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/// \file EventAction.cc
/// \brief Implementation of the B4c::EventAction class

#include "EventAction.hh"

#include "CalorHit.hh"

#include "G4AnalysisManager.hh"
#include "G4Event.hh"
#include "G4HCofThisEvent.hh"
#include "G4RunManager.hh"
#include "G4SDManager.hh"
#include "G4UnitsTable.hh"

#include <iomanip>

namespace B4c
{

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

CalorHitsCollection* EventAction::GetHitsCollection(G4int hcID, const G4Event* event) const
{
  auto hitsCollection = static_cast<CalorHitsCollection*>(event->GetHCofThisEvent()->GetHC(hcID));

  if (!hitsCollection) {
    G4ExceptionDescription msg;
    msg << "Cannot access hitsCollection ID " << hcID;
    G4Exception("EventAction::GetHitsCollection()", "MyCode0003", FatalException, msg);
  }

  return hitsCollection;
}

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

void EventAction::PrintEventStatistics(G4double absoEdep, G4double absoTrackLength,
                                       G4double gapEdep, G4double gapTrackLength) const
{
  // print event statistics
  G4cout << "   Absorber: total energy: " << std::setw(7) << G4BestUnit(absoEdep, "Energy")
         << "       total track length: " << std::setw(7) << G4BestUnit(absoTrackLength, "Length")
         << G4endl << "        Gap: total energy: " << std::setw(7) << G4BestUnit(gapEdep, "Energy")
         << "       total track length: " << std::setw(7) << G4BestUnit(gapTrackLength, "Length")
         << G4endl;
}

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

void EventAction::BeginOfEventAction(const G4Event* /*event*/) {}

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

void EventAction::EndOfEventAction(const G4Event* event)
{
  // Get hits collections IDs (only once)
  if (fAbsHCID == -1) {
    fAbsHCID = G4SDManager::GetSDMpointer()->GetCollectionID("AbsorberHitsCollection");
    fGapHCID = G4SDManager::GetSDMpointer()->GetCollectionID("GapHitsCollection");
  }

  // Get hits collections
  auto absoHC = GetHitsCollection(fAbsHCID, event);
  auto gapHC = GetHitsCollection(fGapHCID, event);

  // Get hit with total values
  auto absoHit = (*absoHC)[absoHC->entries() - 1];
  auto gapHit = (*gapHC)[gapHC->entries() - 1];

  // Print per event (modulo n)
  //
  auto eventID = event->GetEventID();
  auto printModulo = G4RunManager::GetRunManager()->GetPrintProgress();
  if ((printModulo > 0) && (eventID % printModulo == 0)) {
    PrintEventStatistics(absoHit->GetEdep(), absoHit->GetTrackLength(), gapHit->GetEdep(),
                         gapHit->GetTrackLength());
    G4cout << "--> End of event: " << eventID << "\n" << G4endl;
  }

  // Fill histograms, ntuple
  //

  // get analysis manager
  auto analysisManager = G4AnalysisManager::Instance();

  // fill histograms
  analysisManager->FillH1(0, absoHit->GetEdep());
  analysisManager->FillH1(1, gapHit->GetEdep());
  analysisManager->FillH1(2, absoHit->GetTrackLength());
  analysisManager->FillH1(3, gapHit->GetTrackLength());

  // fill ntuple
  analysisManager->FillNtupleDColumn(0, absoHit->GetEdep());
  analysisManager->FillNtupleDColumn(1, gapHit->GetEdep());
  analysisManager->FillNtupleDColumn(2, absoHit->GetTrackLength());
  analysisManager->FillNtupleDColumn(3, gapHit->GetTrackLength());
  analysisManager->AddNtupleRow();
}

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

}  // namespace B4c
