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/// \file electromagnetic/TestEm17/src/HistoManager.cc
/// \brief Implementation of the HistoManager class
//
//
// 
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#include "HistoManager.hh"
#include "HistoMessenger.hh"
#include "G4UnitsTable.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"

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HistoManager::HistoManager()
 : fHistoMessenger(0)
{
  fileName[0]  = "testem17";
  factoryOn = false;
  fNbHist   = 0;

  // histograms
  for (G4int k=0; k<kMaxHisto; k++) {
    fHistId[k] = 0;
    fHistPt[k] = 0;    
    fExist[k] = false;
    fUnit[k]  = 1.0;
    fWidth[k] = 1.0;
    fAscii[k] = false;    
  }

  fHistoMessenger = new HistoMessenger(this);
}

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HistoManager::~HistoManager()
{
  delete fHistoMessenger;
}

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void HistoManager::Book()
{
  // if no histos, do nothing
  if (fNbHist == 0) return;
  
  // Create or get analysis manager
  // The choice of analysis technology is done via selection of a namespace
  // in HistoManager.hh
  G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();
  analysisManager->SetDefaultFileType("root");
  analysisManager->SetVerboseLevel(0);
  G4String extension = analysisManager->GetFileType();
  fileName[1] = fileName[0] + "." + extension;
  
  // Open an output file
  //
  G4bool fileOpen = analysisManager->OpenFile(fileName[0]);
  if (!fileOpen) {
    G4cout << "\n---> HistoManager::book(): cannot open " << fileName[1] 
           << G4endl;
    return;
  }  

  // create selected histograms
  //
  analysisManager->SetFirstHistoId(1);
    
  for (G4int k=0; k<kMaxHisto; k++) {
    if (fExist[k]) {
      fHistId[k] = analysisManager->CreateH1( fLabel[k], fTitle[k],
                                              fNbins[k], fVmin[k], fVmax[k]);
      fHistPt[k] = analysisManager->GetH1(fHistId[k]);
      factoryOn = true;
    }
  }

  if (factoryOn)  
    G4cout << "\n----> Histogram file is opened in " << fileName[1] << G4endl;
}

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void HistoManager::Save()
{
  if (factoryOn) {
    G4cout << "\n----> HistoManager::save " << G4endl;
    G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();    
    analysisManager->Write();
    analysisManager->CloseFile();
    SaveAscii();                    // Write fAscii file, if any
    G4cout << "\n----> Histograms are saved in " << fileName[1] << G4endl;
      
    analysisManager->Clear();
    factoryOn = false;
  }         
}

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void HistoManager::FillHisto(G4int ih, G4double e, G4double weight)
{
  if (ih > kMaxHisto) {
    G4cout << "---> warning from HistoManager::FillHisto() : histo " << ih
           << "does not fExist; e= " << e << " w= " << weight << G4endl;
    return;
  }

  if (fHistPt[ih]) fHistPt[ih]->fill(e/fUnit[ih], weight);
}

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void HistoManager::SetHisto(G4int ih,
               G4int nbins, G4double vmin, G4double vmax, const G4String& unit)
{
  if (ih > kMaxHisto) {
    G4cout << "---> warning from HistoManager::SetHisto() : histo " << ih
           << "does not fExist" << G4endl;
    return;
  }
  
  const G4String id[] = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
                 "10", "11", "12", "13", "14", "15", "16", "17", "18", "19",
                 "20", "21", "22", "23", "24", "25", "26", "27", "28", "29"};
  const G4String title[] = { "dummy", // 0
                  "log10(Eloss/Emu) muIonization",              //1
                  "log10(Eloss/Emu) muPair",                    //2
                  "log10(Eloss/Emu) muBrems",                   //3
                  "log10(Eloss/Emu) muNuclear",                 //4
                  "log10(Eloss/Emu) hIonization",               //5
                  "log10(Eloss/Emu) hPair",                     //6
                  "log10(Eloss/Emu) hBrems",                    //7
                  "log10(Eloss/Emu) muToMuonPair",              //8
                  "dummy",                                      //9
                  "dummy",                                      //10
                  "log10(Eloss/Emu) muIonization",              //11
                  "log10(Eloss/Emu) muPair",                    //12
                  "log10(Eloss/Emu) muBrems",                   //13
                  "log10(Eloss/Emu) muNuclear",                 //14
                  "dummy",                                      //15
                  "dummy",                                      //16
                  "dummy",                                      //17
                  "log10(Eloss/Emu) muToMuonPair",              //18
                  "dummy",                                      //19
                  "dummy",                                      //20
                  "CS(1/mm) vs ekin muIonisation",              //21
                  "CS(1/mm) vs ekin muPair",                    //22
                  "CS(1/mm) vs ekin muBrems",                   //23
                  "CS(1/mm) vs ekin muNuclear",                 //24
                  "dummy",                                      //25
                  "dummy",                                      //26
                  "dummy",                                      //27
                  "CS(1/mm) vs ekin muToMuonPair",              //28
                  "dummy"                                       //29 
                 };

  G4String titl = title[ih];
  fUnit[ih] = 1.;

  if (unit != "none") {
    titl = title[ih] + " (" + unit + ")";
    fUnit[ih] = G4UnitDefinition::GetValueOf(unit);
  }

  fExist[ih] = true;
  fLabel[ih] = "h"+id[ih];
  fTitle[ih] = titl;
  fNbins[ih] = nbins;
  fVmin[ih]  = vmin;
  fVmax[ih]  = vmax;
  fWidth[ih] = fUnit[ih]*(vmax-vmin)/nbins;
  
  fNbHist++;

  G4cout << "----> SetHisto " << ih << ": " << titl << ";  "
         << nbins << " bins from "
         << vmin << " " << unit << " to " << vmax << " " << unit << G4endl;

}

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void HistoManager::Normalize(G4int ih, G4double fac)
{
  if (ih >= kMaxHisto) {
    G4cout << "---> warning from HistoManager::Normalize() : histo " << ih
           << "  fac= " << fac << G4endl;
    return;
  }

  if (fHistPt[ih]) fHistPt[ih]->scale(fac);
}

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void HistoManager::PrintHisto(G4int ih)
{
 if (ih < kMaxHisto) { fAscii[ih] = true; fAscii[0] = true; }
 else
    G4cout << "---> warning from HistoManager::PrintHisto() : histo " << ih
           << "does not exist" << G4endl;
}

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#include <fstream>

void HistoManager::SaveAscii()
{
 if (!fAscii[0]) return;
 
 G4String name = fileName[0] + ".ascii";
 std::ofstream File(name, std::ios::out);
 if (!File) {
   G4cout 
       << "\n---> HistoManager::saveAscii(): cannot open " << name << G4endl;
    return;
  }  

 File.setf( std::ios::scientific, std::ios::floatfield );
  
 //write selected histograms
 for (G4int ih=0; ih<kMaxHisto; ih++) {
    if (fHistPt[ih] && fAscii[ih]) {
          
      File << "\n  1D histogram " << ih << ": " << fTitle[ih] 
           << "\n \n \t     X \t\t     Y" << G4endl;
     
      for (G4int iBin=0; iBin<fNbins[ih]; iBin++) {
         File << "  " << iBin << "\t" 
              << fHistPt[ih]->axis().bin_center(iBin) << "\t"
              << fHistPt[ih]->bin_height(iBin) 
              << G4endl;
      } 
    }
 } 
}

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