/****
* Classes
****/
// Bullet class
var Bullet = Container.expand(function () {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('bullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = -15;
  self.update = function () {
    self.y += self.speed;
    if (self.y < 0) {
      self.destroy();
    }
  };
});
// Enemy class
var Enemy = Container.expand(function () {
  var self = Container.call(this);
  var enemyGraphics = self.attachAsset('enemy', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 5;
  self.update = function () {
    self.y += self.speed;
    if (self.y > 2732) {
      self.destroy();
    }
  };
});
//<Assets used in the game will automatically appear here>
// Player class
var Player = Container.expand(function () {
  var self = Container.call(this);
  var playerGraphics = self.attachAsset('player', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 10;
  self.update = function () {
    // Player update logic
  };
  self.move = function (x, y) {
    self.x = x;
    self.y = y;
  };
});

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

/****
* Game Code
****/
var player;
var enemies = [];
var bullets = [];
var score = 0;
var scoreTxt = new Text2('0', {
  size: 150,
  fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
function spawnEnemy() {
  var enemy = new Enemy();
  enemy.x = Math.random() * 2048;
  enemy.y = -50;
  enemies.push(enemy);
  game.addChild(enemy);
}
function shootBullet() {
  var bullet = new Bullet();
  bullet.x = player.x;
  bullet.y = player.y;
  bullets.push(bullet);
  game.addChild(bullet);
}
game.down = function (x, y, obj) {
  player.move(x, y);
};
game.move = function (x, y, obj) {
  player.move(x, y);
};
game.update = function () {
  player.update();
  enemies.forEach(function (enemy) {
    enemy.update();
    if (enemy.intersects(player)) {
      LK.effects.flashScreen(0xff0000, 1000);
      LK.showGameOver();
    }
  });
  bullets.forEach(function (bullet) {
    bullet.update();
    enemies.forEach(function (enemy, index) {
      if (bullet.intersects(enemy)) {
        bullet.destroy();
        enemy.destroy();
        bullets.splice(bullets.indexOf(bullet), 1);
        enemies.splice(index, 1);
        score += 1;
        scoreTxt.setText(score);
      }
    });
  });
  if (LK.ticks % 60 == 0) {
    spawnEnemy();
  }
  if (LK.ticks % 15 == 0) {
    shootBullet();
  }
};
player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2732 - 200;