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/// \file BiasingOperator.cc
/// \brief Implementation of the BiasingOperator class

#include "BiasingOperator.hh"

#include "BiasingOperation.hh"

#include "G4BiasingProcessInterface.hh"
#include "G4ParticleDefinition.hh"
#include "G4ParticleTable.hh"

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BiasingOperator::BiasingOperator() : G4VBiasingOperator("BiasingOperator")
{
  fBiasingOperation = new BiasingOperation("BiasingOperation");
}

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void BiasingOperator::AddParticle(G4String particleName)
{
  const G4ParticleDefinition* particle =
    G4ParticleTable::GetParticleTable()->FindParticle(particleName);
  if (particle == 0) {
    G4ExceptionDescription ed;
    ed << "Particle `" << particleName << "' not found !" << G4endl;
    G4Exception("BiasingOperator::AddParticle(...)", "BiasError", JustWarning, ed);
    return;
  }
  fParticlesToBias.push_back(particle);
}

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G4VBiasingOperation*
BiasingOperator::ProposeFinalStateBiasingOperation(const G4Track*,
                                                   const G4BiasingProcessInterface* callingProcess)
{
  // Apply the biasing operation only for inelastic processes of:
  // proton, neutron, pion+ and pion-
  if (callingProcess && callingProcess->GetWrappedProcess()
      && (callingProcess->GetWrappedProcess()->GetProcessName() == "protonInelastic"
          || callingProcess->GetWrappedProcess()->GetProcessName() == "neutronInelastic"
          || callingProcess->GetWrappedProcess()->GetProcessName() == "pi+Inelastic"
          || callingProcess->GetWrappedProcess()->GetProcessName() == "pi-Inelastic"))
  {
    return fBiasingOperation;
  }
  else {
    return 0;
  }
}

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