/* ************************************************************************
 * Copyright (C) 2020 Advanced Micro Devices, Inc. All rights Reserved.
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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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
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * ************************************************************************ */

#pragma once
#ifndef TESTING_DENSE2CSX_HPP
#define TESTING_DENSE2CSX_HPP

#include "flops.hpp"
#include "gbyte.hpp"
#include "hipsparse.hpp"
#include "hipsparse_arguments.hpp"
#include "hipsparse_test_unique_ptr.hpp"
#include "unit.hpp"
#include "utility.hpp"

#include <algorithm>
#include <hipsparse.h>
#include <string>

using namespace hipsparse;
using namespace hipsparse_test;

#include <iostream>
template <hipsparseDirection_t DIRA, typename T, typename FUNC>
void testing_dense2csx_bad_arg(FUNC& dense2csx)
{
#if(!defined(CUDART_VERSION))
    static constexpr int M  = 1;
    static constexpr int N  = 1;
    static constexpr int LD = M;

    std::unique_ptr<handle_struct> unique_ptr_handle(new handle_struct);
    hipsparseHandle_t              handle = unique_ptr_handle->handle;

    std::unique_ptr<descr_struct> unique_ptr_descr(new descr_struct);
    hipsparseMatDescr_t           descr = unique_ptr_descr->descr;

    auto m_csx_val         = hipsparse_unique_ptr{device_malloc(sizeof(T) * 1), device_free};
    auto m_dense_val       = hipsparse_unique_ptr{device_malloc(sizeof(T) * 1), device_free};
    auto m_nnzPerRowColumn = hipsparse_unique_ptr{device_malloc(sizeof(int) * 1), device_free};
    auto m_csx_row_col_ptr
        = hipsparse_unique_ptr{device_malloc(sizeof(int) * (1 + 1)), device_free};
    auto m_csx_row_col_ind = hipsparse_unique_ptr{device_malloc(sizeof(int) * 1), device_free};

    T*   d_dense_val       = (T*)m_dense_val.get();
    T*   d_csx_val         = (T*)m_csx_val.get();
    int* d_nnzPerRowColumn = (int*)m_nnzPerRowColumn.get();
    int* d_csx_row_col_ptr = (int*)m_csx_row_col_ptr.get();
    int* d_csx_col_row_ind = (int*)m_csx_row_col_ind.get();

    int local_ptr[2] = {0, 1};
    CHECK_HIP_ERROR(
        hipMemcpy(d_csx_row_col_ptr, local_ptr, sizeof(int) * (1 + 1), hipMemcpyHostToDevice));

    verify_hipsparse_status_invalid_handle(dense2csx(
        nullptr, 0, 0, nullptr, (const T*)nullptr, 0, nullptr, (T*)nullptr, nullptr, nullptr));
    verify_hipsparse_status_invalid_pointer(dense2csx(handle,
                                                      M,
                                                      N,
                                                      nullptr,
                                                      d_dense_val,
                                                      LD,
                                                      d_nnzPerRowColumn,
                                                      d_csx_val,
                                                      d_csx_row_col_ptr,
                                                      d_csx_col_row_ind),
                                            "Error: an invalid pointer must be detected.");
    verify_hipsparse_status_invalid_pointer(dense2csx(handle,
                                                      M,
                                                      N,
                                                      descr,
                                                      nullptr,
                                                      LD,
                                                      d_nnzPerRowColumn,
                                                      d_csx_val,
                                                      d_csx_row_col_ptr,
                                                      d_csx_col_row_ind),
                                            "Error: an invalid pointer must be detected.");
    verify_hipsparse_status_invalid_pointer(dense2csx(handle,
                                                      M,
                                                      N,
                                                      descr,
                                                      d_dense_val,
                                                      LD,
                                                      nullptr,
                                                      d_csx_val,
                                                      d_csx_row_col_ptr,
                                                      d_csx_col_row_ind),
                                            "Error: an invalid pointer must be detected.");
    verify_hipsparse_status_invalid_pointer(dense2csx(handle,
                                                      M,
                                                      N,
                                                      descr,
                                                      d_dense_val,
                                                      LD,
                                                      d_nnzPerRowColumn,
                                                      nullptr,
                                                      d_csx_row_col_ptr,
                                                      d_csx_col_row_ind),
                                            "Error: an invalid pointer must be detected.");
    verify_hipsparse_status_invalid_pointer(dense2csx(handle,
                                                      M,
                                                      N,
                                                      descr,
                                                      d_dense_val,
                                                      LD,
                                                      d_nnzPerRowColumn,
                                                      d_csx_val,
                                                      nullptr,
                                                      d_csx_col_row_ind),
                                            "Error: an invalid pointer must be detected.");
    verify_hipsparse_status_invalid_pointer(dense2csx(handle,
                                                      M,
                                                      N,
                                                      descr,
                                                      d_dense_val,
                                                      LD,
                                                      d_nnzPerRowColumn,
                                                      d_csx_val,
                                                      d_csx_row_col_ptr,
                                                      nullptr),
                                            "Error: an invalid pointer must be detected.");
    verify_hipsparse_status_invalid_size(dense2csx(handle,
                                                   -1,
                                                   N,
                                                   descr,
                                                   d_dense_val,
                                                   LD,
                                                   d_nnzPerRowColumn,
                                                   d_csx_val,
                                                   d_csx_row_col_ptr,
                                                   d_csx_col_row_ind),
                                         "Error: An invalid size must be detected.");
    verify_hipsparse_status_invalid_size(dense2csx(handle,
                                                   M,
                                                   -1,
                                                   descr,
                                                   d_dense_val,
                                                   LD,
                                                   d_nnzPerRowColumn,
                                                   d_csx_val,
                                                   d_csx_row_col_ptr,
                                                   d_csx_col_row_ind),
                                         "Error: An invalid size must be detected.");
    verify_hipsparse_status_invalid_size(dense2csx(handle,
                                                   M,
                                                   N,
                                                   descr,
                                                   d_dense_val,
                                                   M - 1,
                                                   d_nnzPerRowColumn,
                                                   d_csx_val,
                                                   d_csx_row_col_ptr,
                                                   d_csx_col_row_ind),
                                         "Error: An invalid size must be detected.");
#endif
}

template <hipsparseDirection_t DIRA, typename T, typename FUNC>
void testing_dense2csx(const Arguments& argus, FUNC& dense2csx)
{
    int                  M        = argus.M;
    int                  N        = argus.N;
    int                  LD       = argus.lda;
    hipsparseIndexBase_t idx_base = argus.baseA;

    std::unique_ptr<handle_struct> unique_ptr_handle(new handle_struct);
    hipsparseHandle_t              handle = unique_ptr_handle->handle;

    std::unique_ptr<descr_struct> unique_ptr_descr(new descr_struct);
    hipsparseMatDescr_t           descr = unique_ptr_descr->descr;
    CHECK_HIPSPARSE_ERROR(hipsparseSetMatIndexBase(descr, idx_base));

    int              DIMDIR = (HIPSPARSE_DIRECTION_ROW == DIRA) ? M : N;
    std::vector<T>   h_dense_val(LD * N);
    std::vector<int> h_nnzPerRowColumn(DIMDIR);

    // Create the dense matrix.
    auto m_dense_val = hipsparse_unique_ptr{device_malloc(sizeof(T) * LD * N), device_free};
    auto nnzPerRowColumn_managed
        = hipsparse_unique_ptr{device_malloc(sizeof(int) * DIMDIR), device_free};
    auto nnzTotalDevHostPtr_managed
        = hipsparse_unique_ptr{device_malloc(sizeof(int) * 1), device_free};

    T*   d_dense_val       = (T*)m_dense_val.get();
    int* d_nnzPerRowColumn = (int*)nnzPerRowColumn_managed.get();

    // Initialize the entire allocated memory.
    for(int i = 0; i < LD; ++i)
    {
        for(int j = 0; j < N; ++j)
        {
            h_dense_val[j * LD + i] = make_DataType<T>(-1);
        }
    }

    // Initialize a random dense matrix.
    srand(0);
    gen_dense_random_sparsity_pattern(M, N, h_dense_val.data(), LD, HIPSPARSE_ORDER_COL, 0.2);

    // Transfer.
    CHECK_HIP_ERROR(
        hipMemcpy(d_dense_val, h_dense_val.data(), sizeof(T) * LD * N, hipMemcpyHostToDevice));

    int nnz;
    CHECK_HIPSPARSE_ERROR(hipsparseSetPointerMode(handle, HIPSPARSE_POINTER_MODE_HOST));
    CHECK_HIPSPARSE_ERROR(
        hipsparseXnnz(handle, DIRA, M, N, descr, d_dense_val, LD, d_nnzPerRowColumn, &nnz));

    // Transfer.
    CHECK_HIP_ERROR(hipMemcpy(
        h_nnzPerRowColumn.data(), d_nnzPerRowColumn, sizeof(int) * DIMDIR, hipMemcpyDeviceToHost));

    auto m_csx_row_col_ptr
        = hipsparse_unique_ptr{device_malloc(sizeof(int) * (DIMDIR + 1)), device_free};
    auto m_csx_val         = hipsparse_unique_ptr{device_malloc(sizeof(T) * nnz), device_free};
    auto m_csx_col_row_ind = hipsparse_unique_ptr{device_malloc(sizeof(int) * nnz), device_free};

    int* d_csx_row_col_ptr = (int*)m_csx_row_col_ptr.get();
    int* d_csx_col_row_ind = (int*)m_csx_col_row_ind.get();
    T*   d_csx_val         = (T*)m_csx_val.get();

    std::vector<int> cpu_csx_row_col_ptr(DIMDIR + 1);
    std::vector<T>   cpu_csx_val(nnz);
    std::vector<int> cpu_csx_col_row_ind(nnz);

    if(argus.unit_check)
    {
        // Compute the reference host first.
        host_dense2csx<DIRA, T>(M,
                                N,
                                hipsparseGetMatIndexBase(descr),
                                h_dense_val.data(),
                                LD,
                                h_nnzPerRowColumn.data(),
                                cpu_csx_val.data(),
                                cpu_csx_row_col_ptr.data(),
                                cpu_csx_col_row_ind.data());

        CHECK_HIPSPARSE_ERROR(
            dense2csx(handle,
                      M,
                      N,
                      descr,
                      d_dense_val,
                      LD,
                      d_nnzPerRowColumn,
                      d_csx_val,
                      (DIRA == HIPSPARSE_DIRECTION_ROW) ? d_csx_row_col_ptr : d_csx_col_row_ind,
                      (DIRA == HIPSPARSE_DIRECTION_ROW) ? d_csx_col_row_ind : d_csx_row_col_ptr));

        void* buffer = malloc(std::max(sizeof(T), sizeof(int)) * std::max(DIMDIR + 1, nnz));

        // Transfer and check results.
        CHECK_HIP_ERROR(hipMemcpy(buffer, d_csx_val, sizeof(T) * nnz, hipMemcpyDeviceToHost));
        unit_check_general(1, nnz, 1, cpu_csx_val.data(), (T*)buffer);
        CHECK_HIP_ERROR(
            hipMemcpy(buffer, d_csx_col_row_ind, sizeof(int) * nnz, hipMemcpyDeviceToHost));
        unit_check_general(1, nnz, 1, cpu_csx_col_row_ind.data(), (int*)buffer);

        CHECK_HIP_ERROR(hipMemcpy(
            buffer, d_csx_row_col_ptr, sizeof(int) * (DIMDIR + 1), hipMemcpyDeviceToHost));

        unit_check_general(1, (DIMDIR + 1), 1, cpu_csx_row_col_ptr.data(), (int*)buffer);

        free(buffer);
        buffer = nullptr;
    }

    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(dense2csx(
                handle,
                M,
                N,
                descr,
                d_dense_val,
                LD,
                d_nnzPerRowColumn,
                d_csx_val,
                (DIRA == HIPSPARSE_DIRECTION_ROW) ? d_csx_row_col_ptr : d_csx_col_row_ind,
                (DIRA == HIPSPARSE_DIRECTION_ROW) ? d_csx_col_row_ind : d_csx_row_col_ptr));
        }

        double gpu_time_used = get_time_us();

        // Performance run
        for(int iter = 0; iter < number_hot_calls; ++iter)
        {
            CHECK_HIPSPARSE_ERROR(dense2csx(
                handle,
                M,
                N,
                descr,
                d_dense_val,
                LD,
                d_nnzPerRowColumn,
                d_csx_val,
                (DIRA == HIPSPARSE_DIRECTION_ROW) ? d_csx_row_col_ptr : d_csx_col_row_ind,
                (DIRA == HIPSPARSE_DIRECTION_ROW) ? d_csx_col_row_ind : d_csx_row_col_ptr));
        }
        gpu_time_used = (get_time_us() - gpu_time_used) / number_hot_calls;

        double gbyte_count = dense2csx_gbyte_count<DIRA, T>(M, N, nnz);
        double gpu_gbyte   = get_gpu_gbyte(gpu_time_used, gbyte_count);

        std::cout << "GBytes/s: " << gpu_gbyte << " time (ms): " << get_gpu_time_msec(gpu_time_used)
                  << std::endl;
    }
}

#endif // TESTING_DENSE2CSX_HPP