/* ************************************************************************
 * Copyright (C) 2016-2024 Advanced Micro Devices, Inc. All rights reserved.
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 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
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 *
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * SOFTWARE.
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#include <fstream>
#include <iostream>
#include <stdlib.h>
#include <vector>

#include "testing_common.hpp"

/* ============================================================================================ */

using hipblasHerkxModel
    = ArgumentModel<e_a_type, e_uplo, e_transA, e_N, e_K, e_alpha, e_lda, e_ldb, e_beta, e_ldc>;

inline void testname_herkx(const Arguments& arg, std::string& name)
{
    hipblasHerkxModel{}.test_name(arg, name);
}

template <typename T>
void testing_herkx_bad_arg(const Arguments& arg)
{
    using U             = real_t<T>;
    auto hipblasHerkxFn = arg.api == FORTRAN ? hipblasHerkx<T, U, true> : hipblasHerkx<T, U, false>;
    auto hipblasHerkxFn_64
        = arg.api == FORTRAN_64 ? hipblasHerkx_64<T, U, true> : hipblasHerkx_64<T, U, false>;

    hipblasLocalHandle handle(arg);

    int64_t            N      = 101;
    int64_t            K      = 100;
    int64_t            lda    = 102;
    int64_t            ldb    = 103;
    int64_t            ldc    = 104;
    hipblasOperation_t transA = HIPBLAS_OP_N;
    hipblasFillMode_t  uplo   = HIPBLAS_FILL_MODE_LOWER;

    size_t rows = (transA != HIPBLAS_OP_N ? std::max(K, int64_t(1)) : N);
    size_t cols = (transA == HIPBLAS_OP_N ? std::max(K, int64_t(1)) : N);

    // Allocate device memory
    device_matrix<T> dA(rows, cols, lda);
    device_matrix<T> dB(rows, cols, ldb);
    device_matrix<T> dC(N, N, ldc);

    device_vector<T> d_alpha(1), d_zero(1);
    device_vector<U> d_beta(1), d_one(1);
    const T          h_alpha(1), h_zero(0);
    const U          h_beta(2), h_one(1);

    const T* alpha = &h_alpha;
    const U* beta  = &h_beta;
    const U* one   = &h_one;
    const T* zero  = &h_zero;

    for(auto pointer_mode : {HIPBLAS_POINTER_MODE_HOST, HIPBLAS_POINTER_MODE_DEVICE})
    {
        CHECK_HIPBLAS_ERROR(hipblasSetPointerMode(handle, pointer_mode));

        if(pointer_mode == HIPBLAS_POINTER_MODE_DEVICE)
        {
            CHECK_HIP_ERROR(hipMemcpy(d_alpha, alpha, sizeof(*alpha), hipMemcpyHostToDevice));
            CHECK_HIP_ERROR(hipMemcpy(d_beta, beta, sizeof(*beta), hipMemcpyHostToDevice));
            CHECK_HIP_ERROR(hipMemcpy(d_one, one, sizeof(*one), hipMemcpyHostToDevice));
            CHECK_HIP_ERROR(hipMemcpy(d_zero, zero, sizeof(*zero), hipMemcpyHostToDevice));
            alpha = d_alpha;
            beta  = d_beta;
            one   = d_one;
            zero  = d_zero;
        }

        DAPI_EXPECT(HIPBLAS_STATUS_NOT_INITIALIZED,
                    hipblasHerkxFn,
                    (nullptr, uplo, transA, N, K, alpha, dA, lda, dB, ldb, beta, dC, ldc));

        DAPI_EXPECT(
            HIPBLAS_STATUS_INVALID_VALUE,
            hipblasHerkxFn,
            (handle, HIPBLAS_FILL_MODE_FULL, transA, N, K, alpha, dA, lda, dB, ldb, beta, dC, ldc));
        DAPI_EXPECT(HIPBLAS_STATUS_INVALID_ENUM,
                    hipblasHerkxFn,
                    (handle,
                     (hipblasFillMode_t)HIPBLAS_OP_N,
                     transA,
                     N,
                     K,
                     alpha,
                     dA,
                     lda,
                     dB,
                     ldb,
                     beta,
                     dC,
                     ldc));

        DAPI_EXPECT(HIPBLAS_STATUS_INVALID_ENUM,
                    hipblasHerkxFn,
                    (handle,
                     uplo,
                     (hipblasOperation_t)HIPBLAS_FILL_MODE_FULL,
                     N,
                     K,
                     alpha,
                     dA,
                     lda,
                     dB,
                     ldb,
                     beta,
                     dC,
                     ldc));

        if(arg.bad_arg_all)
        {
            DAPI_EXPECT(HIPBLAS_STATUS_INVALID_VALUE,
                        hipblasHerkxFn,
                        (handle, uplo, transA, N, K, nullptr, dA, lda, dB, ldb, beta, dC, ldc));
            DAPI_EXPECT(HIPBLAS_STATUS_INVALID_VALUE,
                        hipblasHerkxFn,
                        (handle, uplo, transA, N, K, alpha, dA, lda, dB, ldb, nullptr, dC, ldc));

            DAPI_EXPECT(HIPBLAS_STATUS_INVALID_VALUE,
                        hipblasHerkxFn,
                        (handle, uplo, HIPBLAS_OP_T, N, K, alpha, dA, lda, dB, ldb, beta, dC, ldc));

            if(pointer_mode == HIPBLAS_POINTER_MODE_HOST)
            {
                DAPI_EXPECT(
                    HIPBLAS_STATUS_INVALID_VALUE,
                    hipblasHerkxFn,
                    (handle, uplo, transA, N, K, alpha, nullptr, lda, dB, ldb, beta, dC, ldc));
                DAPI_EXPECT(
                    HIPBLAS_STATUS_INVALID_VALUE,
                    hipblasHerkxFn,
                    (handle, uplo, transA, N, K, alpha, dA, lda, nullptr, ldb, beta, dC, ldc));
                DAPI_EXPECT(
                    HIPBLAS_STATUS_INVALID_VALUE,
                    hipblasHerkxFn,
                    (handle, uplo, transA, N, K, alpha, dA, lda, dB, ldb, beta, nullptr, ldc));
            }

            // If k == 0 && beta == 1, A, B, C may be nullptr
            DAPI_CHECK(
                hipblasHerkxFn,
                (handle, uplo, transA, N, 0, alpha, nullptr, lda, nullptr, ldb, one, nullptr, ldc));

            // If alpha == 0 && beta == 1, A, B, C may be nullptr
            DAPI_CHECK(
                hipblasHerkxFn,
                (handle, uplo, transA, N, K, zero, nullptr, lda, nullptr, ldb, one, nullptr, ldc));

            // herkx will quick-return with alpha == 0 && beta == 1. Here, c_i32_overflow will rollover in the case of 32-bit params,
            // and quick-return with 64-bit params. This depends on implementation so only testing rocBLAS backend
            DAPI_EXPECT((arg.api & c_API_64) ? HIPBLAS_STATUS_SUCCESS
                                             : HIPBLAS_STATUS_INVALID_VALUE,
                        hipblasHerkxFn,
                        (handle,
                         uplo,
                         transA,
                         c_i32_overflow,
                         c_i32_overflow,
                         zero,
                         nullptr,
                         c_i32_overflow,
                         nullptr,
                         c_i32_overflow,
                         one,
                         nullptr,
                         c_i32_overflow));
        }

        // If N == 0, can have nullptrs
        DAPI_CHECK(hipblasHerkxFn,
                   (handle,
                    uplo,
                    transA,
                    0,
                    K,
                    nullptr,
                    nullptr,
                    lda,
                    nullptr,
                    ldb,
                    nullptr,
                    nullptr,
                    ldc));
    }
}

template <typename T>
void testing_herkx(const Arguments& arg)
{
    using U             = real_t<T>;
    auto hipblasHerkxFn = arg.api == FORTRAN ? hipblasHerkx<T, U, true> : hipblasHerkx<T, U, false>;
    auto hipblasHerkxFn_64
        = arg.api == FORTRAN_64 ? hipblasHerkx_64<T, U, true> : hipblasHerkx_64<T, U, false>;

    int64_t N   = arg.N;
    int64_t K   = arg.K;
    int64_t lda = arg.lda;
    int64_t ldb = arg.ldb;
    int64_t ldc = arg.ldc;

    hipblasFillMode_t  uplo   = char2hipblas_fill(arg.uplo);
    hipblasOperation_t transA = char2hipblas_operation(arg.transA);

    hipblasStatus_t status = HIPBLAS_STATUS_SUCCESS;

    hipblasLocalHandle handle(arg);

    // argument sanity check, quick return if input parameters are invalid before allocating invalid
    // memory
    bool invalid_size
        = (N < 0 || K < 0 || ldc < N || (transA == HIPBLAS_OP_N && (lda < N || ldb < N))
           || (transA != HIPBLAS_OP_N && (lda < K || ldb < K)));
    if(invalid_size || !N)
    {
        DAPI_EXPECT(invalid_size ? HIPBLAS_STATUS_INVALID_VALUE : HIPBLAS_STATUS_SUCCESS,
                    hipblasHerkxFn,
                    (handle,
                     uplo,
                     transA,
                     N,
                     K,
                     nullptr,
                     nullptr,
                     lda,
                     nullptr,
                     ldb,
                     nullptr,
                     nullptr,
                     ldc));
        return;
    }

    size_t rows = (transA != HIPBLAS_OP_N ? std::max(K, int64_t(1)) : N);
    size_t cols = (transA == HIPBLAS_OP_N ? std::max(K, int64_t(1)) : N);

    // Naming: `h` is in CPU (host) memory(eg hA), `d` is in GPU (device) memory (eg dA).
    // Allocate host memory
    host_matrix<T> hA(rows, cols, lda);
    host_matrix<T> hB(rows, cols, ldb);
    host_matrix<T> hC_host(N, N, ldc);
    host_matrix<T> hC_device(N, N, ldc);
    host_matrix<T> hC_cpu(N, N, ldc);

    // Allocate device memory
    device_matrix<T> dA(rows, cols, lda);
    device_matrix<T> dB(rows, cols, ldb);
    device_matrix<T> dC(N, N, ldc);
    device_vector<T> d_alpha(1);
    device_vector<U> d_beta(1);

    // Check device memory allocation
    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());

    T h_alpha = arg.get_alpha<T>();
    U h_beta  = arg.get_beta<U>();

    double gpu_time_used, hipblas_error_host, hipblas_error_device;

    // Initial Data on CPU
    hipblas_init_matrix(hA, arg, hipblas_client_alpha_sets_nan, hipblas_general_matrix, true);
    hipblas_init_matrix(hB, arg, hipblas_client_never_set_nan, hipblas_general_matrix, false, true);
    hipblas_init_matrix(hC_host, arg, hipblas_client_never_set_nan, hipblas_hermitian_matrix);

    // copy matrix is easy in STL; hB = hA: save a copy in hB which will be output of CPU BLAS
    hC_device = hC_host;
    hC_cpu    = hC_host;

    // copy data from CPU to device
    CHECK_HIP_ERROR(dA.transfer_from(hA));
    CHECK_HIP_ERROR(dB.transfer_from(hB));
    CHECK_HIP_ERROR(dC.transfer_from(hC_host));
    CHECK_HIP_ERROR(hipMemcpy(d_alpha, &h_alpha, sizeof(T), hipMemcpyHostToDevice));
    CHECK_HIP_ERROR(hipMemcpy(d_beta, &h_beta, sizeof(U), hipMemcpyHostToDevice));

    if(arg.unit_check || arg.norm_check)
    {
        /* =====================================================================
            HIPBLAS
        =================================================================== */
        CHECK_HIPBLAS_ERROR(hipblasSetPointerMode(handle, HIPBLAS_POINTER_MODE_HOST));
        DAPI_CHECK(hipblasHerkxFn,
                   (handle, uplo, transA, N, K, &h_alpha, dA, lda, dB, ldb, &h_beta, dC, ldc));

        // copy output from device to CPU
        CHECK_HIP_ERROR(hC_host.transfer_from(dC));

        CHECK_HIP_ERROR(dC.transfer_from(hC_device));
        CHECK_HIPBLAS_ERROR(hipblasSetPointerMode(handle, HIPBLAS_POINTER_MODE_DEVICE));
        DAPI_CHECK(hipblasHerkxFn,
                   (handle, uplo, transA, N, K, d_alpha, dA, lda, dB, ldb, d_beta, dC, ldc));

        CHECK_HIP_ERROR(hC_device.transfer_from(dC));

        /* =====================================================================
           CPU BLAS
        =================================================================== */
        ref_herkx<T>(uplo, transA, N, K, h_alpha, hA, lda, hB, ldb, h_beta, hC_cpu, ldc);

        // enable unit check, notice unit check is not invasive, but norm check is,
        // unit check and norm check can not be interchanged their order
        if(arg.unit_check)
        {
            unit_check_general<T>(N, N, ldc, hC_cpu, hC_host);
            unit_check_general<T>(N, N, ldc, hC_cpu, hC_host);
        }

        if(arg.norm_check)
        {
            hipblas_error_host   = norm_check_general<T>('F', N, N, ldc, hC_cpu, hC_host);
            hipblas_error_device = norm_check_general<T>('F', N, N, ldc, hC_cpu, hC_device);
        }
    }

    if(arg.timing)
    {
        hipStream_t stream;
        CHECK_HIPBLAS_ERROR(hipblasGetStream(handle, &stream));
        CHECK_HIPBLAS_ERROR(hipblasSetPointerMode(handle, HIPBLAS_POINTER_MODE_DEVICE));

        int runs = arg.cold_iters + arg.iters;
        for(int iter = 0; iter < runs; iter++)
        {
            if(iter == arg.cold_iters)
                gpu_time_used = get_time_us_sync(stream);

            DAPI_DISPATCH(hipblasHerkxFn,
                          (handle, uplo, transA, N, K, d_alpha, dA, lda, dB, ldb, d_beta, dC, ldc));
        }
        gpu_time_used = get_time_us_sync(stream) - gpu_time_used; // in microseconds

        hipblasHerkxModel{}.log_args<T>(std::cout,
                                        arg,
                                        gpu_time_used,
                                        herkx_gflop_count<T>(N, K),
                                        herkx_gbyte_count<T>(N, K),
                                        hipblas_error_host,
                                        hipblas_error_device);
    }
}
