/*! \file */
/* ************************************************************************
 * Copyright (C) 2020-2023 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 "internal/precond/rocsparse_bsrilu0.h"
#include "internal/level2/rocsparse_csrsv.h"

#include "rocsparse_bsrilu0.hpp"

#include "../level2/rocsparse_csrsv.hpp"
#include "bsrilu0_device.h"
#include "definitions.h"
#include "utility.h"

#define LAUNCH_BSRILU28()                                                               \
    THROW_IF_HIPLAUNCHKERNELGGL_ERROR((bsrilu0_2_8<64, 64, 8>),                         \
                                      dim3(mb),                                         \
                                      dim3(8, 8),                                       \
                                      0,                                                \
                                      handle->stream,                                   \
                                      dir,                                              \
                                      mb,                                               \
                                      bsr_row_ptr,                                      \
                                      bsr_col_ind,                                      \
                                      bsr_val,                                          \
                                      (rocsparse_int*)info->bsrilu0_info->trm_diag_ind, \
                                      block_dim,                                        \
                                      done_array,                                       \
                                      (rocsparse_int*)info->bsrilu0_info->row_map,      \
                                      (rocsparse_int*)info->zero_pivot,                 \
                                      base,                                             \
                                      info->boost_enable,                               \
                                      boost_tol_device_host,                            \
                                      boost_val_device_host)

#define LAUNCH_BSRILU932(dim)                                                           \
    THROW_IF_HIPLAUNCHKERNELGGL_ERROR((bsrilu0_9_32<64, 64, dim>),                      \
                                      dim3(mb),                                         \
                                      dim3(dim, 64 / dim),                              \
                                      0,                                                \
                                      handle->stream,                                   \
                                      dir,                                              \
                                      mb,                                               \
                                      bsr_row_ptr,                                      \
                                      bsr_col_ind,                                      \
                                      bsr_val,                                          \
                                      (rocsparse_int*)info->bsrilu0_info->trm_diag_ind, \
                                      block_dim,                                        \
                                      done_array,                                       \
                                      (rocsparse_int*)info->bsrilu0_info->row_map,      \
                                      (rocsparse_int*)info->zero_pivot,                 \
                                      base,                                             \
                                      info->boost_enable,                               \
                                      boost_tol_device_host,                            \
                                      boost_val_device_host)

#define LAUNCH_BSRILU3364()                                                             \
    THROW_IF_HIPLAUNCHKERNELGGL_ERROR((bsrilu0_33_64<64, 64, 64>),                      \
                                      dim3(mb),                                         \
                                      dim3(64),                                         \
                                      0,                                                \
                                      handle->stream,                                   \
                                      dir,                                              \
                                      mb,                                               \
                                      bsr_row_ptr,                                      \
                                      bsr_col_ind,                                      \
                                      bsr_val,                                          \
                                      (rocsparse_int*)info->bsrilu0_info->trm_diag_ind, \
                                      block_dim,                                        \
                                      done_array,                                       \
                                      (rocsparse_int*)info->bsrilu0_info->row_map,      \
                                      (rocsparse_int*)info->zero_pivot,                 \
                                      base,                                             \
                                      info->boost_enable,                               \
                                      boost_tol_device_host,                            \
                                      boost_val_device_host)

#define LAUNCH_BSRILU65inf(sleep, wfsize)                                               \
    THROW_IF_HIPLAUNCHKERNELGGL_ERROR((bsrilu0_general<128, wfsize, sleep>),            \
                                      dim3((wfsize * mb - 1) / 128 + 1),                \
                                      dim3(128),                                        \
                                      0,                                                \
                                      handle->stream,                                   \
                                      dir,                                              \
                                      mb,                                               \
                                      bsr_row_ptr,                                      \
                                      bsr_col_ind,                                      \
                                      bsr_val,                                          \
                                      (rocsparse_int*)info->bsrilu0_info->trm_diag_ind, \
                                      block_dim,                                        \
                                      done_array,                                       \
                                      (rocsparse_int*)info->bsrilu0_info->row_map,      \
                                      (rocsparse_int*)info->zero_pivot,                 \
                                      base,                                             \
                                      info->boost_enable,                               \
                                      boost_tol_device_host,                            \
                                      boost_val_device_host)

template <typename T, typename U>
rocsparse_status rocsparse_bsrilu0_numeric_boost_template(rocsparse_handle   handle,
                                                          rocsparse_mat_info info,
                                                          int                enable_boost,
                                                          const U*           boost_tol,
                                                          const T*           boost_val)
{
    ROCSPARSE_CHECKARG_HANDLE(0, handle);

    log_trace(handle,
              replaceX<T>("rocsparse_Xbsrilu0_numeric_boost"),
              (const void*&)info,
              enable_boost,
              (const void*&)boost_tol,
              (const void*&)boost_val);

    ROCSPARSE_CHECKARG_POINTER(1, info);

    // Reset boost
    info->boost_enable        = 0;
    info->use_double_prec_tol = 0;

    if(enable_boost)
    {
        ROCSPARSE_CHECKARG_POINTER(3, boost_tol);
        ROCSPARSE_CHECKARG_POINTER(4, boost_val);

        info->boost_enable        = enable_boost;
        info->use_double_prec_tol = std::is_same<U, double>();
        info->boost_tol           = reinterpret_cast<const void*>(boost_tol);
        info->boost_val           = reinterpret_cast<const void*>(boost_val);
    }

    return rocsparse_status_success;
}

template <typename T>
rocsparse_status rocsparse_bsrilu0_analysis_template(rocsparse_handle          handle, //0
                                                     rocsparse_direction       dir, //1
                                                     rocsparse_int             mb, //2
                                                     rocsparse_int             nnzb, //3
                                                     const rocsparse_mat_descr descr, //4
                                                     const T*                  bsr_val, //5
                                                     const rocsparse_int*      bsr_row_ptr, //6
                                                     const rocsparse_int*      bsr_col_ind, //7
                                                     rocsparse_int             block_dim, //8
                                                     rocsparse_mat_info        info, //9
                                                     rocsparse_analysis_policy analysis, //10
                                                     rocsparse_solve_policy    solve, //11
                                                     void*                     temp_buffer) //12
{
    ROCSPARSE_CHECKARG_HANDLE(0, handle);

    // Logging
    log_trace(handle,
              replaceX<T>("rocsparse_Xbsrilu0_analysis"),
              dir,
              mb,
              nnzb,
              (const void*&)descr,
              (const void*&)bsr_val,
              (const void*&)bsr_row_ptr,
              (const void*&)bsr_col_ind,
              block_dim,
              (const void*&)info,
              solve,
              analysis);

    ROCSPARSE_CHECKARG_ENUM(1, dir);
    ROCSPARSE_CHECKARG_SIZE(2, mb);
    ROCSPARSE_CHECKARG_SIZE(3, nnzb);
    ROCSPARSE_CHECKARG_POINTER(4, descr);
    ROCSPARSE_CHECKARG(
        4, descr, (descr->type != rocsparse_matrix_type_general), rocsparse_status_not_implemented);
    ROCSPARSE_CHECKARG(4,
                       descr,
                       (descr->storage_mode != rocsparse_storage_mode_sorted),
                       rocsparse_status_requires_sorted_storage);
    ROCSPARSE_CHECKARG_ARRAY(5, nnzb, bsr_val);
    ROCSPARSE_CHECKARG_ARRAY(6, mb, bsr_row_ptr);
    ROCSPARSE_CHECKARG_ARRAY(7, nnzb, bsr_col_ind);
    ROCSPARSE_CHECKARG_SIZE(8, block_dim);
    ROCSPARSE_CHECKARG(8, block_dim, (block_dim == 0), rocsparse_status_invalid_size);
    ROCSPARSE_CHECKARG_POINTER(9, info);
    ROCSPARSE_CHECKARG_ENUM(10, analysis);
    ROCSPARSE_CHECKARG_ENUM(11, solve);
    ROCSPARSE_CHECKARG_ARRAY(12, mb, temp_buffer);

    if(mb == 0)
    {
        return rocsparse_status_success;
    }

    // Differentiate the analysis policies
    if(analysis == rocsparse_analysis_policy_reuse)
    {
        // We try to re-use already analyzed lower part, if available.
        // It is the user's responsibility that this data is still valid,
        // since he passed the 'reuse' flag.

        // If bsrilu0 meta data is already available, do nothing
        if(info->bsrilu0_info != nullptr)
        {
            return rocsparse_status_success;
        }

        // Check for other lower analysis meta data
        if(info->bsric0_info != nullptr)
        {
            // bsric0 meta data
            info->bsric0_info = info->bsrilu0_info;
            return rocsparse_status_success;
        }

        if(info->bsrsv_lower_info != nullptr)
        {
            // bsrsv meta data
            info->bsrilu0_info = info->bsrsv_lower_info;
            return rocsparse_status_success;
        }
    }

    // User is explicitly asking to force a re-analysis, or no valid data has been
    // found to be re-used.

    // Clear bsrilu0 info
    RETURN_IF_ROCSPARSE_ERROR(rocsparse_destroy_trm_info(info->bsrilu0_info));

    // Create bsrilu0 info
    RETURN_IF_ROCSPARSE_ERROR(rocsparse_create_trm_info(&info->bsrilu0_info));

    // Perform analysis
    RETURN_IF_ROCSPARSE_ERROR(rocsparse_trm_analysis(handle,
                                                     rocsparse_operation_none,
                                                     mb,
                                                     nnzb,
                                                     descr,
                                                     bsr_val,
                                                     bsr_row_ptr,
                                                     bsr_col_ind,
                                                     info->bsrilu0_info,
                                                     (rocsparse_int**)&info->zero_pivot,
                                                     temp_buffer));

    return rocsparse_status_success;
}

template <unsigned int BLOCKSIZE,
          unsigned int WFSIZE,
          unsigned int BSRDIM,
          typename T,
          typename U,
          typename V>
ROCSPARSE_KERNEL(BLOCKSIZE)
void bsrilu0_2_8(rocsparse_direction  dir,
                 rocsparse_int        mb,
                 const rocsparse_int* bsr_row_ptr,
                 const rocsparse_int* bsr_col_ind,
                 T*                   bsr_val,
                 const rocsparse_int* bsr_diag_ind,
                 rocsparse_int        bsr_dim,
                 int*                 done_array,
                 const rocsparse_int* map,
                 rocsparse_int*       zero_pivot,
                 rocsparse_index_base idx_base,
                 int                  enable_boost,
                 U                    boost_tol_device_host,
                 V                    boost_val_device_host)
{

    auto boost_tol = (enable_boost) ? load_scalar_device_host(boost_tol_device_host)
                                    : zero_scalar_device_host(boost_tol_device_host);

    auto boost_val = (enable_boost) ? load_scalar_device_host(boost_val_device_host)
                                    : zero_scalar_device_host(boost_val_device_host);

    bsrilu0_2_8_device<BLOCKSIZE, WFSIZE, BSRDIM>(dir,
                                                  mb,
                                                  bsr_row_ptr,
                                                  bsr_col_ind,
                                                  bsr_val,
                                                  bsr_diag_ind,
                                                  bsr_dim,
                                                  done_array,
                                                  map,
                                                  zero_pivot,
                                                  idx_base,
                                                  enable_boost,
                                                  boost_tol,
                                                  boost_val);
}

template <unsigned int BLOCKSIZE,
          unsigned int WFSIZE,
          unsigned int BSRDIM,
          typename T,
          typename U,
          typename V>
ROCSPARSE_KERNEL(BLOCKSIZE)
void bsrilu0_9_32(rocsparse_direction  dir,
                  rocsparse_int        mb,
                  const rocsparse_int* bsr_row_ptr,
                  const rocsparse_int* bsr_col_ind,
                  T*                   bsr_val,
                  const rocsparse_int* bsr_diag_ind,
                  rocsparse_int        bsr_dim,
                  int*                 done_array,
                  const rocsparse_int* map,
                  rocsparse_int*       zero_pivot,
                  rocsparse_index_base idx_base,
                  int                  enable_boost,
                  U                    boost_tol_device_host,
                  V                    boost_val_device_host)
{
    auto boost_tol = (enable_boost) ? load_scalar_device_host(boost_tol_device_host)
                                    : zero_scalar_device_host(boost_tol_device_host);

    auto boost_val = (enable_boost) ? load_scalar_device_host(boost_val_device_host)
                                    : zero_scalar_device_host(boost_val_device_host);

    bsrilu0_9_32_device<BLOCKSIZE, WFSIZE, BSRDIM>(dir,
                                                   mb,
                                                   bsr_row_ptr,
                                                   bsr_col_ind,
                                                   bsr_val,
                                                   bsr_diag_ind,
                                                   bsr_dim,
                                                   done_array,
                                                   map,
                                                   zero_pivot,
                                                   idx_base,
                                                   enable_boost,
                                                   boost_tol,
                                                   boost_val);
}

template <unsigned int BLOCKSIZE,
          unsigned int WFSIZE,
          unsigned int BSRDIM,
          typename T,
          typename U,
          typename V>
ROCSPARSE_KERNEL(BLOCKSIZE)
void bsrilu0_33_64(rocsparse_direction  dir,
                   rocsparse_int        mb,
                   const rocsparse_int* bsr_row_ptr,
                   const rocsparse_int* bsr_col_ind,
                   T*                   bsr_val,
                   const rocsparse_int* bsr_diag_ind,
                   rocsparse_int        bsr_dim,
                   int*                 done_array,
                   const rocsparse_int* map,
                   rocsparse_int*       zero_pivot,
                   rocsparse_index_base idx_base,
                   int                  enable_boost,
                   U                    boost_tol_device_host,
                   V                    boost_val_device_host)
{
    auto boost_tol = (enable_boost) ? load_scalar_device_host(boost_tol_device_host)
                                    : zero_scalar_device_host(boost_tol_device_host);

    auto boost_val = (enable_boost) ? load_scalar_device_host(boost_val_device_host)
                                    : zero_scalar_device_host(boost_val_device_host);

    bsrilu0_33_64_device<BLOCKSIZE, WFSIZE, BSRDIM>(dir,
                                                    mb,
                                                    bsr_row_ptr,
                                                    bsr_col_ind,
                                                    bsr_val,
                                                    bsr_diag_ind,
                                                    bsr_dim,
                                                    done_array,
                                                    map,
                                                    zero_pivot,
                                                    idx_base,
                                                    enable_boost,
                                                    boost_tol,
                                                    boost_val);
}

template <unsigned int BLOCKSIZE,
          unsigned int WFSIZE,
          bool         SLEEP,
          typename T,
          typename U,
          typename V>
ROCSPARSE_KERNEL(BLOCKSIZE)
void bsrilu0_general(rocsparse_direction  dir,
                     rocsparse_int        mb,
                     const rocsparse_int* bsr_row_ptr,
                     const rocsparse_int* bsr_col_ind,
                     T*                   bsr_val,
                     const rocsparse_int* bsr_diag_ind,
                     rocsparse_int        bsr_dim,
                     int*                 done_array,
                     const rocsparse_int* map,
                     rocsparse_int*       zero_pivot,
                     rocsparse_index_base idx_base,
                     int                  enable_boost,
                     U                    boost_tol_device_host,
                     V                    boost_val_device_host)
{
    auto boost_tol = (enable_boost) ? load_scalar_device_host(boost_tol_device_host)
                                    : zero_scalar_device_host(boost_tol_device_host);

    auto boost_val = (enable_boost) ? load_scalar_device_host(boost_val_device_host)
                                    : zero_scalar_device_host(boost_val_device_host);

    bsrilu0_general_device<BLOCKSIZE, WFSIZE, SLEEP>(dir,
                                                     mb,
                                                     bsr_row_ptr,
                                                     bsr_col_ind,
                                                     bsr_val,
                                                     bsr_diag_ind,
                                                     bsr_dim,
                                                     done_array,
                                                     map,
                                                     zero_pivot,
                                                     idx_base,
                                                     enable_boost,
                                                     boost_tol,
                                                     boost_val);
}

template <typename T,
          typename U,
          typename V,
          typename std::enable_if<std::is_same<T, float>::value || std::is_same<T, double>::value
                                      || std::is_same<T, rocsparse_float_complex>::value,
                                  int>::type
          = 0>
inline void bsrilu0_launcher(rocsparse_handle     handle,
                             rocsparse_direction  dir,
                             rocsparse_int        mb,
                             rocsparse_index_base base,
                             T*                   bsr_val,
                             const rocsparse_int* bsr_row_ptr,
                             const rocsparse_int* bsr_col_ind,
                             rocsparse_int        block_dim,
                             rocsparse_mat_info   info,
                             int*                 done_array,
                             U                    boost_tol_device_host,
                             V                    boost_val_device_host)
{
    const std::string gcn_arch_name = rocsparse_handle_get_arch_name(handle);
    if(gcn_arch_name == rocpsarse_arch_names::gfx908 && handle->asic_rev < 2)
    {
        LAUNCH_BSRILU65inf(true, 64);
    }
    else if(handle->wavefront_size == 32)
    {
        LAUNCH_BSRILU65inf(false, 32);
    }
    else
    {
        if(block_dim <= 8)
        {
            LAUNCH_BSRILU28();
        }
        else if(block_dim <= 16)
        {
            LAUNCH_BSRILU932(16);
        }
        else if(block_dim <= 32)
        {
            LAUNCH_BSRILU932(32);
        }
        else if(block_dim <= 64)
        {
            LAUNCH_BSRILU3364();
        }
        else
        {
            LAUNCH_BSRILU65inf(false, 64);
        }
    }
}

template <typename T,
          typename U,
          typename V,
          typename std::enable_if<std::is_same<T, rocsparse_double_complex>::value, int>::type = 0>
inline void bsrilu0_launcher(rocsparse_handle     handle,
                             rocsparse_direction  dir,
                             rocsparse_int        mb,
                             rocsparse_index_base base,
                             T*                   bsr_val,
                             const rocsparse_int* bsr_row_ptr,
                             const rocsparse_int* bsr_col_ind,
                             rocsparse_int        block_dim,
                             rocsparse_mat_info   info,
                             int*                 done_array,
                             U                    boost_tol_device_host,
                             V                    boost_val_device_host)
{

    const std::string gcn_arch_name = rocsparse_handle_get_arch_name(handle);
    if(gcn_arch_name == rocpsarse_arch_names::gfx908 && handle->asic_rev < 2)
    {
        LAUNCH_BSRILU65inf(true, 64);
    }
    else if(handle->wavefront_size == 32)
    {
        LAUNCH_BSRILU65inf(false, 32);
    }
    else
    {
        if(block_dim <= 8)
        {
            LAUNCH_BSRILU28();
        }
        else if(block_dim <= 16)
        {
            LAUNCH_BSRILU932(16);
        }
        else if(block_dim <= 32)
        {
            LAUNCH_BSRILU932(32);
        }
        else
        {
            LAUNCH_BSRILU65inf(false, 64);
        }
    }
}

template <typename T, typename U>
rocsparse_status rocsparse_bsrilu0_template(rocsparse_handle          handle,
                                            rocsparse_direction       dir,
                                            rocsparse_int             mb,
                                            rocsparse_int             nnzb,
                                            const rocsparse_mat_descr descr,
                                            T*                        bsr_val,
                                            const rocsparse_int*      bsr_row_ptr,
                                            const rocsparse_int*      bsr_col_ind,
                                            rocsparse_int             block_dim,
                                            rocsparse_mat_info        info,
                                            rocsparse_solve_policy    policy,
                                            void*                     temp_buffer)
{

    ROCSPARSE_CHECKARG_HANDLE(0, handle);

    log_trace(handle,
              replaceX<T>("rocsparse_Xbsrilu0"),
              mb,
              nnzb,
              (const void*&)descr,
              (const void*&)bsr_val,
              (const void*&)bsr_row_ptr,
              (const void*&)bsr_col_ind,
              block_dim,
              (const void*&)info,
              policy,
              (const void*&)temp_buffer);

    ROCSPARSE_CHECKARG_ENUM(1, dir);
    ROCSPARSE_CHECKARG_SIZE(2, mb);
    ROCSPARSE_CHECKARG_SIZE(3, nnzb);
    ROCSPARSE_CHECKARG_POINTER(4, descr);
    ROCSPARSE_CHECKARG(
        4, descr, (descr->type != rocsparse_matrix_type_general), rocsparse_status_not_implemented);
    ROCSPARSE_CHECKARG(4,
                       descr,
                       (descr->storage_mode != rocsparse_storage_mode_sorted),
                       rocsparse_status_requires_sorted_storage);
    ROCSPARSE_CHECKARG_ARRAY(5, nnzb, bsr_val);
    ROCSPARSE_CHECKARG_ARRAY(6, mb, bsr_row_ptr);
    ROCSPARSE_CHECKARG_ARRAY(7, nnzb, bsr_col_ind);
    ROCSPARSE_CHECKARG_SIZE(8, block_dim);
    ROCSPARSE_CHECKARG(8, block_dim, (block_dim == 0), rocsparse_status_invalid_size);
    ROCSPARSE_CHECKARG_POINTER(9, info);
    ROCSPARSE_CHECKARG_ENUM(10, policy);
    ROCSPARSE_CHECKARG_ARRAY(11, mb, temp_buffer);

    ROCSPARSE_CHECKARG(
        9, info, ((mb > 0) && (info->bsrilu0_info == nullptr)), rocsparse_status_invalid_pointer);

    if(mb == 0)
    {
        return rocsparse_status_success;
    }

    // Stream
    hipStream_t stream = handle->stream;

    // Buffer
    char* ptr = reinterpret_cast<char*>(temp_buffer);
    ptr += 256;

    // done array
    int* done_array = reinterpret_cast<int*>(ptr);

    // Initialize buffers
    RETURN_IF_HIP_ERROR(hipMemsetAsync(done_array, 0, sizeof(int) * mb, stream));

    if(handle->pointer_mode == rocsparse_pointer_mode_device)
    {
        bsrilu0_launcher(handle,
                         dir,
                         mb,
                         descr->base,
                         bsr_val,
                         bsr_row_ptr,
                         bsr_col_ind,
                         block_dim,
                         info,
                         done_array,
                         reinterpret_cast<const U*>(info->boost_tol),
                         reinterpret_cast<const T*>(info->boost_val));
    }
    else
    {
        bsrilu0_launcher(handle,
                         dir,
                         mb,
                         descr->base,
                         bsr_val,
                         bsr_row_ptr,
                         bsr_col_ind,
                         block_dim,
                         info,
                         done_array,
                         (info->boost_enable) ? *reinterpret_cast<const U*>(info->boost_tol)
                                              : static_cast<U>(0),
                         (info->boost_enable) ? *reinterpret_cast<const T*>(info->boost_val)
                                              : static_cast<T>(0));
    }

    return rocsparse_status_success;
}

extern "C" rocsparse_status rocsparse_bsrilu0_clear(rocsparse_handle   handle,
                                                    rocsparse_mat_info info)
try
{
    ROCSPARSE_CHECKARG_HANDLE(0, handle);
    // Logging
    log_trace(handle, "rocsparse_bsrilu0_clear", (const void*&)info);

    ROCSPARSE_CHECKARG_POINTER(1, info);

    // If meta data is not shared, delete it
    if(!rocsparse_check_trm_shared(info, info->bsrilu0_info))
    {
        RETURN_IF_ROCSPARSE_ERROR(rocsparse_destroy_trm_info(info->bsrilu0_info));
    }

    info->bsrilu0_info = nullptr;

    return rocsparse_status_success;
}
catch(...)
{
    RETURN_ROCSPARSE_EXCEPTION();
}

template <typename T>
rocsparse_status rocsparse_bsrilu0_buffer_size_template(rocsparse_handle          handle,
                                                        rocsparse_direction       dir,
                                                        rocsparse_int             mb,
                                                        rocsparse_int             nnzb,
                                                        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,
                                                        rocsparse_mat_info        info,
                                                        size_t*                   buffer_size)
{
    RETURN_IF_ROCSPARSE_ERROR(rocsparse_csrsv_buffer_size_template(handle,
                                                                   rocsparse_operation_none,
                                                                   mb,
                                                                   nnzb,
                                                                   descr,
                                                                   bsr_val,
                                                                   bsr_row_ptr,
                                                                   bsr_col_ind,
                                                                   info,
                                                                   buffer_size));
    return rocsparse_status_success;
}

template <typename T>
rocsparse_status rocsparse_bsrilu0_buffer_size_impl(rocsparse_handle          handle,
                                                    rocsparse_direction       dir,
                                                    rocsparse_int             mb,
                                                    rocsparse_int             nnzb,
                                                    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,
                                                    rocsparse_mat_info        info,
                                                    size_t*                   buffer_size)
{
    ROCSPARSE_CHECKARG_HANDLE(0, handle);

    log_trace(handle,
              replaceX<T>("rocsparse_Xbsrilu0_buffer_size"),
              dir,
              mb,
              nnzb,
              (const void*&)descr,
              (const void*&)bsr_val,
              (const void*&)bsr_row_ptr,
              (const void*&)bsr_col_ind,
              block_dim,
              (const void*&)info,
              (const void*&)buffer_size);

    ROCSPARSE_CHECKARG_ENUM(1, dir);
    ROCSPARSE_CHECKARG_SIZE(2, mb);
    ROCSPARSE_CHECKARG_SIZE(3, nnzb);
    ROCSPARSE_CHECKARG_POINTER(4, descr);
    ROCSPARSE_CHECKARG(
        4, descr, (descr->type != rocsparse_matrix_type_general), rocsparse_status_not_implemented);
    ROCSPARSE_CHECKARG(4,
                       descr,
                       (descr->storage_mode != rocsparse_storage_mode_sorted),
                       rocsparse_status_requires_sorted_storage);
    ROCSPARSE_CHECKARG_ARRAY(5, nnzb, bsr_val);
    ROCSPARSE_CHECKARG_ARRAY(6, mb, bsr_row_ptr);
    ROCSPARSE_CHECKARG_ARRAY(7, nnzb, bsr_col_ind);
    ROCSPARSE_CHECKARG_SIZE(8, block_dim);
    ROCSPARSE_CHECKARG(8, block_dim, (block_dim == 0), rocsparse_status_invalid_size);
    ROCSPARSE_CHECKARG_POINTER(9, info);
    ROCSPARSE_CHECKARG_POINTER(10, buffer_size);
    RETURN_IF_ROCSPARSE_ERROR(rocsparse_bsrilu0_buffer_size_template(handle,
                                                                     dir,
                                                                     mb,
                                                                     nnzb,
                                                                     descr,
                                                                     bsr_val,
                                                                     bsr_row_ptr,
                                                                     bsr_col_ind,
                                                                     block_dim,
                                                                     info,
                                                                     buffer_size));

    return rocsparse_status_success;
}

#define CIMPL(NAME, T)                                                              \
    extern "C" rocsparse_status NAME(rocsparse_handle          handle,              \
                                     rocsparse_direction       dir,                 \
                                     rocsparse_int             mb,                  \
                                     rocsparse_int             nnzb,                \
                                     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,           \
                                     rocsparse_mat_info        info,                \
                                     size_t*                   buffer_size)         \
    try                                                                             \
    {                                                                               \
        RETURN_IF_ROCSPARSE_ERROR(rocsparse_bsrilu0_buffer_size_impl(handle,        \
                                                                     dir,           \
                                                                     mb,            \
                                                                     nnzb,          \
                                                                     descr,         \
                                                                     bsr_val,       \
                                                                     bsr_row_ptr,   \
                                                                     bsr_col_ind,   \
                                                                     block_dim,     \
                                                                     info,          \
                                                                     buffer_size)); \
        return rocsparse_status_success;                                            \
    }                                                                               \
    catch(...)                                                                      \
    {                                                                               \
        RETURN_ROCSPARSE_EXCEPTION();                                               \
    }

CIMPL(rocsparse_sbsrilu0_buffer_size, float);
CIMPL(rocsparse_dbsrilu0_buffer_size, double);
CIMPL(rocsparse_cbsrilu0_buffer_size, rocsparse_float_complex);
CIMPL(rocsparse_zbsrilu0_buffer_size, rocsparse_double_complex);
#undef CIMPL

#define CIMPL(NAME, U, V)                                                   \
    extern "C" rocsparse_status NAME(rocsparse_handle   handle,             \
                                     rocsparse_mat_info info,               \
                                     int                enable_boost,       \
                                     const U*           boost_tol,          \
                                     const V*           boost_val)          \
    try                                                                     \
    {                                                                       \
        RETURN_IF_ROCSPARSE_ERROR(rocsparse_bsrilu0_numeric_boost_template( \
            handle, info, enable_boost, boost_tol, boost_val));             \
        return rocsparse_status_success;                                    \
    }                                                                       \
    catch(...)                                                              \
    {                                                                       \
        RETURN_ROCSPARSE_EXCEPTION();                                       \
    }

CIMPL(rocsparse_sbsrilu0_numeric_boost, float, float);
CIMPL(rocsparse_dbsrilu0_numeric_boost, double, double);
CIMPL(rocsparse_cbsrilu0_numeric_boost, float, rocsparse_float_complex);
CIMPL(rocsparse_zbsrilu0_numeric_boost, double, rocsparse_double_complex);
CIMPL(rocsparse_dsbsrilu0_numeric_boost, double, float);
CIMPL(rocsparse_dcbsrilu0_numeric_boost, double, rocsparse_float_complex);
#undef CIMPL

#define CIMPL(NAME, T)                                                               \
    extern "C" rocsparse_status NAME(rocsparse_handle          handle,               \
                                     rocsparse_direction       dir,                  \
                                     rocsparse_int             mb,                   \
                                     rocsparse_int             nnzb,                 \
                                     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,            \
                                     rocsparse_mat_info        info,                 \
                                     rocsparse_analysis_policy analysis,             \
                                     rocsparse_solve_policy    solve,                \
                                     void*                     temp_buffer)          \
    try                                                                              \
    {                                                                                \
        RETURN_IF_ROCSPARSE_ERROR(rocsparse_bsrilu0_analysis_template(handle,        \
                                                                      dir,           \
                                                                      mb,            \
                                                                      nnzb,          \
                                                                      descr,         \
                                                                      bsr_val,       \
                                                                      bsr_row_ptr,   \
                                                                      bsr_col_ind,   \
                                                                      block_dim,     \
                                                                      info,          \
                                                                      analysis,      \
                                                                      solve,         \
                                                                      temp_buffer)); \
        return rocsparse_status_success;                                             \
    }                                                                                \
    catch(...)                                                                       \
    {                                                                                \
        RETURN_ROCSPARSE_EXCEPTION();                                                \
    }

CIMPL(rocsparse_sbsrilu0_analysis, float);
CIMPL(rocsparse_dbsrilu0_analysis, double);
CIMPL(rocsparse_cbsrilu0_analysis, rocsparse_float_complex);
CIMPL(rocsparse_zbsrilu0_analysis, rocsparse_double_complex);
#undef CIMPL

extern "C" rocsparse_status rocsparse_sbsrilu0(rocsparse_handle          handle,
                                               rocsparse_direction       dir,
                                               rocsparse_int             mb,
                                               rocsparse_int             nnzb,
                                               const rocsparse_mat_descr descr,
                                               float*                    bsr_val,
                                               const rocsparse_int*      bsr_row_ptr,
                                               const rocsparse_int*      bsr_col_ind,
                                               rocsparse_int             block_dim,
                                               rocsparse_mat_info        info,
                                               rocsparse_solve_policy    policy,
                                               void*                     temp_buffer)
try
{
    if(info != nullptr && info->use_double_prec_tol)
    {
        RETURN_IF_ROCSPARSE_ERROR((rocsparse_bsrilu0_template<float, double>(handle,
                                                                             dir,
                                                                             mb,
                                                                             nnzb,
                                                                             descr,
                                                                             bsr_val,
                                                                             bsr_row_ptr,
                                                                             bsr_col_ind,
                                                                             block_dim,
                                                                             info,
                                                                             policy,
                                                                             temp_buffer)));
        return rocsparse_status_success;
    }
    else
    {
        RETURN_IF_ROCSPARSE_ERROR((rocsparse_bsrilu0_template<float, float>(handle,
                                                                            dir,
                                                                            mb,
                                                                            nnzb,
                                                                            descr,
                                                                            bsr_val,
                                                                            bsr_row_ptr,
                                                                            bsr_col_ind,
                                                                            block_dim,
                                                                            info,
                                                                            policy,
                                                                            temp_buffer)));
        return rocsparse_status_success;
    }
}
catch(...)
{
    RETURN_ROCSPARSE_EXCEPTION();
}

extern "C" rocsparse_status rocsparse_dbsrilu0(rocsparse_handle          handle,
                                               rocsparse_direction       dir,
                                               rocsparse_int             mb,
                                               rocsparse_int             nnzb,
                                               const rocsparse_mat_descr descr,
                                               double*                   bsr_val,
                                               const rocsparse_int*      bsr_row_ptr,
                                               const rocsparse_int*      bsr_col_ind,
                                               rocsparse_int             block_dim,
                                               rocsparse_mat_info        info,
                                               rocsparse_solve_policy    policy,
                                               void*                     temp_buffer)
try
{
    RETURN_IF_ROCSPARSE_ERROR((rocsparse_bsrilu0_template<double, double>(handle,
                                                                          dir,
                                                                          mb,
                                                                          nnzb,
                                                                          descr,
                                                                          bsr_val,
                                                                          bsr_row_ptr,
                                                                          bsr_col_ind,
                                                                          block_dim,
                                                                          info,
                                                                          policy,
                                                                          temp_buffer)));
    return rocsparse_status_success;
}
catch(...)
{
    RETURN_ROCSPARSE_EXCEPTION();
}

extern "C" rocsparse_status rocsparse_cbsrilu0(rocsparse_handle          handle,
                                               rocsparse_direction       dir,
                                               rocsparse_int             mb,
                                               rocsparse_int             nnzb,
                                               const rocsparse_mat_descr descr,
                                               rocsparse_float_complex*  bsr_val,
                                               const rocsparse_int*      bsr_row_ptr,
                                               const rocsparse_int*      bsr_col_ind,
                                               rocsparse_int             block_dim,
                                               rocsparse_mat_info        info,
                                               rocsparse_solve_policy    policy,
                                               void*                     temp_buffer)
try
{
    if(info != nullptr && info->use_double_prec_tol)
    {
        RETURN_IF_ROCSPARSE_ERROR(
            (rocsparse_bsrilu0_template<rocsparse_float_complex, double>(handle,
                                                                         dir,
                                                                         mb,
                                                                         nnzb,
                                                                         descr,
                                                                         bsr_val,
                                                                         bsr_row_ptr,
                                                                         bsr_col_ind,
                                                                         block_dim,
                                                                         info,
                                                                         policy,
                                                                         temp_buffer)));
        return rocsparse_status_success;
    }
    else
    {
        RETURN_IF_ROCSPARSE_ERROR(
            (rocsparse_bsrilu0_template<rocsparse_float_complex, float>(handle,
                                                                        dir,
                                                                        mb,
                                                                        nnzb,
                                                                        descr,
                                                                        bsr_val,
                                                                        bsr_row_ptr,
                                                                        bsr_col_ind,
                                                                        block_dim,
                                                                        info,
                                                                        policy,
                                                                        temp_buffer)));
        return rocsparse_status_success;
    }
}
catch(...)
{
    RETURN_ROCSPARSE_EXCEPTION();
}

extern "C" rocsparse_status rocsparse_zbsrilu0(rocsparse_handle          handle,
                                               rocsparse_direction       dir,
                                               rocsparse_int             mb,
                                               rocsparse_int             nnzb,
                                               const rocsparse_mat_descr descr,
                                               rocsparse_double_complex* bsr_val,
                                               const rocsparse_int*      bsr_row_ptr,
                                               const rocsparse_int*      bsr_col_ind,
                                               rocsparse_int             block_dim,
                                               rocsparse_mat_info        info,
                                               rocsparse_solve_policy    policy,
                                               void*                     temp_buffer)
try
{
    RETURN_IF_ROCSPARSE_ERROR(
        (rocsparse_bsrilu0_template<rocsparse_double_complex, double>(handle,
                                                                      dir,
                                                                      mb,
                                                                      nnzb,
                                                                      descr,
                                                                      bsr_val,
                                                                      bsr_row_ptr,
                                                                      bsr_col_ind,
                                                                      block_dim,
                                                                      info,
                                                                      policy,
                                                                      temp_buffer)));
    return rocsparse_status_success;
}
catch(...)
{
    RETURN_ROCSPARSE_EXCEPTION();
}

extern "C" rocsparse_status rocsparse_bsrilu0_zero_pivot(rocsparse_handle   handle,
                                                         rocsparse_mat_info info,
                                                         rocsparse_int*     position)
try
{
    ROCSPARSE_CHECKARG_HANDLE(0, handle);

    // Logging
    log_trace(handle, "rocsparse_bsrilu0_zero_pivot", (const void*&)info, (const void*&)position);

    ROCSPARSE_CHECKARG_POINTER(1, info);
    ROCSPARSE_CHECKARG_POINTER(2, position);

    // Stream
    hipStream_t stream = handle->stream;

    // If mb == 0 || nnzb == 0 it can happen, that info structure is not created.
    // In this case, always return -1.
    if(info->bsrilu0_info == nullptr)
    {
        if(handle->pointer_mode == rocsparse_pointer_mode_device)
        {
            RETURN_IF_HIP_ERROR(hipMemsetAsync(position, 0xFF, sizeof(rocsparse_int), stream));
        }
        else
        {
            *position = -1;
        }

        return rocsparse_status_success;
    }

    // Differentiate between pointer modes
    if(handle->pointer_mode == rocsparse_pointer_mode_device)
    {
        // rocsparse_pointer_mode_device
        rocsparse_int pivot;

        RETURN_IF_HIP_ERROR(hipMemcpyAsync(
            &pivot, info->zero_pivot, sizeof(rocsparse_int), hipMemcpyDeviceToHost, stream));

        // Wait for host transfer to finish
        RETURN_IF_HIP_ERROR(hipStreamSynchronize(stream));

        if(pivot == std::numeric_limits<rocsparse_int>::max())
        {
            RETURN_IF_HIP_ERROR(hipMemsetAsync(position, 0xFF, sizeof(rocsparse_int), stream));
        }
        else
        {
            RETURN_IF_HIP_ERROR(hipMemcpyAsync(position,
                                               info->zero_pivot,
                                               sizeof(rocsparse_int),
                                               hipMemcpyDeviceToDevice,
                                               stream));

            RETURN_IF_ROCSPARSE_ERROR(rocsparse_status_zero_pivot);
        }
    }
    else
    {
        // rocsparse_pointer_mode_host
        RETURN_IF_HIP_ERROR(hipMemcpyAsync(
            position, info->zero_pivot, sizeof(rocsparse_int), hipMemcpyDeviceToHost, stream));
        RETURN_IF_HIP_ERROR(hipStreamSynchronize(stream));

        // If no zero pivot is found, set -1
        if(*position == std::numeric_limits<rocsparse_int>::max())
        {
            *position = -1;
        }
        else
        {
            RETURN_IF_ROCSPARSE_ERROR(rocsparse_status_zero_pivot);
        }
    }

    return rocsparse_status_success;
}
catch(...)
{
    RETURN_ROCSPARSE_EXCEPTION();
}
