/*
 *
 *    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 Genio platform.
 */

#include <platform/internal/CHIPDeviceLayerInternal.h>

#include <platform/DiagnosticDataProvider.h>
#include <platform/mt793x/DiagnosticDataProviderImpl.h>
#if CHIP_DEVICE_CONFIG_ENABLE_THREAD
#include <platform/OpenThread/GenericThreadStackManagerImpl_OpenThread.h>
#endif
#include <lwip/tcpip.h>

// #include "AppConfig.h"
#include "FreeRTOS.h"

using namespace ::chip::app::Clusters::GeneralDiagnostics;

namespace chip {
namespace DeviceLayer {

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

// Software Diagnostics Getters
/*
 * The following Heap stats keeps track of the number of calls to allocate
 * and free memory as well as the number of free bytes remaining, but says
 * nothing about fragmentation.
 */
CHIP_ERROR DiagnosticDataProviderImpl::GetCurrentHeapFree(uint64_t & currentHeapFree)
{
    size_t freeHeapSize = xPortGetFreeHeapSize();
    currentHeapFree     = static_cast<uint64_t>(freeHeapSize);
    return CHIP_NO_ERROR;
}

CHIP_ERROR DiagnosticDataProviderImpl::GetCurrentHeapUsed(uint64_t & currentHeapUsed)
{
    // Calculate the Heap used based on Total heap - Free heap
    int64_t heapUsed = (configTOTAL_HEAP_SIZE - xPortGetFreeHeapSize());

    // Something went wrong, this should not happen
    VerifyOrReturnError(heapUsed >= 0, CHIP_ERROR_INVALID_INTEGER_VALUE);
    currentHeapUsed = static_cast<uint64_t>(heapUsed);
    return CHIP_NO_ERROR;
}

CHIP_ERROR DiagnosticDataProviderImpl::GetCurrentHeapHighWatermark(uint64_t & currentHeapHighWatermark)
{
    // FreeRTOS records the lowest amount of available heap during runtime
    // currentHeapHighWatermark wants the highest heap usage point so we calculate it here
    int64_t HighestHeapUsageRecorded = (configTOTAL_HEAP_SIZE - xPortGetMinimumEverFreeHeapSize());

    // Something went wrong, this should not happen
    VerifyOrReturnError(HighestHeapUsageRecorded >= 0, CHIP_ERROR_INVALID_INTEGER_VALUE);
    currentHeapHighWatermark = static_cast<uint64_t>(HighestHeapUsageRecorded);

    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.

    return CHIP_NO_ERROR;
}

CHIP_ERROR DiagnosticDataProviderImpl::GetThreadMetrics(ThreadMetrics ** threadMetricsOut)
{
    *threadMetricsOut = NULL;
    return CHIP_NO_ERROR;
}

void DiagnosticDataProviderImpl::ReleaseThreadMetrics(ThreadMetrics * threadMetrics)
{
    while (threadMetrics)
    {
        ThreadMetrics * del = threadMetrics;
        threadMetrics       = threadMetrics->Next;
        delete del;
    }
}

// General Diagnostics Getters

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

    if (err == CHIP_NO_ERROR)
    {
        VerifyOrReturnError(count <= UINT16_MAX, CHIP_ERROR_INVALID_INTEGER_VALUE);
        rebootCount = static_cast<uint16_t>(count);
    }

    return err;
}

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

    if (err == CHIP_NO_ERROR)
    {
        VerifyOrReturnError(reason <= UINT8_MAX, CHIP_ERROR_INVALID_INTEGER_VALUE);
        bootReason = static_cast<BootReasonType>(reason);
    }

    return err;
}

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::GetActiveHardwareFaults(GeneralFaults<kMaxHardwareFaults> & hardwareFaults)
{
#if CHIP_CONFIG_TEST
    ReturnErrorOnFailure(hardwareFaults.add(to_underlying(HardwareFaultEnum::kRadio)));
    ReturnErrorOnFailure(hardwareFaults.add(to_underlying(HardwareFaultEnum::kSensor)));
    ReturnErrorOnFailure(hardwareFaults.add(to_underlying(HardwareFaultEnum::kPowerSource)));
    ReturnErrorOnFailure(hardwareFaults.add(to_underlying(HardwareFaultEnum::kUserInterfaceFault)));
#endif

    return CHIP_NO_ERROR;
}

CHIP_ERROR DiagnosticDataProviderImpl::GetActiveRadioFaults(GeneralFaults<kMaxRadioFaults> & radioFaults)
{
#if CHIP_CONFIG_TEST
    ReturnErrorOnFailure(radioFaults.add(to_underlying(RadioFaultEnum::kThreadFault)));
    ReturnErrorOnFailure(radioFaults.add(to_underlying(RadioFaultEnum::kBLEFault)));
#endif

    return CHIP_NO_ERROR;
}

CHIP_ERROR DiagnosticDataProviderImpl::GetActiveNetworkFaults(GeneralFaults<kMaxNetworkFaults> & networkFaults)
{
#if CHIP_CONFIG_TEST
    ReturnErrorOnFailure(networkFaults.add(to_underlying(NetworkFaultEnum::kHardwareFailure)));
    ReturnErrorOnFailure(networkFaults.add(to_underlying(NetworkFaultEnum::kNetworkJammed)));
    ReturnErrorOnFailure(networkFaults.add(to_underlying(NetworkFaultEnum::kConnectionFailed)));
#endif

    return CHIP_NO_ERROR;
}

CHIP_ERROR DiagnosticDataProviderImpl::GetNetworkInterfaces(NetworkInterface ** netifpp)
{
    NetworkInterface * ifp = new NetworkInterface();

#if CHIP_DEVICE_CONFIG_ENABLE_THREAD
    const char * threadNetworkName = otThreadGetNetworkName(ThreadStackMgrImpl().OTInstance());
    ifp->name                      = Span<const char>(threadNetworkName, strlen(threadNetworkName));
    ifp->fabricConnected           = true;
    ifp->offPremiseServicesReachableIPv4.SetNonNull(false);
    ifp->offPremiseServicesReachableIPv6.SetNonNull(false);
    ifp->type = InterfaceTypeEnum::kThread;
#else
    /* TODO */
#endif
    uint8_t macBuffer[ConfigurationManager::kPrimaryMACAddressLength];
    ConfigurationMgr().GetPrimary802154MACAddress(macBuffer);
    ifp->hardwareAddress = ByteSpan(macBuffer, ConfigurationManager::kPrimaryMACAddressLength);

    *netifpp = ifp;
    return CHIP_NO_ERROR;
}

void DiagnosticDataProviderImpl::ReleaseNetworkInterfaces(NetworkInterface * netifp)
{
    while (netifp)
    {
        NetworkInterface * del = netifp;
        netifp                 = netifp->Next;
        delete del;
    }
}

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

} // namespace DeviceLayer
} // namespace chip