/**
 * Moth Game Framework
 * Higher-level game development framework built on top of Prosperon
 */
 
// Check if we received the required delay function
if (!arg || arg.length === 0 || typeof arg[0] !== 'function') {
  throw new Error("moth module requires $_.delay function as first argument. Usage: use('moth', $_.delay)");
}

// Verify it's actually a delay function by checking if it has the expected behavior
var delay = arg[0];
if (!delay.name || (delay.name !== 'delay' && !delay.name.includes('delay'))) {
  console.warn("Warning: The function passed to moth module may not be $_.delay");
}

var os = use('os');
var io = use('io');
var render = use('render');
var actor = use('actor');
var transform = use('transform');

var gameConfig = {};
var gameDir = "";

// Framework initialization
function initialize() {
  var configPath = `config.js`;
  if (io.exists(configPath))
    gameConfig = use(configPath);
  
  // Set up default config values
  gameConfig.resolution = gameConfig.resolution || { width: 640, height: 480 };
  gameConfig.internal_resolution = gameConfig.internal_resolution || gameConfig.resolution;
  gameConfig.title = gameConfig.title || "Moth Game";
  gameConfig.fps = gameConfig.fps || 60;
  gameConfig.clearColor = gameConfig.clearColor || [0, 0, 0, 1];
  
  // Initialize render system
  render.initialize({
    width: gameConfig.resolution.width,
    height: gameConfig.resolution.height,
    resolution_x: gameConfig.internal_resolution.width,
    resolution_y: gameConfig.internal_resolution.height,
    mode: gameConfig.mode || 'letterbox'
  });
  
  // Set up default camera
  gameConfig.camera = gameConfig.camera || {
    size: [gameConfig.internal_resolution.width, gameConfig.internal_resolution.height],
    transform: new transform,
    fov: 50,
    near_z: 0,
    far_z: 1000,
    surface: undefined,
    viewport: {x: 0, y: 0, width: 1, height: 1},
    ortho: true,
    anchor: [0, 0]
  };
  
  // Set window title
  prosperon.window.title = gameConfig.title;

  startGameLoop();
}

// Main game loop
function startGameLoop() {
  var last = os.now();
  var fpsTimer = 0;
  var fpsCount = 0;
  var targetFrameTime = 1 / gameConfig.fps;
  
  function loop() {
    var now = os.now();
    var dt = now - last;
    last = now;
    
    // Dispatch update event
    prosperon.dispatch('update', dt);
    
    // Clear and set up rendering
    render.clear(gameConfig.clearColor);
    render.camera(gameConfig.camera);
    
    // Dispatch draw event
    prosperon.dispatch('draw');
    
    // Present the frame
    render.present();
    
    // FPS counter
    fpsTimer += dt;
    fpsCount++;
    if (fpsTimer >= 0.5) {
      // Only update if the title wasn't changed by the game
      if (prosperon.window.title === gameConfig.title) {
        prosperon.window.title = `${gameConfig.title} - FPS ${(fpsCount / fpsTimer).toFixed(1)}`;
      }
      fpsTimer = fpsCount = 0;
    }
    
    // Schedule next frame
    delay(loop, Math.max(0, targetFrameTime - (os.now() - now)));
  }
  
  loop();
}

// Public API
return {
  initialize: initialize,
  config: gameConfig
};