////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2019-     Equinor ASA
//
//  ResInsight is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
//  FITNESS FOR A PARTICULAR PURPOSE.
//
//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
//  for more details.
//
/////////////////////////////////////////////////////////////////////////////////

#include "RifActiveCellsReader.h"

#include "ert/ecl/ecl_file.hpp"
#include "ert/ecl/ecl_grid.hpp"
#include "ert/ecl/ecl_kw_magic.hpp"

#include "cafAssert.h"

#include "RiaStringEncodingTools.h"

#include "RifEclipseOutputFileTools.h"

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
std::vector<std::vector<int>> RifActiveCellsReader::activeCellsFromActnumKeyword(const ecl_file_type* ecl_file)
{
    CAF_ASSERT(ecl_file);

    std::vector<std::vector<int>> activeCellsAllGrids;

    int actnumKeywordCount = ecl_file_get_num_named_kw(ecl_file, ACTNUM_KW);
    for (size_t gridIdx = 0; gridIdx < static_cast<size_t>(actnumKeywordCount); gridIdx++)
    {
        std::vector<int> nativeActnumvValues;
        RifEclipseOutputFileTools::keywordData(ecl_file, ACTNUM_KW, gridIdx, &nativeActnumvValues);

        activeCellsAllGrids.push_back(nativeActnumvValues);
    }

    return activeCellsAllGrids;
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
std::vector<std::vector<int>> RifActiveCellsReader::activeCellsFromPorvKeyword(const ecl_file_type* ecl_file, bool dualPorosity)
{
    CAF_ASSERT(ecl_file);

    std::vector<std::vector<int>> activeCellsAllGrids;

    // Active cell count is always the same size as the number of cells in the grid
    // If we have dual porosity, we have to divide by 2
    //
    // See documentation of active cells in top of ecl_grid.cpp

    int porvKeywordCount = ecl_file_get_num_named_kw(ecl_file, PORV_KW);
    for (size_t gridIdx = 0; gridIdx < static_cast<size_t>(porvKeywordCount); gridIdx++)
    {
        std::vector<double> porvValues;
        RifEclipseOutputFileTools::keywordData(ecl_file, PORV_KW, gridIdx, &porvValues);

        std::vector<int> activeCellsOneGrid;

        size_t activeCellCount = porvValues.size();
        if (dualPorosity)
        {
            activeCellCount /= 2;
        }
        activeCellsOneGrid.resize(activeCellCount, 0);

        for (size_t poreValueIndex = 0; poreValueIndex < porvValues.size(); poreValueIndex++)
        {
            size_t indexToCell = poreValueIndex;
            if (indexToCell >= activeCellCount)
            {
                indexToCell = poreValueIndex - activeCellCount;
            }

            if (porvValues[poreValueIndex] > 0.0)
            {
                if (!dualPorosity || poreValueIndex < porvValues.size() / 2)
                {
                    activeCellsOneGrid[indexToCell] = CELL_ACTIVE_MATRIX;
                }
                else
                {
                    activeCellsOneGrid[indexToCell] += CELL_ACTIVE_FRACTURE;
                }
            }
            else
            {
                activeCellsOneGrid[indexToCell] = 0;
            }
        }

        activeCellsAllGrids.push_back(activeCellsOneGrid);
    }

    return activeCellsAllGrids;
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RifActiveCellsReader::applyActiveCellsToAllGrids(ecl_grid_type*                       ecl_main_grid,
                                                      const std::vector<std::vector<int>>& activeCellsForAllGrids)
{
    CAF_ASSERT(ecl_main_grid);

    for (int gridIndex = 0; gridIndex < static_cast<int>(activeCellsForAllGrids.size()); gridIndex++)
    {
        ecl_grid_type* currentGrid = ecl_main_grid;
        if (gridIndex > 0)
        {
            currentGrid = ecl_grid_iget_lgr(ecl_main_grid, gridIndex - 1);
        }

        auto activeCellsForGrid = activeCellsForAllGrids[gridIndex];
        CAF_ASSERT(ecl_grid_get_global_size(currentGrid) == static_cast<int>(activeCellsForGrid.size()));

        int* actnum_values = activeCellsForGrid.data();

        ecl_grid_reset_actnum(currentGrid, actnum_values);
    }
}