/*
 * Copyright (c) 2023 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, BusinessError, Callback } from './@ohos.base';

/**
 * Provides thermal level-related callback and query APIs to obtain the information required for
 * temperature control. The APIs are as follows:
 * {@link registerThermalLevelCallback}: subscribes to callbacks of thermal level changes.
 * {@link getLevel}: obtains the thermal level of the system in real time.
 *
 * @namespace thermal
 * @syscap SystemCapability.PowerManager.ThermalManager
 * @since 8
 */
declare namespace thermal {
  /**
   * Enumerates the {@link ThermalLevel} types.
   *
   * @enum {number}
   * @syscap SystemCapability.PowerManager.ThermalManager
   * @since 8
   */
  export enum ThermalLevel {
    /**
     * The device is cool, and services are not restricted.
     *
     * @syscap SystemCapability.PowerManager.ThermalManager
     * @since 8
     */
    COOL = 0,
    /**
     * The device is operational but is not cool. You need to pay attention to its heating.
     *
     * @syscap SystemCapability.PowerManager.ThermalManager
     * @since 8
     */
    NORMAL = 1,
    /**
     * The device is warm. You need to stop or delay some imperceptible services.
     *
     * @syscap SystemCapability.PowerManager.ThermalManager
     * @since 8
     */
    WARM = 2,
    /**
     * The device is heating up. You need to stop all imperceptible services and downgrade
     * or reduce the load of other services.
     *
     * @syscap SystemCapability.PowerManager.ThermalManager
     * @since 8
     */
    HOT = 3,
    /**
     * The device is overheated. You need to stop all imperceptible services and downgrade
     * or reduce the load of major services.
     *
     * @syscap SystemCapability.PowerManager.ThermalManager
     * @since 8
     */
    OVERHEATED = 4,
    /**
     * The device is overheated and is about to enter the emergency state. You need to stop
     * all imperceptible services and downgrade major services to the maximum extent.
     *
     * @syscap SystemCapability.PowerManager.ThermalManager
     * @since 8
     */
    WARNING = 5,
    /**
     * The device has entered the emergency state. You need to stop all services except those
     * for the emergency help purposes.
     *
     * @syscap SystemCapability.PowerManager.ThermalManager
     * @since 8
     */
    EMERGENCY = 6
  }

  /**
   * Subscribes to callbacks of thermal level changes.
   *
   * @param { AsyncCallback<ThermalLevel> } callback Callback of thermal level changes. Returns the thermal level.
   * @syscap SystemCapability.PowerManager.ThermalManager
   * @since 8
   * @deprecated since 9
   * @useinstead thermal#registerThermalLevelCallback
   */
  function subscribeThermalLevel(callback: AsyncCallback<ThermalLevel>): void;

  /**
   * Registers to callbacks of thermal level changes.
   *
   * @param { Callback<ThermalLevel> } callback Callback of thermal level changes.
   * @throws { BusinessError } 401 - If callback is not valid.
   * @throws { BusinessError } 4800101 If connecting to the service failed.
   * @syscap SystemCapability.PowerManager.ThermalManager
   * @since 9
   */
  function registerThermalLevelCallback(callback: Callback<ThermalLevel>): void;

  /**
   * Unsubscribes from the callbacks of thermal level changes.
   *
   * @param { AsyncCallback<void> } callback Callback of thermal level changes.
   * @syscap SystemCapability.PowerManager.ThermalManager
   * @since 8
   * @deprecated since 9
   * @useinstead thermal#unregisterThermalLevelCallback
   */
  function unsubscribeThermalLevel(callback?: AsyncCallback<void>): void;

  /**
   * Unregisters from the callbacks of thermal level changes.
   *
   * @param { Callback<void> } callback Callback of thermal level changes.
   * @throws { BusinessError } 401 - If callback is not valid.
   * @throws { BusinessError } 4800101 If connecting to the service failed.
   * @syscap SystemCapability.PowerManager.ThermalManager
   * @since 9
   */
  function unregisterThermalLevelCallback(callback?: Callback<void>): void;

  /**
   * Obtains the current thermal level.
   *
   * @returns { ThermalLevel } Returns the thermal level.
   * @syscap SystemCapability.PowerManager.ThermalManager
   * @since 8
   * @deprecated since 9
   * @useinstead thermal#getLevel
   */
  function getThermalLevel(): ThermalLevel;

  /**
   * Obtains the current thermal level.
   *
   * @returns { ThermalLevel } The thermal level.
   * @throws { BusinessError } 4800101 If connecting to the service failed.
   * @syscap SystemCapability.PowerManager.ThermalManager
   * @since 9
   */
  function getLevel(): ThermalLevel;
}
export default thermal;