/****
* Classes
****/
// Define the Player class
var Player = Container.expand(function () {
  var self = Container.call(this);
  var playerGraphics = self.createAsset('player', 'Player character', 0.5, 1);
  self.speed = 5;
  self.jumpPower = -15;
  self.gravity = 0.5;
  self.velocityY = 0;
  self.isJumping = false;
  self.isFlipping = false;
  self.flipRotation = 0;
  self.moveRight = function () {
    self.x += self.speed;
  };
  self.jump = function () {
    if (!self.isJumping) {
      self.isJumping = true;
      self.velocityY = self.jumpPower;
    }
  };
  self.update = function () {
    self.y += self.velocityY;
    self.velocityY += self.gravity;
    if (self.isFlipping) {
      playerGraphics.rotation += self.flipRotation;
    }
    // Check for ground collision
    if (self.y > game.height - playerGraphics.height) {
      self.y = game.height - playerGraphics.height;
      self.isJumping = false;
      self.isFlipping = false;
      playerGraphics.rotation = 0;
    }
  };
  self.flip = function () {
    if (!self.isFlipping && self.isJumping) {
      self.isFlipping = true;
      self.flipRotation = Math.PI / 16; // 22.5 degrees per frame
    }
  };
});
// Define the Obstacle class
var Obstacle = Container.expand(function () {
  var self = Container.call(this);
  var obstacleGraphics = self.createAsset('obstacle', 'Obstacle', 0.5, 1);
  self.speed = -5;
  self.move = function () {
    self.x += self.speed;
  };
  self.update = function () {
    self.move();
  };
});

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

/****
* Game Code
****/
// Initialize important asset arrays
var obstacles = [];
var player = game.addChild(new Player());
// Set the player's starting position
player.x = 2048 / 4;
player.y = game.height - player.height;
// Game tick event
LK.on('tick', function () {
  // Update player
  player.update();
  // Update obstacles
  for (var i = obstacles.length - 1; i >= 0; i--) {
    obstacles[i].update();
    // Check for collision with player
    if (player.intersects(obstacles[i])) {
      // End game if collision occurs
      LK.showGameOver();
    }
    // Remove off-screen obstacles
    if (obstacles[i].x + obstacles[i].width < 0) {
      obstacles[i].destroy();
      obstacles.splice(i, 1);
    }
  }
  // Spawn obstacles
  if (LK.ticks % 120 === 0) {
    // Every 2 seconds
    var obstacle = new Obstacle();
    obstacle.x = game.width;
    obstacle.y = game.height - obstacle.height;
    obstacles.push(obstacle);
    game.addChild(obstacle);
  }
});
// Touch event listeners
game.on('down', function (obj) {
  var touchPos = obj.event.getLocalPosition(game);
  if (touchPos.x > game.width / 2) {
    player.moveRight();
  } else {
    player.jump();
  }
});
game.on('up', function (obj) {
  player.flip();
});