import { Request, Response, NextFunction } from 'express';
import { AppError, err } from '../types/index';

export function errorHandler(
  error: Error,
  _req: Request,
  res: Response,
  _next: NextFunction
): void {
  const statusCode = error instanceof AppError ? error.statusCode : 500;
  const code = error instanceof AppError ? error.code : 'INTERNAL_ERROR';
  const message =
    process.env.NODE_ENV === 'production' && statusCode === 500
      ? 'Internal server error'
      : error.message;

  if (statusCode === 500 && process.env.NODE_ENV !== 'production') {
    console.error('[ErrorHandler]', error);
  }

  res.status(statusCode).json(err(message, code ? { code } : undefined));
}