/****
* Classes
****/
var Hero = Container.expand(function () {
  var self = Container.call(this);
  var heroGraphics = self.attachAsset('hero', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.move = function (x, y) {
    self.x = x;
    self.y = y;
  };
  self.shoot = function () {
    var bullet = new HeroBullet();
    bullet.x = self.x;
    bullet.y = self.y - self.height / 2;
    game.addChild(bullet);
    return bullet;
  };
});
var Enemy = Container.expand(function () {
  var self = Container.call(this);
  var enemyGraphics = self.attachAsset('enemy', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 2;
  self.move = function () {
    self.y += self.speed;
  };
});
var HeroBullet = Container.expand(function () {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('heroBullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = -5;
  self.move = function () {
    self.y += self.speed;
  };
});
var EnemyBullet = Container.expand(function () {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('enemyBullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 5;
  self.move = function () {
    self.y += self.speed;
  };
});

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

/****
* Game Code
****/
var hero = game.addChild(new Hero());
hero.x = 2048 / 2;
hero.y = 2732 - 100;
var enemies = [];
var heroBullets = [];
var enemyBullets = [];
var score = 0;
var scoreTxt = new Text2(score.toString(), {
  size: 150,
  fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
game.on('down', function (obj) {
  var pos = obj.event.getLocalPosition(game);
  hero.move(pos.x, pos.y);
});
LK.on('tick', function () {
  // Move hero bullets
  for (var i = heroBullets.length - 1; i >= 0; i--) {
    heroBullets[i].move();
    if (heroBullets[i].y < 0) {
      heroBullets[i].destroy();
      heroBullets.splice(i, 1);
    }
  }
  // Move enemies
  for (var j = enemies.length - 1; j >= 0; j--) {
    enemies[j].move();
    if (enemies[j].y > 2732) {
      enemies[j].destroy();
      enemies.splice(j, 1);
    }
  }
  // Check for collisions
  for (var k = heroBullets.length - 1; k >= 0; k--) {
    for (var l = enemies.length - 1; l >= 0; l--) {
      if (heroBullets[k].intersects(enemies[l])) {
        heroBullets[k].destroy();
        heroBullets.splice(k, 1);
        enemies[l].destroy();
        enemies.splice(l, 1);
        score += 10;
        scoreTxt.setText(score.toString());
        break;
      }
    }
  }
  // Spawn enemies
  if (LK.ticks % 120 == 0) {
    var enemy = new Enemy();
    enemy.x = Math.random() * (2048 - enemy.width) + enemy.width / 2;
    enemy.y = -enemy.height / 2;
    enemies.push(enemy);
    game.addChild(enemy);
  }
  // Hero shoot
  if (LK.ticks % 30 == 0) {
    heroBullets.push(hero.shoot());
  }
});