/*
 * Copyright (C) 2021-2023 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.
 */

/**
 * @file
 * @kit TelephonyKit
 */

import type { Callback } from './@ohos.base';
import type radio from './@ohos.telephony.radio';
import type data from './@ohos.telephony.data';
import type call from './@ohos.telephony.call';
import type sim from './@ohos.telephony.sim';

/**
 * Monitors telephony state updates of a device, including updates of the network state,
 * signal strength, call state, the data link connection state and others.
 *
 * @namespace observer
 * @syscap SystemCapability.Telephony.StateRegistry
 * @since 6
 */
declare namespace observer {
  /**
   * Describes the network registration state.
   *
   * @typedef NetworkState
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  type NetworkState = radio.NetworkState;

  /**
   * Describes the signal strength information.
   *
   * @typedef SignalInformation
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  type SignalInformation = radio.SignalInformation;

  /**
   * Describes current cell information.
   *
   * @typedef CellInformation
   * @syscap SystemCapability.Telephony.StateRegistry
   * @systemapi Hide this for inner system use.
   * @since 6
   */
  type CellInformation = radio.CellInformation;

  /**
   * Describes the cellular data link connection state.
   *
   * @typedef DataConnectState
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  type DataConnectState = data.DataConnectState;

  /**
   * Describes the radio access technology.
   *
   * @typedef RatType
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  type RatType = radio.RadioTechnology;

  /**
   * Describes the cellular data flow type.
   *
   * @typedef DataFlowType
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  type DataFlowType = data.DataFlowType;

  /**
   * Indicates the states of call.
   *
   * @typedef CallState
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  type CallState = call.CallState;

  /**
   * Indicates the SIM card types.
   *
   * @typedef CardType
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  type CardType = sim.CardType;

  /**
   * Indicates the SIM card states.
   *
   * @typedef SimState
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  type SimState = sim.SimState;

  /**
   * Callback when the network state corresponding to the default sim card is updated.
   *
   * @permission ohos.permission.GET_NETWORK_INFO
   * @param { 'networkStateChange' } type - Event type. Indicates the networkStateChange event to be subscribed to.
   * @param { Callback<NetworkState> } callback - Indicates the callback for
   * getting an instance of the {@code NetworkState} class.
   * @throws { BusinessError } 201 - Permission denied.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  function on(type: 'networkStateChange', callback: Callback<NetworkState>): void;

  /**
   * Callback when the network state corresponding to the monitored {@code slotId} is updated.
   *
   * @permission ohos.permission.GET_NETWORK_INFO
   * @param { 'networkStateChange' } type - Event type. Indicates the networkStateChange event to be subscribed to.
   * @param { object } options - Indicates the ID of the target card slot.
   * The value {@code 0} indicates card 1, and the value {@code 1} indicates card 2.
   * @param { Callback<NetworkState> } callback - Indicates the callback for getting
   * an instance of the {@code NetworkState} class.
   * @throws { BusinessError } 201 - Permission denied.
   * @throws { BusinessError } 401 - Parameter error.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  /**
   * Callback when the network state corresponding to the monitored {@code slotId} is updated.
   *
   * @permission ohos.permission.GET_NETWORK_INFO
   * @param { 'networkStateChange' } type - Event type. Indicates the networkStateChange event to be subscribed to.
   * @param { ObserverOptions } options - Indicates the options for observer.
   * @param { Callback<NetworkState> } callback - Indicates the callback for getting
   * an instance of the {@code NetworkState} class.
   * @throws { BusinessError } 201 - Permission denied.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 11
   */
  function on(type: 'networkStateChange', options: ObserverOptions, callback: Callback<NetworkState>): void;

  /**
   * Cancel callback when the network state is updated.
   *
   * @param { 'networkStateChange' } type - Event type. Indicates the networkStateChange event to unsubscribe from.
   * @param { Callback<NetworkState> } callback - Indicates the callback for getting
   * an instance of the {@code NetworkState} class.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  function off(type: 'networkStateChange', callback?: Callback<NetworkState>): void;

  /**
   * Callback when the signal strength corresponding to the default sim card is updated.
   *
   * @param { 'signalInfoChange' } type - Event type. Indicates the signalInfoChange event to be subscribed to.
   * @param { Callback<Array<SignalInformation>> } callback - Indicates the callback for getting
   * an array of instances of the classes derived from {@link SignalInformation}.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  function on(type: 'signalInfoChange', callback: Callback<Array<SignalInformation>>): void;

  /**
   * Callback when the signal strength corresponding to a monitored {@code slotId} is updated.
   *
   * @param { 'signalInfoChange' } type - Event type. Indicates the signalInfoChange event to be subscribed to.
   * @param { object } options - Indicates the ID of the target card slot.
   * The value {@code 0} indicates card 1, and the value {@code 1} indicates card 2.
   * @param { Callback<Array<SignalInformation>> } callback - Indicates the callback for getting
   * an array of instances of the classes derived from {@link SignalInformation}.
   * @throws { BusinessError } 401 - Parameter error.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  /**
   * Callback when the signal strength corresponding to a monitored {@code slotId} is updated.
   *
   * @param { 'signalInfoChange' } type - Event type. Indicates the signalInfoChange event to be subscribed to.
   * @param { ObserverOptions } options - Indicates the options for observer.
   * @param { Callback<Array<SignalInformation>> } callback - Indicates the callback for getting
   * an array of instances of the classes derived from {@link SignalInformation}.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 11
   */
  function on(type: 'signalInfoChange', options: ObserverOptions, callback: Callback<Array<SignalInformation>>): void;

  /**
   * Cancel callback when the signal strength is updated.
   *
   * @param { 'signalInfoChange' } type - Event type. Indicates the signalInfoChange event to unsubscribe from.
   * @param { Callback<Array<SignalInformation>> } callback - Indicates the callback to unsubscribe from
   * the signalInfoChange event.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  function off(type: 'signalInfoChange', callback?: Callback<Array<SignalInformation>>): void;

  /**
   * Callback when the cell information corresponding to the default sim card is updated.
   *
   * @permission ohos.permission.LOCATION and ohos.permission.APPROXIMATELY_LOCATION
   * @param { 'cellInfoChange' } type - Event type. Indicates the cellInfoChange event to be subscribed to.
   * @param { Callback<Array<CellInformation>> } callback - Indicates the callback for getting
   * an array of instances of the classes derived from {@link CellInformation}.
   * @throws { BusinessError } 201 - Permission denied.
   * @throws { BusinessError } 202 - Non-system applications use system APIs.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @systemapi Hide this for inner system use.
   * @since 8
   */
  function on(type: 'cellInfoChange', callback: Callback<Array<CellInformation>>): void;

  /**
   * Callback when the cell information corresponding to a monitored {@code slotId} is updated.
   *
   * @permission ohos.permission.LOCATION and ohos.permission.APPROXIMATELY_LOCATION
   * @param { 'cellInfoChange' } type - Event type. Indicates the cellInfoChange event to be subscribed to.
   * @param { object } options - Indicates the ID of the target card slot.
   * The value {@code 0} indicates card 1, and the value {@code 1} indicates card 2.
   * @param { Callback<Array<CellInformation>> } callback - Indicates the callback for getting
   * an array of instances of the classes derived from {@link CellInformation}.
   * @throws { BusinessError } 201 - Permission denied.
   * @throws { BusinessError } 202 - Non-system applications use system APIs.
   * @throws { BusinessError } 401 - Parameter error.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @systemapi Hide this for inner system use.
   * @since 8
   */
  /**
   * Callback when the cell information corresponding to a monitored {@code slotId} is updated.
   *
   * @permission ohos.permission.LOCATION and ohos.permission.APPROXIMATELY_LOCATION
   * @param { 'cellInfoChange' } type - Event type. Indicates the cellInfoChange event to be subscribed to.
   * @param { ObserverOptions } options - Indicates the options for observer.
   * @param { Callback<Array<CellInformation>> } callback - Indicates the callback for getting
   * an array of instances of the classes derived from {@link CellInformation}.
   * @throws { BusinessError } 201 - Permission denied.
   * @throws { BusinessError } 202 - Non-system applications use system APIs.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @systemapi Hide this for inner system use.
   * @since 11
   */
  function on(type: 'cellInfoChange', options: ObserverOptions, callback: Callback<Array<CellInformation>>): void;

  /**
   * Cancel callback when the cell information is updated.
   *
   * @param { 'cellInfoChange' } type - Event type. Indicates the cellInfoChange event to unsubscribe from.
   * @param { Callback<Array<CellInformation>> } callback - Indicates the callback to unsubscribe from
   * the cellInfoChange event.
   * @throws { BusinessError } 202 - Non-system applications use system APIs.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @systemapi Hide this for inner system use.
   * @since 8
   */
  function off(type: 'cellInfoChange', callback?: Callback<Array<CellInformation>>): void;

  /**
   * Callback when the cellular data link connection state corresponding to the default sim card is updated.
   *
   * @param { 'cellularDataConnectionStateChange' } type - Event type. Indicates the cellularDataConnectionStateChange
   * event to be subscribed to.
   * @param { Callback<{ state: DataConnectState, network: RatType }> } callback - Indicates the callback for
   * getting the cellular data link connection state, and networkType Indicates the radio access technology
   * for cellular data services.
   * @throws { BusinessError } 401 - Parameter error.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 7
   */
  /**
   * Callback when the cellular data link connection state corresponding to the default sim card is updated.
   *
   * @param { 'cellularDataConnectionStateChange' } type - Event type. Indicates the cellularDataConnectionStateChange
   * event to be subscribed to.
   * @param { Callback<DataConnectionStateInfo> } callback - Indicates the callback for
   * getting the cellular data link connection state, and networkType Indicates the radio access technology
   * for cellular data services.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 11
   */
  function on(type: 'cellularDataConnectionStateChange', callback: Callback<DataConnectionStateInfo>): void;

  /**
   * Callback when the cellular data link connection state corresponding to the monitored {@code slotId} is updated.
   *
   * @param { 'cellularDataConnectionStateChange' } type - Event type. Indicates the cellularDataConnectionStateChange
   * event to be subscribed to.
   * @param { object } options - Indicates the ID of the target card slot.
   * The value {@code 0} indicates card 1, and the value {@code 1} indicates card 2.
   * @param { Callback<{ state: DataConnectState, network: RatType }> } callback - Indicates the callback for
   * getting the cellular data link connection state, and networkType Indicates the radio access technology for
   * cellular data services.
   * @throws { BusinessError } 401 - Parameter error.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 7
   */
  /**
   * Callback when the cellular data link connection state corresponding to the monitored {@code slotId} is updated.
   *
   * @param { 'cellularDataConnectionStateChange' } type - Event type. Indicates the cellularDataConnectionStateChange
   * event to be subscribed to.
   * @param { ObserverOptions } options - Indicates the options for observer.
   * @param { Callback<DataConnectionStateInfo> } callback - Indicates the callback for
   * getting the cellular data link connection state, and networkType Indicates the radio access technology for
   * cellular data services.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 11
   */
  function on(type: 'cellularDataConnectionStateChange', options: ObserverOptions,
    callback: Callback<DataConnectionStateInfo>): void;

  /**
   * Cancel callback when the cellular data link connection state is updated.
   *
   * @param { 'cellularDataConnectionStateChange' } type - Event type. Indicates the cellularDataConnectionStateChange
   * event to unsubscribe from.
   * @param { Callback<{ state: DataConnectState, network: RatType }> } callback - Indicates the callback to unsubscribe
   * from the cellularDataConnectionStateChange event.
   * @throws { BusinessError } 401 - Parameter error.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 7
   */
  /**
   * Cancel callback when the cellular data link connection state is updated.
   *
   * @param { 'cellularDataConnectionStateChange' } type - Event type. Indicates the cellularDataConnectionStateChange
   * event to unsubscribe from.
   * @param { Callback<DataConnectionStateInfo> } callback - Indicates the callback to unsubscribe
   * from the cellularDataConnectionStateChange event.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 11
   */
  function off(type: 'cellularDataConnectionStateChange', callback?: Callback<DataConnectionStateInfo>): void;

  /**
   * Callback when the uplink and downlink data flow state of cellular data services
   * corresponding to the default sim card is updated.
   *
   * @param { 'cellularDataFlowChange' } type - Event type. Indicates the cellularDataFlowChange event to be subscribed to.
   * @param { Callback<DataFlowType> } callback - Indicates the callback for getting the cellular data flow state.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 7
   */
  function on(type: 'cellularDataFlowChange', callback: Callback<DataFlowType>): void;

  /**
   * Callback when the uplink and downlink data flow state of cellular data services
   * corresponding to the monitored {@code slotId} is updated.
   *
   * @param { 'cellularDataFlowChange' } type - Event type. Indicates the cellularDataFlowChange event to be subscribed to.
   * @param { object } options - Indicates the ID of the target card slot.
   * The value {@code 0} indicates card 1, and the value {@code 1} indicates card 2.
   * @param { Callback<DataFlowType> } callback - Indicates the callback for getting the cellular data flow state.
   * @throws { BusinessError } 401 - Parameter error.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 7
   */
  /**
   * Callback when the uplink and downlink data flow state of cellular data services
   * corresponding to the monitored {@code slotId} is updated.
   *
   * @param { 'cellularDataFlowChange' } type - Event type. Indicates the cellularDataFlowChange event to be subscribed to.
   * @param { ObserverOptions } options - Indicates the options for observer.
   * @param { Callback<DataFlowType> } callback - Indicates the callback for getting the cellular data flow state.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 11
   */
  function on(type: 'cellularDataFlowChange', options: ObserverOptions, callback: Callback<DataFlowType>): void;

  /**
   * Cancel callback when the uplink and downlink data flow state of cellular data services is updated.
   *
   * @param { 'cellularDataFlowChange' } type - Event type. Indicates the cellularDataFlowChange event to unsubscribe from.
   * @param { Callback<DataFlowType> } callback - Indicates the callback to unsubscribe from
   * the cellularDataFlowChange event.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 7
   */
  function off(type: 'cellularDataFlowChange', callback?: Callback<DataFlowType>): void;

  /**
   * Callback when the call state corresponding to the default sim card is updated.
   *
   * @param { 'callStateChange' } type - Event type. Indicates the callStateChange event to be subscribed to.
   * @param { Callback<{ state: CallState, number: string }> } callback - Indicates the callback for
   * getting the call state and the called number.
   * @throws { BusinessError } 401 - Parameter error.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  /**
   * Callback when the call state corresponding to the default sim card is updated.
   *
   * @param { 'callStateChange' } type - Event type. Indicates the callStateChange event to be subscribed to.
   * @param { Callback<CallStateInfo> } callback - Indicates the callback for
   * getting the call state and the called number.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 11
   */
  function on(type: 'callStateChange', callback: Callback<CallStateInfo>): void;

  /**
   * Callback when the call state corresponding to the monitored {@code slotId} is updated.
   *
   * @param { 'callStateChange' } type - Event type. Indicates the callStateChange event to be subscribed to.
   * @param { object } options - Indicates the ID of the target card slot.
   * The value {@code 0} indicates card 1, and the value {@code 1} indicates card 2.
   * @param { Callback<{ state: CallState, number: string }> } callback - Indicates the callback for
   * getting the call state and the called number.
   * @throws { BusinessError } 401 - Parameter error.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  /**
   * Callback when the call state corresponding to the monitored {@code slotId} is updated.
   *
   * @param { 'callStateChange' } type - Event type. Indicates the callStateChange event to be subscribed to.
   * @param { ObserverOptions } options - Indicates the options for observer.
   * @param { Callback<CallStateInfo> } callback - Indicates the callback for
   * getting the call state and the called number.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 11
   */
  function on(type: 'callStateChange', options: ObserverOptions, callback: Callback<CallStateInfo>): void;

  /**
   * Cancel callback when the call state is updated.
   *
   * @param { 'callStateChange' } type - Event type. Indicates the callStateChange event to unsubscribe from.
   * @param { Callback<{ state: CallState, number: string }> } callback - Indicates the callback to
   * unsubscribe from the callStateChange event.
   * @throws { BusinessError } 401 - Parameter error.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 6
   */
  /**
   * Cancel callback when the call state is updated.
   *
   * @param { 'callStateChange' } type - Event type. Indicates the callStateChange event to unsubscribe from.
   * @param { Callback<CallStateInfo> } callback - Indicates the callback to
   * unsubscribe from the callStateChange event.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 11
   */
  function off(type: 'callStateChange', callback?: Callback<CallStateInfo>): void;

  /**
   * Callback when the sim state corresponding to the default sim card is updated.
   *
   * @param { 'simStateChange' } type - Event type. Indicates the simStateChange event to be subscribed to.
   * @param { Callback<SimStateData> } callback - Indicates the callback for getting the SimStateData object.
   * including state Indicates the sim state, and reason Indicates the cause of the change.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 7
   */
  function on(type: 'simStateChange', callback: Callback<SimStateData>): void;

  /**
   * Callback when the sim state corresponding to the monitored {@code slotId} is updated.
   *
   * @param { 'simStateChange' } type - Event type. Indicates the simStateChange event to be subscribed to.
   * @param { object } options - Indicates the ID of the target card slot.
   * The value {@code 0} indicates card 1, and the value {@code 1} indicates card 2.
   * @param { Callback<SimStateData> } callback - Indicates the callback for getting the SimStateData object.
   * @throws { BusinessError } 401 - Parameter error.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 7
   */
  /**
   * Callback when the sim state corresponding to the monitored {@code slotId} is updated.
   *
   * @param { 'simStateChange' } type - Event type. Indicates the simStateChange event to be subscribed to.
   * @param { ObserverOptions } options - Indicates the options for observer.
   * @param { Callback<SimStateData> } callback - Indicates the callback for getting the SimStateData object.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 11
   */
  function on(type: 'simStateChange', options: ObserverOptions, callback: Callback<SimStateData>): void;

  /**
   * Cancel callback when the sim state is updated.
   *
   * @param { 'simStateChange' } type - Event type. Indicates the simStateChange event to unsubscribe from.
   * @param { Callback<SimStateData> } callback - Indicates the callback to unsubscribe from the simStateChange event.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 7
   */
  function off(type: 'simStateChange', callback?: Callback<SimStateData>): void;

  /**
   * Receives an ICC account change. This callback is invoked when the ICC account updates
   * and the observer is added to monitor the updates.
   *
   * @param { 'iccAccountInfoChange' } type - iccAccountInfoChange
   * @param { Callback<void> } callback - including state Indicates the ICC account information,
   * and reason Indicates the cause of the change.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 10
   */
  function on(type: 'iccAccountInfoChange', callback: Callback<void>): void;

  /**
   * Cancel to receive an ICC account change.
   *
   * @param { 'iccAccountInfoChange' } type - iccAccountInfoChange
   * @param { Callback<void> } callback - including state Indicates the ICC account information,
   * and reason Indicates the cause of the change.
   * @throws { BusinessError } 401 - Parameter error.Possible causes: 1. Mandatory parameters are left unspecified.
   * 2. Incorrect parameter types.
   * @throws { BusinessError } 8300001 - Invalid parameter value.
   * @throws { BusinessError } 8300002 - Operation failed. Cannot connect to service.
   * @throws { BusinessError } 8300003 - System internal error.
   * @throws { BusinessError } 8300999 - Unknown error code.
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 10
   */
  function off(type: 'iccAccountInfoChange', callback?: Callback<void>): void;

  /**
   * Indicates SIM card type and status.
   *
   * @interface SimStateData
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 7
   */
  export interface SimStateData {
    /**
     * Indicates the SIM card type.
     *
     * @type { CardType }
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 7
     */
    type: CardType;

    /**
     * Indicates the SIM card states.
     *
     * @type { SimState }
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 7
     */
    state: SimState;

    /**
     * Indicates the SIM card lock type.
     *
     * @type { LockReason }
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    reason: LockReason;
  }

  /**
   * Indicates call state and number.
   *
   * @interface CallStateInfo
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 11
   */
  export interface CallStateInfo {
    /**
     * Indicates call state.
     *
     * @type { CallState }
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 11
     */
    state: CallState;

    /**
     * Indicates call number.
     *
     * @type { string }
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 11
     */
    number: string;
  }

  /**
   * Indicates cellular data connect state and technology type.
   *
   * @interface DataConnectionStateInfo
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 11
   */
  export interface DataConnectionStateInfo {
    /**
     * Indicates cellular data connect state.
     *
     * @type { DataConnectState }
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 11
     */
    state: DataConnectState;

    /**
     * Indicates technology type.
     *
     * @type { RatType }
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 11
     */
    network: RatType;
  }

  /**
   * Indicates observer options.
   *
   * @interface ObserverOptions
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 11
   */
  export interface ObserverOptions {
    /**
     * Indicates the ID of the target card slot.
     *
     * @type { number }
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 11
     */
    slotId: number;
  }

  /**
   * Enum for SIM card lock type.
   *
   * @enum { number }
   * @syscap SystemCapability.Telephony.StateRegistry
   * @since 8
   */
  export enum LockReason {
    /**
     * Indicates no SIM lock.
     *
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    SIM_NONE,

    /**
     * Indicates the PIN lock.
     *
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    SIM_PIN,

    /**
     * Indicates the PUK lock.
     *
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    SIM_PUK,

    /**
     * Indicates network personalization of PIN lock(refer 3GPP TS 22.022 [33]).
     *
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    SIM_PN_PIN,

    /**
     * Indicates network personalization of PUK lock(refer 3GPP TS 22.022 [33]).
     *
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    SIM_PN_PUK,

    /**
     * Indicates network subset personalization of PIN lock(refer 3GPP TS 22.022 [33]).
     *
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    SIM_PU_PIN,

    /**
     * Indicates network subset personalization of PUK lock(refer 3GPP TS 22.022 [33]).
     *
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    SIM_PU_PUK,

    /**
     * Indicates service provider personalization of PIN lock(refer 3GPP TS 22.022 [33]).
     *
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    SIM_PP_PIN,

    /**
     * Indicates service provider personalization of PUK lock(refer 3GPP TS 22.022 [33]).
     *
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    SIM_PP_PUK,

    /**
     * Indicates corporate personalization of PIN lock(refer 3GPP TS 22.022 [33]).
     *
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    SIM_PC_PIN,

    /**
     * Indicates corporate personalization of PUK lock(refer 3GPP TS 22.022 [33]).
     *
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    SIM_PC_PUK,

    /**
     * Indicates SIM/USIM personalization of PIN lock(refer 3GPP TS 22.022 [33]).
     *
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    SIM_SIM_PIN,

    /**
     * Indicates SIM/USIM personalization of PUK lock(refer 3GPP TS 22.022 [33]).
     *
     * @syscap SystemCapability.Telephony.StateRegistry
     * @since 8
     */
    SIM_SIM_PUK,
  }
}

export default observer;