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#pragma once
#ifndef TESTING_GATHER_HPP
#define TESTING_GATHER_HPP

#include "display.hpp"
#include "flops.hpp"
#include "gbyte.hpp"
#include "hipsparse_arguments.hpp"
#include "hipsparse_graph.hpp"
#include "hipsparse_test_unique_ptr.hpp"
#include "unit.hpp"
#include "utility.hpp"

#include <hipsparse.h>
#include <typeinfo>

using namespace hipsparse_test;

template <typename I, typename T>
void testing_gather_bad_arg(const Arguments& argus)
{
#if(!defined(CUDART_VERSION) || CUDART_VERSION >= 11000)
    int64_t size = 100;
    int64_t nnz  = 100;

    hipsparseIndexType_t idxType  = HIPSPARSE_INDEX_32I;
    hipsparseIndexBase_t idxBase  = HIPSPARSE_INDEX_BASE_ZERO;
    hipDataType          dataType = HIP_R_32F;

    hipsparseLocalHandle_t handle;

    auto dx_val_managed = hipsparse_unique_ptr{device_malloc(sizeof(float) * nnz), device_free};
    auto dx_ind_managed = hipsparse_unique_ptr{device_malloc(sizeof(int) * nnz), device_free};
    auto dy_managed     = hipsparse_unique_ptr{device_malloc(sizeof(float) * size), device_free};

    float* dx_val = (float*)dx_val_managed.get();
    int*   dx_ind = (int*)dx_ind_managed.get();
    float* dy     = (float*)dy_managed.get();

    // Structures
    hipsparseSpVecDescr_t x;
    hipsparseDnVecDescr_t y;

    verify_hipsparse_status_success(
        hipsparseCreateSpVec(&x, size, nnz, dx_ind, dx_val, idxType, idxBase, dataType), "Success");
    verify_hipsparse_status_success(hipsparseCreateDnVec(&y, size, dy, dataType), "Success");

    // Gather
    verify_hipsparse_status_invalid_handle(hipsparseGather(nullptr, y, x));
    verify_hipsparse_status_invalid_pointer(hipsparseGather(handle, nullptr, x),
                                            "Error: y is nullptr");
    verify_hipsparse_status_invalid_pointer(hipsparseGather(handle, y, nullptr),
                                            "Error: x is nullptr");

    // Destruct
    verify_hipsparse_status_success(hipsparseDestroySpVec(x), "Success");
    verify_hipsparse_status_success(hipsparseDestroyDnVec(y), "Success");
#endif
}

template <typename I, typename T>
void testing_gather(Arguments argus)
{
#if(!defined(CUDART_VERSION) || CUDART_VERSION >= 11000)
    I                    size    = argus.N;
    I                    nnz     = argus.nnz;
    hipsparseIndexBase_t idxBase = argus.baseA;

    // Index and data type
    hipsparseIndexType_t idxType  = getIndexType<I>();
    hipDataType          dataType = getDataType<T>();

    // hipSPARSE handle
    hipsparseLocalHandle_t handle(argus);

    // Host structures
    std::vector<I> hx_ind(nnz);
    std::vector<T> hx_val(nnz);
    std::vector<T> hx_val_gold(nnz);
    std::vector<T> hy(size);

    // Initial Data on CPU
    srand(12345ULL);
    hipsparseInitIndex(hx_ind.data(), nnz, idxBase, size + idxBase);
    hipsparseInit<T>(hy, 1, size);

    // Allocate memory on device
    auto dx_ind_managed = hipsparse_unique_ptr{device_malloc(sizeof(I) * nnz), device_free};
    auto dx_val_managed = hipsparse_unique_ptr{device_malloc(sizeof(T) * nnz), device_free};
    auto dy_managed     = hipsparse_unique_ptr{device_malloc(sizeof(T) * size), device_free};

    I* dx_ind = (I*)dx_ind_managed.get();
    T* dx_val = (T*)dx_val_managed.get();
    T* dy     = (T*)dy_managed.get();

    // copy data from CPU to device
    CHECK_HIP_ERROR(hipMemcpy(dx_ind, hx_ind.data(), sizeof(I) * nnz, hipMemcpyHostToDevice));
    CHECK_HIP_ERROR(hipMemcpy(dy, hy.data(), sizeof(T) * size, hipMemcpyHostToDevice));

    // Create structures
    hipsparseSpVecDescr_t x;
    hipsparseDnVecDescr_t y;

    CHECK_HIPSPARSE_ERROR(
        hipsparseCreateSpVec(&x, size, nnz, dx_ind, dx_val, idxType, idxBase, dataType));
    CHECK_HIPSPARSE_ERROR(hipsparseCreateDnVec(&y, size, dy, dataType));

    if(argus.unit_check)
    {
        // Gather
        CHECK_HIPSPARSE_ERROR(testing::hipsparseGather(handle, y, x));

        // Copy output from device to CPU
        CHECK_HIP_ERROR(hipMemcpy(hx_val.data(), dx_val, sizeof(T) * nnz, hipMemcpyDeviceToHost));

        // CPU
        host_gthr(nnz, hy.data(), hx_val_gold.data(), hx_ind.data(), idxBase);

        // Verify results against host
        unit_check_general(1, nnz, 1, hx_val_gold.data(), hx_val.data());
    }

    if(argus.timing)
    {
        int number_cold_calls = 2;
        int number_hot_calls  = argus.iters;

        // Warm up
        for(int iter = 0; iter < number_cold_calls; ++iter)
        {
            CHECK_HIPSPARSE_ERROR(testing::hipsparseGather(handle, y, x));
        }

        double gpu_time_used = get_time_us();

        // Performance run
        for(int iter = 0; iter < number_hot_calls; ++iter)
        {
            CHECK_HIPSPARSE_ERROR(testing::hipsparseGather(handle, y, x));
        }

        gpu_time_used = (get_time_us() - gpu_time_used) / number_hot_calls;

        double gbyte_count = gthr_gbyte_count<T>(nnz);
        double gpu_gbyte   = get_gpu_gbyte(gpu_time_used, gbyte_count);

        display_timing_info(display_key_t::nnz,
                            nnz,
                            display_key_t::bandwidth,
                            gpu_gbyte,
                            display_key_t::time_ms,
                            get_gpu_time_msec(gpu_time_used));
    }

    CHECK_HIPSPARSE_ERROR(hipsparseDestroySpVec(x));
    CHECK_HIPSPARSE_ERROR(hipsparseDestroyDnVec(y));
#endif
}

#endif // TESTING_GATHER_HPP