/*

 *

 *    Copyright (c) 2023 Project CHIP Authors

 *    All rights reserved.

 *

 *    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.

 */

#include "DefaultTimeSyncDelegate.h"

#include "inet/IPAddress.h"

#include <platform/RuntimeOptionsProvider.h>

#include <system/SystemClock.h>

using chip::TimeSyncDataProvider;

using namespace chip::app::Clusters::TimeSynchronization;

bool DefaultTimeSyncDelegate::IsNTPAddressValid(chip::CharSpan ntp)

{

    // placeholder implementation

    chip::Inet::IPAddress addr;

    return chip::Inet::IPAddress::FromString(ntp.data(), ntp.size(), addr) && addr.IsIPv6();

}

bool DefaultTimeSyncDelegate::IsNTPAddressDomain(chip::CharSpan ntp)

{

    // For now, assume anything that includes a . is a domain name.

    // Delegates are free to evaluate this properly if they actually HAVE domain

    // name resolution, rather than just implementing a dummy for testing.

    return !IsNTPAddressValid(ntp) && (memchr(ntp.data(), '.', ntp.size()) != nullptr);

}

CHIP_ERROR DefaultTimeSyncDelegate::UpdateTimeFromPlatformSource(chip::Callback::Callback<OnTimeSyncCompletion> * callback)

{

    System::Clock::Microseconds64 utcTime;

    if (chip::app::RuntimeOptionsProvider::Instance().GetSimulateNoInternalTime())

    {

        return CHIP_ERROR_NOT_IMPLEMENTED;

    }

    if (System::SystemClock().GetClock_RealTime(utcTime) == CHIP_NO_ERROR)

    {

        // Default assumes the time came from NTP. Platforms using other sources should overwrite this

        // with their own delegates

        // Call the callback right away from within this function

        callback->mCall(callback->mContext, TimeSourceEnum::kMixedNTP, GranularityEnum::kMillisecondsGranularity);

        return CHIP_NO_ERROR;

    }

    return CHIP_ERROR_NOT_IMPLEMENTED;

}