import { Request, Response, NextFunction } from 'express';

export interface ApiError extends Error {
  statusCode?: number;
  code?: string;
}

export const errorHandler = (
  err: ApiError,
  _req: Request,
  res: Response,
  _next: NextFunction
) => {
  console.error('Error:', err);

  const statusCode = err.statusCode || 500;
  const message = err.message || 'Internal Server Error';

  res.status(statusCode).json({
    error: {
      message,
      code: err.code || 'INTERNAL_ERROR',
      ...(process.env.NODE_ENV === 'development' && { stack: err.stack })
    }
  });
};

export const asyncHandler = (fn: Function) => {
  return (req: Request, res: Response, next: NextFunction) => {
    Promise.resolve(fn(req, res, next)).catch(next);
  };
};