/*! \file */
/* ************************************************************************
 * Copyright (c) 2020-2021 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 "rocsparse_bsrmm.hpp"
#include "rocsparse_csrmm.hpp"

#include "../level2/rocsparse_bsrmv.hpp"

#include "templates.h"
#include "utility.h"
#include <hip/hip_runtime.h>

template <typename T, typename U>
rocsparse_status rocsparse_bsrmm_template_small(rocsparse_handle          handle,
                                                rocsparse_direction       dir,
                                                rocsparse_operation       trans_A,
                                                rocsparse_operation       trans_B,
                                                rocsparse_int             mb,
                                                rocsparse_int             n,
                                                rocsparse_int             kb,
                                                rocsparse_int             nnzb,
                                                U                         alpha,
                                                const rocsparse_mat_descr descr,
                                                const T*                  bsr_val,
                                                const rocsparse_int*      bsr_row_ptr,
                                                const rocsparse_int*      bsr_col_ind,
                                                rocsparse_int             block_dim,
                                                const T*                  B,
                                                rocsparse_int             ldb,
                                                U                         beta,
                                                T*                        C,
                                                rocsparse_int             ldc);

template <typename T, typename U>
rocsparse_status rocsparse_bsrmm_template_large_ext(rocsparse_handle          handle,
                                                    rocsparse_direction       dir,
                                                    rocsparse_operation       trans_A,
                                                    rocsparse_operation       trans_B,
                                                    rocsparse_int             mb,
                                                    rocsparse_int             n,
                                                    rocsparse_int             kb,
                                                    rocsparse_int             nnzb,
                                                    U                         alpha,
                                                    const rocsparse_mat_descr descr,
                                                    const T*                  bsr_val,
                                                    const rocsparse_int*      bsr_row_ptr,
                                                    const rocsparse_int*      bsr_col_ind,
                                                    rocsparse_int             block_dim,
                                                    const T*                  B,
                                                    rocsparse_int             ldb,
                                                    U                         beta,
                                                    T*                        C,
                                                    rocsparse_int             ldc);

template <typename T, typename U>
rocsparse_status rocsparse_bsrmm_template_general(rocsparse_handle          handle,
                                                  rocsparse_direction       dir,
                                                  rocsparse_operation       trans_A,
                                                  rocsparse_operation       trans_B,
                                                  rocsparse_int             mb,
                                                  rocsparse_int             n,
                                                  rocsparse_int             kb,
                                                  rocsparse_int             nnzb,
                                                  U                         alpha,
                                                  const rocsparse_mat_descr descr,
                                                  const T*                  bsr_val,
                                                  const rocsparse_int*      bsr_row_ptr,
                                                  const rocsparse_int*      bsr_col_ind,
                                                  rocsparse_int             block_dim,
                                                  const T*                  B,
                                                  rocsparse_int             ldb,
                                                  U                         beta,
                                                  T*                        C,
                                                  rocsparse_int             ldc);

template <typename T, typename U>
rocsparse_status rocsparse_bsrmm_template_dispatch(rocsparse_handle          handle,
                                                   rocsparse_direction       dir,
                                                   rocsparse_operation       trans_A,
                                                   rocsparse_operation       trans_B,
                                                   rocsparse_int             mb,
                                                   rocsparse_int             n,
                                                   rocsparse_int             kb,
                                                   rocsparse_int             nnzb,
                                                   U                         alpha,
                                                   const rocsparse_mat_descr descr,
                                                   const T*                  bsr_val,
                                                   const rocsparse_int*      bsr_row_ptr,
                                                   const rocsparse_int*      bsr_col_ind,
                                                   rocsparse_int             block_dim,
                                                   const T*                  B,
                                                   rocsparse_int             ldb,
                                                   U                         beta,
                                                   T*                        C,
                                                   rocsparse_int             ldc)
{

    // If n is only 1 and B are non-transposed, then call bsrmv
    if(n == 1)
    {
        if(trans_B == rocsparse_operation_none)
        {
            return rocsparse_bsrmv_template_dispatch(handle,
                                                     dir,
                                                     trans_A,
                                                     mb,
                                                     kb,
                                                     nnzb,
                                                     alpha,
                                                     descr,
                                                     bsr_val,
                                                     bsr_row_ptr,
                                                     bsr_col_ind,
                                                     block_dim,
                                                     B,
                                                     beta,
                                                     C);
        }
    }

    // If block dimension is one we can simply call csrmm
    if(block_dim == 1)
    {
        rocsparse_int nnz = nnzb * block_dim;
        rocsparse_int m   = mb * block_dim;
        rocsparse_int k   = kb * block_dim;

        return rocsparse_csrmm_template_dispatch(handle,
                                                 trans_A,
                                                 trans_B,
                                                 rocsparse_order_column,
                                                 rocsparse_csrmm_alg_default,
                                                 m,
                                                 n,
                                                 k,
                                                 nnz,
                                                 alpha,
                                                 descr,
                                                 bsr_val,
                                                 bsr_row_ptr,
                                                 bsr_col_ind,
                                                 B,
                                                 ldb,
                                                 beta,
                                                 C,
                                                 ldc,
                                                 nullptr);
    }

    if(block_dim == 2)
    {
        return rocsparse_bsrmm_template_small(handle,
                                              dir,
                                              trans_A,
                                              trans_B,
                                              mb,
                                              n,
                                              kb,
                                              nnzb,
                                              alpha,
                                              descr,
                                              bsr_val,
                                              bsr_row_ptr,
                                              bsr_col_ind,
                                              block_dim,
                                              B,
                                              ldb,
                                              beta,
                                              C,
                                              ldc);
    }
    else if(block_dim <= 32)
    {
        return rocsparse_bsrmm_template_large_ext(handle,
                                                  dir,
                                                  trans_A,
                                                  trans_B,
                                                  mb,
                                                  n,
                                                  kb,
                                                  nnzb,
                                                  alpha,
                                                  descr,
                                                  bsr_val,
                                                  bsr_row_ptr,
                                                  bsr_col_ind,
                                                  block_dim,
                                                  B,
                                                  ldb,
                                                  beta,
                                                  C,
                                                  ldc);
    }
    else
    {
        return rocsparse_bsrmm_template_general(handle,
                                                dir,
                                                trans_A,
                                                trans_B,
                                                mb,
                                                n,
                                                kb,
                                                nnzb,
                                                alpha,
                                                descr,
                                                bsr_val,
                                                bsr_row_ptr,
                                                bsr_col_ind,

                                                block_dim,
                                                B,
                                                ldb,
                                                beta,
                                                C,
                                                ldc);
    }
}

template <typename T>
rocsparse_status rocsparse_bsrmm_template(rocsparse_handle          handle,
                                          rocsparse_direction       dir,
                                          rocsparse_operation       trans_A,
                                          rocsparse_operation       trans_B,
                                          rocsparse_int             mb,
                                          rocsparse_int             n,
                                          rocsparse_int             kb,
                                          rocsparse_int             nnzb,
                                          const T*                  alpha,
                                          const rocsparse_mat_descr descr,
                                          const T*                  bsr_val,
                                          const rocsparse_int*      bsr_row_ptr,
                                          const rocsparse_int*      bsr_col_ind,
                                          rocsparse_int             block_dim,
                                          const T*                  B,
                                          rocsparse_int             ldb,
                                          const T*                  beta,
                                          T*                        C,
                                          rocsparse_int             ldc)
{
    // Check for valid handle and matrix descriptor
    if(handle == nullptr)
    {
        return rocsparse_status_invalid_handle;
    }
    else if(descr == nullptr)
    {
        return rocsparse_status_invalid_pointer;
    }

    // Logging TODO bench logging
    log_trace(handle,
              replaceX<T>("rocsparse_Xbsrmm"),
              dir,
              trans_A,
              trans_B,
              mb,
              n,
              kb,
              nnzb,
              LOG_TRACE_SCALAR_VALUE(handle, alpha),
              (const void*&)descr,
              (const void*&)bsr_val,
              (const void*&)bsr_row_ptr,
              (const void*&)bsr_col_ind,
              block_dim,
              (const void*&)B,
              ldb,
              LOG_TRACE_SCALAR_VALUE(handle, beta),
              (const void*&)C,
              ldc);

    if(rocsparse_enum_utils::is_invalid(dir))
    {
        return rocsparse_status_invalid_value;
    }

    if(rocsparse_enum_utils::is_invalid(trans_A))
    {
        return rocsparse_status_invalid_value;
    }

    if(rocsparse_enum_utils::is_invalid(trans_B))
    {
        return rocsparse_status_invalid_value;
    }

    // Check matrix type
    if(descr->type != rocsparse_matrix_type_general)
    {
        // TODO
        return rocsparse_status_not_implemented;
    }

    if(trans_A != rocsparse_operation_none)
    {
        return rocsparse_status_not_implemented;
    }

    if(trans_B != rocsparse_operation_none && trans_B != rocsparse_operation_transpose)
    {
        return rocsparse_status_not_implemented;
    }

    // Check sizes
    if(mb < 0 || n < 0 || kb < 0 || nnzb < 0 || block_dim <= 0)
    {
        return rocsparse_status_invalid_size;
    }

    // Quick return if possible
    if(mb == 0 || n == 0 || kb == 0)
    {
        return rocsparse_status_success;
    }

    // Check pointer arguments
    if(bsr_row_ptr == nullptr || B == nullptr || C == nullptr || alpha == nullptr
       || beta == nullptr)
    {
        return rocsparse_status_invalid_pointer;
    }

    // value arrays and column indices arrays must both be null (zero matrix) or both not null
    if((bsr_val == nullptr && bsr_col_ind != nullptr)
       || (bsr_val != nullptr && bsr_col_ind == nullptr))
    {
        return rocsparse_status_invalid_pointer;
    }

    if(nnzb != 0 && (bsr_val == nullptr && bsr_col_ind == nullptr))
    {
        return rocsparse_status_invalid_pointer;
    }

    static constexpr rocsparse_int s_one = static_cast<rocsparse_int>(1);
    switch(trans_A)
    {
    case rocsparse_operation_none:
    {
        // Check leading dimension of C
        if(ldc < std::max(s_one, mb * block_dim))
        {
            return rocsparse_status_invalid_size;
        }

        // Check leading dimension of B
        switch(trans_B)
        {
        case rocsparse_operation_none:
        {
            if(ldb < std::max(s_one, kb * block_dim))
            {
                return rocsparse_status_invalid_size;
            }
            break;
        }
        case rocsparse_operation_transpose:
        case rocsparse_operation_conjugate_transpose:
        {
            if(ldb < std::max(s_one, n))
            {
                return rocsparse_status_invalid_size;
            }
            break;
        }
        }
        break;
    }
    case rocsparse_operation_transpose:
    case rocsparse_operation_conjugate_transpose:
    {
        // Check leading dimension of C
        if(ldc < std::max(s_one, kb * block_dim))
        {
            return rocsparse_status_invalid_size;
        }

        switch(trans_B)
        {
        case rocsparse_operation_none:
        {
            if(ldb < std::max(s_one, mb * block_dim))
            {
                return rocsparse_status_invalid_size;
            }
            break;
        }
        case rocsparse_operation_transpose:
        case rocsparse_operation_conjugate_transpose:
        {
            if(ldb < std::max(s_one, n))
            {
                return rocsparse_status_invalid_size;
            }
            break;
        }
        }
        break;
    }
    }

    if(handle->pointer_mode == rocsparse_pointer_mode_device)
    {
        return rocsparse_bsrmm_template_dispatch(handle,
                                                 dir,
                                                 trans_A,
                                                 trans_B,
                                                 mb,
                                                 n,
                                                 kb,
                                                 nnzb,
                                                 alpha,
                                                 descr,
                                                 bsr_val,
                                                 bsr_row_ptr,
                                                 bsr_col_ind,
                                                 block_dim,
                                                 B,
                                                 ldb,
                                                 beta,
                                                 C,
                                                 ldc);
    }
    else
    {
        return rocsparse_bsrmm_template_dispatch(handle,
                                                 dir,
                                                 trans_A,
                                                 trans_B,
                                                 mb,
                                                 n,
                                                 kb,
                                                 nnzb,
                                                 *alpha,
                                                 descr,
                                                 bsr_val,
                                                 bsr_row_ptr,
                                                 bsr_col_ind,
                                                 block_dim,
                                                 B,
                                                 ldb,
                                                 *beta,
                                                 C,
                                                 ldc);
    }
}

/*
 * ===========================================================================
 *    C wrapper
 * ===========================================================================
 */
#define C_IMPL(NAME, TYPE)                                                  \
    extern "C" rocsparse_status NAME(rocsparse_handle          handle,      \
                                     rocsparse_direction       dir,         \
                                     rocsparse_operation       trans_A,     \
                                     rocsparse_operation       trans_B,     \
                                     rocsparse_int             mb,          \
                                     rocsparse_int             n,           \
                                     rocsparse_int             kb,          \
                                     rocsparse_int             nnzb,        \
                                     const TYPE*               alpha,       \
                                     const rocsparse_mat_descr descr,       \
                                     const TYPE*               bsr_val,     \
                                     const rocsparse_int*      bsr_row_ptr, \
                                     const rocsparse_int*      bsr_col_ind, \
                                     rocsparse_int             block_dim,   \
                                     const TYPE*               B,           \
                                     rocsparse_int             ldb,         \
                                     const TYPE*               beta,        \
                                     TYPE*                     C,           \
                                     rocsparse_int             ldc)         \
    {                                                                       \
        return rocsparse_bsrmm_template(handle,                             \
                                        dir,                                \
                                        trans_A,                            \
                                        trans_B,                            \
                                        mb,                                 \
                                        n,                                  \
                                        kb,                                 \
                                        nnzb,                               \
                                        alpha,                              \
                                        descr,                              \
                                        bsr_val,                            \
                                        bsr_row_ptr,                        \
                                        bsr_col_ind,                        \
                                        block_dim,                          \
                                        B,                                  \
                                        ldb,                                \
                                        beta,                               \
                                        C,                                  \
                                        ldc);                               \
    }

C_IMPL(rocsparse_sbsrmm, float);
C_IMPL(rocsparse_dbsrmm, double);
C_IMPL(rocsparse_cbsrmm, rocsparse_float_complex);
C_IMPL(rocsparse_zbsrmm, rocsparse_double_complex);
#undef C_IMPL