/*******************************************************************************
 *
 * MIT License
 *
 * Copyright (c) 2024 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 *******************************************************************************/

#include <miopen/datatype.hpp>
#include <miopen/glu.hpp>
#include <miopen/glu/invoke_params.hpp>
#include <miopen/glu/solvers.hpp>
#include <miopen/kernel_build_params.hpp>
#include <miopen/kernel_info.hpp>
#include <miopen/mlo_internal.hpp>
#include <miopen/target_properties.hpp>

#include <cstddef>

#define LOCAL_SIZE 256

namespace miopen {

namespace solver {

namespace glu {

bool GLUBackward::IsApplicable(const ExecutionContext& context,
                               const miopen::glu::ProblemDescription& problem) const
{
    std::ignore = context;

    if(!problem.IsAllContiguous())
        return false;
    if(problem.GetDim() != 0)
        return false;
    if(!(problem.GetInputDesc().GetType() == miopenFloat ||
         problem.GetInputDesc().GetType() == miopenHalf ||
         problem.GetInputDesc().GetType() == miopenBFloat16))
        return false;

    return true;
}

ConvSolution GLUBackward::GetSolution(const ExecutionContext& context,
                                      const miopen::glu::ProblemDescription& problem) const
{
    std::ignore = context;

    auto result = ConvSolution{miopenStatusSuccess};

    auto dtype         = problem.GetInputDesc().GetType();
    auto io_dtype      = miopen::GetDataType(problem.GetInputDesc().GetType());
    auto outgrad_numel = problem.GetOutputGradDesc().GetElementSize();

    size_t xlocalsize = LOCAL_SIZE;
    size_t xgridsize  = AlignUp(outgrad_numel, xlocalsize);
    size_t ylocalsize = 1;
    size_t ygridsize  = 1;
    size_t zlocalsize = 1;
    size_t zgridsize  = 1;

    auto kernel = KernelInfo{};

    kernel.kernel_file = "MIOpenGLU.cpp";
    kernel.kernel_name = "GLUBwdContiguousDim0";

    const auto build_params =
        KernelBuildParameters{{"MIOPEN_USE_FP16", static_cast<int>(dtype == miopenHalf)},
                              {"MIOPEN_USE_FP32", static_cast<int>(dtype == miopenFloat)},
                              {"MIOPEN_USE_FP64", static_cast<int>(dtype == miopenDouble)},
                              {"MIOPEN_USE_BFP16", static_cast<int>(dtype == miopenBFloat16)},
                              {"IO_TYPE", io_dtype == "bfloat16" ? "ushort" : io_dtype}};

    kernel.comp_options = build_params.GenerateFor(kbp::HIP{});

    kernel.l_wk.push_back(xlocalsize);
    kernel.l_wk.push_back(ylocalsize);
    kernel.l_wk.push_back(zlocalsize);

    kernel.g_wk.push_back(xgridsize);
    kernel.g_wk.push_back(ygridsize);
    kernel.g_wk.push_back(zgridsize);

    result.construction_params.push_back(kernel);

    result.invoker_factory = [outgrad_numel](const std::vector<Kernel>& kernels) {
        return [=](const Handle& handle_, const AnyInvokeParams& raw_params) {
            decltype(auto) kernel_ = handle_.Run(kernels.front());
            decltype(auto) params  = raw_params.CastTo<miopen::glu::BwdInvokeParams>();

            kernel_(params.input, params.outputGrad, params.inputGrad, outgrad_numel);
        };
    };

    return result;
}

} // namespace glu

} // namespace solver

} // namespace miopen
