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

#include "Run.hh"

#include "DetectorConstruction.hh"
#include "PrimaryGeneratorAction.hh"

#include "G4EmCalculator.hh"
#include "G4SystemOfUnits.hh"
#include "G4UnitsTable.hh"

#include <iomanip>

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Run::Run(const DetectorConstruction* det) : fDetector(det) {}

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void Run::SetPrimary(const G4ParticleDefinition* particle, G4double energy)
{
  fParticle = particle;
  fEkin = energy;
}
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void Run::CountProcesses(const G4String& procName)
{
  std::map<G4String, G4int>::iterator it = fProcCounter.find(procName);
  if (it == fProcCounter.end()) {
    fProcCounter[procName] = 1;
  }
  else {
    fProcCounter[procName]++;
  }
}

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void Run::Merge(const G4Run* run)
{
  const Run* localRun = static_cast<const Run*>(run);

  // pass information about primary particle
  fParticle = localRun->fParticle;
  fEkin = localRun->fEkin;

  // accumulate sums
  //
  fNbOfTraks0 += localRun->fNbOfTraks0;
  fNbOfTraks1 += localRun->fNbOfTraks1;
  fNbOfSteps0 += localRun->fNbOfSteps0;
  fNbOfSteps1 += localRun->fNbOfSteps1;
  fEdep += localRun->fEdep;
  fEleak += localRun->fEleak;
  fNIEL += localRun->fNIEL;
  fTrueRange += localRun->fTrueRange;
  fTrueRange2 += localRun->fTrueRange2;
  fProjRange += localRun->fProjRange;
  fProjRange2 += localRun->fProjRange2;
  fTransvDev += localRun->fTransvDev;
  fTransvDev2 += localRun->fTransvDev2;

  // map: processes count
  std::map<G4String, G4int>::const_iterator it;
  for (it = localRun->fProcCounter.begin(); it != localRun->fProcCounter.end(); ++it) {
    G4String procName = it->first;
    G4int localCount = it->second;
    if (fProcCounter.find(procName) == fProcCounter.end()) {
      fProcCounter[procName] = localCount;
    }
    else {
      fProcCounter[procName] += localCount;
    }
  }

  G4Run::Merge(run);
}

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void Run::EndOfRun()
{
  G4int prec = 5, wid = prec + 2;
  G4int dfprec = G4cout.precision(prec);

  // run condition
  //
  G4String partName = fParticle->GetParticleName();
  const G4Material* material = fDetector->GetMaterial();
  G4double density = material->GetDensity();

  G4cout << "\n ======================== run summary ======================\n";
  G4cout << "\n The run is: " << numberOfEvent << " " << partName << " of "
         << G4BestUnit(fEkin, "Energy") << " through " << G4BestUnit(fDetector->GetSize(), "Length")
         << " of " << material->GetName() << " (density: " << G4BestUnit(density, "Volumic Mass")
         << ")" << G4endl;

  if (numberOfEvent == 0) {
    G4cout.precision(dfprec);
    return;
  }

  G4double dNbOfEvents = (G4double)numberOfEvent;
  G4cout << "\n Energy deposit:   " 
         << G4BestUnit(fEdep/dNbOfEvents,  "Energy") << G4endl;
  G4cout << " Energy leakage:   " 
         << G4BestUnit(fEleak/dNbOfEvents, "Energy") << G4endl;
  G4cout << " Edep + Eleak:     " 
         << G4BestUnit((fEdep+fEleak)/dNbOfEvents, "Energy") << G4endl;
  G4cout << " \n NIEL energy calculated: " 
         << G4BestUnit(fNIEL/dNbOfEvents,  "Energy") << G4endl;

  // nb of tracks and steps per event
  //
  G4cout << "\n Nb tracks/event"
         << "   neutral: " << std::setw(wid) << fNbOfTraks0 / dNbOfEvents
         << "   charged: " << std::setw(wid) << fNbOfTraks1 / dNbOfEvents << "\n Nb  steps/event"
         << "   neutral: " << std::setw(wid) << fNbOfSteps0 / dNbOfEvents
         << "   charged: " << std::setw(wid) << fNbOfSteps1 / dNbOfEvents << G4endl;

  // frequency of processes
  //
  G4cout << "\n Process calls frequency :" << G4endl;
  G4int index = 0;
  std::map<G4String, G4int>::iterator it;
  for (it = fProcCounter.begin(); it != fProcCounter.end(); it++) {
    G4String procName = it->first;
    G4int count = it->second;
    G4String space = " ";
    if (++index % 3 == 0) space = "\n";
    G4cout << " " << std::setw(20) << procName << "=" << std::setw(7) << count << space;
  }
  G4cout << G4endl;

  // compute true and projected ranges, and transverse dispersion
  //
  fTrueRange /= numberOfEvent;
  fTrueRange2 /= numberOfEvent;
  G4double trueRms = fTrueRange2 - fTrueRange * fTrueRange;
  if (trueRms > 0.)
    trueRms = std::sqrt(trueRms);
  else
    trueRms = 0.;

  fProjRange /= numberOfEvent;
  fProjRange2 /= numberOfEvent;
  G4double projRms = fProjRange2 - fProjRange * fProjRange;
  if (projRms > 0.)
    projRms = std::sqrt(projRms);
  else
    projRms = 0.;

  fTransvDev /= 2 * numberOfEvent;
  fTransvDev2 /= 2 * numberOfEvent;
  G4double trvsRms = fTransvDev2 - fTransvDev * fTransvDev;
  if (trvsRms > 0.)
    trvsRms = std::sqrt(trvsRms);
  else
    trvsRms = 0.;

  // compare true range with csda range from PhysicsTables
  //
  G4EmCalculator emCalculator;
  G4double rangeTable = 0.;
  if (fParticle->GetPDGCharge() != 0.)
    rangeTable = emCalculator.GetCSDARange(fEkin, fParticle, material);

  G4cout << "\n---------------------------------------------------------\n";
  G4cout << " Primary particle : ";
  G4cout << "\n true Range = " << G4BestUnit(fTrueRange, "Length")
         << "   rms = " << G4BestUnit(trueRms, "Length");

  G4cout << "\n proj Range = " << G4BestUnit(fProjRange, "Length")
         << "   rms = " << G4BestUnit(projRms, "Length");

  G4cout << "\n proj/true  = " << fProjRange / fTrueRange;

  G4cout << "\n transverse dispersion at end = " << G4BestUnit(trvsRms, "Length");

  G4cout << "\n      mass true Range from simulation = "
         << G4BestUnit(fTrueRange * density, "Mass/Surface")
         << "\n       from PhysicsTable (csda range) = "
         << G4BestUnit(rangeTable * density, "Mass/Surface");
  G4cout << "\n---------------------------------------------------------\n";
  G4cout << G4endl;

  // remove all contents in fProcCounter
  fProcCounter.clear();

  // restore default format
  G4cout.precision(dfprec);
}

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