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// $Id: G4DNAMoleculeEncounterStepper.hh 64057 2012-10-30 15:04:49Z gcosmo $
//
// Author: Mathieu Karamitros (kara@cenbg.in2p3.fr)
//
// WARNING : This class is released as a prototype.
// It might strongly evolve or even disapear in the next releases.
//
// History:
// -----------
// 10 Oct 2011 M.Karamitros created
//
// -------------------------------------------------------------------

#ifndef G4MOLECULEENCOUNTERSTEPPER_H
#define G4MOLECULEENCOUNTERSTEPPER_H

#include "G4VITTimeStepper.hh"
#include "G4ITManager.hh"

class G4VDNAReactionModel;
class G4DNAMolecularReactionTable;

class G4Molecule;

/**
  * Given a molecule G4DNAMoleculeEncounterStepper will calculate for its possible reactants
  * what will be the minimum encounter time and the associated molecules.*
  *
  * This model includes dynamical time steps as explained in
  * "Computer-Aided Stochastic Modeling of the Radiolysis of Liquid Water",
  * V. Michalik, M. Begusová, E. A. Bigildeev,
  * Radiation Research, Vol. 149, No. 3 (Mar., 1998), pp. 224-236
  *
  */

class G4DNAMoleculeEncounterStepper : public G4VITTimeStepper
{
public:
    G4DNAMoleculeEncounterStepper();
    virtual ~G4DNAMoleculeEncounterStepper();
    G4DNAMoleculeEncounterStepper(const G4DNAMoleculeEncounterStepper&);
    G4IT_ADD_CLONE(G4VITTimeStepper,G4DNAMoleculeEncounterStepper)

    virtual void Prepare();
//    virtual void PrepareForAllProcessors();
    virtual G4double CalculateStep(const G4Track&, const G4double&);

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

    inline void SetVerbose(int);
    // Final time returned when reaction is avalaible in the reaction table = 1
    // All details = 2

private:

    void RetrieveResults(const G4Track&, const G4Molecule*, const G4Molecule*, const G4double /*reactionRange*/,
                         G4KDTreeResultHandle&, G4bool iterate = true);

    G4bool fHasAlreadyReachedNullTime;

    G4DNAMoleculeEncounterStepper& operator=(const G4DNAMoleculeEncounterStepper&);
    const G4DNAMolecularReactionTable*& fMolecularReactionTable ;
    G4VDNAReactionModel* fReactionModel;
    G4int fVerbose ;
};

inline void G4DNAMoleculeEncounterStepper::SetReactionModel(G4VDNAReactionModel* reactionModel)
{
    fReactionModel = reactionModel ;
}

inline G4VDNAReactionModel* G4DNAMoleculeEncounterStepper::GetReactionModel()
{
    return fReactionModel;
}

inline void G4DNAMoleculeEncounterStepper::SetVerbose(int flag)
{
    fVerbose = flag;
}

#endif // G4MOLECULEENCOUNTERSTEPPER_H