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

#pragma once

#include "cblas_interface.hpp"
#include "flops.hpp"
#include "near.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_trmm_outofplace_batched_bad_arg(const Arguments& arg)
{
    auto rocblas_trmm_outofplace_batched_fn = arg.fortran
                                                  ? rocblas_trmm_outofplace_batched<T, true>
                                                  : rocblas_trmm_outofplace_batched<T, false>;

    rocblas_local_handle handle{arg};
    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 = 2;
    const T              alpha       = 1.0;
    const T              zero        = 0.0;

    const rocblas_side      side   = rocblas_side_left;
    const rocblas_fill      uplo   = rocblas_fill_upper;
    const rocblas_operation transA = rocblas_operation_none;
    const rocblas_diagonal  diag   = rocblas_diagonal_non_unit;

    // allocate memory on device
    const size_t           safe_size = 100;
    device_batch_vector<T> dA(safe_size, 1, batch_count);
    device_batch_vector<T> dB(safe_size, 1, batch_count);
    device_batch_vector<T> dC(safe_size, 1, batch_count);

    CHECK_DEVICE_ALLOCATION(dA.memcheck());
    CHECK_DEVICE_ALLOCATION(dB.memcheck());
    CHECK_DEVICE_ALLOCATION(dC.memcheck());

    EXPECT_ROCBLAS_STATUS(rocblas_trmm_outofplace_batched_fn(handle,
                                                             side,
                                                             uplo,
                                                             transA,
                                                             diag,
                                                             M,
                                                             N,
                                                             &alpha,
                                                             nullptr,
                                                             lda,
                                                             dB,
                                                             ldb,
                                                             dC,
                                                             ldc,
                                                             batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_trmm_outofplace_batched_fn(handle,
                                                             side,
                                                             uplo,
                                                             transA,
                                                             diag,
                                                             M,
                                                             N,
                                                             &alpha,
                                                             dA,
                                                             lda,
                                                             nullptr,
                                                             ldb,
                                                             dC,
                                                             ldc,
                                                             batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_trmm_outofplace_batched_fn(handle,
                                                             side,
                                                             uplo,
                                                             transA,
                                                             diag,
                                                             M,
                                                             N,
                                                             &alpha,
                                                             dA,
                                                             lda,
                                                             dB,
                                                             ldb,
                                                             nullptr,
                                                             ldc,
                                                             batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_trmm_outofplace_batched_fn(handle,
                                                             side,
                                                             uplo,
                                                             transA,
                                                             diag,
                                                             M,
                                                             N,
                                                             nullptr,
                                                             dA,
                                                             lda,
                                                             dB,
                                                             ldb,
                                                             dC,
                                                             ldc,
                                                             batch_count),
                          rocblas_status_invalid_pointer);

    EXPECT_ROCBLAS_STATUS(rocblas_trmm_outofplace_batched_fn(nullptr,
                                                             side,
                                                             uplo,
                                                             transA,
                                                             diag,
                                                             M,
                                                             N,
                                                             &alpha,
                                                             dA,
                                                             lda,
                                                             dB,
                                                             ldb,
                                                             dC,
                                                             ldc,
                                                             batch_count),
                          rocblas_status_invalid_handle);

    // When batch_count==0, all pointers may be nullptr without error
    EXPECT_ROCBLAS_STATUS(rocblas_trmm_outofplace_batched_fn(handle,
                                                             side,
                                                             uplo,
                                                             transA,
                                                             diag,
                                                             M,
                                                             N,
                                                             nullptr,
                                                             nullptr,
                                                             lda,
                                                             nullptr,
                                                             ldb,
                                                             nullptr,
                                                             ldc,
                                                             0),
                          rocblas_status_success);

    // When M==0, all pointers may be nullptr without error
    EXPECT_ROCBLAS_STATUS(rocblas_trmm_outofplace_batched_fn(handle,
                                                             side,
                                                             uplo,
                                                             transA,
                                                             diag,
                                                             0,
                                                             N,
                                                             nullptr,
                                                             nullptr,
                                                             lda,
                                                             nullptr,
                                                             ldb,
                                                             nullptr,
                                                             ldc,
                                                             batch_count),
                          rocblas_status_success);

    // When N==0, all pointers may be nullptr without error
    EXPECT_ROCBLAS_STATUS(rocblas_trmm_outofplace_batched_fn(handle,
                                                             side,
                                                             uplo,
                                                             transA,
                                                             diag,
                                                             M,
                                                             0,
                                                             nullptr,
                                                             nullptr,
                                                             lda,
                                                             nullptr,
                                                             ldb,
                                                             nullptr,
                                                             ldc,
                                                             batch_count),
                          rocblas_status_success);
}

template <typename T>
void testing_trmm_outofplace_batched(const Arguments& arg)
{
    auto rocblas_trmm_outofplace_batched_fn = arg.fortran
                                                  ? rocblas_trmm_outofplace_batched<T, true>
                                                  : rocblas_trmm_outofplace_batched<T, false>;

    bool nantest = rocblas_isnan(arg.alpha) || rocblas_isnan(arg.alphai);
    if(!std::is_same<T, float>{} && !std::is_same<T, double>{} && !std::is_same<T, rocblas_half>{}
       && !is_complex<T> && nantest)
        return; // Exclude integers or other types which don't support NaN

    rocblas_local_handle handle{arg};
    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_int          batch_count = arg.batch_count;

    char char_side   = arg.side;
    char char_uplo   = arg.uplo;
    char char_transA = arg.transA;
    char char_diag   = arg.diag;
    T    alpha       = arg.get_alpha<T>();

    rocblas_side      side   = char2rocblas_side(char_side);
    rocblas_fill      uplo   = char2rocblas_fill(char_uplo);
    rocblas_operation transA = char2rocblas_operation(char_transA);
    rocblas_diagonal  diag   = char2rocblas_diagonal(char_diag);

    rocblas_int K      = side == rocblas_side_left ? M : N;
    size_t      size_A = lda * size_t(K);
    size_t      size_B = ldb * size_t(N);
    size_t      size_C = ldc * size_t(N);

    // ensure invalid sizes and quick return checked before pointer check
    bool invalid_size = M < 0 || N < 0 || lda < K || ldb < M || ldc < M || batch_count < 0;
    if(M == 0 || N == 0 || batch_count == 0 || invalid_size)
    {
        EXPECT_ROCBLAS_STATUS(rocblas_trmm_outofplace_batched_fn(handle,
                                                                 side,
                                                                 uplo,
                                                                 transA,
                                                                 diag,
                                                                 M,
                                                                 N,
                                                                 nullptr,
                                                                 nullptr,
                                                                 lda,
                                                                 nullptr,
                                                                 ldb,
                                                                 nullptr,
                                                                 ldc,
                                                                 batch_count),
                              invalid_size ? rocblas_status_invalid_size : rocblas_status_success);
        return;
    }

    double gpu_time_used, cpu_time_used;
    gpu_time_used = cpu_time_used = 0.0;
    double rocblas_error          = 0.0;

    // Naming: dK is in GPU (device) memory. hK is in CPU (host) memory
    host_vector<T>       h_alpha(1);
    host_batch_vector<T> hA(size_A, 1, batch_count);
    host_batch_vector<T> hB(size_B, 1, batch_count);
    host_batch_vector<T> hB_gold(size_B, 1, batch_count);
    host_batch_vector<T> hC(size_C, 1, batch_count);
    host_batch_vector<T> hC_1(size_C, 1, batch_count);
    host_batch_vector<T> hC_2(size_C, 1, batch_count);
    host_batch_vector<T> hC_gold(size_C, 1, batch_count);

    CHECK_HIP_ERROR(h_alpha.memcheck());
    CHECK_HIP_ERROR(hA.memcheck());
    CHECK_HIP_ERROR(hB.memcheck());
    CHECK_HIP_ERROR(hB_gold.memcheck());
    CHECK_HIP_ERROR(hC.memcheck());
    CHECK_HIP_ERROR(hC_1.memcheck());
    CHECK_HIP_ERROR(hC_2.memcheck());
    CHECK_HIP_ERROR(hC_gold.memcheck());

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

    //  initialize data on CPU
    h_alpha[0] = alpha;
    rocblas_seedrand();
    if(arg.alpha_isnan<T>())
    {
        rocblas_init_nan<T>(hA);
        rocblas_init_nan<T>(hB);
        rocblas_init_nan<T>(hC);
    }
    else
    {
        rocblas_init<T>(hA);
        rocblas_init<T>(hB);
        rocblas_init<T>(hC);
    }

    hB_gold.copy_from(hB);
    hC_1.copy_from(hC);
    hC_2.copy_from(hC);
    hC_gold.copy_from(hC);

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

    if(arg.unit_check || arg.norm_check)
    {
        // calculate dB <- A^(-1) B   rocblas_device_pointer_host
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));
        CHECK_HIP_ERROR(dC.transfer_from(hC_1));

        CHECK_ROCBLAS_ERROR(rocblas_trmm_outofplace_batched_fn(handle,
                                                               side,
                                                               uplo,
                                                               transA,
                                                               diag,
                                                               M,
                                                               N,
                                                               &h_alpha[0],
                                                               dA.ptr_on_device(),
                                                               lda,
                                                               dB.ptr_on_device(),
                                                               ldb,
                                                               dC.ptr_on_device(),
                                                               ldc,
                                                               batch_count));

        CHECK_HIP_ERROR(hC_1.transfer_from(dC));

        // calculate dB <- A^(-1) B   rocblas_device_pointer_device
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_device));
        CHECK_HIP_ERROR(dC.transfer_from(hC_2));
        CHECK_HIP_ERROR(d_alpha.transfer_from(h_alpha));

        CHECK_ROCBLAS_ERROR(rocblas_trmm_outofplace_batched_fn(handle,
                                                               side,
                                                               uplo,
                                                               transA,
                                                               diag,
                                                               M,
                                                               N,
                                                               d_alpha,
                                                               dA.ptr_on_device(),
                                                               lda,
                                                               dB.ptr_on_device(),
                                                               ldb,
                                                               dC.ptr_on_device(),
                                                               ldc,
                                                               batch_count));

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

        // CPU BLAS
        if(arg.timing)
        {
            cpu_time_used = get_time_us_no_sync();
        }

        for(rocblas_int i = 0; i < batch_count; i++)
        {
            cblas_trmm<T>(side, uplo, transA, diag, M, N, alpha, hA[i], lda, hB_gold[i], ldb);
        }

        if(arg.timing)
        {
            cpu_time_used = get_time_us_no_sync() - cpu_time_used;
        }

        for(int b = 0; b < batch_count; b++)
            for(int i = 0; i < M; i++)
                for(int j = 0; j < N; j++)
                    hC_gold[b][i + j * ldc] = hB_gold[b][i + j * ldb];

        if(arg.unit_check)
        {
            if(std::is_same<T, rocblas_half>{} && K > 10000)
            {
                // For large K, rocblas_half tends to diverge proportional to K
                // Tolerance is slightly greater than 1 / 1024.0
                const double tol = K * sum_error_tolerance<T>;
                near_check_general<T>(M, N, ldc, hC_gold, hC_1, batch_count, tol);
                near_check_general<T>(M, N, ldc, hC_gold, hC_2, batch_count, tol);
            }
            else
            {
                unit_check_general<T>(M, N, ldc, hC_gold, hC_1, batch_count);
                unit_check_general<T>(M, N, ldc, hC_gold, hC_2, batch_count);
            }
        }

        if(arg.norm_check)
        {
            auto err1 = std::abs(norm_check_general<T>('F', M, N, ldc, hC_gold, hC_1, batch_count));
            auto err2 = std::abs(norm_check_general<T>('F', M, N, ldc, hC_gold, hC_2, batch_count));
            rocblas_error = err1 > err2 ? err1 : err2;
        }
    }

    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++)
        {
            CHECK_ROCBLAS_ERROR(rocblas_trmm_outofplace_batched_fn(handle,
                                                                   side,
                                                                   uplo,
                                                                   transA,
                                                                   diag,
                                                                   M,
                                                                   N,
                                                                   &h_alpha[0],
                                                                   dA.ptr_on_device(),
                                                                   lda,
                                                                   dB.ptr_on_device(),
                                                                   ldb,
                                                                   dC.ptr_on_device(),
                                                                   ldc,
                                                                   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_trmm_outofplace_batched_fn(handle,
                                               side,
                                               uplo,
                                               transA,
                                               diag,
                                               M,
                                               N,
                                               &h_alpha[0],
                                               dA.ptr_on_device(),
                                               lda,
                                               dB.ptr_on_device(),
                                               ldb,
                                               dC.ptr_on_device(),
                                               ldc,
                                               batch_count);
        }
        gpu_time_used = get_time_us_sync(stream) - gpu_time_used;

        ArgumentModel<e_side,
                      e_uplo,
                      e_transA,
                      e_diag,
                      e_M,
                      e_N,
                      e_alpha,
                      e_lda,
                      e_ldb,
                      e_ldc,
                      e_batch_count>{}
            .log_args<T>(rocblas_cout,
                         arg,
                         gpu_time_used,
                         trmm_gflop_count<T>(M, N, side),
                         ArgumentLogging::NA_value,
                         cpu_time_used,
                         rocblas_error);
    }
}