/* ************************************************************************
 * Copyright 2016-2020 Advanced Micro Devices, Inc.
 * ************************************************************************ */
#include "rocblas_hbmv.hpp"
#include "handle.hpp"
#include "logging.hpp"
#include "rocblas.h"
#include "utility.hpp"

namespace
{
    template <typename>
    constexpr char rocblas_hbmv_name[] = "unknown";
    template <>
    constexpr char rocblas_hbmv_name<rocblas_float_complex>[] = "rocblas_chbmv";
    template <>
    constexpr char rocblas_hbmv_name<rocblas_double_complex>[] = "rocblas_zhbmv";

    template <typename T>
    rocblas_status rocblas_hbmv_impl(rocblas_handle handle,
                                     rocblas_fill   uplo,
                                     rocblas_int    n,
                                     rocblas_int    k,
                                     const T*       alpha,
                                     const T*       A,
                                     rocblas_int    lda,
                                     const T*       x,
                                     rocblas_int    incx,
                                     const T*       beta,
                                     T*             y,
                                     rocblas_int    incy)
    {
        if(!handle)
            return rocblas_status_invalid_handle;
        RETURN_ZERO_DEVICE_MEMORY_SIZE_IF_QUERIED(handle);

        auto layer_mode     = handle->layer_mode;
        auto check_numerics = handle->check_numerics;
        if(layer_mode
           & (rocblas_layer_mode_log_trace | rocblas_layer_mode_log_bench
              | rocblas_layer_mode_log_profile))
        {
            auto uplo_letter = rocblas_fill_letter(uplo);

            if(layer_mode & rocblas_layer_mode_log_trace)
                log_trace(handle,
                          rocblas_hbmv_name<T>,
                          uplo,
                          n,
                          k,
                          LOG_TRACE_SCALAR_VALUE(handle, alpha),
                          A,
                          lda,
                          x,
                          incx,
                          LOG_TRACE_SCALAR_VALUE(handle, beta),
                          y,
                          incy);

            if(layer_mode & rocblas_layer_mode_log_bench)
                log_bench(handle,
                          "./rocblas-bench -f hbmv -r",
                          rocblas_precision_string<T>,
                          "--uplo",
                          uplo_letter,
                          "-n",
                          n,
                          "-k",
                          k,
                          LOG_BENCH_SCALAR_VALUE(handle, alpha),
                          "--lda",
                          lda,
                          "--incx",
                          incx,
                          LOG_BENCH_SCALAR_VALUE(handle, beta),
                          "--incy",
                          incy);

            if(layer_mode & rocblas_layer_mode_log_profile)
                log_profile(handle,
                            rocblas_hbmv_name<T>,
                            "uplo",
                            uplo_letter,
                            "N",
                            n,
                            "K",
                            k,
                            "lda",
                            lda,
                            "incx",
                            incx,
                            "incy",
                            incy);
        }

        if(n < 0 || k < 0 || lda <= k || !incx || !incy)
            return rocblas_status_invalid_size;

        if(!n)
            return rocblas_status_success;

        if(!alpha || !beta)
            return rocblas_status_invalid_pointer;

        if(handle->pointer_mode == rocblas_pointer_mode_host && !*alpha)
        {
            if(*beta == 1)
                return rocblas_status_success;
        }
        else if(!A || !x)
            return rocblas_status_invalid_pointer;

        if(!y)
            return rocblas_status_invalid_pointer;

        if(check_numerics)
        {
            bool           is_input = true;
            rocblas_status hbmv_check_numerics_status
                = rocblas_hbmv_check_numerics(rocblas_hbmv_name<T>,
                                              handle,
                                              n,
                                              k,
                                              A,
                                              0,
                                              lda,
                                              0,
                                              x,
                                              0,
                                              incx,
                                              0,
                                              y,
                                              0,
                                              incy,
                                              0,
                                              1,
                                              check_numerics,
                                              is_input);
            if(hbmv_check_numerics_status != rocblas_status_success)
                return hbmv_check_numerics_status;
        }

        rocblas_status status = rocblas_hbmv_template(
            handle, uplo, n, k, alpha, A, 0, lda, 0, x, 0, incx, 0, beta, y, 0, incy, 0, 1);
        if(status != rocblas_status_success)
            return status;

        if(check_numerics)
        {
            bool           is_input = false;
            rocblas_status hbmv_check_numerics_status
                = rocblas_hbmv_check_numerics(rocblas_hbmv_name<T>,
                                              handle,
                                              n,
                                              k,
                                              A,
                                              0,
                                              lda,
                                              0,
                                              x,
                                              0,
                                              incx,
                                              0,
                                              y,
                                              0,
                                              incy,
                                              0,
                                              1,
                                              check_numerics,
                                              is_input);
            if(hbmv_check_numerics_status != rocblas_status_success)
                return hbmv_check_numerics_status;
        }
        return status;
    }
} // namespace

/*
* ===========================================================================
*    C wrapper
* ===========================================================================
*/

extern "C" {

rocblas_status rocblas_chbmv(rocblas_handle               handle,
                             rocblas_fill                 uplo,
                             rocblas_int                  n,
                             rocblas_int                  k,
                             const rocblas_float_complex* alpha,
                             const rocblas_float_complex* A,
                             rocblas_int                  lda,
                             const rocblas_float_complex* x,
                             rocblas_int                  incx,
                             const rocblas_float_complex* beta,
                             rocblas_float_complex*       y,
                             rocblas_int                  incy)
try
{
    return rocblas_hbmv_impl(handle, uplo, n, k, alpha, A, lda, x, incx, beta, y, incy);
}
catch(...)
{
    return exception_to_rocblas_status();
}

rocblas_status rocblas_zhbmv(rocblas_handle                handle,
                             rocblas_fill                  uplo,
                             rocblas_int                   n,
                             rocblas_int                   k,
                             const rocblas_double_complex* alpha,
                             const rocblas_double_complex* A,
                             rocblas_int                   lda,
                             const rocblas_double_complex* x,
                             rocblas_int                   incx,
                             const rocblas_double_complex* beta,
                             rocblas_double_complex*       y,
                             rocblas_int                   incy)
try
{
    return rocblas_hbmv_impl(handle, uplo, n, k, alpha, A, lda, x, incx, beta, y, incy);
}
catch(...)
{
    return exception_to_rocblas_status();
}

} // extern "C"