/* ************************************************************************
 * 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_gebsrmv.hpp"
#include "rocsparse.h"
#include "rocsparse_bsrmv.hpp"
#include "rocsparse_csrmv.hpp"

#include "definitions.h"
#include "gebsrmv_device.h"
#include "handle.h"
#include "rocsparse.h"
#include "utility.h"

#include <hip/hip_runtime.h>

template <typename T, typename U>
rocsparse_status rocsparse_gebsrmv_template_row_block_dim_1(rocsparse_handle          handle,
                                                            rocsparse_direction       dir,
                                                            rocsparse_operation       trans,
                                                            rocsparse_int             mb,
                                                            rocsparse_int             nb,
                                                            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             row_block_dim,
                                                            rocsparse_int             col_block_dim,
                                                            const T*                  x,
                                                            U                         beta,
                                                            T*                        y);

template <typename T, typename U>
rocsparse_status rocsparse_gebsrmv_template_row_block_dim_2(rocsparse_handle          handle,
                                                            rocsparse_direction       dir,
                                                            rocsparse_operation       trans,
                                                            rocsparse_int             mb,
                                                            rocsparse_int             nb,
                                                            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             row_block_dim,
                                                            rocsparse_int             col_block_dim,
                                                            const T*                  x,
                                                            U                         beta,
                                                            T*                        y);

template <typename T, typename U>
rocsparse_status rocsparse_gebsrmv_template_row_block_dim_3(rocsparse_handle          handle,
                                                            rocsparse_direction       dir,
                                                            rocsparse_operation       trans,
                                                            rocsparse_int             mb,
                                                            rocsparse_int             nb,
                                                            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             row_block_dim,
                                                            rocsparse_int             col_block_dim,
                                                            const T*                  x,
                                                            U                         beta,
                                                            T*                        y);

template <typename T, typename U>
rocsparse_status rocsparse_gebsrmv_template_row_block_dim_4(rocsparse_handle          handle,
                                                            rocsparse_direction       dir,
                                                            rocsparse_operation       trans,
                                                            rocsparse_int             mb,
                                                            rocsparse_int             nb,
                                                            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             row_block_dim,
                                                            rocsparse_int             col_block_dim,
                                                            const T*                  x,
                                                            U                         beta,
                                                            T*                        y);

template <typename T, typename U>
rocsparse_status rocsparse_gebsrmv_template_row_block_dim_5_8(rocsparse_handle          handle,
                                                              rocsparse_direction       dir,
                                                              rocsparse_operation       trans,
                                                              rocsparse_int             mb,
                                                              rocsparse_int             nb,
                                                              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 row_block_dim,
                                                              rocsparse_int col_block_dim,
                                                              const T*      x,
                                                              U             beta,
                                                              T*            y);

template <typename T, typename U>
rocsparse_status rocsparse_gebsrmv_template_row_block_dim_9_12(rocsparse_handle          handle,
                                                               rocsparse_direction       dir,
                                                               rocsparse_operation       trans,
                                                               rocsparse_int             mb,
                                                               rocsparse_int             nb,
                                                               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        row_block_dim,
                                                               rocsparse_int        col_block_dim,
                                                               const T*             x,
                                                               U                    beta,
                                                               T*                   y);

template <typename T, typename U>
rocsparse_status rocsparse_gebsrmv_template_row_block_dim_13_16(rocsparse_handle          handle,
                                                                rocsparse_direction       dir,
                                                                rocsparse_operation       trans,
                                                                rocsparse_int             mb,
                                                                rocsparse_int             nb,
                                                                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        row_block_dim,
                                                                rocsparse_int        col_block_dim,
                                                                const T*             x,
                                                                U                    beta,
                                                                T*                   y);

template <typename T, typename U>
rocsparse_status rocsparse_gebsrmv_template_row_block_dim_17_inf(rocsparse_handle          handle,
                                                                 rocsparse_direction       dir,
                                                                 rocsparse_operation       trans,
                                                                 rocsparse_int             mb,
                                                                 rocsparse_int             nb,
                                                                 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        row_block_dim,
                                                                 rocsparse_int        col_block_dim,
                                                                 const T*             x,
                                                                 U                    beta,
                                                                 T*                   y);

template <typename... Ts>
rocsparse_status rocsparse_gebsrmv_template_dispatch_specialization(rocsparse_int row_block_dim,
                                                                    Ts&&... ts)
{
    if(row_block_dim == 1)
    {
        return rocsparse_gebsrmv_template_row_block_dim_1(ts...);
    }
    else if(row_block_dim == 2)
    {
        return rocsparse_gebsrmv_template_row_block_dim_2(ts...);
    }
    else if(row_block_dim == 3)
    {
        return rocsparse_gebsrmv_template_row_block_dim_3(ts...);
    }
    else if(row_block_dim == 4)
    {
        return rocsparse_gebsrmv_template_row_block_dim_4(ts...);
    }
    else if(row_block_dim <= 8)
    {
        return rocsparse_gebsrmv_template_row_block_dim_5_8(ts...);
    }
    else if(row_block_dim <= 12)
    {
        return rocsparse_gebsrmv_template_row_block_dim_9_12(ts...);
    }
    else if(row_block_dim <= 16)
    {
        return rocsparse_gebsrmv_template_row_block_dim_13_16(ts...);
    }
    else
    {
        return rocsparse_gebsrmv_template_row_block_dim_17_inf(ts...);
    }
}

template <typename T, typename U>
rocsparse_status rocsparse_gebsrmv_template_dispatch(rocsparse_handle          handle,
                                                     rocsparse_direction       dir,
                                                     rocsparse_operation       trans,
                                                     rocsparse_int             mb,
                                                     rocsparse_int             nb,
                                                     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             row_block_dim,
                                                     rocsparse_int             col_block_dim,
                                                     const T*                  x,
                                                     U                         beta,
                                                     T*                        y)
{

    // row_block_dim == col_block_dim is the BSR case
    if(row_block_dim == col_block_dim)
    {
        RETURN_IF_ROCSPARSE_ERROR(rocsparse_bsrmv_template_dispatch(handle,
                                                                    dir,
                                                                    trans,
                                                                    mb,
                                                                    nb,
                                                                    nnzb,
                                                                    alpha,
                                                                    descr,
                                                                    bsr_val,
                                                                    bsr_row_ptr,
                                                                    bsr_col_ind,
                                                                    row_block_dim,
                                                                    x,
                                                                    beta,
                                                                    y));

        return rocsparse_status_success;
    }

    RETURN_IF_ROCSPARSE_ERROR(rocsparse_gebsrmv_template_dispatch_specialization(row_block_dim,
                                                                                 //
                                                                                 handle,
                                                                                 dir,
                                                                                 trans,
                                                                                 mb,
                                                                                 nb,
                                                                                 nnzb,
                                                                                 alpha,
                                                                                 descr,
                                                                                 bsr_val,
                                                                                 bsr_row_ptr,
                                                                                 bsr_col_ind,
                                                                                 row_block_dim,
                                                                                 col_block_dim,
                                                                                 x,
                                                                                 beta,
                                                                                 y));
    return rocsparse_status_success;
}

template <typename T>
rocsparse_status rocsparse_gebsrmv_template(rocsparse_handle          handle,
                                            rocsparse_direction       dir,
                                            rocsparse_operation       trans,
                                            rocsparse_int             mb,
                                            rocsparse_int             nb,
                                            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             row_block_dim,
                                            rocsparse_int             col_block_dim,
                                            const T*                  x,
                                            const T*                  beta,
                                            T*                        y)
{
    // 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
    log_trace(handle,
              replaceX<T>("rocsparse_Xgebsrmv"),
              dir,
              trans,
              mb,
              nb,
              nnzb,
              LOG_TRACE_SCALAR_VALUE(handle, alpha),
              (const void*&)descr,
              (const void*&)bsr_val,
              (const void*&)bsr_row_ptr,
              (const void*&)bsr_col_ind,
              row_block_dim,
              col_block_dim,
              (const void*&)x,
              LOG_TRACE_SCALAR_VALUE(handle, beta),
              (const void*&)y);

    log_bench(handle,
              "./rocsparse-bench -f gebsrmv -r",
              replaceX<T>("X"),
              "--mtx <matrix.mtx> "
              "--rblockdim",
              row_block_dim,
              "--cblockdim",
              col_block_dim,
              "--alpha",
              LOG_BENCH_SCALAR_VALUE(handle, alpha),
              "--beta",
              LOG_BENCH_SCALAR_VALUE(handle, beta));

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

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

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

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

    // Check sizes
    if(mb < 0 || nb < 0 || nnzb < 0 || row_block_dim < 0 || col_block_dim < 0)
    {
        return rocsparse_status_invalid_size;
    }

    // Quick return if possible
    if(mb == 0 || nb == 0 || row_block_dim == 0 || col_block_dim == 0)
    {
        return rocsparse_status_success;
    }

    // Check pointer arguments
    if(bsr_row_ptr == nullptr || x == nullptr || y == 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;
    }

    // row_block_dim == 1 and col_block_dim == 1 is the CSR case
    if(row_block_dim == 1 && col_block_dim == 1)
    {
        RETURN_IF_ROCSPARSE_ERROR(rocsparse_csrmv_template(handle,
                                                           trans,
                                                           mb,
                                                           nb,
                                                           nnzb,
                                                           alpha,
                                                           descr,
                                                           bsr_val,
                                                           bsr_row_ptr,
                                                           bsr_col_ind,
                                                           nullptr,
                                                           x,
                                                           beta,
                                                           y));

        return rocsparse_status_success;
    }

    // Run different gebsrmv kernels
    if(handle->pointer_mode == rocsparse_pointer_mode_device)
    {
        return rocsparse_gebsrmv_template_dispatch(handle,
                                                   dir,
                                                   trans,
                                                   mb,
                                                   nb,
                                                   nnzb,
                                                   alpha,
                                                   descr,
                                                   bsr_val,
                                                   bsr_row_ptr,
                                                   bsr_col_ind,
                                                   row_block_dim,
                                                   col_block_dim,
                                                   x,
                                                   beta,
                                                   y);
    }
    else
    {
        return rocsparse_gebsrmv_template_dispatch(handle,
                                                   dir,
                                                   trans,
                                                   mb,
                                                   nb,
                                                   nnzb,
                                                   *alpha,
                                                   descr,
                                                   bsr_val,
                                                   bsr_row_ptr,
                                                   bsr_col_ind,
                                                   row_block_dim,
                                                   col_block_dim,
                                                   x,
                                                   *beta,
                                                   y);
    }
    return rocsparse_status_success;
}

/*
 * ===========================================================================
 *    C wrapper
 * ===========================================================================
 */
#define C_IMPL(NAME, TYPE)                                                    \
    extern "C" rocsparse_status NAME(rocsparse_handle          handle,        \
                                     rocsparse_direction       dir,           \
                                     rocsparse_operation       trans,         \
                                     rocsparse_int             mb,            \
                                     rocsparse_int             nb,            \
                                     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             row_block_dim, \
                                     rocsparse_int             col_block_dim, \
                                     const TYPE*               x,             \
                                     const TYPE*               beta,          \
                                     TYPE*                     y)             \
    {                                                                         \
        return rocsparse_gebsrmv_template(handle,                             \
                                          dir,                                \
                                          trans,                              \
                                          mb,                                 \
                                          nb,                                 \
                                          nnzb,                               \
                                          alpha,                              \
                                          descr,                              \
                                          bsr_val,                            \
                                          bsr_row_ptr,                        \
                                          bsr_col_ind,                        \
                                          row_block_dim,                      \
                                          col_block_dim,                      \
                                          x,                                  \
                                          beta,                               \
                                          y);                                 \
    }

C_IMPL(rocsparse_sgebsrmv, float);
C_IMPL(rocsparse_dgebsrmv, double);
C_IMPL(rocsparse_cgebsrmv, rocsparse_float_complex);
C_IMPL(rocsparse_zgebsrmv, rocsparse_double_complex);

#undef C_IMPL