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

#include "RunAction.hh"

#include "DetectorConstruction.hh"
#include "PhysicsList.hh"
#include "PrimaryGeneratorAction.hh"
#include "StepMax.hh"

#include "G4Run.hh"
#include "G4RunManager.hh"
#include "G4SystemOfUnits.hh"
#include "G4UnitsTable.hh"
#include "G4ios.hh"
#include "Randomize.hh"

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RunAction::RunAction(DetectorConstruction* det, PhysicsList* phys, PrimaryGeneratorAction* kin)
  : G4UserRunAction(),
    fAnalysisManager(0),
    fDetector(det),
    fPhysics(phys),
    fKinematic(kin),
    fTallyEdep(new G4double[kMaxTally]),
    fProjRange(0.),
    fProjRange2(0.),
    fEdeptot(0.),
    fEniel(0.),
    fNbPrimarySteps(0),
    fRange(0)
{
  // Book predefined histograms
  BookHisto();
}

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RunAction::~RunAction()
{
  delete[] fTallyEdep;
}

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void RunAction::BeginOfRunAction(const G4Run* aRun)
{
  G4cout << "### Run " << aRun->GetRunID() << " start." << G4endl;

  if (!fAnalysisManager) {
    BookHisto();
  }

  CLHEP::HepRandom::showEngineStatus();

  // initialize projected range, tallies, Ebeam, and book histograms
  //
  fNbPrimarySteps = 0;
  fRange = 0;
  fProjRange = fProjRange2 = 0.;
  fEdeptot = fEniel = 0.;
  for (G4int j = 0; j < kMaxTally; ++j) {
    fTallyEdep[j] = 0.;
  }
  fKinematic->ResetEbeamCumul();

  if (fAnalysisManager->IsActive()) {
    fAnalysisManager->OpenFile();

    // histogram "1" is defined by the length of the target
    // zoomed histograms are defined by UI command
    G4double length = fDetector->GetAbsorSizeX();
    G4double stepMax = fPhysics->GetStepMaxProcess()->GetMaxStep();
    G4int nbBins = 100;
    if (stepMax < DBL_MAX) {
      G4int nb = (G4int)(0.5 + length / stepMax);
      nbBins = std::min(std::max(nbBins, nb), 10000);
    }
    fAnalysisManager->SetH1(1, nbBins, 0., length, "mm");
  }
}

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void RunAction::EndOfRunAction(const G4Run* aRun)
{
  G4int nbofEvents = aRun->GetNumberOfEvent();
  if (nbofEvents == 0) return;

  // run conditions
  //
  const G4Material* material = fDetector->GetAbsorMaterial();
  G4double density = material->GetDensity();

  G4String particle = fKinematic->GetParticleGun()->GetParticleDefinition()->GetParticleName();
  G4double energy = fKinematic->GetParticleGun()->GetParticleEnergy();
  G4cout << "\n The run consists of " << nbofEvents << " " << particle << " of "
         << G4BestUnit(energy, "Energy") << " through "
         << G4BestUnit(fDetector->GetAbsorSizeX(), "Length") << " of " << material->GetName()
         << " (density: " << G4BestUnit(density, "Volumic Mass") << ")" << G4endl;

  // compute projected range and straggling
  //
  if (fRange > 0) {
    fProjRange /= fRange;
    fProjRange2 /= fRange;
  }
  G4double rms = fProjRange2 - fProjRange * fProjRange;
  if (rms > 0.)
    rms = std::sqrt(rms);
  else
    rms = 0.;

  G4double nstep = G4double(fNbPrimarySteps) / G4double(nbofEvents);

  G4cout.precision(6);
  G4cout << "\n Projected Range= " << G4BestUnit(fProjRange, "Length")
         << "   rms= " << G4BestUnit(rms, "Length") << G4endl;
  G4cout << " Mean number of primary steps = " << nstep << G4endl;

  // compute energy deposition and niel
  //
  fEdeptot /= nbofEvents;
  G4cout << " Total energy deposit= " << G4BestUnit(fEdeptot, "Energy") << G4endl;
  fEniel /= nbofEvents;
  G4cout << " niel energy deposit = " << G4BestUnit(fEniel, "Energy") << G4endl;

  // print dose in tallies
  //
  G4int tallyNumber = fDetector->GetTallyNumber();
  if (tallyNumber > 0) {
    G4double Ebeam = fKinematic->GetEbeamCumul();
    G4cout << "\n---------------------------------------------------------\n";
    G4cout << " Cumulated Doses : \tEdep      \tEdep/Ebeam \tDose" << G4endl;
    for (G4int j = 0; j < tallyNumber; ++j) {
      G4double Edep = fTallyEdep[j], ratio = 100 * Edep / Ebeam;
      G4double tallyMass = fDetector->GetTallyMass(j);
      G4double Dose = Edep / tallyMass;
      G4cout << " tally " << j << ": \t \t" << G4BestUnit(Edep, "Energy") << "\t" << ratio
             << " % \t" << G4BestUnit(Dose, "Dose") << G4endl;
    }
    G4cout << "\n---------------------------------------------------------\n";
    G4cout << G4endl;
  }

  if (fAnalysisManager->IsActive()) {
    // normalize histograms
    //
    for (G4int j = 1; j < 3; ++j) {
      G4double binWidth = fAnalysisManager->GetH1Width(j);
      G4double fac = (mm / MeV) / (nbofEvents * binWidth);
      fAnalysisManager->ScaleH1(j, fac);
    }
    fAnalysisManager->ScaleH1(3, 1. / nbofEvents);

    // save histograms
    fAnalysisManager->Write();
    fAnalysisManager->CloseFile();
  }

  // show Rndm status
  //
  CLHEP::HepRandom::showEngineStatus();
}

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void RunAction::BookHisto()
{
  // Create or get analysis manager
  fAnalysisManager = G4AnalysisManager::Instance();
  fAnalysisManager->SetDefaultFileType("root");
  fAnalysisManager->SetFileName("testem7");
  fAnalysisManager->SetVerboseLevel(1);
  fAnalysisManager->SetActivation(true);  // enable inactivation of histograms

  // Define histograms start values
  const G4int kMaxHisto = 4;
  const G4String id[] = {"h0", "h1", "h2", "h3"};
  const G4String title[] = {
    "dummy",  // 0
    "Edep (MeV/mm) along absorber ",  // 1
    "Edep (MeV/mm) along absorber zoomed",  // 2
    "projectile range"  // 3
  };

  // Default values (to be reset via /analysis/h1/set command)
  G4int nbins = 100;
  G4double vmin = 0.;
  G4double vmax = 100.;

  // Create all histograms as inactivated
  // as we have not yet set nbins, vmin, vmax
  for (G4int k = 0; k < kMaxHisto; ++k) {
    G4int ih = fAnalysisManager->CreateH1(id[k], title[k], nbins, vmin, vmax);
    G4bool activ = false;
    if (k == 1) activ = true;
    fAnalysisManager->SetH1Activation(ih, activ);
  }
}

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