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//
#ifdef USE_INFERENCE
#include "Par04MLFastSimModel.hh"
#include <stddef.h>                      // for size_t
#include <G4FastStep.hh>                 // for G4FastStep
#include <G4FastTrack.hh>                // for G4FastTrack
#include <G4Track.hh>                    // for G4Track
#include <G4VFastSimulationModel.hh>     // for G4VFastSimulationModel
#include "G4Electron.hh"                 // for G4Electron
#include "G4FastHit.hh"                  // for G4FastHit
#include "G4FastSimHitMaker.hh"          // for G4FastSimHitMaker
#include "G4Gamma.hh"                    // for G4Gamma
#include "G4Positron.hh"                 // for G4Positron
#include "Par04InferenceSetup.hh"        // for Par04InferenceSetup
class G4ParticleDefinition;
class G4Region;

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

Par04MLFastSimModel::Par04MLFastSimModel(G4String aModelName, G4Region* aEnvelope)
  : G4VFastSimulationModel(aModelName, aEnvelope)
  , fInference(new Par04InferenceSetup)
  , fHitMaker(new G4FastSimHitMaker)
  , fParallelHitMaker(new G4FastSimHitMaker) {
  fParallelHitMaker->SetNameOfWorldWithSD("parallelWorldFastSim");
}

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

Par04MLFastSimModel::Par04MLFastSimModel(G4String aModelName)
  : G4VFastSimulationModel(aModelName)
  , fInference(new Par04InferenceSetup)
  , fHitMaker(new G4FastSimHitMaker)
  , fParallelHitMaker(new G4FastSimHitMaker) {
  fParallelHitMaker->SetNameOfWorldWithSD("parallelWorldFastSim");
}

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

Par04MLFastSimModel::~Par04MLFastSimModel() {}

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

G4bool Par04MLFastSimModel::IsApplicable(const G4ParticleDefinition& aParticleType)
{
  return &aParticleType == G4Electron::ElectronDefinition() ||
         &aParticleType == G4Positron::PositronDefinition() ||
         &aParticleType == G4Gamma::GammaDefinition();
}

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

G4bool Par04MLFastSimModel::ModelTrigger(const G4FastTrack& aFastTrack)
{
  return fInference->IfTrigger(aFastTrack.GetPrimaryTrack()->GetKineticEnergy());
}

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

void Par04MLFastSimModel::DoIt(const G4FastTrack& aFastTrack, G4FastStep& aFastStep)
{
  // remove particle from further processing by G4
  aFastStep.KillPrimaryTrack();
  aFastStep.SetPrimaryTrackPathLength(0.0);
  G4double energy = aFastTrack.GetPrimaryTrack()->GetKineticEnergy();
  aFastStep.SetTotalEnergyDeposited(energy);
  G4ThreeVector position  = aFastTrack.GetPrimaryTrack()->GetPosition();
  G4ThreeVector direction = aFastTrack.GetPrimaryTrack()->GetMomentumDirection();

  // calculate the incident angle
  G4float angle = direction.theta();

  // calculate how to deposit energy within the detector
  // get it from inference model
  fInference->GetEnergies(fEnergies, energy, angle);
  fInference->GetPositions(fPositions, position, direction);

  // deposit energy in the detector using calculated values of energy deposits
  // and positions
  for(size_t iHit = 0; iHit < fPositions.size(); iHit++)
  {
    if (fEnergies[iHit] > 0.0005) {
      // Place hit in the physical readout of the detector
      fParallelHitMaker->make(G4FastHit(fPositions[iHit], fEnergies[iHit]), aFastTrack);
      // Place hit in the virtual grid, for validation purposes
      fHitMaker->make(G4FastHit(fPositions[iHit], fEnergies[iHit]), aFastTrack);
    }
  }
}
#endif
