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

#ifndef WLSTrajectory_h
#define WLSTrajectory_h 1

#include "G4Allocator.hh"
#include "G4ParticleDefinition.hh"
#include "G4Step.hh"
#include "G4Track.hh"
#include "G4TrajectoryPoint.hh"
#include "G4VTrajectory.hh"
#include "globals.hh"

#include <vector>

typedef std::vector<G4VTrajectoryPoint*> WLSTrajectoryPointContainer;

class WLSTrajectory : public G4VTrajectory
{
  public:
    WLSTrajectory() = default;
    WLSTrajectory(const G4Track*);
    WLSTrajectory(WLSTrajectory&);
    ~WLSTrajectory() override;

    inline void* operator new(size_t);
    inline void operator delete(void*);
    inline int operator==(const WLSTrajectory& right) const { return (this == &right); }

    inline G4int GetTrackID() const override { return fTrackID; }
    inline G4int GetParentID() const override { return fParentID; }
    inline G4String GetParticleName() const override { return fParticleName; }
    inline G4double GetCharge() const override { return fPDGCharge; }
    inline G4int GetPDGEncoding() const override { return fPDGEncoding; }
    inline G4ThreeVector GetInitialMomentum() const override { return fInitialMomentum; }

    void ShowTrajectory(std::ostream& os = G4cout) const override;
    void AppendStep(const G4Step* aStep) override;
    void MergeTrajectory(G4VTrajectory* secondTrajectory) override;

    G4ParticleDefinition* GetParticleDefinition();

    int GetPointEntries() const override { return fpPointsContainer->size(); }
    G4VTrajectoryPoint* GetPoint(G4int i) const override { return (*fpPointsContainer)[i]; }

    const std::map<G4String, G4AttDef>* GetAttDefs() const override;
    std::vector<G4AttValue>* CreateAttValues() const override;

  private:
    WLSTrajectoryPointContainer* fpPointsContainer = nullptr;

    G4int fTrackID = 0;
    G4int fParentID = 0;
    G4double fPDGCharge = 0.;
    G4int fPDGEncoding = 0;
    G4String fParticleName;
    G4ThreeVector fInitialMomentum;

    G4ParticleDefinition* fParticleDefinition = nullptr;
};

extern G4ThreadLocal G4Allocator<WLSTrajectory>* WLSTrajectoryAllocator;

inline void* WLSTrajectory::operator new(size_t)
{
  if (!WLSTrajectoryAllocator) WLSTrajectoryAllocator = new G4Allocator<WLSTrajectory>;
  return (void*)WLSTrajectoryAllocator->MallocSingle();
}

inline void WLSTrajectory::operator delete(void* aTrajectory)
{
  WLSTrajectoryAllocator->FreeSingle((WLSTrajectory*)aTrajectory);
}

#endif
