/* ************************************************************************
 * Copyright (C) 2016-2024 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 cop-
 * ies 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 IM-
 * PLIED, 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 CONNE-
 * CTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * ************************************************************************ */
#pragma once

#include "handle.hpp"
#include "int64_helpers.hpp"
#include "logging.hpp"
#include "rocblas.h"
#include "rocblas_block_sizes.h"
#include "rocblas_dot.hpp"
#include "utility.hpp"

namespace
{

    template <bool, typename>
    constexpr char rocblas_dot_strided_batched_name[] = "unknown";
    template <bool CONJ>
    constexpr char rocblas_dot_strided_batched_name<CONJ, float>[]
        = ROCBLAS_API_STR(rocblas_sdot_strided_batched);
    template <bool CONJ>
    constexpr char rocblas_dot_strided_batched_name<CONJ, double>[]
        = ROCBLAS_API_STR(rocblas_ddot_strided_batched);
    template <bool CONJ>
    constexpr char rocblas_dot_strided_batched_name<CONJ, rocblas_half>[]
        = ROCBLAS_API_STR(rocblas_hdot_strided_batched);
    template <bool CONJ>
    constexpr char rocblas_dot_strided_batched_name<CONJ, rocblas_bfloat16>[]
        = ROCBLAS_API_STR(rocblas_bfdot_strided_batched);
    template <>
    constexpr char rocblas_dot_strided_batched_name<true, rocblas_float_complex>[]
        = ROCBLAS_API_STR(rocblas_cdotc_strided_batched);
    template <>
    constexpr char rocblas_dot_strided_batched_name<false, rocblas_float_complex>[]
        = ROCBLAS_API_STR(rocblas_cdotu_strided_batched);
    template <>
    constexpr char rocblas_dot_strided_batched_name<true, rocblas_double_complex>[]
        = ROCBLAS_API_STR(rocblas_zdotc_strided_batched);
    template <>
    constexpr char rocblas_dot_strided_batched_name<false, rocblas_double_complex>[]
        = ROCBLAS_API_STR(rocblas_zdotu_strided_batched);

    // allocate workspace inside this API
    template <typename API_INT, bool CONJ, typename T, typename T2 = T>
    inline rocblas_status rocblas_dot_strided_batched_impl(rocblas_handle handle,
                                                           API_INT        n,
                                                           const T*       x,
                                                           API_INT        incx,
                                                           rocblas_stride stridex,
                                                           const T*       y,
                                                           API_INT        incy,
                                                           rocblas_stride stridey,
                                                           API_INT        batch_count,
                                                           T*             results)
    {
        static constexpr int WIN = rocblas_dot_WIN<T>();

        if(!handle)
            return rocblas_status_invalid_handle;

        if constexpr(std::is_same_v<API_INT, int>)
        {
            if(batch_count > c_YZ_grid_launch_limit && handle->isYZGridDim16bit())
            {
                return rocblas_status_invalid_size;
            }
        }

        size_t dev_bytes = rocblas_reduction_workspace_size<API_INT, ROCBLAS_DOT_NB * WIN, T2>(
            n, incx, incy, batch_count);
        if(handle->is_device_memory_size_query())
        {
            if(n <= 0 || batch_count <= 0)
                return rocblas_status_size_unchanged;
            else
                return handle->set_optimal_device_memory_size(dev_bytes);
        }

        auto layer_mode     = handle->layer_mode;
        auto check_numerics = handle->check_numerics;
        if(layer_mode & rocblas_layer_mode_log_trace)
            log_trace(handle,
                      rocblas_dot_strided_batched_name<CONJ, T>,
                      n,
                      x,
                      incx,
                      stridex,
                      y,
                      incy,
                      stridey,
                      batch_count);

        if(layer_mode & rocblas_layer_mode_log_bench)
            log_bench(handle,
                      ROCBLAS_API_BENCH " -f dot_strided_batched -r",
                      rocblas_precision_string<T>,
                      "-n",
                      n,
                      "--incx",
                      incx,
                      "--stride_x",
                      stridex,
                      "--incy",
                      incy,
                      "--stride_y",
                      stridey,
                      "--batch_count",
                      batch_count);

        if(layer_mode & rocblas_layer_mode_log_profile)
            log_profile(handle,
                        rocblas_dot_strided_batched_name<CONJ, T>,
                        "N",
                        n,
                        "incx",
                        incx,
                        "stride_x",
                        stridex,
                        "incy",
                        incy,
                        "stride_y",
                        stridey,
                        "batch_count",
                        batch_count);

        // Quick return if possible.
        if(batch_count <= 0)
            return rocblas_status_success;

        if(n <= 0)
        {
            if(!results)
                return rocblas_status_invalid_pointer;
            if(rocblas_pointer_mode_device == handle->pointer_mode)
                RETURN_IF_HIP_ERROR(hipMemsetAsync(
                    results, 0, sizeof(*results) * batch_count, handle->get_stream()));
            else
                memset(results, 0, sizeof(*results) * batch_count);
            return rocblas_status_success;
        }

        if(!x || !y || !results)
            return rocblas_status_invalid_pointer;

        auto w_mem = handle->device_malloc(dev_bytes);
        if(!w_mem)
            return rocblas_status_memory_error;

        if(check_numerics)
        {
            bool           is_input = true;
            rocblas_status dot_check_numerics_status
                = rocblas_dot_check_numerics(rocblas_dot_strided_batched_name<CONJ, T>,
                                             handle,
                                             n,
                                             x,
                                             0,
                                             incx,
                                             stridex,
                                             y,
                                             0,
                                             incy,
                                             stridey,
                                             batch_count,
                                             check_numerics,
                                             is_input);
            if(dot_check_numerics_status != rocblas_status_success)
                return dot_check_numerics_status;
        }

        rocblas_status status;
        if constexpr(rocblas_is_complex<T> && CONJ)
            status = ROCBLAS_API(rocblas_internal_dotc_template)(handle,
                                                                 n,
                                                                 x,
                                                                 0,
                                                                 incx,
                                                                 stridex,
                                                                 y,
                                                                 0,
                                                                 incy,
                                                                 stridey,
                                                                 batch_count,
                                                                 results,
                                                                 (T2*)w_mem);
        else
            status = ROCBLAS_API(rocblas_internal_dot_template)(handle,
                                                                n,
                                                                x,
                                                                0,
                                                                incx,
                                                                stridex,
                                                                y,
                                                                0,
                                                                incy,
                                                                stridey,
                                                                batch_count,
                                                                results,
                                                                (T2*)w_mem);

        if(status != rocblas_status_success)
            return status;

        if(check_numerics)
        {
            bool           is_input = false;
            rocblas_status dot_check_numerics_status
                = rocblas_dot_check_numerics(rocblas_dot_strided_batched_name<CONJ, T>,
                                             handle,
                                             n,
                                             x,
                                             0,
                                             incx,
                                             stridex,
                                             y,
                                             0,
                                             incy,
                                             stridey,
                                             batch_count,
                                             check_numerics,
                                             is_input);
            if(dot_check_numerics_status != rocblas_status_success)
                return dot_check_numerics_status;
        }
        return status;
    }

} // namespace

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

#ifdef IMPL
#error IMPL ALREADY DEFINED
#endif

#define IMPL(name_, TI_, conj_, T_, Tex_)                                         \
    rocblas_status name_(rocblas_handle handle,                                   \
                         TI_            n,                                        \
                         const T_*      x,                                        \
                         TI_            incx,                                     \
                         rocblas_stride stridex,                                  \
                         const T_*      y,                                        \
                         TI_            incy,                                     \
                         rocblas_stride stridey,                                  \
                         TI_            batch_count,                              \
                         T_*            results)                                  \
    try                                                                           \
    {                                                                             \
        return rocblas_dot_strided_batched_impl<TI_, conj_, T_, Tex_>(            \
            handle, n, x, incx, stridex, y, incy, stridey, batch_count, results); \
    }                                                                             \
    catch(...)                                                                    \
    {                                                                             \
        return exception_to_rocblas_status();                                     \
    }

#define INST_DOT_STRIDED_BATCHED_C_API(TI_)                                                  \
    extern "C" {                                                                             \
    IMPL(ROCBLAS_API(rocblas_sdot_strided_batched), TI_, false, float, float);               \
    IMPL(ROCBLAS_API(rocblas_ddot_strided_batched), TI_, false, double, double);             \
    IMPL(ROCBLAS_API(rocblas_hdot_strided_batched), TI_, false, rocblas_half, rocblas_half); \
    IMPL(ROCBLAS_API(rocblas_bfdot_strided_batched), TI_, false, rocblas_bfloat16, float);   \
    IMPL(ROCBLAS_API(rocblas_cdotu_strided_batched),                                         \
         TI_,                                                                                \
         false,                                                                              \
         rocblas_float_complex,                                                              \
         rocblas_float_complex);                                                             \
    IMPL(ROCBLAS_API(rocblas_zdotu_strided_batched),                                         \
         TI_,                                                                                \
         false,                                                                              \
         rocblas_double_complex,                                                             \
         rocblas_double_complex);                                                            \
    IMPL(ROCBLAS_API(rocblas_cdotc_strided_batched),                                         \
         TI_,                                                                                \
         true,                                                                               \
         rocblas_float_complex,                                                              \
         rocblas_float_complex);                                                             \
    IMPL(ROCBLAS_API(rocblas_zdotc_strided_batched),                                         \
         TI_,                                                                                \
         true,                                                                               \
         rocblas_double_complex,                                                             \
         rocblas_double_complex);                                                            \
    } // extern "C"
