/**

 *

 *    Copyright (c) 2023 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.

 */

#include <app/AttributeAccessInterfaceRegistry.h>

#include <app/util/attribute-storage.h>

#include <app/util/config.h>

#include "laundry-dryer-controls-delegate.h"

#include "laundry-dryer-controls-server.h"

#include <app-common/zap-generated/attributes/Accessors.h>

#include <app-common/zap-generated/callback.h>

#include <app-common/zap-generated/cluster-enums.h>

#include <app-common/zap-generated/cluster-objects.h>

#include <app-common/zap-generated/ids/Attributes.h>

#include <app-common/zap-generated/ids/Clusters.h>

#include <app/AttributeValueEncoder.h>

#include <app/CommandHandler.h>

#include <app/ConcreteAttributePath.h>

#include <app/ConcreteCommandPath.h>

#include <app/server/Server.h>

#include <lib/core/CHIPEncoding.h>

using namespace chip;

using namespace chip::app;

using namespace chip::app::Clusters;

using namespace chip::app::Clusters::LaundryDryerControls;

using namespace chip::app::Clusters::LaundryDryerControls::Attributes;

using chip::Protocols::InteractionModel::Status;

static constexpr size_t kLaundryDryerControlsDelegateTableSize =

    MATTER_DM_LAUNDRY_DRYER_CONTROLS_CLUSTER_SERVER_ENDPOINT_COUNT + CHIP_DEVICE_CONFIG_DYNAMIC_ENDPOINT_COUNT;

// -----------------------------------------------------------------------------

// Delegate Implementation

//

namespace {

Delegate * gDelegateTable[kLaundryDryerControlsDelegateTableSize] = { nullptr };

}

namespace {

Delegate * GetDelegate(EndpointId endpoint)

{

    uint16_t ep = emberAfGetClusterServerEndpointIndex(endpoint, LaundryDryerControls::Id,

                                                       MATTER_DM_LAUNDRY_DRYER_CONTROLS_CLUSTER_SERVER_ENDPOINT_COUNT);

    return (ep >= kLaundryDryerControlsDelegateTableSize ? nullptr : gDelegateTable[ep]);

}

} // namespace

LaundryDryerControlsServer LaundryDryerControlsServer::sInstance;

/**********************************************************

 * LaundryDryerControlsServer public methods

 *********************************************************/

void LaundryDryerControlsServer::SetDefaultDelegate(EndpointId endpoint, Delegate * delegate)

{

    uint16_t ep = emberAfGetClusterServerEndpointIndex(endpoint, LaundryDryerControls::Id,

                                                       MATTER_DM_LAUNDRY_DRYER_CONTROLS_CLUSTER_SERVER_ENDPOINT_COUNT);

    // if endpoint is found

    if (ep < kLaundryDryerControlsDelegateTableSize)

    {

        gDelegateTable[ep] = delegate;

    }

}

LaundryDryerControlsServer & LaundryDryerControlsServer::Instance()

{

    return sInstance;

}

Status LaundryDryerControlsServer::SetSelectedDrynessLevel(EndpointId endpointId, DrynessLevelEnum newSelectedDrynessLevel)

{

    DataModel::Nullable<DrynessLevelEnum> selectedDrynessLevel;

    Status res = SelectedDrynessLevel::Get(endpointId, selectedDrynessLevel);

    if ((res == Status::Success) && (selectedDrynessLevel != newSelectedDrynessLevel))

    {

        res = SelectedDrynessLevel::Set(endpointId, newSelectedDrynessLevel);

    }

    return res;

}

Status LaundryDryerControlsServer::GetSelectedDrynessLevel(EndpointId endpointId,

                                                           DataModel::Nullable<DrynessLevelEnum> & selectedDrynessLevel)

{

    return SelectedDrynessLevel::Get(endpointId, selectedDrynessLevel);

}

/**********************************************************

 * LaundryDryerControlsServer private methods

 *********************************************************/

CHIP_ERROR LaundryDryerControlsServer::Read(const ConcreteReadAttributePath & aPath, AttributeValueEncoder & aEncoder)

{

    if (aPath.mClusterId != LaundryDryerControls::Id)

    {

        // We shouldn't have been called at all.

        return CHIP_ERROR_INVALID_ARGUMENT;

    }

    switch (aPath.mAttributeId)

    {

    case Attributes::SupportedDrynessLevels::Id:

        return ReadSupportedDrynessLevels(aPath, aEncoder);

    default:

        break;

    }

    return CHIP_NO_ERROR;

}

CHIP_ERROR LaundryDryerControlsServer::ReadSupportedDrynessLevels(const ConcreteReadAttributePath & aPath,

                                                                  AttributeValueEncoder & aEncoder)

{

    Delegate * delegate = GetDelegate(aPath.mEndpointId);

    VerifyOrReturnError(delegate != nullptr, CHIP_ERROR_INCORRECT_STATE, ChipLogError(Zcl, "Delegate is nullptr"));

    return aEncoder.EncodeList([delegate](const auto & encoder) -> CHIP_ERROR {

        for (uint8_t i = 0; true; i++)

        {

            DrynessLevelEnum supportedDrynessLevel;

            auto err = delegate->GetSupportedDrynessLevelAtIndex(i, supportedDrynessLevel);

            if (err == CHIP_ERROR_PROVIDER_LIST_EXHAUSTED)

            {

                return CHIP_NO_ERROR;

            }

            ReturnErrorOnFailure(err);

            ReturnErrorOnFailure(encoder.Encode(supportedDrynessLevel));

        }

    });

}

/**********************************************************

 * Register LaundryDryerControlsServer

 *********************************************************/

void MatterLaundryDryerControlsPluginServerInitCallback()

{

    LaundryDryerControlsServer & laundryDryerControlsServer = LaundryDryerControlsServer::Instance();

    AttributeAccessInterfaceRegistry::Instance().Register(&laundryDryerControlsServer);

}

void MatterLaundryDryerControlsPluginServerShutdownCallback()

{

    LaundryDryerControlsServer & laundryDryerControlsServer = LaundryDryerControlsServer::Instance();

    AttributeAccessInterfaceRegistry::Instance().Unregister(&laundryDryerControlsServer);

}

Status MatterLaundryDryerControlsClusterServerPreAttributeChangedCallback(const chip::app::ConcreteAttributePath & attributePath,

                                                                          EmberAfAttributeType attributeType, uint16_t size,

                                                                          uint8_t * value)

{

    Delegate * delegate = GetDelegate(attributePath.mEndpointId);

    VerifyOrDie((delegate != nullptr) && "Dryer Controls implementation requires a registered delegate for validation.");

    switch (attributePath.mAttributeId)

    {

    case Attributes::SelectedDrynessLevel::Id: {

        uint8_t drynessLevelIdx = 0;

        if (NumericAttributeTraits<uint8_t>::IsNullValue(*value))

        {

            return Status::Success;

        }

        while (true)

        {

            DrynessLevelEnum supportedDryness;

            auto err = delegate->GetSupportedDrynessLevelAtIndex(drynessLevelIdx, supportedDryness);

            if (err != CHIP_NO_ERROR)

            {

                // Can't find the attribute to be written in the supported list (CHIP_ERROR_PROVIDER_LIST_EXHAUSTED)

                // Or can't get the correct supported list

                return Status::ConstraintError;

            }

            static_assert(sizeof(DrynessLevelEnum) == sizeof(*value), "Enum size doesn't match parameter size");

            if (supportedDryness == static_cast<DrynessLevelEnum>(*value))

            {

                // The written attribute is one of the supported item

                return Status::Success;

            }

            drynessLevelIdx++;

        }

    }

    }

    return Status::Success;

}