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/// \file GB02BOptrMultiParticleForceCollision.hh
/// \brief Definition of the GB02BOptrMultiParticleForceCollision class

#ifndef GB02BOptrMultiParticleForceCollision_hh
#define GB02BOptrMultiParticleForceCollision_hh 1

#include "G4VBiasingOperator.hh"
class G4BOptrForceCollision;
class G4ParticleDefinition;

#include <map>

class GB02BOptrMultiParticleForceCollision : public G4VBiasingOperator
{
  public:
    GB02BOptrMultiParticleForceCollision();
    ~GB02BOptrMultiParticleForceCollision() override = default;

    // --------------------------
    // -- Specific to this class:
    // --------------------------
    // -- Declare particles to be biased:
    void AddParticle(G4String particleName);

  private:
    // -----------------------------
    // -- Mandatory from base class:
    // -----------------------------
    G4VBiasingOperation*
    ProposeNonPhysicsBiasingOperation(const G4Track* track,
                                      const G4BiasingProcessInterface* callingProcess) final;
    G4VBiasingOperation*
    ProposeOccurenceBiasingOperation(const G4Track* track,
                                     const G4BiasingProcessInterface* callingProcess) final;
    G4VBiasingOperation*
    ProposeFinalStateBiasingOperation(const G4Track* track,
                                      const G4BiasingProcessInterface* callingProcess) final;

  private:
    // -------------------------------
    // -- Optionnal, from base class :
    // -------------------------------
    // -- Here, these are needed implementions to forward calls to the underneath
    // -- G4BOptrForceCollision biasing operator
    void OperationApplied(const G4BiasingProcessInterface* callingProcess,
                          G4BiasingAppliedCase biasingCase, G4VBiasingOperation* operationApplied,
                          const G4VParticleChange* particleChangeProduced) final;
    void OperationApplied(const G4BiasingProcessInterface* callingProcess,
                          G4BiasingAppliedCase biasingCase,
                          G4VBiasingOperation* occurenceOperationApplied,
                          G4double weightForOccurenceInteraction,
                          G4VBiasingOperation* finalStateOperationApplied,
                          const G4VParticleChange* particleChangeProduced) final;

    void ExitBiasing(const G4Track*, const G4BiasingProcessInterface*) final;

  public:
    void StartTracking(const G4Track* track) final;

  private:
    std::map<const G4ParticleDefinition*, G4BOptrForceCollision*> fBOptrForParticle;
    std::vector<const G4ParticleDefinition*> fParticlesToBias;
    G4BOptrForceCollision* fCurrentOperator;
};

#endif