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/// \file polarisation/Pol01/src/PhysicsList.cc
/// \brief Implementation of the PhysicsList class
//
// 
//
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#include "PhysicsList.hh"
#include "PhysicsListMessenger.hh"
 
#include "G4EmStandardPhysics.hh"
#include "PhysListEmPolarized.hh"

#include "G4ProcessManager.hh"
#include "StepMax.hh"
#include "G4EmParameters.hh"
#include "G4EmBuilder.hh"

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PhysicsList::PhysicsList() 
: G4VModularPhysicsList(),
  fEmPhysicsList(0), fEmName("polarized"), fMessenger(0)
{
  fMessenger = new PhysicsListMessenger(this);

  G4EmParameters::Instance();

  SetVerboseLevel(1);

  fEmPhysicsList = new PhysListEmPolarized();

}

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PhysicsList::~PhysicsList()
{
  delete fMessenger;
}

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void PhysicsList::ConstructParticle()
{
  // minimal set of particles for EM physics
  G4EmBuilder::ConstructMinimalEmSet();
}

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void PhysicsList::ConstructProcess()
{
  // Transportation
  //
  AddTransportation();

  // Electromagnetic physics list
  //
  fEmPhysicsList->ConstructProcess();
    
  // step limitation (as a full process)
  //  
  AddStepMax();      
}

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void PhysicsList::AddPhysicsList(const G4String& name)
{
  if (verboseLevel>0) {
    G4cout << "PhysicsList::AddPhysicsList: <" << name << ">" << G4endl;
  }
  
  if (name == fEmName) return;

  if (name == "standard") {

    fEmName = name;
    delete fEmPhysicsList;
    fEmPhysicsList = new G4EmStandardPhysics();
            
  } else if (name == "polarized") {

    fEmName = name;
    delete fEmPhysicsList;
    fEmPhysicsList = new PhysListEmPolarized();

  } else {
    G4cout << "PhysicsList::AddPhysicsList: <" << name << ">"
           << " is not defined"
           << G4endl;
  }
}

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void PhysicsList::AddStepMax()
{
  // Step limitation seen as a process
  StepMax* stepMaxProcess = new StepMax();

  auto particleIterator=GetParticleIterator();
  particleIterator->reset();
  while ((*particleIterator)()){
      G4ParticleDefinition* particle = particleIterator->value();
      G4ProcessManager* pmanager = particle->GetProcessManager();

      if (stepMaxProcess->IsApplicable(*particle) && pmanager)
          pmanager ->AddDiscreteProcess(stepMaxProcess);
  }
}

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