text: const httpStatus = require('http-status');
  const { User } = require('../models');
  const ApiError = require('../utils/ApiError');
  
  /**
   * Create a user
   * @param {Object} userBody
   * @returns {Promise<User>}
   */
  const createUser = async (userBody) => {
    const user = await User.create(userBody);
    return user;
  };
  
  /**
   * Query for users
   * @param {Object} filter - Mongo filter
   * @param {Object} options - Query options
   * @param {string} [options.sortBy] - Sort option in the format: sortField:(desc|asc)
   * @param {number} [options.limit] - Maximum number of results per page (default = 10)
   * @param {number} [options.page] - Current page (default = 1)
   * @returns {Promise<QueryResult>}
   */
  const queryUsers = async (filter, options) => {
    const users = await User.paginate(filter, options);
    return users;
  };
  
  /**
   * Get user by id
   * @param {ObjectId} id
   * @returns {Promise<User>}
   */
  const getUserById = async (id) => {
    return User.findById(id);
  };
  
  /**
   * Get user by email
   * @param {string} email
   * @returns {Promise<User>}
   */
  const getUserByEmail = async (email) => {
    return User.findOne({ email });
  };
  
  /**
   * Update user by id
   * @param {ObjectId} userId
   * @param {Object} updateBody
   * @returns {Promise<User>}
   */
  const updateUserById = async (userId, updateBody) => {
    const user = await getUserById(userId);
    if (!user) {
      throw new ApiError(httpStatus.NOT_FOUND, 'User not found');
    }
    Object.assign(user, updateBody);
    await user.save();
    return user;
  };
  
  /**
   * Delete user by id
   * @param {ObjectId} userId
   * @returns {Promise<User>}
   */
  const deleteUserById = async (userId) => {
    const user = await getUserById(userId);
    if (!user) {
      throw new ApiError(httpStatus.NOT_FOUND, 'User not found');
    }
    await user.remove();
    return user;
  };
  
  module.exports = {
    createUser,
    queryUsers,
    getUserById,
    getUserByEmail,
    updateUserById,
    deleteUserById,
  };
  