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// 
// -------------------------------------------------------------------
// $Id$
//
// Author: L.Pandola
//
// History:
// -----------
// 23 Nov 2010  L. Pandola       1st implementation
// 24 May 2011  L. Pandola       Renamed (make default Penelope)
// 13 Mar 2012  L. Pandola       Made a derived class of G4VEmAngularDistribution
//                               and update the interface accordingly
// 18 Jul 2012  L. Pandola       Migrate to the new interface of G4VEmAngularDistribution
//
// Class description:
// Calculation of angular distribution for Penelope Bremsstrahlung
// version 2008
// --------------------------------------------------------------


#ifndef G4PENELOPEBREMSSTRAHLUNGANGULAR_HH
#define G4PENELOPEBREMSSTRAHLUNGANGULAR_HH 1
#include "globals.hh"
#include <map>
#include "G4VEmAngularDistribution.hh"

class G4PhysicsTable;
class G4Material;

class G4PenelopeBremsstrahlungAngular : public G4VEmAngularDistribution
{ 

public:
  G4PenelopeBremsstrahlungAngular(); 
  ~G4PenelopeBremsstrahlungAngular();

  //! The Initialize() method forces the cleaning of tables
  void Initialize();
  
  //! Old interface, backwards compatibility. Will not work in this case
  //! it will produce a G4Exception().
  G4double PolarAngle(const G4double initial_energy,
		      const G4double final_energy,
		      const G4int Z);

  //! Samples the direction of the outgoing photon (in global coordinates). 
  //! Forces the calculation of tables, if they are not available
  G4ThreeVector& SampleDirection(const G4DynamicParticle* dp,
				 G4double out_energy,
				 G4int Z,
				 const G4Material* mat = 0);
  
  //! Set/Get Verbosity level
  void SetVerbosityLevel(G4int vl){verbosityLevel = vl;};
  G4int GetVerbosityLevel(){return verbosityLevel;};

private:
  void PrepareInterpolationTables(G4double Zeq);
  void ClearTables();

  G4double GetEffectiveZ(const G4Material* material);
  std::map<const G4Material*,G4double> *theEffectiveZSq;

  //Tables containing the Lorentz sampling coefficients 
  //The key is the effective Z of the material
  std::map<G4double,G4PhysicsTable*> *theLorentzTables1;
  std::map<G4double,G4PhysicsTable*> *theLorentzTables2;

  void ReadDataFile();
  G4bool dataRead;
  
  static const G4int NumberofZPoints=6;
  static const G4int NumberofEPoints=6;
  static const G4int NumberofKPoints=4;

  G4double QQ1[NumberofZPoints][NumberofEPoints][NumberofKPoints];
  G4double QQ2[NumberofZPoints][NumberofEPoints][NumberofKPoints];

  G4int verbosityLevel;

};


  
#endif