/* ************************************************************************
 * Copyright 2016-2021 Advanced Micro Devices, Inc.
 *
 * ************************************************************************ */

#include <fstream>
#include <iostream>
#include <stdlib.h>
#include <vector>

#include "testing_common.hpp"

using namespace std;

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

template <typename T>
hipblasStatus_t testing_herkx(const Arguments& argus)
{
    using U             = real_t<T>;
    bool FORTRAN        = argus.fortran;
    auto hipblasHerkxFn = FORTRAN ? hipblasHerkx<T, U, true> : hipblasHerkx<T, U, false>;

    int N   = argus.N;
    int K   = argus.K;
    int lda = argus.lda;
    int ldb = argus.ldb;
    int ldc = argus.ldc;

    hipblasFillMode_t  uplo   = char2hipblas_fill(argus.uplo_option);
    hipblasOperation_t transA = char2hipblas_operation(argus.transA_option);

    hipblasStatus_t status = HIPBLAS_STATUS_SUCCESS;

    // argument sanity check, quick return if input parameters are invalid before allocating invalid
    // memory
    if(N < 0 || K < 0 || ldc < N || (transA == HIPBLAS_OP_N && (lda < N || ldb < N))
       || (transA != HIPBLAS_OP_N && (lda < K || ldb < K)))
    {
        return HIPBLAS_STATUS_INVALID_VALUE;
    }

    int    K1     = (transA == HIPBLAS_OP_N ? K : N);
    size_t A_size = size_t(lda) * K1;
    size_t B_size = size_t(ldb) * K1;
    size_t C_size = size_t(ldc) * N;

    // Naming: dK is in GPU (device) memory. hK is in CPU (host) memory
    host_vector<T> hA(A_size);
    host_vector<T> hB(B_size);
    host_vector<T> hC_host(C_size);
    host_vector<T> hC_device(C_size);
    host_vector<T> hC_gold(C_size);

    device_vector<T> dA(A_size);
    device_vector<T> dB(B_size);
    device_vector<T> dC(C_size);
    device_vector<T> d_alpha(1);
    device_vector<U> d_beta(1);

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

    double             gpu_time_used, hipblas_error_host, hipblas_error_device;
    hipblasLocalHandle handle(argus);

    // Initial Data on CPU
    srand(1);
    hipblas_init<T>(hA, N, K1, lda);
    hipblas_init<T>(hB, N, K1, ldb);
    hipblas_init<T>(hC_host, N, N, ldc);
    // hB = hA;
    hC_device = hC_host;
    hC_gold   = hC_host;

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

    if(argus.unit_check || argus.norm_check)
    {
        /* =====================================================================
            HIPBLAS
        =================================================================== */
        CHECK_HIPBLAS_ERROR(hipblasSetPointerMode(handle, HIPBLAS_POINTER_MODE_HOST));
        CHECK_HIPBLAS_ERROR(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(hipMemcpy(hC_host, dC, sizeof(T) * C_size, hipMemcpyDeviceToHost));

        CHECK_HIP_ERROR(hipMemcpy(dC, hC_device, sizeof(T) * C_size, hipMemcpyHostToDevice));
        CHECK_HIPBLAS_ERROR(hipblasSetPointerMode(handle, HIPBLAS_POINTER_MODE_DEVICE));
        CHECK_HIPBLAS_ERROR(
            hipblasHerkxFn(handle, uplo, transA, N, K, d_alpha, dA, lda, dB, ldb, d_beta, dC, ldc));

        CHECK_HIP_ERROR(hipMemcpy(hC_device, dC, sizeof(T) * C_size, hipMemcpyDeviceToHost));

        /* =====================================================================
           CPU BLAS
        =================================================================== */
        cblas_herkx<T>(uplo, transA, N, K, h_alpha, hA, lda, hB, ldb, h_beta, hC_gold, 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(argus.unit_check)
        {
            unit_check_general<T>(N, N, ldc, hC_gold, hC_host);
            unit_check_general<T>(N, N, ldc, hC_gold, hC_host);
        }

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

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

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

            CHECK_HIPBLAS_ERROR(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

        ArgumentModel<e_uplo_option,
                      e_transA_option,
                      e_N,
                      e_K,
                      e_alpha,
                      e_lda,
                      e_ldb,
                      e_beta,
                      e_ldc>{}
            .log_args<T>(std::cout,
                         argus,
                         gpu_time_used,
                         herkx_gflop_count<T>(N, K),
                         herkx_gbyte_count<T>(N, K),
                         hipblas_error_host,
                         hipblas_error_device);
    }

    return HIPBLAS_STATUS_SUCCESS;
}