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#include "globals.hh"

#include "G4Scintillation.hh"
#include "G4Cerenkov.hh"

#include "G4OpAbsorption.hh"
#include "G4OpRayleigh.hh"
#include "G4OpBoundaryProcess.hh"
#include "G4OpWLS.hh"

#include "F04OpticalPhysics.hh"

F04OpticalPhysics::F04OpticalPhysics()
    : G4VPhysicsConstructor("Optical") { }

F04OpticalPhysics::~F04OpticalPhysics() { }

#include "G4ParticleDefinition.hh"
#include "G4ParticleTable.hh"

#include "G4OpticalPhoton.hh"

void F04OpticalPhysics::ConstructParticle()
{
  G4OpticalPhoton::OpticalPhotonDefinition();
}

#include "G4ProcessManager.hh"

void F04OpticalPhysics::ConstructProcess()
{
    G4cout << "F04OpticalPhysics:: Add Optical Physics Processes"
           << G4endl;

  G4Scintillation* theScintProcess = new G4Scintillation();
  G4Cerenkov* theCerenkovProcess= new G4Cerenkov();

  G4OpAbsorption* theAbsorptionProcess= new G4OpAbsorption();
  G4OpRayleigh* theRayleighScattering = new G4OpRayleigh();
  G4OpBoundaryProcess* theBoundaryProcess = new G4OpBoundaryProcess();
  G4OpWLS* theWLSProcess=new G4OpWLS();

  G4ProcessManager* pManager = 
                G4OpticalPhoton::OpticalPhoton()->GetProcessManager();

  if (!pManager) {
     std::ostringstream o;
     o << "Optical Photon without a Process Manager";
     G4Exception("F04OpticalPhysics::ConstructProcess()","",
                  FatalException,o.str().c_str());
  }


  pManager->AddDiscreteProcess(theAbsorptionProcess);
  pManager->AddDiscreteProcess(theRayleighScattering);

  theBoundaryProcess->SetModel(unified);
//  theBoundaryProcess->SetModel(glisur);

  pManager->AddDiscreteProcess(theBoundaryProcess);

  theWLSProcess->UseTimeProfile("delta");
//  theWLSProcess->UseTimeProfile("exponential");

  pManager->AddDiscreteProcess(theWLSProcess);

  theScintProcess->SetScintillationYieldFactor(1.);
  theScintProcess->SetScintillationExcitationRatio(0.0);
  theScintProcess->SetTrackSecondariesFirst(true);

  theParticleIterator->reset();

  while( (*theParticleIterator)() ){

    G4ParticleDefinition* particle = theParticleIterator->value();
    G4String particleName = particle->GetParticleName();

    pManager = particle->GetProcessManager();
    if (!pManager) {
       std::ostringstream o;
       o << "Particle " << particleName << "without a Process Manager";
       G4Exception("F04OpticalPhysics::ConstructProcess()","",
                    FatalException,o.str().c_str());
    }

    if(theCerenkovProcess->IsApplicable(*particle)){
      pManager->AddProcess(theCerenkovProcess);
      pManager->SetProcessOrdering(theCerenkovProcess,idxPostStep);
    }
    if(theScintProcess->IsApplicable(*particle)){
      pManager->AddProcess(theScintProcess);
      pManager->SetProcessOrderingToLast(theScintProcess,idxAtRest);
      pManager->SetProcessOrderingToLast(theScintProcess,idxPostStep);
    }

  }
}