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//
// Calculation of the nucleus-nucleus total, inelastic, production, 
// elastic and quasi-elastic  cross-sections
// based on parametrisations of nucleon-nucleon
// cross-sections  in 
// the framework of simplified Glauber-Gribov approach
//
//
// 24.11.08 V. Grichine - first implementation based on G4GlauberGribovCrossSection
//
//

#ifndef G4GGNuclNuclCrossSection_h
#define G4GGNuclNuclCrossSection_h

#include "globals.hh"
#include "G4Proton.hh"
#include "G4Nucleus.hh"
#include "G4NistManager.hh"

#include "G4VCrossSectionDataSet.hh"

class G4ParticleDefinition;
class G4HadronNucleonXsc;

class G4GGNuclNuclCrossSection : public G4VCrossSectionDataSet
{
public:

  G4GGNuclNuclCrossSection ();
  virtual ~G4GGNuclNuclCrossSection ();
    
  static const char* Default_Name() {return "Glauber-Gribov nucleus nucleus";}

   
  virtual
  G4bool IsElementApplicable(const G4DynamicParticle*, 
			     G4int Z, const G4Material*);

  virtual
  G4double GetElementCrossSection(const G4DynamicParticle*, 
				  G4int Z, const G4Material*);

  G4double GetZandACrossSection(const G4DynamicParticle*, 
				G4int Z, G4int A);

  G4double GetCoulombBarier(const G4DynamicParticle*, 
			    G4double Z, G4double A, G4double pR, G4double tR);

  virtual
  void BuildPhysicsTable(const G4ParticleDefinition&)
  {}

  virtual
  void DumpPhysicsTable(const G4ParticleDefinition&) 
  {G4cout << "G4NuclNuclCrossSection: uses Glauber-Gribov formula"<<G4endl;}

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

  G4double GetRatioSD(const G4DynamicParticle*, G4double At, G4double Zt);
  G4double GetRatioQE(const G4DynamicParticle*, G4double At, G4double Zt);

  G4double GetHadronNucleonXsc(const G4DynamicParticle*, const G4Element*);
  G4double GetHadronNucleonXsc(const G4DynamicParticle*, G4int At, G4int Zt);

 
  G4double GetHadronNucleonXscPDG(G4ParticleDefinition*,G4double sMand, G4ParticleDefinition*);
  G4double GetHadronNucleonXscNS(G4ParticleDefinition*,G4double pTkin, G4ParticleDefinition*);

  G4double GetHNinelasticXscVU(const G4DynamicParticle*, G4int At, G4int Zt);
  G4double CalculateEcmValue(const G4double, const G4double, const G4double); 
  G4double CalcMandelstamS( const G4double , const G4double , const G4double );

  G4double GetElasticGlauberGribov(const G4DynamicParticle*,G4int Z, G4int A);
  G4double GetInelasticGlauberGribov(const G4DynamicParticle*,G4int Z, G4int A);

  G4double GetTotalGlauberGribovXsc()    { return fTotalXsc;     }; 
  G4double GetElasticGlauberGribovXsc()  { return fElasticXsc;   }; 
  G4double GetInelasticGlauberGribovXsc(){ return fInelasticXsc; }; 
  G4double GetProductionGlauberGribovXsc(){ return fProductionXsc; }; 
  G4double GetDiffractionGlauberGribovXsc(){ return fDiffractionXsc; }; 
  G4double GetRadiusConst()              { return fRadiusConst;  }; 

  G4double GetNucleusRadius(const G4DynamicParticle*, const G4Element*);

  G4double GetNucleusRadius(G4double Zt, G4double At);
  G4double GetNucleusRadiusGG(G4double At);
  G4double GetNucleusRadiusDE(G4double Z, G4double A);
  G4double GetNucleusRadiusRMS(G4double Z, G4double A);

  inline void SetEnergyLowerLimit(G4double E ){fLowerLimit=E;};

private:

  const G4double fUpperLimit;
  G4double fLowerLimit; 
  const G4double fRadiusConst;
 
  G4double fTotalXsc, fElasticXsc, fInelasticXsc, fProductionXsc, fDiffractionXsc;
  G4double fHadronNucleonXsc;
 
  G4ParticleDefinition* theProton;
  G4ParticleDefinition* theNeutron;
  G4HadronNucleonXsc* hnXsc;
};

////////////////////////////////////////////////////////////////
//
// Inlines

inline G4double
G4GGNuclNuclCrossSection::GetElasticGlauberGribov(const G4DynamicParticle* dp,
                                                  G4int Z, G4int A)
{
  GetZandACrossSection(dp, Z, A);
  return fElasticXsc;
}

/////////////////////////////////////////////////////////////////

inline G4double
G4GGNuclNuclCrossSection::GetInelasticGlauberGribov(const G4DynamicParticle* dp,
                                                    G4int Z, G4int A)
{
  GetZandACrossSection(dp, Z, A);
  return fInelasticXsc;
}

#endif