/****
* Classes
****/
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;
  };
});
var Player = Container.expand(function () {
  var self = Container.call(this);
  var ship = self.attachAsset('playerShip', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.move = function (x, y) {
    self.x = x;
    self.y = y;
  };
});
var Star = Container.expand(function () {
  var self = Container.call(this);
  var starGraphics = self.attachAsset('star', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 2;
  self.move = function () {
    self.y += self.speed;
  };
});

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

/****
* Game Code
****/
// Initialize player ship asset
// Initialize obstacle asset
// Initialize background stars
var player = game.addChild(new Player());
player.x = 1024; // Center horizontally
player.y = 2400; // Position towards the bottom
var obstacles = [];
var stars = [];
// Generate initial stars for the background
for (var i = 0; i < 100; i++) {
  var star = new Star();
  star.x = Math.random() * 2048;
  star.y = Math.random() * 2732;
  stars.push(star);
  game.addChild(star);
}
// Handle touch move to control player
game.on('move', function (obj) {
  var pos = obj.event.getLocalPosition(game);
  player.move(pos.x, pos.y);
});
LK.on('tick', function () {
  // Move obstacles
  for (var i = obstacles.length - 1; i >= 0; i--) {
    obstacles[i].move();
    // Remove off-screen obstacles
    if (obstacles[i].y > 2732 + 25) {
      obstacles[i].destroy();
      obstacles.splice(i, 1);
    }
    // Check collision with player
    if (player.intersects(obstacles[i])) {
      LK.effects.flashScreen(0xff0000, 1000);
      LK.showGameOver();
    }
  }
  // Move stars
  for (var j = stars.length - 1; j >= 0; j--) {
    stars[j].move();
    // Reset star position if it moves off-screen
    if (stars[j].y > 2732) {
      stars[j].y = 0;
      stars[j].x = Math.random() * 2048;
    }
  }
  // Add new obstacle every 60 frames (1 second)
  if (LK.ticks % 60 == 0) {
    var newObstacle = new Obstacle();
    newObstacle.x = Math.random() * 2048;
    newObstacle.y = -50; // Start just above the screen
    obstacles.push(newObstacle);
    game.addChild(newObstacle);
  }
});