/*
* Copyright (C) 2021-2022 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

import { AsyncCallback } from "./basic";

/**
 * Provides Environment APIs.
 *
 * @since 8
 * @syscap SystemCapability.FileManagement.File.Environment
 * @systemapi
 */
declare namespace Environment {
  /**
   * Get the user data path.
   *
   * @since 8
   * @syscap SystemCapability.FileManagement.File.Environment
   * @systemapi
   * @param {AsyncCallback<string>} [callback] - callback
   * @returns {void | Promise<string>} no callback return Promise otherwise return void
   * @throws { BusinessError } 202  - The caller is not a system application
   * @throws { BusinessError } 13900020  - Invalid argument
   * @throws { BusinessError } 13900042  - Unknown error
   */
  function getStorageDataDir(): Promise<string>;
  function getStorageDataDir(callback: AsyncCallback<string>): void;

  /**
   * Get the User storage path.
   *
   * @since 8
   * @syscap SystemCapability.FileManagement.File.Environment
   * @systemapi
   * @param {AsyncCallback<string>} [callback] - callback
   * @returns {void | Promise<string>} no callback return Promise otherwise return void
   * @throws { BusinessError } 202  - The caller is not a system application
   * @throws { BusinessError } 13900020  - Invalid argument
   * @throws { BusinessError } 13900042  - Unknown error
   */
  function getUserDataDir(): Promise<string>;
  function getUserDataDir(callback: AsyncCallback<string>): void;
}

export default Environment;