/* ************************************************************************
 * Copyright 2018-2019 Advanced Micro Devices, Inc.
 * ************************************************************************ */

#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, typename U = T, typename V = T>
void testing_rot_batched_bad_arg(const Arguments& arg)
{
    rocblas_int         N           = 100;
    rocblas_int         incx        = 1;
    rocblas_int         incy        = 1;
    rocblas_int         batch_count = 5;
    static const size_t safe_size   = 100;

    rocblas_local_handle    handle;
    device_vector<T*, 0, T> dx(safe_size);
    device_vector<T*, 0, T> dy(safe_size);
    device_vector<U>        dc(1);
    device_vector<V>        ds(1);
    if(!dx || !dy || !dc || !ds)
    {
        CHECK_HIP_ERROR(hipErrorOutOfMemory);
        return;
    }

    EXPECT_ROCBLAS_STATUS(
        (rocblas_rot_batched<T, U, V>(nullptr, N, dx, incx, dy, incy, dc, ds, batch_count)),
        rocblas_status_invalid_handle);
    EXPECT_ROCBLAS_STATUS(
        (rocblas_rot_batched<T, U, V>(handle, N, nullptr, incx, dy, incy, dc, ds, batch_count)),
        rocblas_status_invalid_pointer);
    EXPECT_ROCBLAS_STATUS(
        (rocblas_rot_batched<T, U, V>(handle, N, dx, incx, nullptr, incy, dc, ds, batch_count)),
        rocblas_status_invalid_pointer);
    EXPECT_ROCBLAS_STATUS(
        (rocblas_rot_batched<T, U, V>(handle, N, dx, incx, dy, incy, nullptr, ds, batch_count)),
        rocblas_status_invalid_pointer);
    EXPECT_ROCBLAS_STATUS(
        (rocblas_rot_batched<T, U, V>(handle, N, dx, incx, dy, incy, dc, nullptr, batch_count)),
        rocblas_status_invalid_pointer);
}

template <typename T, typename U = T, typename V = T>
void testing_rot_batched(const Arguments& arg)
{
    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;
    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;

    // check to prevent undefined memory allocation error
    if(N <= 0 || incx <= 0 || incy <= 0 || batch_count <= 0)
    {
        device_vector<T*, 0, T> dx(1);
        device_vector<T*, 0, T> dy(1);
        device_vector<U>        dc(1);
        device_vector<V>        ds(1);
        if(!dx || !dy || !dc || !ds)
        {
            CHECK_HIP_ERROR(hipErrorOutOfMemory);
            return;
        }

        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_device));
        if(batch_count < 0)
            EXPECT_ROCBLAS_STATUS(
                (rocblas_rot_batched<T, U, V>(handle, N, dx, incx, dy, incy, dc, ds, batch_count)),
                rocblas_status_invalid_size);
        else
            CHECK_ROCBLAS_ERROR(
                (rocblas_rot_batched<T, U, V>(handle, N, dx, incx, dy, incy, dc, ds, batch_count)));
        return;
    }

    size_t size_x = N * size_t(incx);
    size_t size_y = N * size_t(incy);

    device_vector<T*, 0, T> dx(batch_count);
    device_vector<T*, 0, T> dy(batch_count);
    device_vector<U>        dc(1);
    device_vector<V>        ds(1);
    if(!dx || !dy || !dc || !ds)
    {
        CHECK_HIP_ERROR(hipErrorOutOfMemory);
        return;
    }

    // Initial Data on CPU
    host_vector<T> hx[batch_count]; //(size_x);
    host_vector<T> hy[batch_count]; //(size_y);
    host_vector<U> hc(1);
    host_vector<V> hs(1);

    device_batch_vector<T> bx(batch_count, size_x);
    device_batch_vector<T> by(batch_count, size_y);

    for(int i = 0; i < batch_count; i++)
    {
        hx[i] = host_vector<T>(size_x);
        hy[i] = host_vector<T>(size_y);
    }

    int last = batch_count - 1;
    if((!bx[last] && size_x) || (!by[last] && size_y))
    {
        CHECK_HIP_ERROR(hipErrorOutOfMemory);
        return;
    }

    rocblas_seedrand();
    for(int b = 0; b < batch_count; b++)
    {
        rocblas_init<T>(hx[b], 1, N, incx);
        rocblas_init<T>(hy[b], 1, N, incy);
    }

    // Random alpha (0 - 10)
    host_vector<rocblas_int> alpha(1);
    rocblas_init<rocblas_int>(alpha, 1, 1, 1);

    // cos and sin of alpha (in rads)
    hc[0] = cos(alpha[0]);
    hs[0] = sin(alpha[0]);

    // CPU BLAS reference data
    host_vector<T> cx[batch_count];
    host_vector<T> cy[batch_count];
    for(int b = 0; b < batch_count; b++)
    {
        cx[b] = hx[b];
        cy[b] = hy[b];
    }
    // cblas_rotg<T, U>(cx, cy, hc, hs);
    // cx[0] = hx[0];
    // cy[0] = hy[0];
    cpu_time_used = get_time_us();
    for(int b = 0; b < batch_count; b++)
    {
        cblas_rot<T, U, V>(N, cx[b], incx, cy[b], incy, hc, hs);
    }
    cpu_time_used = get_time_us() - cpu_time_used;

    if(arg.unit_check || arg.norm_check)
    {
        // Test rocblas_pointer_mode_host
        {
            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_rot_batched<T, U, V>(handle, N, dx, incx, dy, incy, hc, hs, 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)
            {
                unit_check_general<T>(1, N, batch_count, incx, cx, rx);
                unit_check_general<T>(1, N, batch_count, incy, cy, ry);
            }
            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));
            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_HIP_ERROR(hipMemcpy(dc, hc, sizeof(U), hipMemcpyHostToDevice));
            CHECK_HIP_ERROR(hipMemcpy(ds, hs, sizeof(V), hipMemcpyHostToDevice));

            CHECK_ROCBLAS_ERROR(
                (rocblas_rot_batched<T, U, V>(handle, N, dx, incx, dy, incy, dc, ds, 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)
            {
                unit_check_general<T>(1, N, batch_count, incx, cx, rx);
                unit_check_general<T>(1, N, batch_count, incy, cy, ry);
            }
            if(arg.norm_check)
            {
                norm_error_device_x = norm_check_general<T>('F', 1, N, batch_count, incx, cx, rx);
                norm_error_device_y = norm_check_general<T>('F', 1, N, batch_count, incy, cy, ry);
            }
        }
    }

    if(arg.timing)
    {
        int number_cold_calls = 2;
        int number_hot_calls  = 100;
        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));

        for(int iter = 0; iter < number_cold_calls; iter++)
        {
            rocblas_rot_batched<T, U, V>(handle, N, dx, incx, dy, incy, hc, hs, batch_count);
        }
        gpu_time_used = get_time_us(); // in microseconds
        for(int iter = 0; iter < number_hot_calls; iter++)
        {
            rocblas_rot_batched<T, U, V>(handle, N, dx, incx, dy, incy, hc, hs, batch_count);
        }
        gpu_time_used = (get_time_us() - gpu_time_used) / number_hot_calls;

        std::cout << "N,incx,incy,rocblas(us),cpu(us)";
        if(arg.norm_check)
            std::cout
                << ",norm_error_host_x,norm_error_host_y,norm_error_device_x,norm_error_device_y";
        std::cout << std::endl;
        std::cout << N << "," << incx << "," << incy << "," << gpu_time_used << ","
                  << cpu_time_used;
        if(arg.norm_check)
            std::cout << ',' << norm_error_host_x << ',' << norm_error_host_y << ","
                      << norm_error_device_x << "," << norm_error_device_y;
        std::cout << std::endl;
    }
}