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// G4ParticleChangeForLoss
//
// Class description:
//
// Concrete class for ParticleChange for EnergyLoss.

// Author: Hisaya Kurashige, 23 March 1998  
// Revision: Vladimir Ivantchenko, 16 January 2004
// --------------------------------------------------------------------
#ifndef G4ParticleChangeForLoss_hh
#define G4ParticleChangeForLoss_hh 1

#include "globals.hh"
#include "G4ios.hh"
#include "G4VParticleChange.hh"

class G4DynamicParticle;

class G4ParticleChangeForLoss : public G4VParticleChange
{
  public:

    G4ParticleChangeForLoss();
      // Default constructor

    virtual ~G4ParticleChangeForLoss();
      // Destructor

  // --- the following methods are for updating G4Step -----

    G4Step* UpdateStepForAlongStep(G4Step* Step);
    G4Step* UpdateStepForPostStep(G4Step* Step);
      // A physics process gives the final state of the particle
      // based on information of G4Track

    void InitializeForAlongStep(const G4Track&);
    void InitializeForPostStep(const G4Track&);
      // Initialize all properties by using G4Track information

    inline G4double GetProposedCharge() const;
    inline void SetProposedCharge(G4double theCharge);
      // Get/Set theCharge

    inline G4double GetCharge() const;
    inline void ProposeCharge(G4double finalCharge);
      // Get/Propose the final dynamical charge in G4DynamicParticle

    inline G4double GetProposedKineticEnergy() const;
    inline void SetProposedKineticEnergy(G4double proposedKinEnergy);
      // Get/Set the final kinetic energy of the current particle

    inline const G4ThreeVector& GetProposedMomentumDirection() const;
    inline void SetProposedMomentumDirection(const G4ThreeVector& dir);
    inline const G4ThreeVector& GetMomentumDirection() const;
    inline void ProposeMomentumDirection(G4double Px, G4double Py, G4double Pz);
    inline void ProposeMomentumDirection(const G4ThreeVector& Pfinal);
      // Get/Propose the MomentumDirection vector: it is the final momentum
      // direction

    inline const G4ThreeVector& GetProposedPolarization() const;
    inline void ProposePolarization(const G4ThreeVector& dir);
    inline void ProposePolarization(G4double Px, G4double Py, G4double Pz);

    inline const G4Track* GetCurrentTrack() const;

    inline void SetLowEnergyLimit(G4double elimit);

    virtual void DumpInfo() const;

    virtual G4bool CheckIt(const G4Track&);

  protected:

    G4ParticleChangeForLoss(const G4ParticleChangeForLoss& right);
    G4ParticleChangeForLoss& operator=(const G4ParticleChangeForLoss& right);
      // Hidden copy constructor and assignment operator

  private:

    const G4Track* currentTrack = nullptr;
      // The pointer to G4Track

    G4double proposedKinEnergy = 0.0;
      // The final kinetic energy of the current particle

    G4double lowEnergyLimit = 0.0;
      // The limit kinetic energy below which particle is stopped

    G4double currentCharge = 0.0;
      // The final charge of the current particle

    G4ThreeVector proposedMomentumDirection;
      // The final momentum direction of the current particle

    G4ThreeVector proposedPolarization;
      // The final polarization of the current particle
};

// ----------------------
// Inline methods
// ----------------------

inline
G4double G4ParticleChangeForLoss::GetProposedKineticEnergy() const
{
  return proposedKinEnergy;
}

inline
void G4ParticleChangeForLoss::SetProposedKineticEnergy(G4double energy)
{
  proposedKinEnergy = energy;
}

inline
G4double G4ParticleChangeForLoss::GetProposedCharge() const
{
  return currentCharge;
}

inline
G4double G4ParticleChangeForLoss::GetCharge() const
{
  return currentCharge;
}

inline
void G4ParticleChangeForLoss::SetProposedCharge(G4double theCharge)
{
  currentCharge = theCharge;
}

inline
void G4ParticleChangeForLoss::ProposeCharge(G4double theCharge)
{
  currentCharge = theCharge;
}

inline
const G4ThreeVector&
G4ParticleChangeForLoss::GetProposedMomentumDirection() const
{
  return proposedMomentumDirection;
}

inline
const G4ThreeVector& G4ParticleChangeForLoss::GetMomentumDirection() const
{
  return proposedMomentumDirection;
}

inline
void G4ParticleChangeForLoss::ProposeMomentumDirection(const G4ThreeVector& dir)
{
  proposedMomentumDirection = dir;
}

inline
void
G4ParticleChangeForLoss::SetProposedMomentumDirection(const G4ThreeVector& dir)
{
  proposedMomentumDirection = dir;
}

inline
void G4ParticleChangeForLoss::ProposeMomentumDirection(G4double Px,
                                                       G4double Py,
                                                       G4double Pz)
{
  proposedMomentumDirection.setX(Px);
  proposedMomentumDirection.setY(Py);
  proposedMomentumDirection.setZ(Pz);
}

inline
const G4Track* G4ParticleChangeForLoss::GetCurrentTrack() const
{
  return currentTrack;
}

inline
const G4ThreeVector& G4ParticleChangeForLoss::GetProposedPolarization() const
{
  return proposedPolarization;
}

inline
void G4ParticleChangeForLoss::ProposePolarization(const G4ThreeVector& dir)
{
  proposedPolarization = dir;
}

inline
void G4ParticleChangeForLoss::ProposePolarization(G4double Px,
                                                  G4double Py,
                                                  G4double Pz)
{
  proposedPolarization.setX(Px);
  proposedPolarization.setY(Py);
  proposedPolarization.setZ(Pz);
}

inline
void G4ParticleChangeForLoss::InitializeForAlongStep(const G4Track& track)
{
  theStatusChange             = track.GetTrackStatus();
  theLocalEnergyDeposit       = 0.0;
  theNonIonizingEnergyDeposit = 0.0;
  InitializeSecondaries(track);
  theParentWeight = track.GetWeight();
  //  isParentWeightProposed = false;
  proposedKinEnergy = track.GetKineticEnergy();
  currentCharge     = track.GetDynamicParticle()->GetCharge();
}

inline
void G4ParticleChangeForLoss::InitializeForPostStep(const G4Track& track)
{
  theStatusChange             = track.GetTrackStatus();
  theLocalEnergyDeposit       = 0.0;
  theNonIonizingEnergyDeposit = 0.0;
  InitializeSecondaries(track);
  theParentWeight = track.GetWeight();
  // isParentWeightProposed = false;
  proposedKinEnergy         = track.GetKineticEnergy();
  currentCharge             = track.GetDynamicParticle()->GetCharge();
  proposedMomentumDirection = track.GetMomentumDirection();
  proposedPolarization      = track.GetPolarization();
  currentTrack              = &track;
}

inline
void G4ParticleChangeForLoss::SetLowEnergyLimit(G4double elimit)
{
  lowEnergyLimit = elimit;
}

#endif