/****
* Classes
****/
// Hero class
var Hero = Container.expand(function () {
  var self = Container.call(this);
  var heroGraphics = self.attachAsset('hero', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.shoot = function () {
    var bullet = new HeroBullet();
    bullet.x = self.x;
    bullet.y = self.y - self.height / 2;
    game.addChild(bullet);
    heroBullets.push(bullet);
  };
});
// Enemy class
var Enemy = Container.expand(function () {
  var self = Container.call(this);
  var enemyGraphics = self.attachAsset('enemy', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.move = function () {
    self.y += 2;
    if (self.y > 2732 + self.height) {
      self.destroy();
      enemies.splice(enemies.indexOf(self), 1);
    }
  };
  self.shoot = function () {
    var bullet = new EnemyBullet();
    bullet.x = self.x;
    bullet.y = self.y + self.height / 2;
    game.addChild(bullet);
    enemyBullets.push(bullet);
  };
});
// HeroBullet class
var HeroBullet = Container.expand(function () {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('heroBullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.move = function () {
    self.y -= 10;
    if (self.y < -self.height) {
      self.destroy();
      heroBullets.splice(heroBullets.indexOf(self), 1);
    }
  };
});
// EnemyBullet class
var EnemyBullet = Container.expand(function () {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('enemyBullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.move = function () {
    self.y += 5;
    if (self.y > 2732 + self.height) {
      self.destroy();
      enemyBullets.splice(enemyBullets.indexOf(self), 1);
    }
  };
});

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

/****
* Game Code
****/
// Initialize hero
// Define the assets for the hero, enemy robots, and bullets
var hero = game.addChild(new Hero());
hero.x = 2048 / 2;
hero.y = 2732 - 100;
// Initialize enemy and bullet arrays
var enemies = [];
var heroBullets = [];
var enemyBullets = [];
// Handle shooting
game.on('down', function (obj) {
  hero.shoot();
});
// Game tick event
LK.on('tick', function () {
  // Move hero bullets
  for (var i = heroBullets.length - 1; i >= 0; i--) {
    heroBullets[i].move();
  }
  // Move enemy bullets
  for (var j = enemyBullets.length - 1; j >= 0; j--) {
    enemyBullets[j].move();
  }
  // Move enemies and randomly shoot
  for (var k = enemies.length - 1; k >= 0; k--) {
    enemies[k].move();
    if (Math.random() < 0.01) {
      enemies[k].shoot();
    }
  }
  // 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;
    game.addChild(enemy);
    enemies.push(enemy);
  }
  // Check for collisions between hero bullets and enemies
  for (var h = heroBullets.length - 1; h >= 0; h--) {
    for (var e = enemies.length - 1; e >= 0; e--) {
      if (heroBullets[h].intersects(enemies[e])) {
        heroBullets[h].destroy();
        heroBullets.splice(h, 1);
        enemies[e].destroy();
        enemies.splice(e, 1);
        break;
      }
    }
  }
  // Check for collisions between enemy bullets and hero
  for (var eb = enemyBullets.length - 1; eb >= 0; eb--) {
    if (enemyBullets[eb].intersects(hero)) {
      // Flash screen red for 1 second (1000ms) to show damage taken
      LK.effects.flashScreen(0xff0000, 1000);
      // Show game over
      LK.showGameOver();
      break;
    }
  }
});