/* ************************************************************************
 * Copyright (C) 2020-2025 Advanced Micro Devices, Inc. All rights Reserved.
 *
 * 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
 * copies of the Software, and to permit persons to whom the Software is
 * 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_GEBSR2CSR_HPP
#define TESTING_GEBSR2CSR_HPP

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

#include <algorithm>
#include <hipsparse.h>
#include <iostream>
#include <string>
using namespace hipsparse;
using namespace hipsparse_test;

template <typename T>
void testing_gebsr2csr_bad_arg(const Arguments& argus)
{
#if(!defined(CUDART_VERSION))
    int                  m             = 1;
    int                  n             = 1;
    int                  safe_size     = 1;
    int                  row_block_dim = 2;
    int                  col_block_dim = 2;
    hipsparseIndexBase_t csr_idx_base  = HIPSPARSE_INDEX_BASE_ZERO;
    hipsparseIndexBase_t bsr_idx_base  = HIPSPARSE_INDEX_BASE_ZERO;
    hipsparseDirection_t dir           = HIPSPARSE_DIRECTION_ROW;

    hipsparseLocalHandle_t        handle;
    std::unique_ptr<descr_struct> unique_ptr_csr_descr(new descr_struct);
    hipsparseMatDescr_t           csr_descr = unique_ptr_csr_descr->descr;
    std::unique_ptr<descr_struct> unique_ptr_bsr_descr(new descr_struct);
    hipsparseMatDescr_t           bsr_descr = unique_ptr_bsr_descr->descr;

    hipsparseSetMatIndexBase(csr_descr, csr_idx_base);
    hipsparseSetMatIndexBase(bsr_descr, bsr_idx_base);

    auto bsr_row_ptr_managed
        = hipsparse_unique_ptr{device_malloc(sizeof(int) * (safe_size + 1)), device_free};
    auto bsr_col_ind_managed
        = hipsparse_unique_ptr{device_malloc(sizeof(int) * safe_size), device_free};

    auto bsr_val_managed = hipsparse_unique_ptr{device_malloc(sizeof(T) * safe_size), device_free};
    auto csr_row_ptr_managed
        = hipsparse_unique_ptr{device_malloc(sizeof(int) * (safe_size + 1)), device_free};
    auto csr_col_ind_managed
        = hipsparse_unique_ptr{device_malloc(sizeof(int) * safe_size), device_free};
    auto csr_val_managed = hipsparse_unique_ptr{device_malloc(sizeof(T) * safe_size), device_free};

    int* bsr_row_ptr = (int*)bsr_row_ptr_managed.get();
    int* bsr_col_ind = (int*)bsr_col_ind_managed.get();
    T*   bsr_val     = (T*)bsr_val_managed.get();
    int* csr_row_ptr = (int*)csr_row_ptr_managed.get();
    int* csr_col_ind = (int*)csr_col_ind_managed.get();
    T*   csr_val     = (T*)csr_val_managed.get();

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

    verify_hipsparse_status_invalid_handle(hipsparseXgebsr2csr(nullptr,
                                                               dir,
                                                               m,
                                                               n,
                                                               bsr_descr,
                                                               bsr_val,
                                                               bsr_row_ptr,
                                                               bsr_col_ind,
                                                               row_block_dim,
                                                               col_block_dim,
                                                               csr_descr,
                                                               csr_val,
                                                               csr_row_ptr,
                                                               csr_col_ind));
    verify_hipsparse_status_invalid_pointer(hipsparseXgebsr2csr(handle,
                                                                dir,
                                                                m,
                                                                n,
                                                                nullptr,
                                                                bsr_val,
                                                                bsr_row_ptr,
                                                                bsr_col_ind,
                                                                row_block_dim,
                                                                col_block_dim,
                                                                csr_descr,
                                                                csr_val,
                                                                csr_row_ptr,
                                                                csr_col_ind),
                                            "Error: bsr_descr is nullptr");
    verify_hipsparse_status_invalid_pointer(hipsparseXgebsr2csr(handle,
                                                                dir,
                                                                m,
                                                                n,
                                                                bsr_descr,
                                                                (T*)nullptr,
                                                                bsr_row_ptr,
                                                                bsr_col_ind,
                                                                row_block_dim,
                                                                col_block_dim,
                                                                csr_descr,
                                                                csr_val,
                                                                csr_row_ptr,
                                                                csr_col_ind),
                                            "Error: bsr_val is nullptr");
    verify_hipsparse_status_invalid_pointer(hipsparseXgebsr2csr(handle,
                                                                dir,
                                                                m,
                                                                n,
                                                                bsr_descr,
                                                                bsr_val,
                                                                nullptr,
                                                                bsr_col_ind,
                                                                row_block_dim,
                                                                col_block_dim,
                                                                csr_descr,
                                                                csr_val,
                                                                csr_row_ptr,
                                                                csr_col_ind),
                                            "Error: bsr_row_ptr is nullptr");
    verify_hipsparse_status_invalid_pointer(hipsparseXgebsr2csr(handle,
                                                                dir,
                                                                m,
                                                                n,
                                                                bsr_descr,
                                                                bsr_val,
                                                                bsr_row_ptr,
                                                                nullptr,
                                                                row_block_dim,
                                                                col_block_dim,
                                                                csr_descr,
                                                                csr_val,
                                                                csr_row_ptr,
                                                                csr_col_ind),
                                            "Error: bsr_col_ind is nullptr");
    verify_hipsparse_status_invalid_pointer(hipsparseXgebsr2csr(handle,
                                                                dir,
                                                                m,
                                                                n,
                                                                bsr_descr,
                                                                bsr_val,
                                                                bsr_row_ptr,
                                                                bsr_col_ind,
                                                                row_block_dim,
                                                                col_block_dim,
                                                                nullptr,
                                                                csr_val,
                                                                csr_row_ptr,
                                                                csr_col_ind),
                                            "Error: csr_descr is nullptr");
    verify_hipsparse_status_invalid_pointer(hipsparseXgebsr2csr(handle,
                                                                dir,
                                                                m,
                                                                n,
                                                                bsr_descr,
                                                                bsr_val,
                                                                bsr_row_ptr,
                                                                bsr_col_ind,
                                                                row_block_dim,
                                                                col_block_dim,
                                                                csr_descr,
                                                                (T*)nullptr,
                                                                csr_row_ptr,
                                                                csr_col_ind),
                                            "Error: csr_val is nullptr");
    verify_hipsparse_status_invalid_pointer(hipsparseXgebsr2csr(handle,
                                                                dir,
                                                                m,
                                                                n,
                                                                bsr_descr,
                                                                bsr_val,
                                                                bsr_row_ptr,
                                                                bsr_col_ind,
                                                                row_block_dim,
                                                                col_block_dim,
                                                                csr_descr,
                                                                csr_val,
                                                                nullptr,
                                                                csr_col_ind),
                                            "Error: csr_row_ptr is nullptr");
    verify_hipsparse_status_invalid_pointer(hipsparseXgebsr2csr(handle,
                                                                dir,
                                                                m,
                                                                n,
                                                                bsr_descr,
                                                                bsr_val,
                                                                bsr_row_ptr,
                                                                bsr_col_ind,
                                                                row_block_dim,
                                                                col_block_dim,
                                                                csr_descr,
                                                                csr_val,
                                                                csr_row_ptr,
                                                                nullptr),
                                            "Error: csr_col_ind is nullptr");
    verify_hipsparse_status_invalid_size(hipsparseXgebsr2csr(handle,
                                                             dir,
                                                             -1,
                                                             n,
                                                             bsr_descr,
                                                             bsr_val,
                                                             bsr_row_ptr,
                                                             bsr_col_ind,
                                                             row_block_dim,
                                                             col_block_dim,
                                                             csr_descr,
                                                             csr_val,
                                                             csr_row_ptr,
                                                             csr_col_ind),
                                         "Error: m is invalid");
    verify_hipsparse_status_invalid_size(hipsparseXgebsr2csr(handle,
                                                             dir,
                                                             m,
                                                             -1,
                                                             bsr_descr,
                                                             bsr_val,
                                                             bsr_row_ptr,
                                                             bsr_col_ind,
                                                             row_block_dim,
                                                             col_block_dim,
                                                             csr_descr,
                                                             csr_val,
                                                             csr_row_ptr,
                                                             csr_col_ind),
                                         "Error: n is invalid");
    verify_hipsparse_status_invalid_size(hipsparseXgebsr2csr(handle,
                                                             dir,
                                                             m,
                                                             n,
                                                             bsr_descr,
                                                             bsr_val,
                                                             bsr_row_ptr,
                                                             bsr_col_ind,
                                                             -1,
                                                             col_block_dim,
                                                             csr_descr,
                                                             csr_val,
                                                             csr_row_ptr,
                                                             csr_col_ind),
                                         "Error: row_block_dim is invalid");
    verify_hipsparse_status_invalid_size(hipsparseXgebsr2csr(handle,
                                                             dir,
                                                             m,
                                                             n,
                                                             bsr_descr,
                                                             bsr_val,
                                                             bsr_row_ptr,
                                                             bsr_col_ind,
                                                             row_block_dim,
                                                             -1,
                                                             csr_descr,
                                                             csr_val,
                                                             csr_row_ptr,
                                                             csr_col_ind),
                                         "Error: col_block_dim is invalid");
#endif
}

template <typename T>
void testing_gebsr2csr(Arguments argus)
{
    int                  m             = argus.M;
    int                  n             = argus.N;
    int                  row_block_dim = argus.row_block_dimA;
    int                  col_block_dim = argus.col_block_dimA;
    hipsparseIndexBase_t csr_idx_base  = argus.baseA;
    hipsparseIndexBase_t bsr_idx_base  = argus.baseB;
    hipsparseDirection_t dir           = argus.dirA;
    std::string          filename      = argus.filename;

    hipsparseLocalHandle_t        handle(argus);
    std::unique_ptr<descr_struct> unique_ptr_csr_descr(new descr_struct);
    hipsparseMatDescr_t           csr_descr = unique_ptr_csr_descr->descr;
    std::unique_ptr<descr_struct> unique_ptr_bsr_descr(new descr_struct);
    hipsparseMatDescr_t           bsr_descr = unique_ptr_bsr_descr->descr;

    hipsparseSetMatIndexBase(csr_descr, csr_idx_base);
    hipsparseSetMatIndexBase(bsr_descr, bsr_idx_base);

    int mb = m * row_block_dim;
    int nb = n * col_block_dim;

    srand(12345ULL);

    // Host structures
    std::vector<int> bsr_row_ptr;
    std::vector<int> bsr_col_ind;
    std::vector<T>   bsr_val;

    // Read or construct CSR matrix
    int nnzb = 0;
    CHECK_GENERATE_MATRIX_ERROR(generate_csr_matrix(
        filename, mb, nb, nnzb, bsr_row_ptr, bsr_col_ind, bsr_val, bsr_idx_base));

    m          = mb * row_block_dim;
    n          = nb * col_block_dim;
    size_t nnz = nnzb * row_block_dim * col_block_dim;

    // Now use the csr matrix as the symbolic for the gebsr matrix.
    bsr_val.resize(nnz);
    int idx = 0;
    switch(dir)
    {
    case HIPSPARSE_DIRECTION_COLUMN:
    {
        for(int i = 0; i < mb; ++i)
        {
            for(int r = 0; r < row_block_dim; ++r)
            {
                for(int k = bsr_row_ptr[i] - bsr_idx_base; k < bsr_row_ptr[i + 1] - bsr_idx_base;
                    ++k)
                {
                    for(int c = 0; c < col_block_dim; ++c)
                    {
                        bsr_val[k * row_block_dim * col_block_dim + c * row_block_dim + r]
                            = make_DataType<T>(++idx);
                    }
                }
            }
        }
        break;
    }

    case HIPSPARSE_DIRECTION_ROW:
    {
        for(int i = 0; i < mb; ++i)
        {
            for(int r = 0; r < row_block_dim; ++r)
            {
                for(int k = bsr_row_ptr[i] - bsr_idx_base; k < bsr_row_ptr[i + 1] - bsr_idx_base;
                    ++k)
                {
                    for(int c = 0; c < col_block_dim; ++c)
                    {
                        bsr_val[k * row_block_dim * col_block_dim + r * col_block_dim + c]
                            = make_DataType<T>(++idx);
                    }
                }
            }
        }
        break;
    }
    }

    // Allocate memory on the device
    auto dbsr_row_ptr_managed
        = hipsparse_unique_ptr{device_malloc(sizeof(int) * (mb + 1)), device_free};
    auto dbsr_col_ind_managed
        = hipsparse_unique_ptr{device_malloc(sizeof(int) * nnzb), device_free};
    auto dbsr_val_managed = hipsparse_unique_ptr{device_malloc(sizeof(T) * nnz), device_free};

    auto dcsr_row_ptr_managed
        = hipsparse_unique_ptr{device_malloc(sizeof(int) * (m + 1)), device_free};
    auto dcsr_col_ind_managed = hipsparse_unique_ptr{device_malloc(sizeof(int) * nnz), device_free};
    auto dcsr_val_managed     = hipsparse_unique_ptr{device_malloc(sizeof(T) * nnz), device_free};

    int* dbsr_row_ptr = (int*)dbsr_row_ptr_managed.get();
    int* dbsr_col_ind = (int*)dbsr_col_ind_managed.get();
    T*   dbsr_val     = (T*)dbsr_val_managed.get();
    int* dcsr_row_ptr = (int*)dcsr_row_ptr_managed.get();
    int* dcsr_col_ind = (int*)dcsr_col_ind_managed.get();
    T*   dcsr_val     = (T*)dcsr_val_managed.get();

    // Copy data from host to device
    CHECK_HIP_ERROR(
        hipMemcpy(dbsr_row_ptr, bsr_row_ptr.data(), sizeof(int) * (mb + 1), hipMemcpyHostToDevice));
    CHECK_HIP_ERROR(
        hipMemcpy(dbsr_col_ind, bsr_col_ind.data(), sizeof(int) * nnzb, hipMemcpyHostToDevice));
    CHECK_HIP_ERROR(hipMemcpy(dbsr_val, bsr_val.data(), sizeof(T) * nnz, hipMemcpyHostToDevice));

    if(argus.unit_check)
    {
        CHECK_HIPSPARSE_ERROR(hipsparseXgebsr2csr(handle,
                                                  dir,
                                                  mb,
                                                  nb,
                                                  bsr_descr,
                                                  dbsr_val,
                                                  dbsr_row_ptr,
                                                  dbsr_col_ind,
                                                  row_block_dim,
                                                  col_block_dim,
                                                  csr_descr,
                                                  dcsr_val,
                                                  dcsr_row_ptr,
                                                  dcsr_col_ind));

        // Host CSR matrix
        std::vector<int> dh_csr_row_ptr(m + 1);
        std::vector<int> dh_csr_col_ind(nnz);
        std::vector<T>   dh_csr_val(nnz);

        // Copy output from device to host
        CHECK_HIP_ERROR(hipMemcpy(
            dh_csr_row_ptr.data(), dcsr_row_ptr, sizeof(int) * (m + 1), hipMemcpyDeviceToHost));
        CHECK_HIP_ERROR(hipMemcpy(
            dh_csr_col_ind.data(), dcsr_col_ind, sizeof(int) * nnz, hipMemcpyDeviceToHost));
        CHECK_HIP_ERROR(
            hipMemcpy(dh_csr_val.data(), dcsr_val, sizeof(T) * nnz, hipMemcpyDeviceToHost));

        // Host CSR matrix
        std::vector<int> h_csr_row_ptr(m + 1);
        std::vector<int> h_csr_col_ind(nnz);
        std::vector<T>   h_csr_val(nnz);

        // Host gebsr2csr
        host_gebsr_to_csr<T>(dir,
                             mb,
                             nb,
                             nnzb,
                             bsr_val,
                             bsr_row_ptr,
                             bsr_col_ind,
                             row_block_dim,
                             col_block_dim,
                             bsr_idx_base,
                             h_csr_val,
                             h_csr_row_ptr,
                             h_csr_col_ind,
                             csr_idx_base);

        // Unit check
        unit_check_general(1, m + 1, 1, dh_csr_row_ptr.data(), h_csr_row_ptr.data());
        unit_check_general(1, nnz, 1, dh_csr_col_ind.data(), h_csr_col_ind.data());
        unit_check_general(1, nnz, 1, dh_csr_val.data(), h_csr_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(hipsparseXgebsr2csr(handle,
                                                      dir,
                                                      mb,
                                                      nb,
                                                      bsr_descr,
                                                      dbsr_val,
                                                      dbsr_row_ptr,
                                                      dbsr_col_ind,
                                                      row_block_dim,
                                                      col_block_dim,
                                                      csr_descr,
                                                      dcsr_val,
                                                      dcsr_row_ptr,
                                                      dcsr_col_ind));
        }

        double gpu_time_used = get_time_us();

        // Performance run
        for(int iter = 0; iter < number_hot_calls; ++iter)
        {
            CHECK_HIPSPARSE_ERROR(hipsparseXgebsr2csr(handle,
                                                      dir,
                                                      mb,
                                                      nb,
                                                      bsr_descr,
                                                      dbsr_val,
                                                      dbsr_row_ptr,
                                                      dbsr_col_ind,
                                                      row_block_dim,
                                                      col_block_dim,
                                                      csr_descr,
                                                      dcsr_val,
                                                      dcsr_row_ptr,
                                                      dcsr_col_ind));
        }

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

        double gbyte_count = gebsr2csr_gbyte_count<T>(mb, row_block_dim, col_block_dim, nnzb);
        double gpu_gbyte   = get_gpu_gbyte(gpu_time_used, gbyte_count);

        display_timing_info(display_key_t::M,
                            m,
                            display_key_t::N,
                            n,
                            display_key_t::Mb,
                            mb,
                            display_key_t::Nb,
                            nb,
                            display_key_t::row_block_dim,
                            row_block_dim,
                            display_key_t::col_block_dim,
                            col_block_dim,
                            display_key_t::nnzb,
                            nnzb,
                            display_key_t::bandwidth,
                            gpu_gbyte,
                            display_key_t::time_ms,
                            get_gpu_time_msec(gpu_time_used));
    }

    return;
}

#endif // TESTING_GEBSR2CSR_HPP