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/// \file Par02FastSimModelEMCal.cc
/// \brief Implementation of the Par02FastSimModelEMCal class

#include "Par02FastSimModelEMCal.hh"
#include "Par02EventInformation.hh"
#include "Par02PrimaryParticleInformation.hh"
#include "Par02Smearer.hh"
#include "Par02Output.hh"

#include "G4Track.hh"
#include "G4Event.hh"
#include "G4RunManager.hh"
#include "G4AnalysisManager.hh"

#include "Randomize.hh"
#include "G4SystemOfUnits.hh"

#include "G4Electron.hh"
#include "G4Positron.hh"
#include "G4Gamma.hh"

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Par02FastSimModelEMCal::Par02FastSimModelEMCal( G4String aModelName, 
  G4Region* aEnvelope, Par02DetectorParametrisation::Parametrisation aType ) :
  G4VFastSimulationModel( aModelName, aEnvelope ), fCalculateParametrisation(),
  fParametrisation( aType ) {}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

Par02FastSimModelEMCal::Par02FastSimModelEMCal( G4String aModelName, 
                                                G4Region* aEnvelope ) : 
  G4VFastSimulationModel( aModelName, aEnvelope ), fCalculateParametrisation(),
  fParametrisation( Par02DetectorParametrisation::eCMS ) {}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

Par02FastSimModelEMCal::Par02FastSimModelEMCal( G4String aModelName ) :
  G4VFastSimulationModel( aModelName ), fCalculateParametrisation(), 
  fParametrisation( Par02DetectorParametrisation::eCMS ) {}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

Par02FastSimModelEMCal::~Par02FastSimModelEMCal() = default;

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

G4bool Par02FastSimModelEMCal::IsApplicable( 
  const G4ParticleDefinition& aParticleType ) {
  // Applicable for electrons, positrons, and gammas
  return &aParticleType == G4Electron::Definition()  ||
         &aParticleType == G4Positron::Definition()  ||
         &aParticleType == G4Gamma::Definition();
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

G4bool Par02FastSimModelEMCal::ModelTrigger( const G4FastTrack& /*aFastTrack*/ ) {
  return true;  // No kinematical restrictions to apply the parametrisation
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

void Par02FastSimModelEMCal::DoIt( const G4FastTrack& aFastTrack,
                                   G4FastStep& aFastStep ) {
  //G4cout << " ________EMCal model triggered _________" << G4endl;

  // Kill the parameterised particle at the entrance of the electromagnetic calorimeter
  aFastStep.KillPrimaryTrack();
  aFastStep.ProposePrimaryTrackPathLength( 0.0 );
  G4double Edep = aFastTrack.GetPrimaryTrack()->GetKineticEnergy();

  // Consider only primary tracks (do nothing else for secondary e-, e+, gammas)
  G4ThreeVector Pos = aFastTrack.GetPrimaryTrack()->GetPosition();
  if ( ! aFastTrack.GetPrimaryTrack()->GetParentID() ) {
    auto  info = (Par02EventInformation*) 
                            G4EventManager::GetEventManager()->GetUserInformation();
    if ( info->GetDoSmearing() ) {
      // Smearing according to the electromagnetic calorimeter resolution
      G4ThreeVector Porg = aFastTrack.GetPrimaryTrack()->GetMomentum();
      G4double res = fCalculateParametrisation->GetResolution( 
        Par02DetectorParametrisation::eEMCAL, fParametrisation, Porg.mag() );
      G4double eff = fCalculateParametrisation->GetEfficiency( 
        Par02DetectorParametrisation::eEMCAL, fParametrisation, Porg.mag() );
      G4double Esm;
      Esm = std::abs( Par02Smearer::Instance()->
                        SmearEnergy( aFastTrack.GetPrimaryTrack(), res ) );
      Par02Output::Instance()->FillHistogram( 1, (Esm/MeV) / (Edep/MeV) );
      // Setting the values of Pos, Esm, res and eff
      ( (Par02PrimaryParticleInformation*) ( const_cast< G4PrimaryParticle* >
          ( aFastTrack.GetPrimaryTrack()->GetDynamicParticle()->GetPrimaryParticle() )->
            GetUserInformation() ) )->SetEMCalPosition( Pos );
      ( (Par02PrimaryParticleInformation*) ( const_cast< G4PrimaryParticle* >
          ( aFastTrack.GetPrimaryTrack()->GetDynamicParticle()->GetPrimaryParticle() )->
            GetUserInformation() ) )->SetEMCalEnergy( Esm );
      ( (Par02PrimaryParticleInformation*) ( const_cast< G4PrimaryParticle* >
          ( aFastTrack.GetPrimaryTrack()->GetDynamicParticle()->GetPrimaryParticle() )->
            GetUserInformation() ) )->SetEMCalResolution( res );
      ( (Par02PrimaryParticleInformation*) ( const_cast< G4PrimaryParticle* >
          ( aFastTrack.GetPrimaryTrack()->GetDynamicParticle()->GetPrimaryParticle() )->
            GetUserInformation() ) )->SetEMCalEfficiency( eff );
      // The (smeared) energy of the particle is deposited in the step
      // (which corresponds to the entrance of the electromagnetic calorimeter)
      aFastStep.ProposeTotalEnergyDeposited( Esm );
    } else {
      // No smearing: simply setting the value of Edep
      ( (Par02PrimaryParticleInformation*) ( const_cast< G4PrimaryParticle* >
          ( aFastTrack.GetPrimaryTrack()->GetDynamicParticle()->GetPrimaryParticle() )->
            GetUserInformation() ) )->SetEMCalEnergy( Edep );
      // The (initial) energy of the particle is deposited in the step
      // (which corresponds to the entrance of the electromagnetic calorimeter)
      aFastStep.ProposeTotalEnergyDeposited( Edep );
    }
  }
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

