/****
* Classes
****/
// Create a class for the obstacles
var Obstacle = Container.expand(function () {
  var self = Container.call(this);
  var obstacleGraphics = self.attachAsset('obstacle', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = -3;
  self.update = function () {
    self.y += self.speed;
    if (self.y < -self.height) {
      self.destroy();
    }
  };
});
// The assets will be automatically created and loaded by the LK engine
// Create a class for the player character
var Player = Container.expand(function () {
  var self = Container.call(this);
  var playerGraphics = self.attachAsset('player', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 5;
  self.update = function () {
    // Add code here to update the player's position based on input
  };
});

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

/****
* Game Code
****/
// Initialize player and add to game
var player = game.addChild(new Player());
player.x = game.width / 2;
player.y = game.height - player.height;
// Initialize array to hold obstacles
var obstacles = [];
// Initialize score
var score = 0;
var scoreTxt = new Text2('0', {
  size: 150,
  fill: "#ffffff"
});
LK.gui.top.addChild(scoreTxt);
// Game update function
game.update = function () {
  // Update player
  player.update();
  // Update obstacles
  for (var i = obstacles.length - 1; i >= 0; i--) {
    var obstacle = obstacles[i];
    obstacle.update();
    // Check for collision with player
    if (player.intersects(obstacle)) {
      LK.showGameOver();
    }
    // Remove off-screen obstacles
    if (obstacle.y < -obstacle.height) {
      obstacles.splice(i, 1);
      obstacle.destroy();
      // Increase score when an obstacle is successfully avoided
      score++;
      scoreTxt.setText(score);
    }
  }
  // Add new obstacles
  if (LK.ticks % 120 == 0) {
    // Every 2 seconds
    var obstacle = new Obstacle();
    obstacle.x = Math.random() * (game.width - obstacle.width);
    obstacle.y = game.height;
    obstacles.push(obstacle);
    game.addChild(obstacle);
  }
};
// Handle touch events
game.down = function (x, y, obj) {
  player.x = x;
  player.y = y;
};
game.move = function (x, y, obj) {
  player.x = x;
  player.y = y;
};