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//
// GEANT4 physics class: G4ElNucleusSFcs -- header file
//
//
// 30.09.21 V. Grichine eA inelastic cross section according to the structure function approach.
//                      The XS is calculated based on the corrected CHIPS XS.
//

#ifndef G4ElNucleusSFcs_h
#define G4ElNucleusSFcs_h 1

#include "G4VCrossSectionDataSet.hh"
#include "G4DynamicParticle.hh"
#include "G4Element.hh"
#include "G4ParticleTable.hh"
#include "G4NucleiProperties.hh"
#include "G4NistManager.hh"
#include <vector>
#include "Randomize.hh"
#include "G4Electron.hh"
#include "G4Positron.hh"
#include <map>

class G4ElectroNuclearCrossSection;

class G4ElNucleusSFcs : public G4VCrossSectionDataSet
{
public:

  G4ElNucleusSFcs();
  virtual ~G4ElNucleusSFcs();
    
  static const char* Default_Name() {return "ElectronNucleusSFcs";}

  virtual void CrossSectionDescription(std::ostream&) const;

  virtual G4bool IsElementApplicable(const G4DynamicParticle*, G4int Z,
                                     const G4Material*);
  
  virtual G4double GetIsoCrossSection(const G4DynamicParticle*, G4int Z, G4int A,  
                              const G4Isotope* iso = nullptr,
                              const G4Element* elm = nullptr,
			      const G4Material* mat = nullptr );
  G4double ThresholdEnergy();

  G4double GetRatio(G4int Z, G4int A);

private:

  static const G4double fZZ[19];
  static const G4double fRR[19];

  G4ElectroNuclearCrossSection* fCHIPScs;
};

#endif