/***********************************************************************************************************************************************************************
 * File Name: response.util.js
 * Type of Program: Utility
 * Description: Standardised HTTP response helpers.
 *              Wraps all responses in a consistent envelope:
 *              { status, message, data?, errors? }
 * Author: rgrgogu
 * Date Created: Oct. 6, 2025
 ***********************************************************************************************************************************************************************
 * HOW TO USE:
 *   const R = require('../utils/response.util');
 *   return R.success(res, 'User created', user, 201);
 *   return R.error(res, 'Not found', 404);
 ***********************************************************************************************************************************************************************/

const success = (res, message = 'OK', data = null, statusCode = 200) =>
  res.status(statusCode).json({ status: 'success', message, data });

const error = (res, message = 'An error occurred', statusCode = 500, errors = null) => {
  const body = { status: 'error', message };
  if (errors) body.errors = errors;
  return res.status(statusCode).json(body);
};

const validationError = (res, errors) =>
  res.status(422).json({ status: 'error', message: 'Validation failed', errors });

module.exports = { success, error, validationError };