/*******************************************************************************
 *
 * MIT License
 *
 * Copyright (c) 2023 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
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 * furnished to do so, subject to the following conditions:
 *
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 * copies or substantial portions of the Software.
 *
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#include <miopen/layernorm/problem_description.hpp>
#include <miopen/names.hpp>

#include <sstream>

namespace miopen {

namespace layernorm {

size_t GetStride(const TensorDescriptor& xDesc, int32_t normalized_dim)
{
    size_t stride = 1;
    auto layout   = xDesc.GetLayoutEnum();
    if(normalized_dim > 1 && layout.has_value() &&
       (layout.value() == miopenTensorNHWC || layout.value() == miopenTensorNDHWC))
    {
        stride = xDesc.GetLengths()[1]; // stride = C
    }
    return stride;
}

size_t GetOuterSize(const TensorDescriptor& xDesc, int32_t normalized_dim, size_t stride)
{
    size_t outer_size = 1;
    for(size_t i = 0; i < normalized_dim; ++i)
    {
        if(!(stride > 1 && i == 1))
        {
            outer_size *= xDesc.GetLengths()[i];
        }
    }
    return outer_size;
}

size_t GetInnerSize(const TensorDescriptor& xDesc, int32_t normalized_dim)
{
    size_t inner_size = 1;
    for(size_t i = normalized_dim; i < xDesc.GetLengths().size(); ++i)
    {
        inner_size *= xDesc.GetLengths()[i];
    }
    return inner_size;
}

NetworkConfig ProblemDescription::MakeNetworkConfig() const
{
    std::ostringstream ss;

    ss << "direction" << static_cast<uint64_t>(direction);
    ss << "dtype" << xDesc.GetType();
    ss << "outer_size" << outer_size;
    ss << "inner_size" << inner_size;
    ss << "stride" << stride;
    ss << "mode" << mode;

    if(mode == MIOPEN_WEIGHT_BIAS_FUSED_ADD || mode == MIOPEN_ELEMENTWISE_AFFINE_FUSED_ADD)
    {
        ss << "addlayernorm";
    }
    if(mode == MIOPEN_WEIGHT_BIAS_T5 || mode == MIOPEN_ELEMENTWISE_AFFINE_T5)
    {
        ss << "t5layernorm";
    }

    return NetworkConfig{ss.str()};
}

} // namespace layernorm

} // namespace miopen
