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// ====================================================================
//
//   HepMCG4PythiaInterface.hh
//   $Id: HepMCG4PythiaInterface.hh,v 1.5 2006/06/29 17:10:14 gunter Exp $
//
//   A generic interface class with Pythia event generator via HepMC.
//
// ====================================================================
#ifndef HEPMC_G4_PYTHIA_INTERFACE_H
#define HEPMC_G4_PYTHIA_INTERFACE_H

#include "HepMCG4Interface.hh"
#include "HepMC/IO_HEPEVT.h"

class HepMCG4PythiaMessenger;

class HepMCG4PythiaInterface : public HepMCG4Interface {
protected:
  G4int verbose;
  G4int mpylist;
  HepMC::IO_HEPEVT hepevtio;

  HepMCG4PythiaMessenger* messenger;

  // In default, this is automatic conversion, Pythia->HEPEVT->HepMC, 
  // by HepMC utilities.
  virtual HepMC::GenEvent* GenerateHepMCEvent();

public:
  HepMCG4PythiaInterface();
  ~HepMCG4PythiaInterface();

  // set/get methods
  void SetVerboseLevel(G4int i);
  G4int GetVerboseLevel() const; 

  void SetPylist(G4int i);
  G4int GetPylist() const; 

  // call pyxxx
  void CallPyinit(G4String frame, G4String beam, G4String target, 
		  G4double win);
  void CallPystat(G4int istat);

  // random numbers operations
  void SetRandomSeed(G4int iseed);
  void CallPygive(G4String par);
  void CallPyrget(G4int lun, G4int move);
  void CallPyrset(G4int lun, G4int move);
  void PrintRandomStatus(std::ostream& ostr=G4cout) const;

  // setup user parameters (empty in default).
  // Implement your parameters in a delived class if you want.
  virtual void SetUserParameters();

  virtual void Print() const;
};

// ====================================================================
// inline functions
// ====================================================================

inline void HepMCG4PythiaInterface::SetVerboseLevel(G4int i)
{
  verbose= i;
}

inline G4int HepMCG4PythiaInterface::GetVerboseLevel() const
{
  return verbose;
}

inline void HepMCG4PythiaInterface::SetPylist(G4int i)
{
  mpylist= i;
}

inline G4int HepMCG4PythiaInterface::GetPylist() const
{
  return mpylist;
}

#endif