/****
* Classes
****/
// Class for obstacles
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.update = function () {
    self.x += self.speed;
    if (self.x < -100) {
      self.destroy();
    }
  };
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// 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.velocityY = 0;
  self.gravity = 0.5;
  self.jumpStrength = -10;
  self.update = function () {
    self.velocityY += self.gravity;
    self.y += self.velocityY;
    // Prevent player from falling below the ground
    if (self.y > 2400) {
      self.y = 2400;
      self.velocityY = 0;
    }
  };
  self.jump = function () {
    self.velocityY = self.jumpStrength;
  };
});
// Class for stars
var Star = Container.expand(function () {
  var self = Container.call(this);
  var starGraphics = self.attachAsset('star', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = -5;
  self.update = function () {
    self.x += self.speed;
    if (self.x < -100) {
      self.destroy();
    }
  };
});

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

/****
* Game Code
****/
// Initialize player
var player = game.addChild(new Player());
player.x = 200;
player.y = 2400;
// Arrays to keep track of obstacles and stars
var obstacles = [];
var stars = [];
// Score display
var score = 0;
var scoreTxt = new Text2('Score: 0', {
  size: 100,
  fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Function to spawn obstacles
function spawnObstacle() {
  var obstacle = new Obstacle();
  obstacle.x = 2200;
  obstacle.y = 2400;
  obstacles.push(obstacle);
  game.addChild(obstacle);
}
// Function to spawn stars
function spawnStar() {
  var star = new Star();
  star.x = 2200;
  star.y = Math.random() * 2000 + 500;
  stars.push(star);
  game.addChild(star);
}
// Handle game updates
game.update = function () {
  player.update();
  // Update obstacles
  for (var i = obstacles.length - 1; i >= 0; i--) {
    var obstacle = obstacles[i];
    obstacle.update();
    if (player.intersects(obstacle)) {
      LK.effects.flashScreen(0xff0000, 1000);
      LK.showGameOver();
    }
  }
  // Update stars
  for (var j = stars.length - 1; j >= 0; j--) {
    var star = stars[j];
    star.update();
    if (player.intersects(star)) {
      score += 10;
      scoreTxt.setText('Score: ' + score);
      star.destroy();
      stars.splice(j, 1);
    }
  }
  // Spawn new obstacles and stars
  if (LK.ticks % 120 == 0) {
    spawnObstacle();
  }
  if (LK.ticks % 180 == 0) {
    spawnStar();
  }
};
// Handle player jump on tap
game.down = function (x, y, obj) {
  player.jump();
};