/****
* Classes
****/
// Define the 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;
  };
});
// Define the 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;
  };
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Define the 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 movement logic will be handled in game.down and game.move
  };
});

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

/****
* Game Code
****/
// Initialize variables
var player;
var enemies = [];
var bullets = [];
var score = 0;
var lives = 10;
var level = 1;
var levelText;
var scoreText;
var livesText;
var enemySpeedMultiplier = 1;
var enemySpawnRate = 1000;
var enemySpawnTimer;
// Function to start a new level
function startLevel() {
  levelText.setText('LEVEL ' + level);
  levelText.visible = true;
  LK.setTimeout(function () {
    levelText.visible = false;
    spawnEnemies();
  }, 4000);
}
// Function to spawn enemies
function spawnEnemies() {
  enemySpawnTimer = LK.setInterval(function () {
    var enemy = new Enemy();
    enemy.x = Math.random() * 2048;
    enemy.y = -50;
    enemy.speed *= enemySpeedMultiplier;
    enemies.push(enemy);
    game.addChild(enemy);
  }, enemySpawnRate);
}
// Function to update score and level
function updateScore(points) {
  score += points;
  scoreText.setText('Score: ' + score);
  if (score >= 2500 * level) {
    level++;
    enemySpeedMultiplier *= 1.2;
    enemySpawnRate *= 0.7;
    clearEnemies();
    startLevel();
  }
}
// Function to clear enemies
function clearEnemies() {
  for (var i = 0; i < enemies.length; i++) {
    enemies[i].destroy();
  }
  enemies = [];
  LK.clearInterval(enemySpawnTimer);
}
// Initialize player
player = new Player();
player.x = 1024;
player.y = 2500;
game.addChild(player);
// Initialize texts
levelText = new Text2('LEVEL 1', {
  size: 150,
  fill: 0xFFFFFF
});
levelText.anchor.set(0.5, 0.5);
LK.gui.center.addChild(levelText);
scoreText = new Text2('Score: 0', {
  size: 100,
  fill: 0xFFFFFF
});
scoreText.anchor.set(0, 0);
LK.gui.topLeft.addChild(scoreText);
livesText = new Text2('Lives: 10', {
  size: 100,
  fill: 0xFFFFFF
});
livesText.anchor.set(1, 0);
LK.gui.topRight.addChild(livesText);
// Start the first level
startLevel();
// Handle player movement
game.down = function (x, y, obj) {
  player.x = x;
};
game.move = function (x, y, obj) {
  player.x = x;
};
// Handle shooting
game.up = function (x, y, obj) {
  var bullet = new Bullet();
  bullet.x = player.x;
  bullet.y = player.y;
  bullets.push(bullet);
  game.addChild(bullet);
};
// Game update loop
game.update = function () {
  // Update bullets
  for (var i = bullets.length - 1; i >= 0; i--) {
    bullets[i].update();
    if (bullets[i].y < -50) {
      bullets[i].destroy();
      bullets.splice(i, 1);
    }
  }
  // Update enemies
  for (var i = enemies.length - 1; i >= 0; i--) {
    enemies[i].update();
    if (enemies[i].y > 2732) {
      enemies[i].destroy();
      enemies.splice(i, 1);
      lives--;
      livesText.setText('Lives: ' + lives);
      if (lives <= 0) {
        LK.showGameOver();
      }
    }
  }
  // Check for collisions
  for (var i = bullets.length - 1; i >= 0; i--) {
    for (var j = enemies.length - 1; j >= 0; j--) {
      if (bullets[i].intersects(enemies[j])) {
        bullets[i].destroy();
        bullets.splice(i, 1);
        enemies[j].destroy();
        enemies.splice(j, 1);
        updateScore(50);
        break;
      }
    }
  }
};