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

#include <hipdnn_plugin_sdk/PluginException.hpp>
#include <hipdnn_plugin_sdk/PluginLogging.hpp>

#include "MiopenReluPlanBuilder.hpp"
#include "engines/plans/MiopenReluApplicabilityChecks.hpp"
#include "engines/plans/MiopenReluPlan.hpp"

namespace miopen_plugin
{

bool MiopenReluPlanBuilder::isApplicable(
    [[maybe_unused]] const HipdnnMiopenHandle& handle,
    const hipdnn_flatbuffers_sdk::flatbuffer_utilities::IGraph& opGraph) const
{
    // Execute-time override shapes can diverge from the compile-time dims this
    // builder matched exactly; the plan bakes those dims into the MIOpen
    // descriptors it builds, so decline rather than risk a mismatch (RFC 0008 §4.6).
    if(opGraph.getGraph().is_override_shape_enabled())
    {
        HIPDNN_PLUGIN_LOG_INFO("ReLU plan builder does not support override shapes");
        return false;
    }

    return relu_applicability::isReluSupported(opGraph);
}

size_t MiopenReluPlanBuilder::getMaxWorkspaceSize(
    [[maybe_unused]] const HipdnnMiopenHandle& handle,
    [[maybe_unused]] const hipdnn_flatbuffers_sdk::flatbuffer_utilities::IGraph& opGraph,
    [[maybe_unused]] const HipdnnMiopenSettings& executionSettings) const
{
    // ReLU operations do not require workspace memory.
    return 0u;
}

void MiopenReluPlanBuilder::initializeExecutionSettings(
    [[maybe_unused]] const HipdnnMiopenHandle& handle,
    [[maybe_unused]] const hipdnn_flatbuffers_sdk::flatbuffer_utilities::IGraph& opGraph,
    [[maybe_unused]] const hipdnn_flatbuffers_sdk::flatbuffer_utilities::IEngineConfig&
        engineConfig,
    [[maybe_unused]] HipdnnMiopenSettings& executionSettings) const
{
    // No execution settings are needed for ReLU operations.
}

void MiopenReluPlanBuilder::buildPlan(
    [[maybe_unused]] const HipdnnMiopenHandle& handle,
    const hipdnn_flatbuffers_sdk::flatbuffer_utilities::IGraph& opGraph,
    [[maybe_unused]] const hipdnn_flatbuffers_sdk::flatbuffer_utilities::IEngineConfig&
        engineConfig,
    HipdnnMiopenContext& executionContext) const
{
    // Preconditions are validated in isApplicable; no need to re-check here.
    const auto& nodeWrapper = opGraph.getNodeWrapper(0);
    const auto nodeName = nodeWrapper.name();

    HIPDNN_PLUGIN_LOG_INFO("Building ReLU plan for node: " << nodeName);

    const auto& attrs
        = nodeWrapper.attributesAs<hipdnn_flatbuffers_sdk::data_objects::PointwiseAttributes>();

    auto plan = std::make_unique<MiopenReluPlan>(attrs, opGraph.getTensorMap());
    executionContext.setPlan(std::move(plan));
}

std::vector<hipdnn_flatbuffers_sdk::data_objects::KnobT> MiopenReluPlanBuilder::getCustomKnobs(
    [[maybe_unused]] const HipdnnMiopenHandle& handle,
    [[maybe_unused]] const hipdnn_flatbuffers_sdk::flatbuffer_utilities::IGraph& opGraph) const
{
    // ReLU operations do not expose any custom knobs.
    return {};
}

} // namespace miopen_plugin