/* ************************************************************************
 * Copyright 2016-2021 Advanced Micro Devices, Inc.
 *
 * ************************************************************************ */

#include <stdio.h>
#include <stdlib.h>
#include <vector>

#include "testing_common.hpp"

using namespace std;

/* ============================================================================================ */

template <typename T, bool CONJ = false>
hipblasStatus_t testing_dot_batched(const Arguments& argus)
{
    bool FORTRAN = argus.fortran;
    auto hipblasDotBatchedFn
        = FORTRAN ? (CONJ ? hipblasDotcBatched<T, true> : hipblasDotBatched<T, true>)
                  : (CONJ ? hipblasDotcBatched<T, false> : hipblasDotBatched<T, false>);

    int N           = argus.N;
    int incx        = argus.incx;
    int incy        = argus.incy;
    int batch_count = argus.batch_count;

    hipblasLocalHandle handle(argus);

    // argument sanity check, quick return if input parameters are invalid before allocating invalid
    // memory
    if(N <= 0 || batch_count <= 0)
    {
        device_vector<T> d_hipblas_result_0(std::max(batch_count, 1));
        host_vector<T>   h_hipblas_result_0(std::max(1, batch_count));
        hipblas_init_nan(h_hipblas_result_0.data(), std::max(1, batch_count));
        CHECK_HIP_ERROR(hipMemcpy(d_hipblas_result_0,
                                  h_hipblas_result_0,
                                  sizeof(T) * std::max(1, batch_count),
                                  hipMemcpyHostToDevice));

        CHECK_HIPBLAS_ERROR(hipblasSetPointerMode(handle, HIPBLAS_POINTER_MODE_DEVICE));
        CHECK_HIPBLAS_ERROR(hipblasDotBatchedFn(
            handle, N, nullptr, incx, nullptr, incy, batch_count, d_hipblas_result_0));

        if(batch_count > 0)
        {
            host_vector<T> cpu_0(batch_count);
            host_vector<T> gpu_0(batch_count);
            CHECK_HIP_ERROR(hipMemcpy(
                gpu_0, d_hipblas_result_0, sizeof(T) * batch_count, hipMemcpyDeviceToHost));
            unit_check_general<T>(1, batch_count, 1, cpu_0, gpu_0);
        }
        return HIPBLAS_STATUS_SUCCESS;
    }

    int    abs_incx = incx >= 0 ? incx : -incx;
    int    abs_incy = incy >= 0 ? incy : -incy;
    size_t sizeX    = size_t(N) * abs_incx;
    size_t sizeY    = size_t(N) * abs_incy;

    double gpu_time_used, hipblas_error_host, hipblas_error_device;

    // Naming: dX is in GPU (device) memory. hK is in CPU (host) memory, plz follow this practice
    host_batch_vector<T> hx(N, incx, batch_count);
    host_batch_vector<T> hy(N, incy, batch_count);
    host_vector<T>       h_cpu_result(batch_count);
    host_vector<T>       h_hipblas_result1(batch_count);
    host_vector<T>       h_hipblas_result2(batch_count);

    device_batch_vector<T> dx(N, incx, batch_count);
    device_batch_vector<T> dy(N, incy, batch_count);
    device_vector<T>       d_hipblas_result(batch_count);
    CHECK_HIP_ERROR(dx.memcheck());
    CHECK_HIP_ERROR(dy.memcheck());

    hipblas_init_alternating_sign(hx, true);
    hipblas_init(hy, false);
    CHECK_HIP_ERROR(dx.transfer_from(hx));
    CHECK_HIP_ERROR(dy.transfer_from(hy));

    if(argus.unit_check || argus.norm_check)
    {
        /* =====================================================================
            HIPBLAS
        =================================================================== */
        // hipblasDot accept both dev/host pointer for the scalar
        CHECK_HIPBLAS_ERROR(hipblasSetPointerMode(handle, HIPBLAS_POINTER_MODE_DEVICE));
        CHECK_HIPBLAS_ERROR((hipblasDotBatchedFn)(handle,
                                                  N,
                                                  dx.ptr_on_device(),
                                                  incx,
                                                  dy.ptr_on_device(),
                                                  incy,
                                                  batch_count,
                                                  d_hipblas_result));

        CHECK_HIPBLAS_ERROR(hipblasSetPointerMode(handle, HIPBLAS_POINTER_MODE_HOST));
        CHECK_HIPBLAS_ERROR((hipblasDotBatchedFn)(handle,
                                                  N,
                                                  dx.ptr_on_device(),
                                                  incx,
                                                  dy.ptr_on_device(),
                                                  incy,
                                                  batch_count,
                                                  h_hipblas_result1));

        CHECK_HIP_ERROR(hipMemcpy(
            h_hipblas_result2, d_hipblas_result, sizeof(T) * batch_count, hipMemcpyDeviceToHost));

        /* =====================================================================
                    CPU BLAS
        =================================================================== */
        for(int b = 0; b < batch_count; b++)
        {
            (CONJ ? cblas_dotc<T> : cblas_dot<T>)(N, hx[b], incx, hy[b], incy, &(h_cpu_result[b]));
        }

        if(argus.unit_check)
        {
            unit_check_general<T>(1, batch_count, 1, h_cpu_result, h_hipblas_result1);
            unit_check_general<T>(1, batch_count, 1, h_cpu_result, h_hipblas_result2);
        }
        if(argus.norm_check)
        {
            hipblas_error_host
                = norm_check_general<T>('F', 1, batch_count, 1, h_cpu_result, h_hipblas_result1);
            hipblas_error_device
                = norm_check_general<T>('F', 1, batch_count, 1, h_cpu_result, h_hipblas_result2);
        }

    } // end of if unit/norm check

    if(argus.timing)
    {
        hipStream_t stream;
        CHECK_HIPBLAS_ERROR(hipblasGetStream(handle, &stream));
        CHECK_HIPBLAS_ERROR(hipblasSetPointerMode(handle, HIPBLAS_POINTER_MODE_DEVICE));

        int runs = argus.cold_iters + argus.iters;
        for(int iter = 0; iter < runs; iter++)
        {
            if(iter == argus.cold_iters)
                gpu_time_used = get_time_us_sync(stream);

            CHECK_HIPBLAS_ERROR((hipblasDotBatchedFn)(handle,
                                                      N,
                                                      dx.ptr_on_device(),
                                                      incx,
                                                      dy.ptr_on_device(),
                                                      incy,
                                                      batch_count,
                                                      d_hipblas_result));
        }
        gpu_time_used = get_time_us_sync(stream) - gpu_time_used;

        ArgumentModel<e_N, e_incx, e_incy, e_batch_count>{}.log_args<T>(std::cout,
                                                                        argus,
                                                                        gpu_time_used,
                                                                        dot_gflop_count<CONJ, T>(N),
                                                                        dot_gbyte_count<T>(N),
                                                                        hipblas_error_host,
                                                                        hipblas_error_device);
    }

    return HIPBLAS_STATUS_SUCCESS;
}

template <typename T>
hipblasStatus_t testing_dotc_batched(const Arguments& argus)
{
    return testing_dot_batched<T, true>(argus);
}