/*! \file */
/* ************************************************************************
 * Copyright (C) 2025 Advanced Micro Devices, Inc. All rights Reserved.
 *
 * 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 "rocsparse_csrmm.hpp"
#include "rocsparse_enum_utils.hpp"
#include "rocsparse_utility.hpp"

#include <map>
#include <sstream>

namespace rocsparse
{
    typedef rocsparse_status (*csrmm_buffer_size_t)(rocsparse_handle          handle,
                                                    rocsparse_operation       trans_A,
                                                    rocsparse_csrmm_alg       alg,
                                                    int64_t                   m,
                                                    int64_t                   n,
                                                    int64_t                   k,
                                                    int64_t                   nnz,
                                                    const rocsparse_mat_descr descr,
                                                    const void*               csr_val,
                                                    const void*               csr_row_ptr,
                                                    const void*               csr_col_ind,
                                                    size_t*                   buffer_size);

    using csrmm_buffer_size_tuple = std::
        tuple<rocsparse_datatype, rocsparse_indextype, rocsparse_indextype, rocsparse_datatype>;

    // clang-format off
#define CSRMM_BUFFER_SIZE_CONFIG(T, I, J, A)                                      \
    {                                                                       \
        csrmm_buffer_size_tuple(T, I, J, A),                                      \
            csrmm_buffer_size_template<typename rocsparse::datatype_traits<T>::type_t,  \
                           typename rocsparse::indextype_traits<I>::type_t, \
                           typename rocsparse::indextype_traits<J>::type_t, \
                           typename rocsparse::datatype_traits<A>::type_t>  \
    }
    // clang-format on

    static const std::map<csrmm_buffer_size_tuple, csrmm_buffer_size_t>
        s_csrmm_buffer_size_dispatch{{// Uniform precisions
                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_r,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_f32_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_r,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_f32_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_r,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_datatype_f32_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f64_r,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_f64_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f64_r,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_f64_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f64_r,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_datatype_f64_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_c,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_f32_c),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_c,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_f32_c),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_c,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_datatype_f32_c),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f64_c,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_f64_c),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f64_c,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_f64_c),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f64_c,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_datatype_f64_c),

                                      // Mixed precisions
                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_i32_r,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_i8_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_i32_r,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_i8_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_i32_r,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_datatype_i8_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_r,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_f16_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_r,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_f16_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_r,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_datatype_f16_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_r,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_i8_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_r,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_i8_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_r,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_datatype_i8_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_r,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_bf16_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_r,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i32,
                                                               rocsparse_datatype_bf16_r),

                                      CSRMM_BUFFER_SIZE_CONFIG(rocsparse_datatype_f32_r,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_indextype_i64,
                                                               rocsparse_datatype_bf16_r)}};

    static rocsparse_status csrmm_buffer_size_find(csrmm_buffer_size_t* function_,
                                                   rocsparse_datatype   t_type_,
                                                   rocsparse_indextype  i_type_,
                                                   rocsparse_indextype  j_type_,
                                                   rocsparse_datatype   a_type_)
    {
        const auto& it = rocsparse::s_csrmm_buffer_size_dispatch.find(
            rocsparse::csrmm_buffer_size_tuple(t_type_, i_type_, j_type_, a_type_));

        if(it != rocsparse::s_csrmm_buffer_size_dispatch.end())
        {
            function_[0] = it->second;
        }
        // LCOV_EXCL_START
        else
        {
#ifndef NDEBUG
            std::cout << "invalid precision configuration: "
                      << "t_type: " << rocsparse::enum_utils::to_string(t_type_) << std::endl
                      << ", i_type: " << rocsparse::enum_utils::to_string(i_type_) << std::endl
                      << ", j_type: " << rocsparse::enum_utils::to_string(j_type_) << std::endl
                      << ", a_type: " << rocsparse::enum_utils::to_string(a_type_) << std::endl;

            std::cout << "available configuration are: " << std::endl;
            for(const auto& p : rocsparse::s_csrmm_buffer_size_dispatch)
            {
                const auto& t      = p.first;
                const auto  t_type = std::get<0>(t);
                const auto  i_type = std::get<1>(t);
                const auto  j_type = std::get<2>(t);
                const auto  a_type = std::get<3>(t);
                std::cout << std::endl
                          << std::endl
                          << "t_type: " << rocsparse::enum_utils::to_string(t_type) << std::endl
                          << ", i_type: " << rocsparse::enum_utils::to_string(i_type) << std::endl
                          << ", j_type: " << rocsparse::enum_utils::to_string(j_type) << std::endl
                          << ", a_type: " << rocsparse::enum_utils::to_string(a_type) << std::endl;
            }
#endif

            std::stringstream sstr;
            sstr << "invalid precision configuration: "
                 << "t_type: " << rocsparse::enum_utils::to_string(t_type_)
                 << ", i_type: " << rocsparse::enum_utils::to_string(i_type_)
                 << ", j_type: " << rocsparse::enum_utils::to_string(j_type_)
                 << ", a_type: " << rocsparse::enum_utils::to_string(a_type_);

            RETURN_WITH_MESSAGE_IF_ROCSPARSE_ERROR(rocsparse_status_invalid_value,
                                                   sstr.str().c_str());
        }
        // LCOV_EXCL_STOP

        return rocsparse_status_success;
    }
}

rocsparse_status rocsparse::csrmm_buffer_size(rocsparse_handle          handle,
                                              rocsparse_operation       trans_A,
                                              rocsparse_csrmm_alg       alg,
                                              int64_t                   m,
                                              int64_t                   n,
                                              int64_t                   k,
                                              int64_t                   nnz,
                                              const rocsparse_mat_descr descr,
                                              rocsparse_datatype        compute_datatype,
                                              rocsparse_datatype        csr_val_datatype,
                                              const void*               csr_val,
                                              rocsparse_indextype       csr_row_ptr_indextype,
                                              const void*               csr_row_ptr,
                                              rocsparse_indextype       csr_col_ind_indextype,
                                              const void*               csr_col_ind,
                                              size_t*                   buffer_size)
{

    ROCSPARSE_ROUTINE_TRACE;
    rocsparse::csrmm_buffer_size_t f;
    RETURN_IF_ROCSPARSE_ERROR(rocsparse::csrmm_buffer_size_find(
        &f, compute_datatype, csr_row_ptr_indextype, csr_col_ind_indextype, csr_val_datatype));

    RETURN_IF_ROCSPARSE_ERROR(f(
        handle, trans_A, alg, m, n, k, nnz, descr, csr_val, csr_row_ptr, csr_col_ind, buffer_size));

    return rocsparse_status_success;
}
