y > game.height + 50) {
      obstacles[i].destroy();
      obstacles.splice(i, 1);
    }
  }
  // Move bullets
  for (var j = bullets.length - 1; j >= 0; j--) {
    bullets[j].move();
    // Check for collision with obstacles
    for (var k = obstacles.length - 1; k >= 0; k--) {
      if (bullets[j].intersects(obstacles[k])) {
        obstacles[k].destroy();
        obstacles.splice(k, 1);
        bullets[j].destroy();
        bullets.splice(j, 1);
        break;
      }
    }
    // Remove off-screen bullets
    if (bullets[j] && bullets[j].y < -50) {
      bullets[j].destroy();
      bullets.splice(j, 1);
    }
  }
}
// Touch event handlers
function handleTouchStart(obj) {
  var touchPos = obj.event.getLocalPosition(game);
  hero.move(touchPos.x, touchPos.y);
}
function handleTouchMove(obj) {
  var touchPos = obj.event.getLocalPosition(game);
  hero.move(touchPos.x, touchPos.y);
}
// Initialize game elements
initGame();
// Event listeners
game.on('down', handleTouchStart);
game.on('move', handleTouchMove);
// Game tick event
LK.on('tick', gameTick);