/* ************************************************************************
 * 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_strided_batched_bad_arg(const Arguments& arg)
{
    auto rocblas_trmm_outofplace_strided_batched_fn
        = arg.fortran ? rocblas_trmm_outofplace_strided_batched<T, true>
                      : rocblas_trmm_outofplace_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           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;

    rocblas_local_handle handle{arg};

    rocblas_int          K        = side == rocblas_side_left ? M : N;
    const rocblas_stride stride_a = lda * K;
    const rocblas_stride stride_b = ldb * N;
    const rocblas_stride stride_c = ldc * N;
    size_t               size_A   = batch_count * stride_a;
    size_t               size_B   = batch_count * stride_b;
    size_t               size_C   = batch_count * 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_trmm_outofplace_strided_batched_fn(handle,
                                                                     side,
                                                                     uplo,
                                                                     transA,
                                                                     diag,
                                                                     M,
                                                                     N,
                                                                     &alpha,
                                                                     nullptr,
                                                                     lda,
                                                                     stride_a,
                                                                     dB,
                                                                     ldb,
                                                                     stride_b,
                                                                     dC,
                                                                     ldc,
                                                                     stride_c,
                                                                     batch_count),
                          rocblas_status_invalid_pointer);

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

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

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

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

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

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

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

    // When alpha==0, A and B may be nullptr without error
    EXPECT_ROCBLAS_STATUS(rocblas_trmm_outofplace_strided_batched_fn(handle,
                                                                     side,
                                                                     uplo,
                                                                     transA,
                                                                     diag,
                                                                     M,
                                                                     N,
                                                                     &zero,
                                                                     nullptr,
                                                                     lda,
                                                                     stride_a,
                                                                     dB,
                                                                     ldb,
                                                                     stride_b,
                                                                     dC,
                                                                     ldc,
                                                                     stride_c,
                                                                     batch_count),
                          rocblas_status_success);
}

template <typename T>
void testing_trmm_outofplace_strided_batched(const Arguments& arg)
{
    auto rocblas_trmm_outofplace_strided_batched_fn
        = arg.fortran ? rocblas_trmm_outofplace_strided_batched<T, true>
                      : rocblas_trmm_outofplace_strided_batched<T, false>;

    rocblas_int M           = arg.M;
    rocblas_int N           = arg.N;
    size_t      lda         = size_t(arg.lda);
    size_t      ldb         = size_t(arg.ldb);
    size_t      ldc         = size_t(arg.ldc);
    rocblas_int stride_a    = arg.stride_a;
    rocblas_int stride_b    = arg.stride_b;
    rocblas_int stride_c    = arg.stride_c;
    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;

    if(stride_a < lda * K)
    {
        rocblas_cout << "WARNING: setting stride_a = lda * (side == rocblas_side_left ? M : N)"
                     << std::endl;
        stride_a = lda * (side == rocblas_side_left ? M : N);
    }
    if(stride_b < ldb * N)
    {
        rocblas_cout << "WARNING: setting stride_b = ldb * N" << std::endl;
        stride_b = ldb * N;
    }
    if(stride_c < ldc * N)
    {
        rocblas_cout << "WARNING: setting stride_c = ldc * N" << std::endl;
        stride_c = ldc * N;
    }

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

    rocblas_local_handle handle{arg};

    // 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_strided_batched_fn(handle,
                                                                         side,
                                                                         uplo,
                                                                         transA,
                                                                         diag,
                                                                         M,
                                                                         N,
                                                                         nullptr,
                                                                         nullptr,
                                                                         lda,
                                                                         stride_a,
                                                                         nullptr,
                                                                         ldb,
                                                                         stride_b,
                                                                         nullptr,
                                                                         ldc,
                                                                         stride_c,
                                                                         batch_count),
                              invalid_size ? rocblas_status_invalid_size : rocblas_status_success);
        return;
    }

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

    CHECK_HIP_ERROR(h_alpha.memcheck());
    CHECK_HIP_ERROR(hA.memcheck());
    CHECK_HIP_ERROR(hB.memcheck());
    CHECK_HIP_ERROR(cpuB.memcheck());
    CHECK_HIP_ERROR(hC.memcheck());
    CHECK_HIP_ERROR(hC_1.memcheck());
    CHECK_HIP_ERROR(hC_2.memcheck());
    CHECK_HIP_ERROR(cpuC.memcheck());

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

    // 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);

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

    //  initialize full random matrix hA and hB
    h_alpha[0] = alpha;
    rocblas_seedrand();

    if(arg.alpha_isnan<T>())
    {
        rocblas_init_nan<T>(hA, K, K, lda, stride_a, batch_count);
        rocblas_init_nan<T>(hB, M, N, ldb, stride_b, batch_count);
        rocblas_init_nan<T>(hC, M, N, ldc, stride_c, batch_count);
    }
    else
    {
        rocblas_init<T>(hA);
        rocblas_init<T>(hB);
        rocblas_init<T>(hC);
    }

    cpuB = hB;
    hC_1 = hC; // hXorB <- B
    hC_2 = hC; // hXorB <- B
    cpuC = 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_strided_batched_fn(handle,
                                                                       side,
                                                                       uplo,
                                                                       transA,
                                                                       diag,
                                                                       M,
                                                                       N,
                                                                       &h_alpha[0],
                                                                       dA,
                                                                       lda,
                                                                       stride_a,
                                                                       dB,
                                                                       ldb,
                                                                       stride_b,
                                                                       dC,
                                                                       ldc,
                                                                       stride_c,
                                                                       batch_count));

        CHECK_HIP_ERROR(hC_1.transfer_from(dC));

        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_strided_batched_fn(handle,
                                                                       side,
                                                                       uplo,
                                                                       transA,
                                                                       diag,
                                                                       M,
                                                                       N,
                                                                       d_alpha,
                                                                       dA,
                                                                       lda,
                                                                       stride_a,
                                                                       dB,
                                                                       ldb,
                                                                       stride_b,
                                                                       dC,
                                                                       ldc,
                                                                       stride_c,
                                                                       batch_count));

        CHECK_HIP_ERROR(hC_2.transfer_from(dC));

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

        for(int b = 0; b < batch_count; b++)
        {
            cblas_trmm<T>(side,
                          uplo,
                          transA,
                          diag,
                          M,
                          N,
                          alpha,
                          hA + b * stride_a,
                          lda,
                          cpuB + b * stride_b,
                          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++)
                    cpuC[b * stride_c + i + j * ldc] = cpuB[b * stride_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, stride_c, cpuC, hC_1, batch_count, tol);
                near_check_general<T>(M, N, ldc, stride_c, cpuC, hC_2, batch_count, tol);
            }
            else
            {
                unit_check_general<T>(M, N, ldc, stride_c, cpuC, hC_1, batch_count);
                unit_check_general<T>(M, N, ldc, stride_c, cpuC, hC_2, batch_count);
            }
        }

        if(arg.norm_check)
        {
            auto err1 = std::abs(
                norm_check_general<T>('F', M, N, ldc, stride_c, cpuC, hC_1, batch_count));
            auto err2 = std::abs(
                norm_check_general<T>('F', M, N, ldc, stride_c, cpuC, 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_strided_batched_fn(handle,
                                                                           side,
                                                                           uplo,
                                                                           transA,
                                                                           diag,
                                                                           M,
                                                                           N,
                                                                           &h_alpha[0],
                                                                           dA,
                                                                           lda,
                                                                           stride_a,
                                                                           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_trmm_outofplace_strided_batched_fn(handle,
                                                       side,
                                                       uplo,
                                                       transA,
                                                       diag,
                                                       M,
                                                       N,
                                                       &h_alpha[0],
                                                       dA,
                                                       lda,
                                                       stride_a,
                                                       dB,
                                                       ldb,
                                                       stride_b,
                                                       dC,
                                                       ldc,
                                                       stride_c,
                                                       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_stride_a,
                      e_ldb,
                      e_stride_b,
                      e_ldc,
                      e_stride_c,
                      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);
    }
}