/****
* Classes
****/
// Obstacle class
var Obstacle = Container.expand(function () {
  var self = Container.call(this);
  var obstacleGraphics = self.attachAsset('obstacle', {
    anchorX: 0.5,
    anchorY: 1.0
  });
  self.speed = -5;
  self.move = function () {
    self.x += self.speed;
  };
});
// Assets will be automatically created based on usage in the code.
// Pony class
var Pony = Container.expand(function () {
  var self = Container.call(this);
  var ponyGraphics = self.attachAsset('pony', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.jumpSpeed = -15;
  self.gravity = 0.5;
  self.velocity = 0;
  self.isJumping = false;
  self.jump = function () {
    if (!self.isJumping) {
      self.velocity = self.jumpSpeed;
      self.isJumping = true;
    }
  };
  self.update = function () {
    self.y += self.velocity;
    self.velocity += self.gravity;
    if (self.y > game.floorLevel) {
      self.y = game.floorLevel;
      self.isJumping = false;
    }
  };
});

/****
* Initialize Game
****/
var game = new LK.Game({
  backgroundColor: 0x87CEEB // Light blue background
});

/****
* Game Code
****/
// Game variables
game.floorLevel = 2732 - 200; // Floor level where the pony runs
game.obstacles = [];
game.score = 0;
game.pony = game.addChild(new Pony());
game.pony.x = 400;
game.pony.y = game.floorLevel;
// Score display
var scoreTxt = new Text2('0', {
  size: 150,
  fill: "#ffffff"
});
LK.gui.top.addChild(scoreTxt);
// Game tick event
LK.on('tick', function () {
  game.pony.update();
  // Move and check obstacles
  for (var i = game.obstacles.length - 1; i >= 0; i--) {
    game.obstacles[i].move();
    if (game.obstacles[i].x < -100) {
      // Off-screen
      game.obstacles[i].destroy();
      game.obstacles.splice(i, 1);
    } else if (game.pony.intersects(game.obstacles[i])) {
      LK.effects.flashScreen(0xff0000, 1000);
      LK.showGameOver();
    }
  }
  // Increase score over time
  if (LK.ticks % 60 == 0) {
    // Every second
    game.score += 1;
    scoreTxt.setText(game.score.toString());
  }
  // Add obstacles
  if (LK.ticks % 300 == 0) {
    // Every 5 seconds
    var newObstacle = new Obstacle();
    newObstacle.x = 2048;
    newObstacle.y = game.floorLevel;
    game.obstacles.push(newObstacle);
    game.addChild(newObstacle);
  }
});
// Touch event to make the pony jump
game.on('down', function (obj) {
  game.pony.jump();
});