// Copyright © Advanced Micro Devices, Inc., or its affiliates.
// SPDX-License-Identifier:  MIT

#pragma once

#include <hipdnn_frontend/attributes/ConvolutionDgradAttributes.hpp>
#include <hipdnn_frontend/detail/ConvolutionPackerHelpers.hpp>
#include <hipdnn_frontend/detail/DescriptorHelpers.hpp>

namespace hipdnn_frontend::detail
{

// Builds a conv dgrad operation descriptor from ConvDgradAttributes.
// Tensor descriptors are created/deduplicated via ensureAndSetTensorRef.
inline Error createConvDgradOperation(
    const graph::ConvDgradAttributes& attributes,
    std::unordered_map<int64_t, ScopedHipdnnBackendDescriptor>& tensorDescs,
    std::vector<ScopedHipdnnBackendDescriptor>& operations)
{
    // Create operation descriptor
    ScopedHipdnnBackendDescriptor opDesc(
        HIPDNN_BACKEND_OPERATION_CONVOLUTION_BACKWARD_DATA_DESCRIPTOR);
    if(!opDesc.valid())
    {
        return {ErrorCode::HIPDNN_BACKEND_ERROR,
                "Failed to create conv dgrad operation descriptor"};
    }

    // Create tensor descriptors (if needed) and set them on the operation
    HIPDNN_CHECK_ERROR(ensureAndSetTensorRef(opDesc.get(),
                                             HIPDNN_ATTR_OPERATION_CONVOLUTION_BWD_DATA_DY,
                                             attributes.get_dy(),
                                             tensorDescs,
                                             "conv dgrad DY"));
    HIPDNN_CHECK_ERROR(ensureAndSetTensorRef(opDesc.get(),
                                             HIPDNN_ATTR_OPERATION_CONVOLUTION_BWD_DATA_W,
                                             attributes.get_w(),
                                             tensorDescs,
                                             "conv dgrad W"));
    HIPDNN_CHECK_ERROR(ensureAndSetTensorRef(opDesc.get(),
                                             HIPDNN_ATTR_OPERATION_CONVOLUTION_BWD_DATA_DX,
                                             attributes.get_dx(),
                                             tensorDescs,
                                             "conv dgrad DX"));

    // Pack shared convolution parameters
    HIPDNN_CHECK_ERROR(packConvolutionParams(opDesc.get(), attributes, "conv dgrad"));

    // Set operation name if provided
    auto& opName = attributes.get_name();
    if(!opName.empty())
    {
        HIPDNN_CHECK_ERROR(setDescriptorAttrString(
            opDesc.get(), HIPDNN_ATTR_OPERATION_NAME_EXT, opName, "convolutionbwd operation name"));
    }

    // Finalize operation descriptor
    HIPDNN_CHECK_ERROR(finalizeDescriptor(opDesc.get(), "conv dgrad operation descriptor"));

    operations.push_back(std::move(opDesc));
    return {};
}

} // namespace hipdnn_frontend::detail