/*
 *
 *    Copyright (c) 2021 Project CHIP Authors
 *
 *    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
 *          Provides an implementation of the DiagnosticDataProvider object
 *          for Darwin platform.
 */

#include <platform/internal/CHIPDeviceLayerInternal.h>

#include <lib/support/SafeInt.h>
#include <lib/support/logging/CHIPLogging.h>
#include <platform/Darwin/DiagnosticDataProviderImpl.h>
#include <platform/DiagnosticDataProvider.h>

namespace chip {
namespace DeviceLayer {

DiagnosticDataProviderImpl & DiagnosticDataProviderImpl::GetDefaultInstance()
{
    static DiagnosticDataProviderImpl sInstance;
    return sInstance;
}

CHIP_ERROR DiagnosticDataProviderImpl::GetUpTime(uint64_t & upTime)
{
    System::Clock::Timestamp currentTime = System::SystemClock().GetMonotonicTimestamp();
    System::Clock::Timestamp startTime   = PlatformMgrImpl().GetStartTime();

    if (currentTime >= startTime)
    {
        upTime = std::chrono::duration_cast<System::Clock::Seconds64>(currentTime - startTime).count();
        return CHIP_NO_ERROR;
    }

    return CHIP_ERROR_INVALID_TIME;
}

CHIP_ERROR DiagnosticDataProviderImpl::GetTotalOperationalHours(uint32_t & totalOperationalHours)
{
    uint64_t upTime = 0;

    if (GetUpTime(upTime) == CHIP_NO_ERROR)
    {
        uint32_t totalHours = 0;
        if (ConfigurationMgr().GetTotalOperationalHours(totalHours) == CHIP_NO_ERROR)
        {
            VerifyOrReturnError(upTime / 3600 <= UINT32_MAX, CHIP_ERROR_INVALID_INTEGER_VALUE);
            totalOperationalHours = totalHours + static_cast<uint32_t>(upTime / 3600);
            return CHIP_NO_ERROR;
        }
    }

    return CHIP_ERROR_INVALID_TIME;
}

CHIP_ERROR DiagnosticDataProviderImpl::GetBootReason(BootReasonType & bootReason)
{
    uint32_t reason = 0;
    ReturnErrorOnFailure(ConfigurationMgr().GetBootReason(reason));

    VerifyOrReturnError(CanCastTo<BootReasonType>(reason), CHIP_ERROR_INVALID_INTEGER_VALUE);
    bootReason = static_cast<BootReasonType>(reason);

    return CHIP_NO_ERROR;
}

CHIP_ERROR DiagnosticDataProviderImpl::ResetWatermarks()
{
    // If implemented, the server SHALL set the value of the CurrentHeapHighWatermark attribute to the
    // value of the CurrentHeapUsed.
    // On Darwin, overide with non-op to pass CI.

    return CHIP_NO_ERROR;
}

CHIP_ERROR DiagnosticDataProviderImpl::GetRebootCount(uint16_t & rebootCount)
{
    uint32_t count = 0;

    ReturnErrorOnFailure(ConfigurationMgr().GetRebootCount(count));
    VerifyOrReturnError(count <= UINT16_MAX, CHIP_ERROR_INVALID_INTEGER_VALUE);
    rebootCount = static_cast<uint16_t>(count);

    return CHIP_NO_ERROR;
}

DiagnosticDataProvider & GetDiagnosticDataProviderImpl()
{
    return DiagnosticDataProviderImpl::GetDefaultInstance();
}

} // namespace DeviceLayer
} // namespace chip