/*
  Copyright 2020 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_PY_BASE_SIMULATOR_HEADER_INCLUDED
#define OPM_PY_BASE_SIMULATOR_HEADER_INCLUDED

#include <opm/models/utils/parametersystem.hpp>
#include <opm/models/utils/propertysystem.hh>

#include <opm/simulators/flow/FlowMain.hpp>
#include <opm/simulators/flow/python/PyMain.hpp>
#include <opm/simulators/flow/python/PyFluidState.hpp>
#include <opm/simulators/flow/python/PyMaterialState.hpp>
#include <opm/simulators/flow/python/Pybind11Exporter.hpp>

#include <opm/input/eclipse/EclipseState/EclipseState.hpp>
#include <opm/input/eclipse/EclipseState/SummaryConfig/SummaryConfig.hpp>
#include <opm/input/eclipse/Schedule/Schedule.hpp>
#include <opm/input/eclipse/Deck/Deck.hpp>

#include <map>
#include <memory>
#include <string>
#include <vector>

namespace Opm::Pybind {

template<class TypeTag>
class PyBaseSimulator
{
private:
    using Simulator = Opm::GetPropType<TypeTag, Opm::Properties::Simulator>;

public:
    PyBaseSimulator(const std::string& deckFilename,
                    const std::vector<std::string>& args);
    PyBaseSimulator(std::shared_ptr<Opm::Deck> deck,
                    std::shared_ptr<Opm::EclipseState> state,
                    std::shared_ptr<Opm::Schedule> schedule,
                    std::shared_ptr<Opm::SummaryConfig> summary_config,
                    const std::vector<std::string>& args);

    void advance(int report_step);
    bool checkSimulationFinished();
    int currentStep();
    py::array_t<double> getFluidStateVariable(const std::string &name) const;
    py::array_t<double> getCellVolumes();
    double getDT();
    py::array_t<double> getPorosity();
    py::array_t<double> getPrimaryVariable(const std::string &variable) const;
    py::array_t<int> getPrimaryVarMeaning(const std::string &variable) const;
    std::map<std::string, int> getPrimaryVarMeaningMap(const std::string &variable) const;
    int run();
    void setPorosity(
         py::array_t<double, py::array::c_style | py::array::forcecast> array);
    void setPrimaryVariable(
        const std::string &idx_name,
        py::array_t<double,
        py::array::c_style | py::array::forcecast> array);
    void setupMpi(bool init_mpi, bool finalize_mpi);
    int step();
    int stepCleanup();
    int stepInit();

protected:
    Opm::FlowMain<TypeTag>& getFlowMain() const;
    PyFluidState<TypeTag>& getFluidState() const;
    PyMaterialState<TypeTag>& getMaterialState() const;

    const std::string deck_filename_;
    bool has_run_init_ = false;
    bool has_run_cleanup_ = false;
    bool mpi_init_ = true;
    bool mpi_finalize_ = true;
    //bool debug_ = false;

    // NOTE: the main_ pointer *must* be declared before the flow_main_ pointer
    // to ensure that it is destroyed before the main object since the main object
    // destructor will call MPI_Finalize() and flow_main_ object destructor will call
    // MPI_Comm_free().
    std::unique_ptr<Opm::PyMain<TypeTag>> main_;
    std::unique_ptr<Opm::FlowMain<TypeTag>> flow_main_;
    Simulator* simulator_;
    std::unique_ptr<PyFluidState<TypeTag>> fluid_state_;
    std::unique_ptr<PyMaterialState<TypeTag>> material_state_;
    std::shared_ptr<Opm::Deck> deck_;
    std::shared_ptr<Opm::EclipseState> eclipse_state_;
    std::shared_ptr<Opm::Schedule> schedule_;
    std::shared_ptr<Opm::SummaryConfig> summary_config_;
    std::vector<std::string> args_;
};  // class PyBaseSimulator

}  // namespace Opm::Pybind

#include <opm/simulators/flow/python/PyBaseSimulator_impl.hpp>

#endif  // OPM_PY_BASE_SIMULATOR_HEADER_INCLUDED