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

#include "TrackingAction.hh"

#include "EventAction.hh"
#include "HistoManager.hh"
#include "Run.hh"

#include "G4IonTable.hh"
#include "G4ParticleTypes.hh"
#include "G4RunManager.hh"
#include "G4StepStatus.hh"
#include "G4SystemOfUnits.hh"
#include "G4Track.hh"
#include "G4UnitsTable.hh"

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TrackingAction::TrackingAction(EventAction* event) : fEventAction(event) {}

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void TrackingAction::PreUserTrackingAction(const G4Track* track)
{
  Run* run = static_cast<Run*>(G4RunManager::GetRunManager()->GetNonConstCurrentRun());

  G4ParticleDefinition* particle = track->GetDefinition();
  G4String name = particle->GetParticleName();
  G4double meanLife = particle->GetPDGLifeTime();
  G4double ekin = track->GetKineticEnergy();
  fTimeBirth = track->GetGlobalTime();

  // count secondary particles (with meanLife > 0)
  if ((track->GetTrackID() > 1) && (meanLife != 0.)) run->ParticleCount(name, ekin, meanLife);
}

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void TrackingAction::PostUserTrackingAction(const G4Track* track)
{
  Run* run = static_cast<Run*>(G4RunManager::GetRunManager()->GetNonConstCurrentRun());

  G4AnalysisManager* analysis = G4AnalysisManager::Instance();

  const G4ParticleDefinition* particle = track->GetParticleDefinition();
  G4String name = particle->GetParticleName();
  G4double meanLife = particle->GetPDGLifeTime();
  G4double ekin = track->GetKineticEnergy();
  fTimeEnd = track->GetGlobalTime();
  if ((particle->GetPDGStable()) && (ekin == 0.)) fTimeEnd = DBL_MAX;

  // count population of ions with meanLife > 0.
  if ((G4IonTable::IsIon(particle)) && (meanLife != 0.)) {
    G4int id = run->GetIonId(name);
    G4double unit = analysis->GetH1Unit(id);
    G4double tmin = analysis->GetH1Xmin(id) * unit;
    G4double tmax = analysis->GetH1Xmax(id) * unit;
    G4double binWidth = analysis->GetH1Width(id) * unit;
    G4double weight = track->GetWeight();

    G4double t1 = std::max(fTimeBirth, tmin);
    G4double t2 = std::min(fTimeEnd, tmax);
    for (G4double time = t1; time < t2; time += binWidth)
      analysis->FillH1(id, time, weight);
  }

  // keep only emerging particles
  G4StepStatus status = track->GetStep()->GetPostStepPoint()->GetStepStatus();
  if (status != fWorldBoundary) return;

  fEventAction->AddEflow(ekin);
  run->ParticleFlux(name, ekin);

  // histograms: energy flow and activities of emerging particles

  G4int ih1 = 0, ih2 = 0;
  G4String type = particle->GetParticleType();
  G4double charge = particle->GetPDGCharge();
  G4double time = track->GetGlobalTime();
  G4double weight = track->GetWeight();
  if (charge > 3.) {
    ih1 = 10;
    ih2 = 20;
  }
  else if (particle == G4Gamma::Gamma()) {
    ih1 = 4;
    ih2 = 14;
  }
  else if (particle == G4Electron::Electron()) {
    ih1 = 5;
    ih2 = 15;
  }
  else if (particle == G4Positron::Positron()) {
    ih1 = 5;
    ih2 = 15;
  }
  else if (particle == G4Neutron::Neutron()) {
    ih1 = 6;
    ih2 = 16;
  }
  else if (particle == G4Proton::Proton()) {
    ih1 = 7;
    ih2 = 17;
  }
  else if (particle == G4Deuteron::Deuteron()) {
    ih1 = 8;
    ih2 = 18;
  }
  else if (particle == G4Alpha::Alpha()) {
    ih1 = 9;
    ih2 = 19;
  }
  else if (type == "nucleus") {
    ih1 = 10;
    ih2 = 20;
  }
  else if (type == "baryon") {
    ih1 = 11;
    ih2 = 21;
  }
  else if (type == "meson") {
    ih1 = 12;
    ih2 = 22;
  }
  else if (type == "lepton") {
    ih1 = 13;
    ih2 = 23;
  };
  if (ih1 > 0) analysis->FillH1(ih1, ekin, weight);
  if (ih2 > 0) analysis->FillH1(ih2, time, weight);
}

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