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

#pragma once

#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_geam_strided_batched_bad_arg(const Arguments& arg)
{
    auto rocblas_geam_strided_batched_fn = arg.fortran ? rocblas_geam_strided_batched<T, true>
                                                       : rocblas_geam_strided_batched<T, false>;

    const rocblas_int M = 100;
    const rocblas_int N = 100;

    const rocblas_int lda = 100;
    const rocblas_int ldb = 100;
    const rocblas_int ldc = 100;

    const rocblas_int batch_count = 5;

    const T h_alpha = 1.0;
    const T h_beta  = 1.0;

    const rocblas_operation transA = rocblas_operation_none;
    const rocblas_operation transB = rocblas_operation_none;

    const rocblas_stride stride_a = size_t(lda) * (transA == rocblas_operation_none ? N : M);
    const rocblas_stride stride_b = size_t(ldb) * (transB == rocblas_operation_none ? N : M);
    const rocblas_stride stride_c = size_t(ldc) * N;

    rocblas_local_handle handle{arg};

    size_t size_A = size_t(batch_count) * size_t(stride_a);
    size_t size_B = size_t(batch_count) * size_t(stride_b);
    size_t size_C = size_t(batch_count) * size_t(stride_c);

    // allocate memory on device
    device_vector<T> dA(size_A);
    device_vector<T> dB(size_B);
    device_vector<T> dC(size_C);
    CHECK_DEVICE_ALLOCATION(dA.memcheck());
    CHECK_DEVICE_ALLOCATION(dB.memcheck());
    CHECK_DEVICE_ALLOCATION(dC.memcheck());

    EXPECT_ROCBLAS_STATUS(rocblas_geam_strided_batched_fn(handle,
                                                          transA,
                                                          transB,
                                                          M,
                                                          N,
                                                          &h_alpha,
                                                          nullptr,
                                                          lda,
                                                          stride_a,
                                                          &h_beta,
                                                          dB,
                                                          ldb,
                                                          stride_b,
                                                          dC,
                                                          ldc,
                                                          stride_c,
                                                          batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_geam_strided_batched_fn(handle,
                                                          transA,
                                                          transB,
                                                          M,
                                                          N,
                                                          &h_alpha,
                                                          dA,
                                                          lda,
                                                          stride_a,
                                                          &h_beta,
                                                          nullptr,
                                                          ldb,
                                                          stride_b,
                                                          dC,
                                                          ldc,
                                                          stride_c,
                                                          batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_geam_strided_batched_fn(handle,
                                                          transA,
                                                          transB,
                                                          M,
                                                          N,
                                                          &h_alpha,
                                                          dA,
                                                          lda,
                                                          stride_a,
                                                          &h_beta,
                                                          dB,
                                                          ldb,
                                                          stride_b,
                                                          nullptr,
                                                          ldc,
                                                          stride_c,
                                                          batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_geam_strided_batched_fn(handle,
                                                          transA,
                                                          transB,
                                                          M,
                                                          N,
                                                          nullptr,
                                                          dA,
                                                          lda,
                                                          stride_a,
                                                          &h_beta,
                                                          dB,
                                                          ldb,
                                                          stride_b,
                                                          dC,
                                                          ldc,
                                                          stride_c,
                                                          batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_geam_strided_batched_fn(handle,
                                                          transA,
                                                          transB,
                                                          M,
                                                          N,
                                                          &h_alpha,
                                                          dA,
                                                          lda,
                                                          stride_a,
                                                          nullptr,
                                                          dB,
                                                          ldb,
                                                          stride_b,
                                                          dC,
                                                          ldc,
                                                          stride_c,
                                                          batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_geam_strided_batched_fn(nullptr,
                                                          transA,
                                                          transB,
                                                          M,
                                                          N,
                                                          &h_alpha,
                                                          dA,
                                                          lda,
                                                          stride_a,
                                                          &h_beta,
                                                          dB,
                                                          ldb,
                                                          stride_b,
                                                          dC,
                                                          ldc,
                                                          stride_c,
                                                          batch_count),
                          rocblas_status_invalid_handle);
}

template <typename T>
void testing_geam_strided_batched(const Arguments& arg)
{
    auto rocblas_geam_strided_batched_fn = arg.fortran ? rocblas_geam_strided_batched<T, true>
                                                       : rocblas_geam_strided_batched<T, false>;

    rocblas_operation transA = char2rocblas_operation(arg.transA);
    rocblas_operation transB = char2rocblas_operation(arg.transB);

    rocblas_int M = arg.M;
    rocblas_int N = arg.N;

    rocblas_int    lda         = arg.lda;
    rocblas_int    ldb         = arg.ldb;
    rocblas_int    ldc         = arg.ldc;
    rocblas_stride stride_a    = arg.stride_a;
    rocblas_stride stride_b    = arg.stride_b;
    rocblas_stride stride_c    = arg.stride_c;
    rocblas_int    batch_count = arg.batch_count;

    T alpha = arg.get_alpha<T>();
    T beta  = arg.get_beta<T>();

    T* dC_in_place;

    rocblas_int A_row, A_col, B_row, B_col;
    rocblas_int inc1_A, inc2_A, inc1_B, inc2_B;

    double gpu_time_used, cpu_time_used;
    gpu_time_used = cpu_time_used = 0.0;

    double rocblas_error_1 = std::numeric_limits<double>::max();
    double rocblas_error_2 = std::numeric_limits<double>::max();
    double rocblas_error   = std::numeric_limits<double>::max();

    rocblas_local_handle handle{arg};

    if(transA == rocblas_operation_none)
    {
        A_row  = M;
        A_col  = N;
        inc1_A = 1;
        inc2_A = lda;
    }
    else
    {
        A_row  = N;
        A_col  = M;
        inc1_A = lda;
        inc2_A = 1;
    }
    if(transB == rocblas_operation_none)
    {
        B_row  = M;
        B_col  = N;
        inc1_B = 1;
        inc2_B = ldb;
    }
    else
    {
        B_row  = N;
        B_col  = M;
        inc1_B = ldb;
        inc2_B = 1;
    }

    if(stride_a < lda * (transA == rocblas_operation_none ? N : M))
        rocblas_cout << "WARNING: stride_a < lda * (transA == rocblas_operation_none ? N : M)"
                     << std::endl;
    if(stride_b < ldb * (transB == rocblas_operation_none ? N : M))
        rocblas_cout << "WARNING: stride_b < ldb * (transB == rocblas_operation_none ? N : M)"
                     << std::endl;
    if(stride_c < ldc * N)
        rocblas_cout << "WARNING: stride_c < ldc * N)" << std::endl;
    size_t size_A = size_t(batch_count) * size_t(stride_a);
    size_t size_B = size_t(batch_count) * size_t(stride_b);
    size_t size_C = size_t(batch_count) * size_t(stride_c);

    // argument sanity check before allocating invalid memory
    bool invalid_size = M < 0 || N < 0 || lda < A_row || ldb < B_row || ldc < M || batch_count < 0;
    if(invalid_size || !M || !N || !batch_count)
    {
        EXPECT_ROCBLAS_STATUS(rocblas_geam_strided_batched_fn(handle,
                                                              transA,
                                                              transB,
                                                              M,
                                                              N,
                                                              nullptr,
                                                              nullptr,
                                                              lda,
                                                              stride_a,
                                                              nullptr,
                                                              nullptr,
                                                              ldb,
                                                              stride_b,
                                                              nullptr,
                                                              ldc,
                                                              stride_c,
                                                              batch_count),
                              invalid_size ? rocblas_status_invalid_size : rocblas_status_success);
        return;
    }

    // Naming: dX is in GPU (device) memory. hK is in CPU (host) memory
    host_vector<T> h_alpha(1);
    host_vector<T> h_beta(1);
    host_vector<T> hA(size_A), hA_copy(size_A);
    host_vector<T> hB(size_B), hB_copy(size_B);
    host_vector<T> hC_1(size_C);
    host_vector<T> hC_2(size_C);
    host_vector<T> hC_gold(size_C);
    CHECK_HIP_ERROR(h_alpha.memcheck());
    CHECK_HIP_ERROR(h_beta.memcheck());
    CHECK_HIP_ERROR(hA.memcheck());
    CHECK_HIP_ERROR(hB.memcheck());
    CHECK_HIP_ERROR(hC_1.memcheck());
    CHECK_HIP_ERROR(hC_2.memcheck());
    CHECK_HIP_ERROR(hC_gold.memcheck());

    // Initial Data on CPU
    h_alpha[0] = alpha;
    h_beta[0]  = beta;

    // Initialize data on host memory
    rocblas_init_matrix(
        hA, arg, A_row, A_col, lda, stride_a, batch_count, rocblas_client_alpha_sets_nan, true);
    rocblas_init_matrix(
        hB, arg, B_row, B_col, ldb, stride_b, batch_count, rocblas_client_beta_sets_nan);

    hA_copy = hA;
    hB_copy = hB;

    // allocate memory on device
    device_vector<T> dA(size_A);
    device_vector<T> dB(size_B);
    device_vector<T> dC(size_C);
    device_vector<T> d_alpha(1);
    device_vector<T> d_beta(1);
    CHECK_DEVICE_ALLOCATION(dA.memcheck());
    CHECK_DEVICE_ALLOCATION(dB.memcheck());
    CHECK_DEVICE_ALLOCATION(dC.memcheck());
    CHECK_DEVICE_ALLOCATION(d_alpha.memcheck());
    CHECK_DEVICE_ALLOCATION(d_beta.memcheck());

    // copy data from CPU to device
    CHECK_HIP_ERROR(d_alpha.transfer_from(h_alpha));
    CHECK_HIP_ERROR(d_beta.transfer_from(h_beta));
    CHECK_HIP_ERROR(dA.transfer_from(hA));
    CHECK_HIP_ERROR(dB.transfer_from(hB));

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

        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));
        CHECK_ROCBLAS_ERROR(rocblas_geam_strided_batched_fn(handle,
                                                            transA,
                                                            transB,
                                                            M,
                                                            N,
                                                            &alpha,
                                                            dA,
                                                            lda,
                                                            stride_a,
                                                            &beta,
                                                            dB,
                                                            ldb,
                                                            stride_b,
                                                            dC,
                                                            ldc,
                                                            stride_c,
                                                            batch_count));

        CHECK_HIP_ERROR(hC_1.transfer_from(dC));

        rocblas_init<T>(hC_2);
        CHECK_HIP_ERROR(dC.transfer_from(hC_2));

        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_device));

        CHECK_ROCBLAS_ERROR(rocblas_geam_strided_batched_fn(handle,
                                                            transA,
                                                            transB,
                                                            M,
                                                            N,
                                                            d_alpha,
                                                            dA,
                                                            lda,
                                                            stride_a,
                                                            d_beta,
                                                            dB,
                                                            ldb,
                                                            stride_b,
                                                            dC,
                                                            ldc,
                                                            stride_c,
                                                            batch_count));

        // reference calculation for golden result
        cpu_time_used = get_time_us_no_sync();

        for(size_t b = 0; b < batch_count; b++)
        {
            cblas_geam(transA,
                       transB,
                       M,
                       N,
                       (T*)h_alpha,
                       (T*)hA + b * stride_a,
                       lda,
                       (T*)h_beta,
                       (T*)hB + b * stride_b,
                       ldb,
                       (T*)hC_gold + b * stride_c,
                       ldc);
        }

        cpu_time_used = get_time_us_no_sync() - cpu_time_used;

        // fetch GPU
        CHECK_HIP_ERROR(hC_2.transfer_from(dC));

        if(arg.unit_check)
        {
            unit_check_general<T>(M, N, ldc, stride_c, hC_gold, hC_1, batch_count);
            unit_check_general<T>(M, N, ldc, stride_c, hC_gold, hC_2, batch_count);
        }

        if(arg.norm_check)
        {
            rocblas_error_1
                = norm_check_general<T>('F', M, N, ldc, stride_c, hC_gold, hC_1, batch_count);
            rocblas_error_2
                = norm_check_general<T>('F', M, N, ldc, stride_c, hC_gold, hC_2, batch_count);
        }

        // inplace check for dC == dA
        {
            dC_in_place = dA;

            CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));
            auto status_h = rocblas_geam_strided_batched_fn(handle,
                                                            transA,
                                                            transB,
                                                            M,
                                                            N,
                                                            &alpha,
                                                            dA,
                                                            lda,
                                                            stride_a,
                                                            &beta,
                                                            dB,
                                                            ldb,
                                                            stride_b,
                                                            dC_in_place,
                                                            ldc,
                                                            stride_c,
                                                            batch_count);

            if(lda != ldc || transA != rocblas_operation_none)
            {
                EXPECT_ROCBLAS_STATUS(status_h, rocblas_status_invalid_size);
            }
            else
            {
                CHECK_HIP_ERROR(
                    hipMemcpy(hC_1, dC_in_place, sizeof(T) * size_C, hipMemcpyDeviceToHost));
                // dA was clobbered by dC_in_place, so copy hA back to dA
                CHECK_HIP_ERROR(dA.transfer_from(hA));

                // reference calculation
                for(int b = 0; b < batch_count; b++)
                {
                    cblas_geam(transA,
                               transB,
                               M,
                               N,
                               (T*)h_alpha,
                               (T*)hA_copy + b * stride_a,
                               lda,
                               (T*)h_beta,
                               (T*)hB_copy + b * stride_b,
                               ldb,
                               (T*)hC_gold + b * stride_c,
                               ldc);
                }

                if(arg.unit_check)
                {
                    unit_check_general<T>(M, N, ldc, stride_c, hC_gold, hC_1, batch_count);
                }

                if(arg.norm_check)
                {
                    rocblas_error = norm_check_general<T>(
                        'F', M, N, ldc, stride_c, hC_gold, hC_1, batch_count);
                }
            }
        }

        // inplace check for dC == dB
        {
            dC_in_place = dB;

            CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));
            auto status_h = rocblas_geam_strided_batched_fn(handle,
                                                            transA,
                                                            transB,
                                                            M,
                                                            N,
                                                            &alpha,
                                                            dA,
                                                            lda,
                                                            stride_a,
                                                            &beta,
                                                            dB,
                                                            ldb,
                                                            stride_b,
                                                            dC_in_place,
                                                            ldc,
                                                            stride_c,
                                                            batch_count);

            if(ldb != ldc || transB != rocblas_operation_none)
            {
                EXPECT_ROCBLAS_STATUS(status_h, rocblas_status_invalid_size);
            }
            else
            {
                CHECK_ROCBLAS_ERROR(status_h);

                CHECK_HIP_ERROR(
                    hipMemcpy(hC_1, dC_in_place, sizeof(T) * size_C, hipMemcpyDeviceToHost));

                // reference calculation
                for(int b = 0; b < batch_count; b++)
                {
                    cblas_geam(transA,
                               transB,
                               M,
                               N,
                               (T*)h_alpha,
                               (T*)hA_copy + b * stride_a,
                               lda,
                               (T*)h_beta,
                               (T*)hB_copy + b * stride_b,
                               ldb,
                               (T*)hC_gold + b * stride_c,
                               ldc);
                }

                if(arg.unit_check)
                {
                    unit_check_general<T>(M, N, ldc, stride_c, hC_gold, hC_1, batch_count);
                }

                if(arg.norm_check)
                {
                    rocblas_error = norm_check_general<T>(
                        'F', M, N, ldc, stride_c, hC_gold, hC_1, batch_count);
                }
            }
        }

    } // end of if unit/norm check

    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 i = 0; i < number_cold_calls; i++)
        {
            rocblas_geam_strided_batched_fn(handle,
                                            transA,
                                            transB,
                                            M,
                                            N,
                                            &alpha,
                                            dA,
                                            lda,
                                            stride_a,
                                            &beta,
                                            dB,
                                            ldb,
                                            stride_b,
                                            dC,
                                            ldc,
                                            stride_c,
                                            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 i = 0; i < number_hot_calls; i++)
        {
            rocblas_geam_strided_batched_fn(handle,
                                            transA,
                                            transB,
                                            M,
                                            N,
                                            &alpha,
                                            dA,
                                            lda,
                                            stride_a,
                                            &beta,
                                            dB,
                                            ldb,
                                            stride_b,
                                            dC,
                                            ldc,
                                            stride_c,
                                            batch_count);
        }
        gpu_time_used = get_time_us_sync(stream) - gpu_time_used;

        ArgumentModel<e_transA,
                      e_transB,
                      e_M,
                      e_N,
                      e_alpha,
                      e_lda,
                      e_stride_a,
                      e_beta,
                      e_ldb,
                      e_stride_b,
                      e_ldc,
                      e_stride_c,
                      e_batch_count>{}
            .log_args<T>(rocblas_cout,
                         arg,
                         gpu_time_used,
                         geam_gflop_count<T>(M, N),
                         ArgumentLogging::NA_value,
                         cpu_time_used,
                         rocblas_error_1,
                         rocblas_error_2);
    }
}