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/// \file GB07BOptrLeadingParticle.hh
/// \brief Definition of the GB07BOptrLeadingParticle class

#ifndef GB07BOptrLeadingParticle_hh
#define GB07BOptrLeadingParticle_hh 1

#include "G4VBiasingOperator.hh"
class G4BOptnLeadingParticle;
class G4VProcess;

#include <map>

class GB07BOptrLeadingParticle : public G4VBiasingOperator
{
  public:
    GB07BOptrLeadingParticle(G4String operatorName = "LeadingParticleBiasingOperator");
    ~GB07BOptrLeadingParticle() override;

  private:
    // -----------------------------
    // -- Mandatory from base class:
    // -----------------------------
    // -- Unsused:
    G4VBiasingOperation* ProposeNonPhysicsBiasingOperation(const G4Track*,
                                                           const G4BiasingProcessInterface*) final
    {
      return nullptr;
    }
    // -- Unused:
    G4VBiasingOperation* ProposeOccurenceBiasingOperation(const G4Track*,
                                                          const G4BiasingProcessInterface*) final
    {
      return nullptr;
    }
    // -- Used:
    // -- Will return the biasing operation at the final state generation stage
    G4VBiasingOperation*
    ProposeFinalStateBiasingOperation(const G4Track* track,
                                      const G4BiasingProcessInterface* callingProcess) final;

  public:
    // ------------------------------------
    // -- Optional methods from base class:
    // ------------------------------------
    void StartRun() final;
    void StartTracking(const G4Track* track) final;

  private:
    // -- The leading particle biasing operation that will actually
    // -- trim the final state generation:
    G4BOptnLeadingParticle* fLeadingParticleBiasingOperation;
    // -- Two-particle final states, they will be biased with a
    // -- "further killing probability" for particles accompanying
    // -- the leading particle, we remember what processes are concerned:
    const G4VProcess* fAnnihilation;
    const G4VProcess* fConversion;
    const G4VProcess* fDecay;
    const G4VProcess* fTwoParticleProcess;
};

#endif
