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#include "DPGAnalysis/SiStripTools/interface/DigiPileupCorrHistogramMaker.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/LuminosityBlock.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/ServiceRegistry/interface/Service.h"
#include "CommonTools/UtilAlgos/interface/TFileService.h"
#include "DataFormats/Luminosity/interface/LumiDetails.h"
#include "TH2F.h"
#include "TProfile.h"
#include "TProfile2D.h"

#include "DPGAnalysis/SiStripTools/interface/SiStripTKNumbers.h"

DigiPileupCorrHistogramMaker::DigiPileupCorrHistogramMaker(edm::ConsumesCollector&& iC)
    : m_pileupcollectionToken(iC.consumes<std::vector<PileupSummaryInfo> >(edm::InputTag("addPileupInfo"))),
      m_useVisibleVertices(false),
      m_hitname(),
      m_nbins(500),
      m_scalefact(),
      m_binmax(),
      m_labels(),
      m_nmultvsmclumi(),
      m_nmultvsmclumiprof(),
      m_nmultvsmcnvtx(),
      m_nmultvsmcnvtxprof(),
      m_nmultvsmcnvtxprof2d(),
      m_subdirs(),
      m_2dhisto(),
      m_ootBX(-1) {}

DigiPileupCorrHistogramMaker::DigiPileupCorrHistogramMaker(const edm::ParameterSet& iConfig,
                                                           edm::ConsumesCollector&& iC)
    : m_pileupcollectionToken(
          iC.consumes<std::vector<PileupSummaryInfo> >(iConfig.getParameter<edm::InputTag>("pileupSummaryCollection"))),
      m_useVisibleVertices(iConfig.getParameter<bool>("useVisibleVertices")),
      m_hitname(iConfig.getUntrackedParameter<std::string>("hitName", "digi")),
      m_nbins(iConfig.getUntrackedParameter<int>("numberOfBins", 500)),
      m_scalefact(iConfig.getUntrackedParameter<int>("scaleFactor", 5)),
      m_labels(),
      m_nmultvsmclumi(),
      m_nmultvsmclumiprof(),
      m_nmultvsmcnvtx(),
      m_nmultvsmcnvtxprof(),
      m_nmultvsmcnvtxprof2d(),
      m_subdirs(),
      m_2dhisto(iConfig.getUntrackedParameter<bool>("wanted2DHisto", false)),
      m_ootBX(iConfig.getUntrackedParameter<int>("ootBX", -1)) {
  std::vector<edm::ParameterSet> wantedsubds(iConfig.getUntrackedParameter<std::vector<edm::ParameterSet> >(
      "wantedSubDets", std::vector<edm::ParameterSet>()));

  for (std::vector<edm::ParameterSet>::iterator ps = wantedsubds.begin(); ps != wantedsubds.end(); ++ps) {
    m_labels[ps->getParameter<unsigned int>("detSelection")] = ps->getParameter<std::string>("detLabel");
    m_binmax[ps->getParameter<unsigned int>("detSelection")] = ps->getParameter<int>("binMax");
  }
}

DigiPileupCorrHistogramMaker::~DigiPileupCorrHistogramMaker() {
  for (std::map<unsigned int, std::string>::const_iterator lab = m_labels.begin(); lab != m_labels.end(); lab++) {
    const unsigned int i = lab->first;
    const std::string slab = lab->second;

    delete m_subdirs[i];
  }
}

void DigiPileupCorrHistogramMaker::book(const std::string dirname, const std::map<unsigned int, std::string>& labels) {
  m_labels = labels;
  book(dirname);
}

void DigiPileupCorrHistogramMaker::book(const std::string dirname) {
  edm::Service<TFileService> tfserv;
  TFileDirectory subev = tfserv->mkdir(dirname);

  SiStripTKNumbers trnumb;

  edm::LogInfo("NumberOfBins") << "Number of Bins: " << m_nbins;
  edm::LogInfo("ScaleFactors") << "y-axis range scale factor: " << m_scalefact;
  edm::LogInfo("BinMaxValue") << "Setting bin max values";

  for (std::map<unsigned int, std::string>::const_iterator lab = m_labels.begin(); lab != m_labels.end(); lab++) {
    const unsigned int i = lab->first;
    const std::string slab = lab->second;

    if (m_binmax.find(i) == m_binmax.end()) {
      edm::LogVerbatim("NotConfiguredBinMax")
          << "Bin max for " << lab->second << " not configured: " << trnumb.nstrips(i) << " used";
      m_binmax[i] = trnumb.nstrips(i);
    }

    edm::LogVerbatim("BinMaxValue") << "Bin max for " << lab->second << " is " << m_binmax[i];
  }

  for (std::map<unsigned int, std::string>::const_iterator lab = m_labels.begin(); lab != m_labels.end(); ++lab) {
    const int i = lab->first;
    const std::string slab = lab->second;

    char name[200];
    char title[500];

    m_subdirs[i] = new TFileDirectory(subev.mkdir(slab));

    if (m_subdirs[i]) {
      sprintf(name, "n%sdigivsmclumi", slab.c_str());
      sprintf(title, "%s %s multiplicity ave pileup interactions", slab.c_str(), m_hitname.c_str());
      m_nmultvsmclumi[i] = m_subdirs[i]->make<TH2F>(
          name, title, 200, 0., 50., m_nbins, 0., m_binmax[i] / (m_scalefact * m_nbins) * m_nbins);
      m_nmultvsmclumi[i]->GetXaxis()->SetTitle("Average Pileup Interactions");
      m_nmultvsmclumi[i]->GetYaxis()->SetTitle("Number of Hits");
      sprintf(name, "n%sdigivsmclumiprof", slab.c_str());
      m_nmultvsmclumiprof[i] = m_subdirs[i]->make<TProfile>(name, title, 200, 0., 50.);
      m_nmultvsmclumiprof[i]->GetXaxis()->SetTitle("Average Pileup Interactions");
      m_nmultvsmclumiprof[i]->GetYaxis()->SetTitle("Number of Hits");

      sprintf(name, "n%sdigivsmcnvtx", slab.c_str());
      sprintf(title, "%s %s multiplicity vs pileup interactions", slab.c_str(), m_hitname.c_str());
      m_nmultvsmcnvtx[i] = m_subdirs[i]->make<TH2F>(
          name, title, 60, -0.5, 59.5, m_nbins, 0., m_binmax[i] / (m_scalefact * m_nbins) * m_nbins);
      m_nmultvsmcnvtx[i]->GetXaxis()->SetTitle("Pileup Interactions");
      m_nmultvsmcnvtx[i]->GetYaxis()->SetTitle("Number of Hits");
      sprintf(name, "n%sdigivsmcnvtxprof", slab.c_str());
      m_nmultvsmcnvtxprof[i] = m_subdirs[i]->make<TProfile>(name, title, 60, -0.5, 59.5);
      m_nmultvsmcnvtxprof[i]->GetXaxis()->SetTitle("Pileup Interactions");
      m_nmultvsmcnvtxprof[i]->GetYaxis()->SetTitle("Number of Hits");
      if (m_2dhisto) {
        sprintf(name, "n%sdigivsmcnvtxprof2d", slab.c_str());
        m_nmultvsmcnvtxprof2d[i] = m_subdirs[i]->make<TProfile2D>(name, title, 60, -0.5, 59.5, 60, -0.5, 59.5);
        m_nmultvsmcnvtxprof2d[i]->GetXaxis()->SetTitle("Pileup Interactions");
        m_nmultvsmcnvtxprof2d[i]->GetYaxis()->SetTitle("Pileup Interactions OOT");
        m_nmultvsmcnvtxprof2d[i]->GetZaxis()->SetTitle("Number of Hits");
      }
    }
  }
}

void DigiPileupCorrHistogramMaker::beginRun(const unsigned int nrun) {}

void DigiPileupCorrHistogramMaker::fill(const edm::Event& iEvent, const std::map<unsigned int, int>& ndigi) {
  edm::Handle<std::vector<PileupSummaryInfo> > pileupinfos;
  iEvent.getByToken(m_pileupcollectionToken, pileupinfos);

  // look for the intime PileupSummaryInfo

  std::vector<PileupSummaryInfo>::const_iterator pileupinfoInTime = pileupinfos->end();
  std::vector<PileupSummaryInfo>::const_iterator pileupinfoMinusOne = pileupinfos->end();

  for (std::vector<PileupSummaryInfo>::const_iterator pileupinfo = pileupinfos->begin();
       pileupinfo != pileupinfos->end();
       ++pileupinfo) {
    if (pileupinfo->getBunchCrossing() == 0)
      pileupinfoInTime = pileupinfo;
    if (pileupinfo->getBunchCrossing() == m_ootBX)
      pileupinfoMinusOne = pileupinfo;
  }

  if (pileupinfoInTime == pileupinfos->end()) {
    edm::LogError("NoInTimePileUpInfo") << "Cannot find the in-time pileup info ";

  } else {
    int npileup = pileupinfoInTime->getPU_NumInteractions();

    if (m_useVisibleVertices)
      npileup = pileupinfoInTime->getPU_zpositions().size();

    for (std::map<unsigned int, int>::const_iterator digi = ndigi.begin(); digi != ndigi.end(); digi++) {
      if (m_labels.find(digi->first) != m_labels.end()) {
        const unsigned int i = digi->first;
        m_nmultvsmcnvtx[i]->Fill(npileup, digi->second);
        m_nmultvsmcnvtxprof[i]->Fill(npileup, digi->second);
        m_nmultvsmclumi[i]->Fill(pileupinfoInTime->getTrueNumInteractions(), digi->second);
        m_nmultvsmclumiprof[i]->Fill(pileupinfoInTime->getTrueNumInteractions(), digi->second);
        if (m_2dhisto) {
          if (pileupinfoMinusOne != pileupinfos->end()) {
            int npileupminusone = pileupinfoMinusOne->getPU_NumInteractions();
            if (m_useVisibleVertices)
              npileupminusone = pileupinfoMinusOne->getPU_zpositions().size();
            m_nmultvsmcnvtxprof2d[i]->Fill(npileup, npileupminusone, digi->second);
          }
        }
      }
    }
  }
}