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#include "DPGAnalysis/SiStripTools/interface/DigiVtxPosCorrHistogramMaker.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Utilities/interface/InputTag.h"
#include "DataFormats/Common/interface/Handle.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 "TH2F.h"
#include "TProfile.h"

#include "SimDataFormats/GeneratorProducts/interface/GenEventInfoProduct.h"
#include "DPGAnalysis/SiStripTools/interface/SiStripTKNumbers.h"

DigiVtxPosCorrHistogramMaker::DigiVtxPosCorrHistogramMaker(edm::ConsumesCollector&& iC)
    : m_mcvtxcollectionToken(iC.consumes<edm::HepMCProduct>(edm::InputTag("generatorSmeared"))),
      m_hitname(),
      m_nbins(500),
      m_scalefact(),
      m_binmax(),
      m_labels(),
      m_nmultvsvtxpos(),
      m_nmultvsvtxposprof(),
      m_subdirs() {}

DigiVtxPosCorrHistogramMaker::DigiVtxPosCorrHistogramMaker(const edm::ParameterSet& iConfig,
                                                           edm::ConsumesCollector&& iC)
    : m_mcvtxcollectionToken(iC.consumes<edm::HepMCProduct>(iConfig.getParameter<edm::InputTag>("mcVtxCollection"))),
      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_nmultvsvtxpos(),
      m_nmultvsvtxposprof(),
      m_subdirs() {
  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");
  }
}

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

void DigiVtxPosCorrHistogramMaker::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%sdigivsvtxpos", slab.c_str());
      sprintf(title, "%s %s multiplicity vx MC vertex z position", slab.c_str(), m_hitname.c_str());
      m_nmultvsvtxpos[i] = m_subdirs[i]->make<TH2F>(
          name, title, 200, -20., 20., m_nbins, 0., m_binmax[i] / (m_scalefact * m_nbins) * m_nbins);
      m_nmultvsvtxpos[i]->GetXaxis()->SetTitle("MC vertex z position (cm)");
      m_nmultvsvtxpos[i]->GetYaxis()->SetTitle("Number of Hits");
      sprintf(name, "n%sdigivsvtxposprof", slab.c_str());
      m_nmultvsvtxposprof[i] = m_subdirs[i]->make<TProfile>(name, title, 200, -20., 20.);
      m_nmultvsvtxposprof[i]->GetXaxis()->SetTitle("MC vertex z position (cm)");
      m_nmultvsvtxposprof[i]->GetYaxis()->SetTitle("Number of Hits");
    }
  }
}

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

void DigiVtxPosCorrHistogramMaker::fill(const edm::Event& iEvent, const std::map<unsigned int, int>& ndigi) {
  // main interaction part

  edm::Handle<edm::HepMCProduct> EvtHandle;
  iEvent.getByToken(m_mcvtxcollectionToken, EvtHandle);

  if (EvtHandle.isValid()) {
    const HepMC::GenEvent* Evt = EvtHandle->GetEvent();

    // get the first vertex

    if (Evt->vertices_begin() != Evt->vertices_end()) {
      double vtxz = (*Evt->vertices_begin())->point3d().z() / 10.;

      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_nmultvsvtxpos[i]->Fill(vtxz, digi->second);
          m_nmultvsvtxposprof[i]->Fill(vtxz, digi->second);
        }
      }
    }
  }
}