/* ************************************************************************
 * Copyright 2018-2021 Advanced Micro Devices, Inc.
 * ************************************************************************ */

#pragma once

#include "bytes.hpp"
#include "cblas_interface.hpp"
#include "flops.hpp"
#include "norm.hpp"
#include "rocblas.hpp"
#include "rocblas_init.hpp"
#include "rocblas_math.hpp"
#include "rocblas_random.hpp"
#include "rocblas_test.hpp"
#include "rocblas_vector.hpp"
#include "unit.hpp"
#include "utility.hpp"

template <typename T>
void testing_copy_bad_arg(const Arguments& arg)
{
    const bool FORTRAN         = arg.fortran;
    auto       rocblas_copy_fn = FORTRAN ? rocblas_copy<T, true> : rocblas_copy<T, false>;

    rocblas_int         N         = 100;
    rocblas_int         incx      = 1;
    rocblas_int         incy      = 1;
    static const size_t safe_size = 100; //  arbitrarily set to 100

    rocblas_local_handle handle{arg};
    device_vector<T>     dx(safe_size);
    device_vector<T>     dy(safe_size);
    CHECK_DEVICE_ALLOCATION(dx.memcheck());
    CHECK_DEVICE_ALLOCATION(dy.memcheck());

    EXPECT_ROCBLAS_STATUS(rocblas_copy_fn(handle, N, nullptr, incx, dy, incy),
                          rocblas_status_invalid_pointer);
    EXPECT_ROCBLAS_STATUS(rocblas_copy_fn(handle, N, dx, incx, nullptr, incy),
                          rocblas_status_invalid_pointer);
    EXPECT_ROCBLAS_STATUS(rocblas_copy_fn(nullptr, N, dx, incx, dy, incy),
                          rocblas_status_invalid_handle);
}

template <typename T>
void testing_copy(const Arguments& arg)
{
    const bool FORTRAN         = arg.fortran;
    auto       rocblas_copy_fn = FORTRAN ? rocblas_copy<T, true> : rocblas_copy<T, false>;

    rocblas_int          N    = arg.N;
    rocblas_int          incx = arg.incx;
    rocblas_int          incy = arg.incy;
    rocblas_local_handle handle{arg};

    // argument sanity check before allocating invalid memory
    if(N <= 0)
    {
        CHECK_ROCBLAS_ERROR(rocblas_copy_fn(handle, N, nullptr, incx, nullptr, incy));
        return;
    }

    rocblas_int abs_incx = incx >= 0 ? incx : -incx;
    rocblas_int abs_incy = incy >= 0 ? incy : -incy;
    size_t      size_x   = N * size_t(abs_incx);
    size_t      size_y   = N * size_t(abs_incy);
    if(!size_x)
        size_x = 1;
    if(!size_y)
        size_y = 1;

    // allocate memory on device
    device_vector<T> dx(size_x);
    device_vector<T> dy(size_y);
    CHECK_DEVICE_ALLOCATION(dx.memcheck());
    CHECK_DEVICE_ALLOCATION(dy.memcheck());

    // Naming: dX is in GPU (device) memory. hK is in CPU (host) memory, plz follow this practice
    host_vector<T> hx(size_x);
    host_vector<T> hy(size_y);
    host_vector<T> hy_gold(size_y);

    // Initialize data on host memory
    rocblas_init_vector(hx, arg, N, abs_incx, 0, 1, rocblas_client_alpha_sets_nan, true);
    rocblas_init_vector(hy, arg, N, abs_incy, 0, 1, rocblas_client_alpha_sets_nan, false);

    // copy vector is easy in STL; hy_gold = hx: save a copy in hy_gold which will be output of CPU
    // BLAS
    hy_gold = hy;

    // copy data from CPU to device
    CHECK_HIP_ERROR(hipMemcpy(dx, hx, sizeof(T) * size_x, hipMemcpyHostToDevice));
    CHECK_HIP_ERROR(hipMemcpy(dy, hy, sizeof(T) * size_y, hipMemcpyHostToDevice));

    double gpu_time_used, cpu_time_used;
    double rocblas_error = 0.0;

    if(arg.unit_check || arg.norm_check)
    {
        // GPU BLAS
        CHECK_ROCBLAS_ERROR(rocblas_copy_fn(handle, N, dx, incx, dy, incy));
        CHECK_HIP_ERROR(hipMemcpy(hy, dy, sizeof(T) * size_y, hipMemcpyDeviceToHost));

        // CPU BLAS
        cpu_time_used = get_time_us_no_sync();
        cblas_copy<T>(N, hx, incx, hy_gold, incy);
        cpu_time_used = get_time_us_no_sync() - cpu_time_used;

        if(arg.unit_check)
        {
            unit_check_general<T>(1, N, abs_incy, hy_gold, hy);
        }

        if(arg.norm_check)
        {
            rocblas_error = norm_check_general<T>('F', 1, N, abs_incy, hy_gold, hy);
        }
    }

    if(arg.timing)
    {
        int number_cold_calls = arg.cold_iters;
        int number_hot_calls  = arg.iters;

        for(int iter = 0; iter < number_cold_calls; iter++)
        {
            rocblas_copy_fn(handle, N, dx, incx, dy, incy);
        }

        hipStream_t stream;
        CHECK_ROCBLAS_ERROR(rocblas_get_stream(handle, &stream));
        gpu_time_used = get_time_us_sync(stream); // in microseconds

        for(int iter = 0; iter < number_hot_calls; iter++)
        {
            rocblas_copy_fn(handle, N, dx, incx, dy, incy);
        }

        gpu_time_used = get_time_us_sync(stream) - gpu_time_used;

        ArgumentModel<e_N, e_incx, e_incy>{}.log_args<T>(rocblas_cout,
                                                         arg,
                                                         gpu_time_used,
                                                         ArgumentLogging::NA_value,
                                                         copy_gbyte_count<T>(N),
                                                         cpu_time_used,
                                                         rocblas_error);
    }
}