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//
//
// G4MicroElecLOPhononModel.hh, 
//               2020/05/20 P. Caron, C. Inguimbert are with ONERA [b] 
//                          Q. Gibaru is with CEA [a], ONERA [b] and CNES [c]
//                          M. Raine and D. Lambert are with CEA [a]
//
// A part of this work has been funded by the French space agency(CNES[c])
// [a] CEA, DAM, DIF - 91297 ARPAJON, France
// [b] ONERA - DPHY, 2 avenue E.Belin, 31055 Toulouse, France
// [c] CNES, 18 av.E.Belin, 31401 Toulouse CEDEX, France
//
// Based on the following publications
//
// - Q.Gibaru, C.Inguimbert, P.Caron, M.Raine, D.Lambert, J.Puech, 
//   Geant4 physics processes for microdosimetry and secondary electron emission simulation : 
//   Extension of MicroElec to very low energies and new materials
//   NIM B, 2020, in review.
//
////////////////////////////////////////////////////////////////////////
#ifndef G4MICROELECLOPHONONMODEL_HH 
#define G4MICROELECLOPHONONMODEL_HH 1 

#include "G4Step.hh"
#include "G4VDiscreteProcess.hh"
#include "G4DynamicParticle.hh"
#include "G4Material.hh"
#include "G4VEmModel.hh"
#include "G4Electron.hh"
#include "G4TransportationManager.hh"
#include "G4ParticleChangeForGamma.hh"

class G4MicroElecLOPhononModel : public G4VEmModel
{
	
  public:

    explicit G4MicroElecLOPhononModel(const G4ParticleDefinition* p = nullptr,
                                      const G4String& nam = "G4MicroElecLOPhononModel");
    ~G4MicroElecLOPhononModel() override = default;

    void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
    G4double CrossSectionPerVolume(const G4Material* material,
                                   const G4ParticleDefinition* p,
                                   G4double ekin,
                                   G4double emin = 0.0,
                                   G4double emax= DBL_MAX) override;

    void SampleSecondaries(std::vector<G4DynamicParticle*>*,
                           const G4MaterialCutsCouple*,
                           const G4DynamicParticle*,
                           G4double tmin = 0.0,
                           G4double maxEnergy = DBL_MAX) override;

    G4MicroElecLOPhononModel& operator=(const G4MicroElecLOPhononModel&) = delete;
    G4MicroElecLOPhononModel(const G4MicroElecLOPhononModel&) = delete;

  private:

    G4ParticleChangeForGamma* fParticleChangeForGamma = nullptr;
    G4double phononEnergy = 0.;
    G4bool Interband = false;
    G4bool isInitialised = false;
    G4bool absor = false;
    G4double Eprim = 0;
    G4double signe = -1;				 			  
};

#endif