/* ************************************************************************
 * 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_axpy_batched_bad_arg(const Arguments& arg)
{
    auto rocblas_axpy_batched_fn
        = arg.fortran ? rocblas_axpy_batched<T, true> : rocblas_axpy_batched<T, false>;

    rocblas_local_handle handle{arg};

    rocblas_int N = 100, incx = 1, incy = 1, batch_count = 2;

    T                      alpha = 0.6, zero = 0.0;
    device_batch_vector<T> dx(10, 1, 2);
    CHECK_DEVICE_ALLOCATION(dx.memcheck());
    device_batch_vector<T> dy(10, 1, 2);
    CHECK_DEVICE_ALLOCATION(dy.memcheck());

    EXPECT_ROCBLAS_STATUS(
        rocblas_axpy_batched_fn(
            handle, N, &alpha, nullptr, incx, dy.ptr_on_device(), incy, batch_count),
        rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(
        rocblas_axpy_batched_fn(
            handle, N, &alpha, dx.ptr_on_device(), incx, nullptr, incy, batch_count),
        rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(
        rocblas_axpy_batched_fn(
            handle, N, nullptr, dx.ptr_on_device(), incx, dy.ptr_on_device(), incy, batch_count),
        rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(
        rocblas_axpy_batched_fn(
            nullptr, N, &alpha, dx.ptr_on_device(), incx, dy.ptr_on_device(), incy, batch_count),
        rocblas_status_invalid_handle);

    // When N==0, alpha, X and Y can be nullptr without error
    EXPECT_ROCBLAS_STATUS(
        rocblas_axpy_batched_fn(handle, 0, nullptr, nullptr, incx, nullptr, incy, batch_count),
        rocblas_status_success);

    // When alpha==0, X and Y can be nullptr without error
    EXPECT_ROCBLAS_STATUS(
        rocblas_axpy_batched_fn(handle, N, &zero, nullptr, incx, nullptr, incy, batch_count),
        rocblas_status_success);
}

template <typename T>
void testing_axpy_batched(const Arguments& arg)
{
    auto rocblas_axpy_batched_fn
        = arg.fortran ? rocblas_axpy_batched<T, true> : rocblas_axpy_batched<T, false>;

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

    T h_alpha = arg.get_alpha<T>();

    // argument sanity check before allocating invalid memory
    if(N <= 0 || batch_count <= 0)
    {
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));
        EXPECT_ROCBLAS_STATUS(
            rocblas_axpy_batched_fn(handle, N, nullptr, nullptr, incx, nullptr, incy, batch_count),
            rocblas_status_success);
        return;
    }

    rocblas_int abs_incy = std::abs(incy);

    //
    // Host memory.
    //
    host_batch_vector<T> hx(N, incx ? incx : 1, batch_count), hy(N, incy ? incy : 1, batch_count),
        hy1(N, incy ? incy : 1, batch_count), hy2(N, incy ? incy : 1, batch_count);
    host_vector<T> halpha(1);

    CHECK_HIP_ERROR(hx.memcheck());
    CHECK_HIP_ERROR(hy.memcheck());
    CHECK_HIP_ERROR(hy1.memcheck());
    CHECK_HIP_ERROR(hy2.memcheck());
    CHECK_HIP_ERROR(halpha.memcheck());

    //
    // Device memory.
    //
    device_batch_vector<T> dx(N, incx ? incx : 1, batch_count), dy(N, incy ? incy : 1, batch_count);
    device_vector<T>       dalpha(1);

    CHECK_DEVICE_ALLOCATION(dx.memcheck());
    CHECK_DEVICE_ALLOCATION(dy.memcheck());
    CHECK_DEVICE_ALLOCATION(dalpha.memcheck());

    //
    // Assign host alpha.
    //
    halpha[0] = h_alpha;

    //
    // Initialize data on host memory
    //
    rocblas_init_vector(hx, arg, rocblas_client_alpha_sets_nan, true);
    rocblas_init_vector(hy, arg, rocblas_client_alpha_sets_nan, false);

    //
    // Device memory.
    //
    double gpu_time_used, cpu_time_used;
    double rocblas_error_1 = 0.0;
    double rocblas_error_2 = 0.0;

    if(arg.unit_check || arg.norm_check)
    {

        //
        // Transfer host to device
        //
        CHECK_HIP_ERROR(dx.transfer_from(hx));

        //
        // Call routine with pointer mode on host.
        //

        //
        // Pointer mode.
        //
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));

        //
        // Call routine.
        //
        CHECK_HIP_ERROR(dy.transfer_from(hy));
        CHECK_ROCBLAS_ERROR(rocblas_axpy_batched_fn(
            handle, N, halpha, dx.ptr_on_device(), incx, dy.ptr_on_device(), incy, batch_count));

        //
        // Transfer from device to host.
        //
        CHECK_HIP_ERROR(hy1.transfer_from(dy));

        //
        // Pointer mode.
        //
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_device));

        //
        // Call routine.
        //
        CHECK_HIP_ERROR(dalpha.transfer_from(halpha));
        CHECK_HIP_ERROR(dy.transfer_from(hy));
        CHECK_ROCBLAS_ERROR(rocblas_axpy_batched_fn(
            handle, N, dalpha, dx.ptr_on_device(), incx, dy.ptr_on_device(), incy, batch_count));
        //
        // Transfer from device to host.
        //
        CHECK_HIP_ERROR(hy2.transfer_from(dy));

        //
        // CPU BLAS
        //
        {
            cpu_time_used = get_time_us_no_sync();

            //
            // Compute the host solution.
            //
            for(rocblas_int batch_index = 0; batch_index < batch_count; ++batch_index)
            {
                cblas_axpy<T>(N, h_alpha, hx[batch_index], incx, hy[batch_index], incy);
            }
            cpu_time_used = get_time_us_no_sync() - cpu_time_used;
        }

        //
        // Compare with with hsolution.
        //
        if(arg.unit_check)
        {
            unit_check_general<T>(1, N, abs_incy, hy, hy1, batch_count);

            unit_check_general<T>(1, N, abs_incy, hy, hy2, batch_count);
        }

        if(arg.norm_check)
        {
            rocblas_error_1 = norm_check_general<T>('I', 1, N, abs_incy, hy, hy1, batch_count);
            rocblas_error_2 = norm_check_general<T>('I', 1, N, abs_incy, hy, hy2, batch_count);
        }
    }

    if(arg.timing)
    {
        int number_cold_calls = arg.cold_iters;
        int number_hot_calls  = arg.iters;
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));

        //
        // Transfer from host to device.
        //
        CHECK_HIP_ERROR(dy.transfer_from(hy));

        //
        // Cold.
        //
        for(int iter = 0; iter < number_cold_calls; iter++)
        {
            rocblas_axpy_batched_fn(handle,
                                    N,
                                    &h_alpha,
                                    dx.ptr_on_device(),
                                    incx,
                                    dy.ptr_on_device(),
                                    incy,
                                    batch_count);
        }

        //
        // Transfer from host to device.
        //
        CHECK_HIP_ERROR(dy.transfer_from(hy));

        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_axpy_batched_fn(handle,
                                    N,
                                    &h_alpha,
                                    dx.ptr_on_device(),
                                    incx,
                                    dy.ptr_on_device(),
                                    incy,
                                    batch_count);
        }
        gpu_time_used = get_time_us_sync(stream) - gpu_time_used;

        ArgumentModel<e_N, e_alpha, e_incx, e_incy, e_batch_count>{}.log_args<T>(
            rocblas_cout,
            arg,
            gpu_time_used,
            axpy_gflop_count<T>(N),
            axpy_gbyte_count<T>(N),
            cpu_time_used,
            rocblas_error_1,
            rocblas_error_2);
    }
}