/* ************************************************************************
 * 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_datatype2string.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_gbmv_batched_bad_arg(const Arguments& arg)
{
    auto rocblas_gbmv_batched_fn
        = arg.fortran ? rocblas_gbmv_batched<T, true> : rocblas_gbmv_batched<T, false>;

    const rocblas_int M           = 100;
    const rocblas_int N           = 100;
    const rocblas_int KL          = 5;
    const rocblas_int KU          = 5;
    const rocblas_int lda         = 100;
    const rocblas_int incx        = 1;
    const rocblas_int incy        = 1;
    const T           alpha       = 1.0;
    const T           beta        = 1.0;
    const rocblas_int batch_count = 5;
    const rocblas_int safe_size   = 100;

    const rocblas_operation transA = rocblas_operation_none;

    rocblas_local_handle handle{arg};

    // allocate memory on device
    device_batch_vector<T> dA(safe_size, 1, batch_count);
    device_batch_vector<T> dx(safe_size, 1, batch_count);
    device_batch_vector<T> dy(safe_size, 1, batch_count);
    CHECK_DEVICE_ALLOCATION(dA.memcheck());
    CHECK_DEVICE_ALLOCATION(dx.memcheck());
    CHECK_DEVICE_ALLOCATION(dy.memcheck());

    auto dA_dev = dA.ptr_on_device();
    auto dx_dev = dx.ptr_on_device();
    auto dy_dev = dy.ptr_on_device();

    EXPECT_ROCBLAS_STATUS(rocblas_gbmv_batched_fn(handle,
                                                  transA,
                                                  M,
                                                  N,
                                                  KL,
                                                  KU,
                                                  &alpha,
                                                  nullptr,
                                                  lda,
                                                  dx_dev,
                                                  incx,
                                                  &beta,
                                                  dy_dev,
                                                  incy,
                                                  batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_gbmv_batched_fn(handle,
                                                  transA,
                                                  M,
                                                  N,
                                                  KL,
                                                  KU,
                                                  &alpha,
                                                  dA_dev,
                                                  lda,
                                                  nullptr,
                                                  incx,
                                                  &beta,
                                                  dy_dev,
                                                  incy,
                                                  batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_gbmv_batched_fn(handle,
                                                  transA,
                                                  M,
                                                  N,
                                                  KL,
                                                  KU,
                                                  &alpha,
                                                  dA_dev,
                                                  lda,
                                                  dx_dev,
                                                  incx,
                                                  &beta,
                                                  nullptr,
                                                  incy,
                                                  batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_gbmv_batched_fn(handle,
                                                  transA,
                                                  M,
                                                  N,
                                                  KL,
                                                  KU,
                                                  nullptr,
                                                  dA_dev,
                                                  lda,
                                                  dx_dev,
                                                  incx,
                                                  &beta,
                                                  dy_dev,
                                                  incy,
                                                  batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_gbmv_batched_fn(handle,
                                                  transA,
                                                  M,
                                                  N,
                                                  KL,
                                                  KU,
                                                  &alpha,
                                                  dA_dev,
                                                  lda,
                                                  dx_dev,
                                                  incx,
                                                  nullptr,
                                                  dy_dev,
                                                  incy,
                                                  batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_gbmv_batched_fn(nullptr,
                                                  transA,
                                                  M,
                                                  N,
                                                  KL,
                                                  KU,
                                                  &alpha,
                                                  dA_dev,
                                                  lda,
                                                  dx_dev,
                                                  incx,
                                                  &beta,
                                                  dy_dev,
                                                  incy,
                                                  batch_count),
                          rocblas_status_invalid_handle);
}

template <typename T>
void testing_gbmv_batched(const Arguments& arg)
{
    auto rocblas_gbmv_batched_fn
        = arg.fortran ? rocblas_gbmv_batched<T, true> : rocblas_gbmv_batched<T, false>;

    rocblas_int       M           = arg.M;
    rocblas_int       N           = arg.N;
    rocblas_int       KL          = arg.KL;
    rocblas_int       KU          = arg.KU;
    rocblas_int       lda         = arg.lda;
    rocblas_int       incx        = arg.incx;
    rocblas_int       incy        = arg.incy;
    T                 h_alpha     = arg.get_alpha<T>();
    T                 h_beta      = arg.get_beta<T>();
    rocblas_operation transA      = char2rocblas_operation(arg.transA);
    rocblas_int       batch_count = arg.batch_count;

    rocblas_local_handle handle{arg};

    // argument sanity check before allocating invalid memory
    bool invalid_size = M < 0 || N < 0 || lda < KL + KU + 1 || !incx || !incy || batch_count < 0
                        || KL < 0 || KU < 0;
    if(invalid_size || !M || !N || !batch_count)
    {
        EXPECT_ROCBLAS_STATUS(rocblas_gbmv_batched_fn(handle,
                                                      transA,
                                                      M,
                                                      N,
                                                      KL,
                                                      KU,
                                                      nullptr,
                                                      nullptr,
                                                      lda,
                                                      nullptr,
                                                      incx,
                                                      nullptr,
                                                      nullptr,
                                                      incy,
                                                      batch_count),
                              invalid_size ? rocblas_status_invalid_size : rocblas_status_success);
        return;
    }

    size_t size_A = lda * size_t(N);
    size_t size_x, dim_x, abs_incx;
    size_t size_y, dim_y, abs_incy;

    if(transA == rocblas_operation_none)
    {
        dim_x = N;
        dim_y = M;
    }
    else
    {
        dim_x = M;
        dim_y = N;
    }

    abs_incx = incx >= 0 ? incx : -incx;
    abs_incy = incy >= 0 ? incy : -incy;

    size_x = dim_x * abs_incx;
    size_y = dim_y * abs_incy;

    // Host-arrays of pointers to host memory
    host_batch_vector<T> hA(size_A, 1, batch_count);
    host_batch_vector<T> hxA(dim_x, incx, batch_count);
    host_batch_vector<T> hy_1A(dim_y, incy, batch_count);
    host_batch_vector<T> hy_2A(dim_y, incy, batch_count);
    host_batch_vector<T> hy_goldA(dim_y, incy, batch_count);
    host_vector<T>       halpha(1);
    host_vector<T>       hbeta(1);

    CHECK_HIP_ERROR(hA.memcheck());
    CHECK_HIP_ERROR(hxA.memcheck());
    CHECK_HIP_ERROR(hy_1A.memcheck());
    CHECK_HIP_ERROR(hy_2A.memcheck());
    CHECK_HIP_ERROR(hy_goldA.memcheck());
    CHECK_HIP_ERROR(halpha.memcheck());
    CHECK_HIP_ERROR(hbeta.memcheck());
    halpha[0] = h_alpha;
    hbeta[0]  = h_beta;

    device_batch_vector<T> AA(size_A, 1, batch_count);
    device_batch_vector<T> xA(dim_x, incx, batch_count);
    device_batch_vector<T> y_1A(dim_y, incy, batch_count);
    device_batch_vector<T> y_2A(dim_y, incy, batch_count);

    device_vector<T> d_alpha(1);
    device_vector<T> d_beta(1);

    CHECK_DEVICE_ALLOCATION(AA.memcheck());
    CHECK_DEVICE_ALLOCATION(xA.memcheck());
    CHECK_DEVICE_ALLOCATION(y_1A.memcheck());
    CHECK_DEVICE_ALLOCATION(y_2A.memcheck());
    CHECK_DEVICE_ALLOCATION(d_alpha.memcheck());
    CHECK_DEVICE_ALLOCATION(d_beta.memcheck());

    // Initialize data on host memory
    rocblas_init_vector(hA, arg, rocblas_client_alpha_sets_nan, true);
    rocblas_init_vector(hxA, arg, rocblas_client_alpha_sets_nan, false, true);
    rocblas_init_vector(hy_1A, arg, rocblas_client_beta_sets_nan);

    hy_2A.copy_from(hy_1A);
    hy_goldA.copy_from(hy_1A);

    CHECK_HIP_ERROR(AA.transfer_from(hA));
    CHECK_HIP_ERROR(xA.transfer_from(hxA));
    CHECK_HIP_ERROR(y_1A.transfer_from(hy_1A));
    CHECK_HIP_ERROR(y_2A.transfer_from(hy_2A));
    CHECK_HIP_ERROR(d_alpha.transfer_from(halpha));
    CHECK_HIP_ERROR(d_beta.transfer_from(hbeta));

    double gpu_time_used, cpu_time_used;
    double rocblas_error_1;
    double rocblas_error_2;

    /* =====================================================================
           ROCBLAS
    =================================================================== */
    if(arg.unit_check || arg.norm_check)
    {

        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));
        CHECK_ROCBLAS_ERROR(rocblas_gbmv_batched_fn(handle,
                                                    transA,
                                                    M,
                                                    N,
                                                    KL,
                                                    KU,
                                                    &h_alpha,
                                                    AA.ptr_on_device(),
                                                    lda,
                                                    xA.ptr_on_device(),
                                                    incx,
                                                    &h_beta,
                                                    y_1A.ptr_on_device(),
                                                    incy,
                                                    batch_count));

        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_device));
        CHECK_ROCBLAS_ERROR(rocblas_gbmv_batched_fn(handle,
                                                    transA,
                                                    M,
                                                    N,
                                                    KL,
                                                    KU,
                                                    d_alpha,
                                                    AA.ptr_on_device(),
                                                    lda,
                                                    xA.ptr_on_device(),
                                                    incx,
                                                    d_beta,
                                                    y_2A.ptr_on_device(),
                                                    incy,
                                                    batch_count));

        // CPU BLAS
        cpu_time_used = get_time_us_no_sync();
        for(int b = 0; b < batch_count; ++b)
        {
            cblas_gbmv<T>(
                transA, M, N, KL, KU, h_alpha, hA[b], lda, hxA[b], incx, h_beta, hy_goldA[b], incy);
        }
        cpu_time_used = get_time_us_no_sync() - cpu_time_used;

        // copy output from device to CPU
        CHECK_HIP_ERROR(hy_1A.transfer_from(y_1A));
        CHECK_HIP_ERROR(hy_2A.transfer_from(y_2A));

        if(arg.unit_check)
        {
            unit_check_general<T>(1, dim_y, abs_incy, hy_goldA, hy_1A, batch_count);
            unit_check_general<T>(1, dim_y, abs_incy, hy_goldA, hy_2A, batch_count);
        }

        if(arg.norm_check)
        {
            rocblas_error_1
                = norm_check_general<T>('F', 1, dim_y, abs_incy, hy_goldA, hy_1A, batch_count);
            rocblas_error_2
                = norm_check_general<T>('F', 1, dim_y, abs_incy, hy_goldA, hy_2A, 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));

        for(int iter = 0; iter < number_cold_calls; iter++)
        {
            rocblas_gbmv_batched_fn(handle,
                                    transA,
                                    M,
                                    N,
                                    KL,
                                    KU,
                                    &h_alpha,
                                    AA.ptr_on_device(),
                                    lda,
                                    xA.ptr_on_device(),
                                    incx,
                                    &h_beta,
                                    y_1A.ptr_on_device(),
                                    incy,
                                    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_gbmv_batched_fn(handle,
                                    transA,
                                    M,
                                    N,
                                    KL,
                                    KU,
                                    &h_alpha,
                                    AA.ptr_on_device(),
                                    lda,
                                    xA.ptr_on_device(),
                                    incx,
                                    &h_beta,
                                    y_1A.ptr_on_device(),
                                    incy,
                                    batch_count);
        }

        gpu_time_used = get_time_us_sync(stream) - gpu_time_used;

        ArgumentModel<e_transA,
                      e_M,
                      e_N,
                      e_KL,
                      e_KU,
                      e_alpha,
                      e_lda,
                      e_incx,
                      e_beta,
                      e_incy,
                      e_batch_count>{}
            .log_args<T>(rocblas_cout,
                         arg,
                         gpu_time_used,
                         gbmv_gflop_count<T>(transA, M, N, KL, KU),
                         gbmv_gbyte_count<T>(transA, M, N, KL, KU),
                         cpu_time_used,
                         rocblas_error_1,
                         rocblas_error_2);
    }
}