/*
   Copyright 2019 Equinor ASA.

   This file is part of the Open Porous Media project (OPM).

   OPM 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.

   OPM 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 for more details.

   You should have received a copy of the GNU General Public License
   along with OPM.  If not, see <http://www.gnu.org/licenses/>.
   */

#ifndef OPM_IO_ESMRY_HPP
#define OPM_IO_ESMRY_HPP

#include <ostream>
#include <string>
#include <unordered_map>
#include <vector>

#include <opm/common/utility/FileSystem.hpp>
#include <opm/io/eclipse/SummaryNode.hpp>

namespace Opm { namespace EclIO {

class ESmry
{
public:

    // input is smspec (or fsmspec file)
    explicit ESmry(const std::string& filename, bool loadBaseRunData=false);

    int numberOfVectors() const { return nVect; }

    bool hasKey(const std::string& key) const;

    const std::vector<float>& get(const std::string& name) const;
    const std::vector<float>& get(const SummaryNode& node) const;

    std::vector<float> get_at_rstep(const std::string& name) const;
    std::vector<float> get_at_rstep(const SummaryNode& node) const;

    const std::vector<int>& get_startdat() const { return startdat; }

    const std::vector<std::string>& keywordList() const;
    const std::vector<SummaryNode>& summaryNodeList() const;

    int timestepIdxAtReportstepStart(const int reportStep) const;

    size_t numberOfTimeSteps() const { return param[0].size(); }

    const std::string& get_unit(const std::string& name) const;
    const std::string& get_unit(const SummaryNode& node) const;

    void write_rsm(std::ostream&) const;
    void write_rsm_file(std::optional<Opm::filesystem::path> = std::nullopt) const;

private:
    Opm::filesystem::path inputFileName;
    int nVect, nI, nJ, nK;

    void ijk_from_global_index(int glob, int &i, int &j, int &k) const;
    std::vector<std::vector<float>> param;
    std::vector<std::string> keyword;
    std::vector<SummaryNode> summaryNodes;
    std::unordered_map<std::string, std::string> kwunits;

    std::vector<int> seqIndex;
    std::vector<int> startdat;

    std::vector<std::string> checkForMultipleResultFiles(const Opm::filesystem::path& rootN, bool formatted) const;

    void getRstString(const std::vector<std::string>& restartArray,
                      Opm::filesystem::path& pathRst,
                      Opm::filesystem::path& rootN) const;

    void updatePathAndRootName(Opm::filesystem::path& dir, Opm::filesystem::path& rootN) const;

    std::string makeKeyString(const std::string& keyword, const std::string& wgname, int num) const;

    std::string unpackNumber(const SummaryNode&) const;
    std::string lookupKey(const SummaryNode&) const;

    void write_block(std::ostream &, const std::vector<SummaryNode>&) const;


    template <typename T>
    std::vector<T> rstep_vector(const std::vector<T>& full_vector) const {
        std::vector<T> rstep_vector;
        rstep_vector.reserve(seqIndex.size());

        for (const auto& ind : seqIndex){
            rstep_vector.push_back(full_vector[ind]);
        }

        return rstep_vector;
    }
};

}} // namespace Opm::EclIO

inline std::ostream& operator<<(std::ostream& os, const Opm::EclIO::ESmry& smry) {
    smry.write_rsm(os);

    return os;
}

#endif // OPM_IO_ESMRY_HPP