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

#pragma once

#include "cblas_interface.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_rotm_batched_bad_arg(const Arguments& arg)
{
    const bool FORTRAN = arg.fortran;
    auto       rocblas_rotm_batched_fn
        = FORTRAN ? rocblas_rotm_batched<T, true> : rocblas_rotm_batched<T, false>;

    rocblas_int N           = 100;
    rocblas_int incx        = 1;
    rocblas_int incy        = 1;
    rocblas_int batch_count = 5;

    rocblas_local_handle   handle{arg};
    device_batch_vector<T> dx(N, incx, batch_count);
    device_batch_vector<T> dy(N, incy, batch_count);
    device_batch_vector<T> dparam(1, 1, batch_count);
    CHECK_DEVICE_ALLOCATION(dx.memcheck());
    CHECK_DEVICE_ALLOCATION(dy.memcheck());
    CHECK_DEVICE_ALLOCATION(dparam.memcheck());

    CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_device));
    EXPECT_ROCBLAS_STATUS((rocblas_rotm_batched_fn(nullptr,
                                                   N,
                                                   dx.ptr_on_device(),
                                                   incx,
                                                   dy.ptr_on_device(),
                                                   incy,
                                                   dparam.ptr_on_device(),
                                                   batch_count)),
                          rocblas_status_invalid_handle);
    EXPECT_ROCBLAS_STATUS((rocblas_rotm_batched_fn(handle,
                                                   N,
                                                   nullptr,
                                                   incx,
                                                   dy.ptr_on_device(),
                                                   incy,
                                                   dparam.ptr_on_device(),
                                                   batch_count)),
                          rocblas_status_invalid_pointer);
    EXPECT_ROCBLAS_STATUS((rocblas_rotm_batched_fn(handle,
                                                   N,
                                                   dx.ptr_on_device(),
                                                   incx,
                                                   nullptr,
                                                   incy,
                                                   dparam.ptr_on_device(),
                                                   batch_count)),
                          rocblas_status_invalid_pointer);
    EXPECT_ROCBLAS_STATUS(
        (rocblas_rotm_batched_fn(
            handle, N, dx.ptr_on_device(), incx, dy.ptr_on_device(), incy, nullptr, batch_count)),
        rocblas_status_invalid_pointer);
}

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

    rocblas_int N           = arg.N;
    rocblas_int incx        = arg.incx;
    rocblas_int incy        = arg.incy;
    rocblas_int batch_count = arg.batch_count;

    rocblas_local_handle handle{arg};
    double               gpu_time_used, cpu_time_used;
    double norm_error_host_x = 0.0, norm_error_host_y = 0.0, norm_error_device_x = 0.0,
           norm_error_device_y = 0.0;
    const T rel_error          = std::numeric_limits<T>::epsilon() * 1000;

    // check to prevent undefined memory allocation error
    if(N <= 0 || batch_count <= 0)
    {
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_device));
        CHECK_ROCBLAS_ERROR((rocblas_rotm_batched_fn(
            handle, N, nullptr, incx, nullptr, incy, nullptr, batch_count)));
        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);

    device_batch_vector<T> dx(N, incx, batch_count);
    device_batch_vector<T> dy(N, incy, batch_count);
    device_batch_vector<T> dparam(5, 1, batch_count);
    CHECK_DEVICE_ALLOCATION(dx.memcheck());
    CHECK_DEVICE_ALLOCATION(dy.memcheck());
    CHECK_DEVICE_ALLOCATION(dparam.memcheck());

    // Initial Data on CPU
    host_batch_vector<T> hx(N, incx, batch_count);
    host_batch_vector<T> hy(N, incy, batch_count);
    host_batch_vector<T> hdata(4, 1, batch_count);
    host_batch_vector<T> hparam(5, 1, batch_count);

    // 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);
    rocblas_init_vector(hdata, arg, rocblas_client_alpha_sets_nan, false);

    for(int b = 0; b < batch_count; b++)
    {
        // CPU BLAS reference data
        cblas_rotmg<T>(&hdata[b][0], &hdata[b][1], &hdata[b][2], &hdata[b][3], hparam[b]);
    }

    constexpr int FLAG_COUNT        = 4;
    const T       FLAGS[FLAG_COUNT] = {-1, 0, 1, -2};

    for(int i = 0; i < FLAG_COUNT; i++)
    {
        for(int b = 0; b < batch_count; b++)
            hparam[b][0] = FLAGS[i];

        host_batch_vector<T> cx(N, incx, batch_count);
        host_batch_vector<T> cy(N, incy, batch_count);
        cx.copy_from(hx);
        cy.copy_from(hy);
        cpu_time_used = get_time_us_no_sync();
        for(int b = 0; b < batch_count; b++)
        {
            cblas_rotm<T>(N, cx[b], incx, cy[b], incy, hparam[b]);
        }
        cpu_time_used = get_time_us_no_sync() - cpu_time_used;

        if(arg.unit_check || arg.norm_check)
        {
            // Test rocblas_pointer_mode_host
            // TODO: THIS IS NO LONGER SUPPORTED
            // {
            //     CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));
            //     for(int b = 0; b < batch_count; b++)
            //     {
            //         CHECK_HIP_ERROR(
            //             hipMemcpy(bx[b], hx[b], sizeof(T) * size_x, hipMemcpyHostToDevice));
            //         CHECK_HIP_ERROR(
            //             hipMemcpy(by[b], hy[b], sizeof(T) * size_y, hipMemcpyHostToDevice));
            //     }
            //     CHECK_HIP_ERROR(hipMemcpy(dx, bx, sizeof(T*) * batch_count, hipMemcpyHostToDevice));
            //     CHECK_HIP_ERROR(hipMemcpy(dy, by, sizeof(T*) * batch_count, hipMemcpyHostToDevice));

            //     CHECK_ROCBLAS_ERROR(
            //         (rocblas_rotm_batched_fn(handle, N, dx, incx, dy, incy, hparam, batch_count)));

            //     host_vector<T> rx[batch_count];
            //     host_vector<T> ry[batch_count];
            //     for(int b = 0; b < batch_count; b++)
            //     {
            //         rx[b] = host_vector<T>(size_x);
            //         ry[b] = host_vector<T>(size_y);
            //         CHECK_HIP_ERROR(
            //             hipMemcpy(rx[b], bx[b], sizeof(T) * size_x, hipMemcpyDeviceToHost));
            //         CHECK_HIP_ERROR(
            //             hipMemcpy(ry[b], by[b], sizeof(T) * size_y, hipMemcpyDeviceToHost));
            //     }

            //     if(arg.unit_check)
            //     {
            //         T rel_error = std::numeric_limits<T>::epsilon() * 1000;
            //         near_check_general<T,T>(1, N, batch_count, incx, cx, rx, rel_error);
            //         near_check_general<T,T>(1, N, batch_count, incy, cy, ry, rel_error);
            //     }
            //     if(arg.norm_check)
            //     {
            //         norm_error_host_x = norm_check_general<T>('F', 1, N, batch_count, incx, cx, rx);
            //         norm_error_host_y = norm_check_general<T>('F', 1, N, batch_count, incy, cy, ry);
            //     }
            // }

            // Test rocblas_pointer_mode_device
            {
                CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_device));
                CHECK_HIP_ERROR(dx.transfer_from(hx));
                CHECK_HIP_ERROR(dy.transfer_from(hy));
                CHECK_HIP_ERROR(dparam.transfer_from(hparam));

                CHECK_ROCBLAS_ERROR((rocblas_rotm_batched_fn(handle,
                                                             N,
                                                             dx.ptr_on_device(),
                                                             incx,
                                                             dy.ptr_on_device(),
                                                             incy,
                                                             dparam.ptr_on_device(),
                                                             batch_count)));

                host_batch_vector<T> rx(N, incx, batch_count);
                host_batch_vector<T> ry(N, incy, batch_count);
                CHECK_HIP_ERROR(rx.transfer_from(dx));
                CHECK_HIP_ERROR(ry.transfer_from(dy));

                //when (input vectors are initialized with NaN's) the resultant output vector for both the cblas and rocBLAS are NAn's.  The `near_check_general` function compares the output of both the results (i.e., Nan's) and
                //throws an error. That is the reason why it is enclosed in an `if(!rocblas_isnan(arg.alpha))` loop to skip the check.
                if(!rocblas_isnan(arg.alpha))
                {
                    if(arg.unit_check)
                    {
                        near_check_general<T>(1, N, abs_incx, cx, rx, batch_count, rel_error);
                        near_check_general<T>(1, N, abs_incy, cy, ry, batch_count, rel_error);
                    }
                }

                if(arg.norm_check)
                {
                    norm_error_device_x
                        += norm_check_general<T>('F', 1, N, abs_incx, cx, rx, batch_count);
                    norm_error_device_y
                        += norm_check_general<T>('F', 1, N, abs_incy, cy, ry, batch_count);
                }
            }
        }
    }
    if(arg.timing)
    {
        // Initializing flag value to -1 for all the batches of hparam
        for(int b = 0; b < batch_count; b++)
            hparam[b][0] = FLAGS[0];

        int number_cold_calls = arg.cold_iters;
        int number_hot_calls  = arg.iters;
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_device));
        CHECK_HIP_ERROR(dx.transfer_from(hx));
        CHECK_HIP_ERROR(dy.transfer_from(hy));
        CHECK_HIP_ERROR(dparam.transfer_from(hparam));

        for(int iter = 0; iter < number_cold_calls; iter++)
        {
            rocblas_rotm_batched_fn(handle,
                                    N,
                                    dx.ptr_on_device(),
                                    incx,
                                    dy.ptr_on_device(),
                                    incy,
                                    dparam.ptr_on_device(),
                                    batch_count);
        }
        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_rotm_batched_fn(handle,
                                    N,
                                    dx.ptr_on_device(),
                                    incx,
                                    dy.ptr_on_device(),
                                    incy,
                                    dparam.ptr_on_device(),
                                    batch_count);
        }
        gpu_time_used = get_time_us_sync(stream) - gpu_time_used;

        ArgumentModel<e_N, e_incx, e_incy, e_batch_count>{}.log_args<T>(
            rocblas_cout,
            arg,
            gpu_time_used,
            rotm_gflop_count<T>(N, hparam[0][0]),
            rotm_gbyte_count<T>(N, hparam[0][0]),
            cpu_time_used,
            norm_error_device_x,
            norm_error_device_y);
    }
}