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//
#ifndef G4DataQuestionaire_h
#define G4DataQuestionaire_h 1

#include "globals.hh"

#include "G4HadronElasticProcess.hh"
#include "G4ProtonInelasticProcess.hh"
#include "G4VPiKBuilder.hh"

enum G4DataType {no, photon, neutron, radioactive, lowenergy, optical, neutronxs, lend, abla};
class G4DataQuestionaire
{
  public: 
    G4DataQuestionaire(G4DataType t1=no, G4DataType t2=no, G4DataType t3=no, 
		       G4DataType t4=no, G4DataType t5=no, G4DataType t6=no,
		       G4DataType t7=no, G4DataType t8=no, G4DataType t9=no)
    {
        G4ExceptionDescription desc;
	desc << G4endl;

	G4bool fail(false);

        // always need LEdata since 9.5
    	if(!getenv("G4LEDATA") )
	  {
	     desc << "Low energy electromagnetic data are needed."<<G4endl
	          << "This is a NEW requirement for standard EM physics since geant4 9.5."<<G4endl
	          << "Please set the environmental variable G4LEDATA"<<G4endl
	          << "to point to your G4EMLOW directory. "<<G4endl
	          << "Note: EMLOW6.23 or above is needed for Bremsstrahlung data."<<G4endl
	          << "Data are available from the Geant4 download page."<<G4endl<<G4endl;
	     fail=true;
	  }
      for(G4int i=0; i<9; ++i)
      {
	G4DataType t(no);
	if(i==0) t=t1;
	if(i==1) t=t2;
	if(i==2) t=t3;
	if(i==3) t=t4;
	if(i==4) t=t5;
	if(i==5) t=t6;
	if(i==6) t=t7;
	if(i==7) t=t8;
	if(i==8) t=t9;

	switch(t)
	{
          case photon:
	    if(!getenv("G4LEVELGAMMADATA") )
	    {
	      desc << "Photon-evaporation data are needed."<<G4endl
	           << "Please set the environmental variable G4LEVELGAMMADATA"<<G4endl
	      	   << "to point to your PhotonEvaporation directory."<<G4endl
	      	   << "Data are available from the Geant4 download page."<<G4endl<<G4endl;
	      fail=true;
	    }
	    break;
          case neutron:
	    if(!getenv("G4NEUTRONHPDATA") )
	    {
	      desc << "G4NDL are needed."<<G4endl
	           << "Please set the environmental variable G4NEUTRONHPDATA"<<G4endl
	      	   << "to point to your G4NDL directory."<<G4endl
	      	   << "Data are available from the Geant4 download page."<<G4endl<<G4endl;
	      fail=true;
	    }
	    break;
          case lend:
	    if(!getenv("G4LENDDATA") )
	    {
	      desc << "Data files for Low Energy Nuclear Data (LEND) are needed."<<G4endl
	           << "Please set the environmental variable G4LENDDATA"<<G4endl
	      	   << "to point to the directory containing these LEND data."<<G4endl
	      	   << "Data files for Low Energy Nuclear Data (LEND) are available from" <<
	    		  " ftp://gdo-nuclear.ucllnl.org/pub/."<<G4endl<<G4endl;
	      fail=true;
	    }
	    break;
          case radioactive:
	    if(!getenv("G4RADIOACTIVEDATA") )
	    {
	      desc << "Radioactive decay data are needed."<<G4endl
	           << "Please set the environmental variable G4RADIOACTIVEDATA"<<G4endl
	      	   << "to point to your RadiativeDecay directory."<<G4endl
	      	   << "Data are available from the Geant4 download page."<<G4endl<<G4endl;
	      fail=true;
	    }
	    break;
          case lowenergy:
	    if(!getenv("G4LEDATA") )
	    {
	      desc << "Low energy electromagnetic data are needed."<<G4endl
	           << "Please set the environmental variable G4LEDATA"<<G4endl
	      	   << "to point to your G4EMLOW directory."<<G4endl
	      	   << "Data are available from the Geant4 download page."<<G4endl<<G4endl;
	      fail=true;
	    }
	    break;
          case optical:
	    /*
	    if(!getenv("G4REALSURFACEDATA") )
	    {
	      desc << "Data describing surface propeties for optical photons are needed."<<G4endl
	           << "Please set the environmental variable G4REALSURFACEDATA"<<G4endl
	      	   << "to point to your RealSurface directory."<<G4endl
	      	   << "Data are available from the Geant4 download page."<<G4endl<<G4endl;
	      fail=true;
	    }
	    */
	    break;
          case neutronxs:
	    if(!getenv("G4NEUTRONXSDATA") )
	    {
	      desc << "G4NEUTRONXS are needed."<<G4endl
	           << "Please set the environmental variable G4NEUTRONXSDATA"<<G4endl
	      	   << "to point to your G4NEUTRONXS directory."<<G4endl
	      	   << "Data are available from the Geant4 download page."<<G4endl<<G4endl;
	      fail=true;
	    }
	    break;
          case abla:
	    if(!getenv("G4ABLADATA") )
	    {
	      desc << "ABLA data are needed."<<G4endl
	           << "Please set the environmental variable G4ABLADATA"<<G4endl
	      	   << "to point to your ABLA data directory."<<G4endl
	      	   << "Data are available from the Geant4 download page."<<G4endl<<G4endl;
	      fail=true;
	    }
	    break;
	  case no:
	    // all ok
            break;
	  default:
            if(t!=no) 
	    {
              G4Exception("G4DataQuestionaire", "PhysicsLists003", FatalException,
	                  "data type requested is not known to the system");
	    }
	}
     }
     if (fail) {

        desc << "*** Fatal error: Missing mandatory data for this simulation engine ***"<<G4endl;
     	G4Exception("G4DataQuestionaire", "PhysicsLists002", FatalException, desc);
     }
   }
    ~G4DataQuestionaire() {}
};

#endif