/*! \file */
/* ************************************************************************
 * Copyright (c) 2018-2021 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_hybmv.hpp"
#include "definitions.h"
#include "rocsparse_coomv.hpp"
#include "rocsparse_ellmv.hpp"
#include "utility.h"

template <typename T>
rocsparse_status rocsparse_hybmv_template(rocsparse_handle          handle,
                                          rocsparse_operation       trans,
                                          const T*                  alpha_device_host,
                                          const rocsparse_mat_descr descr,
                                          const rocsparse_hyb_mat   hyb,
                                          const T*                  x,
                                          const T*                  beta_device_host,
                                          T*                        y)
{
    // Check for valid handle and matrix descriptor
    if(handle == nullptr)
    {
        return rocsparse_status_invalid_handle;
    }

    if(descr == nullptr || hyb == nullptr)
    {
        return rocsparse_status_invalid_pointer;
    }

    // Logging
    log_trace(handle,
              replaceX<T>("rocsparse_Xhybmv"),
              trans,
              LOG_TRACE_SCALAR_VALUE(handle, alpha_device_host),
              (const void*&)descr,
              (const void*&)hyb,
              (const void*&)x,
              LOG_TRACE_SCALAR_VALUE(handle, beta_device_host),
              (const void*&)y);

    log_bench(handle,
              "./rocsparse-bench -f hybmv -r",
              replaceX<T>("X"),
              "--mtx <matrix.mtx> ",
              "--alpha",
              LOG_BENCH_SCALAR_VALUE(handle, alpha_device_host),
              "--beta",
              LOG_BENCH_SCALAR_VALUE(handle, beta_device_host));

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

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

    // Check pointer arguments
    if(alpha_device_host == nullptr || beta_device_host == nullptr)
    {
        return rocsparse_status_invalid_pointer;
    }

    if(handle->pointer_mode == rocsparse_pointer_mode_host
       && *alpha_device_host == static_cast<T>(0) && *beta_device_host == static_cast<T>(1))
    {
        return rocsparse_status_success;
    }

    // Check the rest of pointer arguments
    if(x == nullptr || y == nullptr)
    {
        return rocsparse_status_invalid_pointer;
    }

    // LCOV_EXCL_START
    // Check sizes
    if(hyb->m < 0 || hyb->n < 0 || hyb->ell_nnz + hyb->coo_nnz < 0)
    {
        return rocsparse_status_invalid_size;
    }

    // Check ELL-HYB structure
    if(hyb->ell_nnz > 0)
    {
        if(hyb->ell_width < 0)
        {
            return rocsparse_status_invalid_size;
        }
        else if(hyb->ell_col_ind == nullptr || hyb->ell_val == nullptr)
        {
            return rocsparse_status_invalid_pointer;
        }
    }

    // Check COO-HYB structure
    if(hyb->coo_nnz > 0)
    {
        if(hyb->coo_row_ind == nullptr || hyb->coo_col_ind == nullptr || hyb->coo_val == nullptr)
        {
            return rocsparse_status_invalid_pointer;
        }
    }
    // LCOV_EXCL_STOP

    // Quick return if possible
    if(hyb->m == 0 || hyb->n == 0 || hyb->ell_nnz + hyb->coo_nnz == 0)
    {
        return rocsparse_status_success;
    }

    // ELL part
    if(hyb->ell_nnz > 0)
    {
        RETURN_IF_ROCSPARSE_ERROR(rocsparse_ellmv_template(handle,
                                                           trans,
                                                           hyb->m,
                                                           hyb->n,
                                                           alpha_device_host,
                                                           descr,
                                                           (T*)hyb->ell_val,
                                                           hyb->ell_col_ind,
                                                           hyb->ell_width,
                                                           x,
                                                           beta_device_host,
                                                           y));
    }

    // COO part
    if(hyb->coo_nnz > 0)
    {
        if(handle->pointer_mode == rocsparse_pointer_mode_device)
        {
            // Beta is applied by ELL part, IF ell_nnz > 0
            if(hyb->ell_nnz > 0)
            {
                T* coo_beta = nullptr;
                rocsparse_one(handle, &coo_beta);

                RETURN_IF_ROCSPARSE_ERROR(rocsparse_coomv_template(handle,
                                                                   trans,
                                                                   hyb->m,
                                                                   hyb->n,
                                                                   hyb->coo_nnz,
                                                                   alpha_device_host,
                                                                   descr,
                                                                   (T*)hyb->coo_val,
                                                                   hyb->coo_row_ind,
                                                                   hyb->coo_col_ind,
                                                                   x,
                                                                   coo_beta,
                                                                   y));
            }
            else
            {
                RETURN_IF_ROCSPARSE_ERROR(rocsparse_coomv_template(handle,
                                                                   trans,
                                                                   hyb->m,
                                                                   hyb->n,
                                                                   hyb->coo_nnz,
                                                                   alpha_device_host,
                                                                   descr,
                                                                   (T*)hyb->coo_val,
                                                                   hyb->coo_row_ind,
                                                                   hyb->coo_col_ind,
                                                                   x,
                                                                   beta_device_host,
                                                                   y));
            }
        }
        else
        {
            // Beta is applied by ELL part, IF ell_nnz > 0
            T coo_beta = (hyb->ell_nnz > 0) ? static_cast<T>(1) : *beta_device_host;

            RETURN_IF_ROCSPARSE_ERROR(rocsparse_coomv_template(handle,
                                                               trans,
                                                               hyb->m,
                                                               hyb->n,
                                                               hyb->coo_nnz,
                                                               alpha_device_host,
                                                               descr,
                                                               (T*)hyb->coo_val,
                                                               hyb->coo_row_ind,
                                                               hyb->coo_col_ind,
                                                               x,
                                                               &coo_beta,
                                                               y));
        }
    }

    return rocsparse_status_success;
}

/*
 * ===========================================================================
 *    C wrapper
 * ===========================================================================
 */
#define C_IMPL(NAME, TYPE)                                                             \
    extern "C" rocsparse_status NAME(rocsparse_handle          handle,                 \
                                     rocsparse_operation       trans,                  \
                                     const TYPE*               alpha,                  \
                                     const rocsparse_mat_descr descr,                  \
                                     const rocsparse_hyb_mat   hyb,                    \
                                     const TYPE*               x,                      \
                                     const TYPE*               beta,                   \
                                     TYPE*                     y)                      \
    {                                                                                  \
        return rocsparse_hybmv_template(handle, trans, alpha, descr, hyb, x, beta, y); \
    }

C_IMPL(rocsparse_shybmv, float);
C_IMPL(rocsparse_dhybmv, double);
C_IMPL(rocsparse_chybmv, rocsparse_float_complex);
C_IMPL(rocsparse_zhybmv, rocsparse_double_complex);
#undef C_IMPL