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//
// G4AdjointStackingAction
//
// Class description:
//
// Stacking action used in the adjoint simulation. It is responsible to kill
// a primary forward particle before it is traked in the forward phase,
// if the last adjoint particle did not reach the adjoint surface.
// Was needed for the new design where the G4AdjointSimManager is no more an
// extension of G4RunManager. If the primary particles are not killed before
// being tracked in the sensitive geometry, the User Stacking action can be
// used during the forward phase if specified by the method
// G4AdjointSimManager::UseUserStackingAction(G4bool). 

// Author: L. Desorgher, SpaceIT GmbH - April 2008
// Contract: ESA contract 21435/08/NL/AT
// Customer: ESA/ESTEC
// --------------------------------------------------------------------
#ifndef G4AdjointStackingAction_hh
#define G4AdjointStackingAction_hh 1

#include "globals.hh"
#include "G4UserStackingAction.hh"

class G4Track;
class G4ParticleDefinition;
class G4AdjointTrackingAction;

class G4AdjointStackingAction : public G4UserStackingAction
{
  public:

    explicit G4AdjointStackingAction(G4AdjointTrackingAction* anAction);
    ~G4AdjointStackingAction() override = default;

    G4ClassificationOfNewTrack ClassifyNewTrack(const G4Track* aTrack) override;
    void NewStage() override;
    void PrepareNewEvent() override;
    inline void SetUserFwdStackingAction(G4UserStackingAction* anAction)
      { theFwdStackingAction = anAction; }
    inline void SetUserAdjointStackingAction(G4UserStackingAction* anAction)
      { theUserAdjointStackingAction = anAction; }
    inline void SetKillTracks(G4bool aBool)
      { kill_tracks =aBool; }
    inline void SetAdjointMode(G4bool aBool)
      { adjoint_mode=aBool; }

  private:

    G4UserStackingAction* theFwdStackingAction = nullptr;
    G4UserStackingAction* theUserAdjointStackingAction = nullptr;
    G4bool reclassification_stage = false;
    G4bool first_reclassification_stage = false;
    G4bool kill_tracks = false;
    G4bool adjoint_mode = false;
    G4AdjointTrackingAction* theAdjointTrackingAction = nullptr;
};

#endif