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//
// Author: Mathieu Karamitros

// The code is developed in the framework of the ESA AO7146
//
// We would be very happy hearing from you, send us your feedback! :)
//
// In order for Geant4-DNA to be maintained and still open-source,
// article citations are crucial. 
// If you use Geant4-DNA chemistry and you publish papers about your software, 
// in addition to the general paper on Geant4-DNA:
//
// Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
//
// we would be very happy if you could please also cite the following
// reference papers on chemistry:
//
// J. Comput. Phys. 274 (2014) 841-882
// Prog. Nucl. Sci. Tec. 2 (2011) 503-508 

#pragma once

#include <G4String.hh>
#include <G4VITStepModel.hh>

class G4DNAMolecularReactionTable;
class G4VDNAReactionModel;

/**
  * G4DNAMolecularStepByStepModel :
  *  - TimeStepper : G4DNAMolecularEncounterStepper
  *  - ReactionProcess : G4DNAMolecularReaction
  * Before each step, the next minimum encounter time is calculated for each
  * pair of molecule. The minimum time step is selected. All the molecules are stepped
  * within this time step. Then, only the relevant pair of molecules are checked for
  * reaction.
  */
class G4DNAMolecularStepByStepModel : public G4VITStepModel
{
public:
    G4DNAMolecularStepByStepModel(const G4String& name = "DNAMolecularStepByStepModel");
    G4DNAMolecularStepByStepModel(const G4String& name,
                                  std::unique_ptr<G4VITTimeStepComputer> pTimeStepper,
                                  std::unique_ptr<G4VITReactionProcess> pReactionProcess);
    G4DNAMolecularStepByStepModel& operator=(const G4DNAMolecularStepByStepModel&) = delete;
    G4DNAMolecularStepByStepModel(const G4DNAMolecularStepByStepModel&) = delete;
    ~G4DNAMolecularStepByStepModel() override;

    void PrintInfo() override;
    void Initialize() override;

    void SetReactionModel(G4VDNAReactionModel*);
    G4VDNAReactionModel* GetReactionModel();

protected:
    const G4DNAMolecularReactionTable*& fMolecularReactionTable;
    std::unique_ptr<G4VDNAReactionModel> fpReactionModel;
};