//#include <algorithm>
#include "JetMETCorrections/Objects/interface/JetCorrectionsRecord.h"
#include "DataFormats/JetReco/interface/CaloJet.h"
#include "DataFormats/BTauReco/interface/JetTag.h"
#include "DataFormats/Common/interface/Handle.h"
#include "DQM/Physics/src/TopDiLeptonOfflineDQM.h"

#include <memory>

#include "DQM/Physics/interface/TopDQMHelpers.h"
#include "DataFormats/JetReco/interface/PFJet.h"
#include "FWCore/Framework/interface/ConsumesCollector.h"
#include "FWCore/Framework/interface/EDConsumerBase.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/Utilities/interface/EDGetToken.h"
#include "FWCore/Utilities/interface/InputTag.h"

namespace TopDiLeptonOffline {

  MonitorEnsemble::MonitorEnsemble(const char* label, const edm::ParameterSet& cfg, edm::ConsumesCollector&& iC)
      : label_(label),
        eidCutValue_(0.),
        elecIso_(nullptr),
        elecSelect_(nullptr),
        muonIso_(nullptr),
        muonSelect_(nullptr),
        jetIDSelect_(nullptr),
        lowerEdge_(-1.),
        upperEdge_(-1.),
        elecMuLogged_(0),
        diMuonLogged_(0),
        diElecLogged_(0) {
    // sources have to be given; this PSet is not optional
    edm::ParameterSet sources = cfg.getParameter<edm::ParameterSet>("sources");
    muons_ = iC.consumes<edm::View<reco::PFCandidate>>(sources.getParameter<edm::InputTag>("muons"));
    elecs_ = iC.consumes<edm::View<reco::PFCandidate>>(sources.getParameter<edm::InputTag>("elecs"));
    jets_ = iC.consumes<edm::View<reco::Jet>>(sources.getParameter<edm::InputTag>("jets"));
    for (edm::InputTag const& tag : sources.getParameter<std::vector<edm::InputTag>>("mets"))
      mets_.push_back(iC.consumes<edm::View<reco::MET>>(tag));

    // elecExtras are optional; they may be omitted or empty
    if (cfg.existsAs<edm::ParameterSet>("elecExtras")) {
      edm::ParameterSet elecExtras = cfg.getParameter<edm::ParameterSet>("elecExtras");
      // select is optional; in case it's not found no
      // selection will be applied
      if (elecExtras.existsAs<std::string>("select")) {
        elecSelect_ = std::make_unique<StringCutObjectSelector<reco::PFCandidate>>(
            elecExtras.getParameter<std::string>("select"));
      }
      // isolation is optional; in case it's not found no
      // isolation will be applied
      if (elecExtras.existsAs<std::string>("isolation")) {
        elecIso_ = std::make_unique<StringCutObjectSelector<reco::PFCandidate>>(
            elecExtras.getParameter<std::string>("isolation"));
      }
      // electronId is optional; in case it's not found the
      // InputTag will remain empty
      if (elecExtras.existsAs<edm::ParameterSet>("electronId")) {
        edm::ParameterSet elecId = elecExtras.getParameter<edm::ParameterSet>("electronId");
        electronId_ = iC.consumes<edm::ValueMap<float>>(elecId.getParameter<edm::InputTag>("src"));
        eidCutValue_ = elecId.getParameter<double>("cutValue");
        //	eidPattern_= elecId.getParameter<int>("pattern");
      }
    }
    // muonExtras are optional; they may be omitted or empty
    if (cfg.existsAs<edm::ParameterSet>("muonExtras")) {
      edm::ParameterSet muonExtras = cfg.getParameter<edm::ParameterSet>("muonExtras");
      // select is optional; in case it's not found no
      // selection will be applied
      if (muonExtras.existsAs<std::string>("select")) {
        muonSelect_ = std::make_unique<StringCutObjectSelector<reco::PFCandidate, true>>(
            muonExtras.getParameter<std::string>("select"));
      }
      // isolation is optional; in case it's not found no
      // isolation will be applied
      if (muonExtras.existsAs<std::string>("isolation")) {
        muonIso_ = std::make_unique<StringCutObjectSelector<reco::PFCandidate, true>>(
            muonExtras.getParameter<std::string>("isolation"));
      }
    }
    // jetExtras are optional; they may be omitted or empty
    if (cfg.existsAs<edm::ParameterSet>("jetExtras")) {
      edm::ParameterSet jetExtras = cfg.getParameter<edm::ParameterSet>("jetExtras");
      // jetCorrector is optional; in case it's not found
      // the InputTag will remain empty
      if (jetExtras.existsAs<std::string>("jetCorrector")) {
        jetCorrector_ =
            iC.consumes<reco::JetCorrector>(edm::InputTag(jetExtras.getParameter<std::string>("jetCorrector")));
      }
      // read jetID information if it exists
      if (jetExtras.existsAs<edm::ParameterSet>("jetID")) {
        edm::ParameterSet jetID = jetExtras.getParameter<edm::ParameterSet>("jetID");
        jetIDLabel_ = iC.consumes<reco::JetIDValueMap>(jetID.getParameter<edm::InputTag>("label"));
        jetIDSelect_ =
            std::make_unique<StringCutObjectSelector<reco::JetID>>(jetID.getParameter<std::string>("select"));
      }
      // select is optional; in case it's not found no
      // selection will be applied (only implemented for
      // CaloJets at the moment)
      if (jetExtras.existsAs<std::string>("select")) {
        jetSelect_ = jetExtras.getParameter<std::string>("select");
      }
    }
    // triggerExtras are optional; they may be omitted or empty
    if (cfg.existsAs<edm::ParameterSet>("triggerExtras")) {
      edm::ParameterSet triggerExtras = cfg.getParameter<edm::ParameterSet>("triggerExtras");
      triggerTable_ = iC.consumes<edm::TriggerResults>(triggerExtras.getParameter<edm::InputTag>("src"));
      elecMuPaths_ = triggerExtras.getParameter<std::vector<std::string>>("pathsELECMU");
      diMuonPaths_ = triggerExtras.getParameter<std::vector<std::string>>("pathsDIMUON");
    }
    // massExtras is optional; in case it's not found no mass
    // window cuts are applied for the same flavor monitor
    // histograms
    if (cfg.existsAs<edm::ParameterSet>("massExtras")) {
      edm::ParameterSet massExtras = cfg.getParameter<edm::ParameterSet>("massExtras");
      lowerEdge_ = massExtras.getParameter<double>("lowerEdge");
      upperEdge_ = massExtras.getParameter<double>("upperEdge");
    }

    // setup the verbosity level for booking histograms;
    // per default the verbosity level will be set to
    // STANDARD. This will also be the chosen level in
    // the case when the monitoring PSet is not found
    verbosity_ = STANDARD;
    if (cfg.existsAs<edm::ParameterSet>("monitoring")) {
      edm::ParameterSet monitoring = cfg.getParameter<edm::ParameterSet>("monitoring");
      if (monitoring.getParameter<std::string>("verbosity") == "DEBUG")
        verbosity_ = DEBUG;
      if (monitoring.getParameter<std::string>("verbosity") == "VERBOSE")
        verbosity_ = VERBOSE;
      if (monitoring.getParameter<std::string>("verbosity") == "STANDARD")
        verbosity_ = STANDARD;
    }
    // and don't forget to do the histogram booking
    directory_ = cfg.getParameter<std::string>("directory");
  }

  void MonitorEnsemble::book(DQMStore::IBooker& ibooker) {
    // set up the current directory path
    std::string current(directory_);
    current += label_;
    ibooker.setCurrentFolder(current);

    // determine number of bins for trigger monitoring
    unsigned int nElecMu = elecMuPaths_.size();
    unsigned int nDiMuon = diMuonPaths_.size();

    // --- [STANDARD] --- //
    // Run Number
    hists_["RunNumb_"] = ibooker.book1D("RunNumber", "Run Nr.", 1.e4, 1.5e5, 3.e5);
    // invariant mass of opposite charge lepton pair (only filled for same flavor)
    hists_["invMass_"] = ibooker.book1D("InvMass", "M(lep1, lep2)", 80, 0., 320.);
    // invariant mass of opposite charge lepton pair (only filled for same flavor)
    hists_["invMassLog_"] = ibooker.book1D("InvMassLog", "log_{10}(M(lep1, lep2))", 80, .1, 2.5);
    // invariant mass of same charge lepton pair (log10 for low mass region, only
    // filled for same flavor)
    hists_["invMassWC_"] = ibooker.book1D("InvMassWC", "M_{WC}(L1, L2)", 80, 0., 320.);
    // invariant mass of same charge lepton pair (log10 for low mass region, only
    // filled for same flavor)
    hists_["invMassWCLog_"] = ibooker.book1D("InvMassLogWC", "log_{10}(M_{WC})", 80, .1, 2.5);
    // decay channel [1]: muon/muon, [2]:elec/elec, [3]:elec/muon
    hists_["decayChannel_"] = ibooker.book1D("DecayChannel", "Decay Channel", 3, 0, 3);
    // trigger efficiency estimates for the electron muon channel
    hists_["elecMuEff_"] = ibooker.book1D("ElecMuEff", "Eff(e/#mu paths)", nElecMu, 0., nElecMu);
    // monitored trigger occupancy for the electron muon channel
    hists_["elecMuMon_"] = ibooker.book1D("ElecMuMon", "Mon(e/#mu paths)", nElecMu, 0., nElecMu);
    // trigger efficiency estimates for the di muon channel
    hists_["diMuonEff_"] = ibooker.book1D("DiMuonEff", "Eff(#mu/#mu paths)", nDiMuon, 0., nDiMuon);
    // monitored trigger occupancy for the di muon channel
    hists_["diMuonMon_"] = ibooker.book1D("DiMuonMon", "Mon(#mu/#mu paths)", nDiMuon, 0., nDiMuon);
    // pt of the leading lepton
    hists_["lep1Pt_"] = ibooker.book1D("Lep1Pt", "pt(lep1)", 50, 0., 200.);
    // pt of the 2. leading lepton
    hists_["lep2Pt_"] = ibooker.book1D("Lep2Pt", "pt(lep2)", 50, 0., 200.);
    // multiplicity of jets with pt>30 (corrected to L2+L3)
    hists_["jetMult_"] = ibooker.book1D("JetMult", "N_{30}(jet)", 21, -0.5, 20.5);
    // MET (calo)
    hists_["metCalo_"] = ibooker.book1D("METCalo", "MET_{Calo}", 50, 0., 200.);

    // set bin labels for trigger monitoring
    triggerBinLabels(std::string("elecMu"), elecMuPaths_);
    triggerBinLabels(std::string("diMuon"), diMuonPaths_);
    // set bin labels for decayChannel_
    hists_["decayChannel_"]->setBinLabel(1, "#mu e", 1);
    hists_["decayChannel_"]->setBinLabel(2, "#mu #mu", 1);
    hists_["decayChannel_"]->setBinLabel(3, "e e", 1);

    if (verbosity_ == STANDARD)
      return;

    // --- [VERBOSE] --- //
    // mean eta of the candidate leptons
    hists_["sumEtaL1L2_"] = ibooker.book1D("SumEtaL1L2", "<#eta>(lep1, lep2)", 100, -5., 5.);
    // deltaEta between the 2 candidate leptons
    hists_["dEtaL1L2_"] = ibooker.book1D("DEtaL1L2", "#Delta#eta(lep1,lep2)", 80, -4., 4.);
    // deltaPhi between the 2 candidate leptons
    hists_["dPhiL1L2_"] = ibooker.book1D("DPhiL1L2", "#Delta#phi(lep1,lep2)", 64, -3.2, 3.2);
    // pt of the candidate electron (depending on the decay channel)
    hists_["elecPt_"] = ibooker.book1D("ElecPt", "pt(e)", 50, 0., 200.);
    // relative isolation of the candidate electron (depending on the decay
    // channel)
    hists_["elecRelIso_"] = ibooker.book1D("ElecRelIso", "Iso_{Rel}(e)", 50, 0., 1.);
    // pt of the canddiate muon (depending on the decay channel)
    hists_["muonPt_"] = ibooker.book1D("MuonPt", "pt(#mu)", 50, 0., 200.);
    // relative isolation of the candidate muon (depending on the decay channel)
    hists_["muonRelIso_"] = ibooker.book1D("MuonRelIso", "Iso_{Rel}(#mu) (#Delta#beta Corrected)", 50, 0., 1.);
    // pt of the 1. leading jet (corrected to L2+L3)
    hists_["jet1Pt_"] = ibooker.book1D("Jet1Pt", "pt_{L2L3}(jet1)", 60, 0., 300.);
    // pt of the 2. leading jet (corrected to L2+L3)
    hists_["jet2Pt_"] = ibooker.book1D("Jet2Pt", "pt_{L2L3}(jet2)", 60, 0., 300.);
    // MET (PF)
    hists_["metPflow_"] = ibooker.book1D("METPflow", "MET_{Pflow}", 50, 0., 200.);
    // MET (TC)
    hists_["metTC_"] = ibooker.book1D("METTC", "MET_{TC}", 50, 0., 200.);
    // dz for muons (to suppress cosmis)
    hists_["muonDelZ_"] = ibooker.book1D("MuonDelZ", "d_{z}(#mu)", 50, -25., 25.);
    // dxy for muons (to suppress cosmics)
    hists_["muonDelXY_"] = ibooker.book2D("MuonDelXY", "d_{xy}(#mu)", 50, -1., 1., 50, -1., 1.);
    // lepton multiplicity after std isolation
    hists_["lepMultIso_"] = ibooker.book2D("LepMultIso", "N_{Iso}(e) vs N_{Iso}(#mu)", 5, 0., 5., 5, 0., 5.);

    // set axes titles for dxy for muons
    hists_["muonDelXY_"]->setAxisTitle("x [cm]", 1);
    hists_["muonDelXY_"]->setAxisTitle("y [cm]", 2);
    // set axes titles for lepton multiplicity after std isolation
    hists_["lepMultIso_"]->setAxisTitle("N_{Iso}(#mu)", 1);
    hists_["lepMultIso_"]->setAxisTitle("N_{Iso}(elec)", 2);

    if (verbosity_ == VERBOSE)
      return;

    // --- [DEBUG] --- //
    // electron multiplicity after std isolation
    hists_["elecMultIso_"] = ibooker.book1D("ElecMultIso", "N_{Iso}(e)", 11, -0.5, 10.5);
    // muon multiplicity after std isolation
    hists_["muonMultIso_"] = ibooker.book1D("MuonMultIso", "N_{Iso}(#mu)", 11, -0.5, 10.5);
    // charged hadron isolation component of the candidate muon (depending on the
    // decay channel)
    hists_["muonChHadIso_"] = ibooker.book1D("MuonChHadIsoComp", "ChHad_{IsoComponent}(#mu)", 50, 0., 5.);
    // neutral hadron isolation component of the candidate muon (depending on the
    // decay channel)
    hists_["muonNeHadIso_"] = ibooker.book1D("MuonNeHadIsoComp", "NeHad_{IsoComponent}(#mu)", 50, 0., 5.);
    // photon isolation component of the candidate muon (depending on the decay
    // channel)
    hists_["muonPhIso_"] = ibooker.book1D("MuonPhIsoComp", "Photon_{IsoComponent}(#mu)", 50, 0., 5.);
    // charged hadron isolation component of the candidate electron (depending on
    // the decay channel)
    hists_["elecChHadIso_"] = ibooker.book1D("ElectronChHadIsoComp", "ChHad_{IsoComponent}(e)", 50, 0., 5.);
    // neutral hadron isolation component of the candidate electron (depending on
    // the decay channel)
    hists_["elecNeHadIso_"] = ibooker.book1D("ElectronNeHadIsoComp", "NeHad_{IsoComponent}(e)", 50, 0., 5.);
    // photon isolation component of the candidate electron (depending on the
    // decay channel)
    hists_["elecPhIso_"] = ibooker.book1D("ElectronPhIsoComp", "Photon_{IsoComponent}(e)", 50, 0., 5.);
    // eta of the leading jet
    hists_["jet1Eta_"] = ibooker.book1D("Jet1Eta", "#eta(jet1)", 30, -5., 5.);
    // eta of the 2. leading jet
    hists_["jet2Eta_"] = ibooker.book1D("Jet2Eta", "#eta(jet2)", 30, -5., 5.);
    // pt of the 1. leading jet (not corrected)
    hists_["jet1PtRaw_"] = ibooker.book1D("Jet1PtRaw", "pt_{Raw}(jet1)", 60, 0., 300.);
    // pt of the 2. leading jet (not corrected)
    hists_["jet2PtRaw_"] = ibooker.book1D("Jet2PtRaw", "pt_{Raw}(jet2)", 60, 0., 300.);
    // deltaEta between the 2 leading jets
    hists_["dEtaJet1Jet2_"] = ibooker.book1D("DEtaJet1Jet2", "#Delta#eta(jet1,jet2)", 80, -4., 4.);
    // deltaEta between the lepton and the leading jet
    hists_["dEtaJet1Lep1_"] = ibooker.book1D("DEtaJet1Lep1", "#Delta#eta(jet1,lep1)", 80, -4., 4.);
    // deltaEta between the lepton and MET
    hists_["dEtaLep1MET_"] = ibooker.book1D("DEtaLep1MET", "#Delta#eta(lep1,MET)", 80, -4., 4.);
    // deltaEta between leading jet and MET
    hists_["dEtaJet1MET_"] = ibooker.book1D("DEtaJet1MET", "#Delta#eta(jet1,MET)", 80, -4., 4.);
    // deltaPhi of 2 leading jets
    hists_["dPhiJet1Jet2_"] = ibooker.book1D("DPhiJet1Jet2", "#Delta#phi(jet1,jet2)", 64, -3.2, 3.2);
    // deltaPhi of 1. lepton and 1. jet
    hists_["dPhiJet1Lep1_"] = ibooker.book1D("DPhiJet1Lep1", "#Delta#phi(jet1,lep1)", 64, -3.2, 3.2);
    // deltaPhi of 1. lepton and MET
    hists_["dPhiLep1MET_"] = ibooker.book1D("DPhiLep1MET", "#Delta#phi(lep1,MET)", 64, -3.2, 3.2);
    // deltaPhi of 1. jet and MET
    hists_["dPhiJet1MET_"] = ibooker.book1D("DPhiJet1MET", "#Delta#phi(jet1,MET)", 64, -3.2, 3.2);
    // selected dimuon events
    hists_["diMuonLogger_"] = ibooker.book2D("DiMuonLogger", "Logged DiMuon Events", 8, 0., 8., 10, 0., 10.);
    // selected dielec events
    hists_["diElecLogger_"] = ibooker.book2D("DiElecLogger", "Logged DiElec Events", 8, 0., 8., 10, 0., 10.);
    // selected elemu events
    hists_["elecMuLogger_"] = ibooker.book2D("ElecMuLogger", "Logged ElecMu Events", 8, 0., 8., 10, 0., 10.);

    // set bin labels for trigger monitoring
    loggerBinLabels(std::string("diMuonLogger_"));
    loggerBinLabels(std::string("diElecLogger_"));
    loggerBinLabels(std::string("elecMuLogger_"));
    return;
  }

  void MonitorEnsemble::fill(const edm::Event& event, const edm::EventSetup& setup) {
    // fetch trigger event if configured such
    edm::Handle<edm::TriggerResults> triggerTable;
    if (!triggerTable_.isUninitialized()) {
      if (!event.getByToken(triggerTable_, triggerTable))
        return;
    }
    /*
  ------------------------------------------------------------

  Run and Inst. Luminosity information (Inst. Lumi. filled now with a dummy
  value=5.0)

  ------------------------------------------------------------
  */

    if (!event.eventAuxiliary().run())
      return;
    fill("RunNumb_", event.eventAuxiliary().run());

    double dummy = 5.;
    fill("InstLumi_", dummy);

    /*
  ------------------------------------------------------------

  Muon Selection

  ------------------------------------------------------------
  */

    std::vector<const reco::PFCandidate*> isoMuons;

    edm::Handle<edm::View<reco::PFCandidate>> muons;
    edm::View<reco::PFCandidate>::const_iterator muonit;

    if (!event.getByToken(muons_, muons))
      return;

    for (edm::View<reco::PFCandidate>::const_iterator muonit = muons->begin(); muonit != muons->end(); ++muonit) {
      if (muonit->muonRef().isNull())
        continue;
      reco::MuonRef muon = muonit->muonRef();

      if (muon->innerTrack().isNull())
        continue;

      if (muon->isGlobalMuon()) {
        fill("muonDelZ_", muon->innerTrack()->vz());  // CB using inner track!
        fill("muonDelXY_", muon->innerTrack()->vx(), muon->innerTrack()->vy());

        // apply selection
        if (!muonSelect_ || (*muonSelect_)(*muonit)) {
          double chHadPt = muon->pfIsolationR04().sumChargedHadronPt;
          double neHadEt = muon->pfIsolationR04().sumNeutralHadronEt;
          double phoEt = muon->pfIsolationR04().sumPhotonEt;

          double pfRelIso = (chHadPt + std::max(0., neHadEt + phoEt - 0.5 * muon->pfIsolationR04().sumPUPt)) /
                            muon->pt();  // CB dBeta corrected iso!

          fill("muonRelIso_", pfRelIso);

          fill("muonChHadIso_", chHadPt);
          fill("muonNeHadIso_", neHadEt);
          fill("muonPhIso_", phoEt);

          if (!muonIso_ || (*muonIso_)(*muonit))
            isoMuons.push_back(&(*muonit));
        }
      }
    }

    fill("muonMultIso_", isoMuons.size());

    /*
  ------------------------------------------------------------

  Electron Selection

  ------------------------------------------------------------
  */

    // buffer isolated electronss
    std::vector<const reco::PFCandidate*> isoElecs;
    edm::Handle<edm::ValueMap<float>> electronId;
    if (!electronId_.isUninitialized()) {
      if (!event.getByToken(electronId_, electronId))
        return;
    }
    edm::Handle<edm::View<reco::PFCandidate>> elecs;
    if (!event.getByToken(elecs_, elecs))
      return;

    for (edm::View<reco::PFCandidate>::const_iterator elec = elecs->begin(); elec != elecs->end(); ++elec) {
      if (elec->gsfElectronRef().isNull()) {
        continue;
      }
      reco::GsfElectronRef gsf_el = elec->gsfElectronRef();
      // restrict to electrons with good electronId
      if (electronId_.isUninitialized() ? true : ((double)(*electronId)[gsf_el] >= eidCutValue_)) {
        // apply preselection
        if (!elecSelect_ || (*elecSelect_)(*elec)) {
          double el_ChHadIso = gsf_el->pfIsolationVariables().sumChargedHadronPt;
          double el_NeHadIso = gsf_el->pfIsolationVariables().sumNeutralHadronEt;
          double el_PhIso = gsf_el->pfIsolationVariables().sumPhotonEt;
          double el_pfRelIso =
              (el_ChHadIso + std::max(0., el_NeHadIso + el_PhIso - 0.5 * gsf_el->pfIsolationVariables().sumPUPt)) /
              gsf_el->pt();
          fill("elecRelIso_", el_pfRelIso);
          fill("elecChHadIso_", el_ChHadIso);
          fill("elecNeHadIso_", el_NeHadIso);
          fill("elecPhIso_", el_PhIso);
          if (!elecIso_ || (*elecIso_)(*elec))
            isoElecs.push_back(&(*elec));
        }
      }
    }
    fill("elecMultIso_", isoElecs.size());

    /*
  ------------------------------------------------------------

  Jet Selection

  ------------------------------------------------------------
  */

    const reco::JetCorrector* corrector = nullptr;
    if (!jetCorrector_.isUninitialized()) {
      // check whether a jet corrector is in the event or not
      edm::Handle<reco::JetCorrector> correctorHandle = event.getHandle(jetCorrector_);
      if (correctorHandle.isValid()) {
        corrector = correctorHandle.product();
      } else {
        edm::LogVerbatim("TopDiLeptonOfflineDQM") << "\n"
                                                  << "-----------------------------------------------------------------"
                                                     "-------------------- \n"
                                                  << " No JetCorrector available from Event:\n"
                                                  << "  - Jets will not be corrected.                                  "
                                                     "                     \n"
                                                  << "-----------------------------------------------------------------"
                                                     "-------------------- \n";
      }
    }

    unsigned int mult = 0;
    // buffer leadingJets
    std::vector<reco::Jet> leadingJets;
    edm::Handle<edm::View<reco::Jet>> jets;
    if (!event.getByToken(jets_, jets))
      return;

    edm::Handle<reco::JetIDValueMap> jetID;
    if (jetIDSelect_) {
      if (!event.getByToken(jetIDLabel_, jetID))
        return;
    }

    for (edm::View<reco::Jet>::const_iterator jet = jets->begin(); jet != jets->end(); ++jet) {
      unsigned int idx = jet - jets->begin();
      if (jetIDSelect_ && dynamic_cast<const reco::CaloJet*>(jets->refAt(idx).get())) {
        if (!(*jetIDSelect_)((*jetID)[jets->refAt(idx)]))
          continue;
      }
      // chekc additional jet selection for calo, pf and bare reco jets
      if (dynamic_cast<const reco::CaloJet*>(&*jet)) {
        reco::CaloJet sel = dynamic_cast<const reco::CaloJet&>(*jet);
        sel.scaleEnergy(corrector ? corrector->correction(*jet) : 1.);
        StringCutObjectSelector<reco::CaloJet> jetSelect(jetSelect_);
        if (!jetSelect(sel)) {
          continue;
        }
      } else if (dynamic_cast<const reco::PFJet*>(&*jet)) {
        reco::PFJet sel = dynamic_cast<const reco::PFJet&>(*jet);
        sel.scaleEnergy(corrector ? corrector->correction(*jet) : 1.);
        StringCutObjectSelector<reco::PFJet> jetSelect(jetSelect_);
        if (!jetSelect(sel))
          continue;
      } else {
        reco::Jet sel = *jet;
        sel.scaleEnergy(corrector ? corrector->correction(*jet) : 1.);
        StringCutObjectSelector<reco::Jet> jetSelect(jetSelect_);
        if (!jetSelect(sel))
          continue;
      }
      // check for overlaps
      bool overlap = false;
      for (std::vector<const reco::PFCandidate*>::const_iterator elec = isoElecs.begin(); elec != isoElecs.end();
           ++elec) {
        if (reco::deltaR((*elec)->eta(), (*elec)->phi(), jet->eta(), jet->phi()) < 0.4) {
          overlap = true;
          break;
        }
      }
      if (overlap) {
        continue;
      }
      // prepare jet to fill monitor histograms
      reco::Jet monitorJet = *jet;
      monitorJet.scaleEnergy(corrector ? corrector->correction(*jet) : 1.);
      ++mult;  // determine jet multiplicity
      if (idx == 0) {
        leadingJets.push_back(monitorJet);
        fill("jet1Pt_", monitorJet.pt());
        fill("jet1PtRaw_", jet->pt());
        fill("jet1Eta_", jet->eta());
      }
      if (idx == 1) {
        leadingJets.push_back(monitorJet);
        fill("jet2Pt_", monitorJet.pt());
        fill("jet2PtRaw_", jet->pt());
        fill("jet2Eta_", jet->eta());
      }
    }
    if (leadingJets.size() > 1) {
      fill("dEtaJet1Jet2_", leadingJets[0].eta() - leadingJets[1].eta());
      fill("dPhiJet1Jet2_", reco::deltaPhi(leadingJets[0].phi(), leadingJets[1].phi()));
      if (!isoMuons.empty()) {
        if (isoElecs.empty() || isoMuons[0]->pt() > isoElecs[0]->pt()) {
          fill("dEtaJet1Lep1_", isoMuons[0]->eta() - leadingJets[0].eta());
          fill("dPhiJet1Lep1_", reco::deltaPhi(isoMuons[0]->phi(), leadingJets[0].phi()));
        }
      }
      if (!isoElecs.empty()) {
        if (isoMuons.empty() || isoElecs[0]->pt() > isoMuons[0]->pt()) {
          fill("dEtaJet1Lep1_", isoElecs[0]->eta() - leadingJets[0].eta());
          fill("dPhiJet1Lep1_", reco::deltaPhi(isoElecs[0]->phi(), leadingJets[0].phi()));
        }
      }
    }
    fill("jetMult_", mult);

    /*
  ------------------------------------------------------------

  MET Selection

  ------------------------------------------------------------
  */

    // buffer for event logging
    reco::MET caloMET;
    for (std::vector<edm::EDGetTokenT<edm::View<reco::MET>>>::const_iterator met_ = mets_.begin(); met_ != mets_.end();
         ++met_) {
      edm::Handle<edm::View<reco::MET>> met;
      if (!event.getByToken(*met_, met))
        continue;

      if (met->begin() != met->end()) {
        unsigned int idx = met_ - mets_.begin();
        if (idx == 0) {
          caloMET = *met->begin();
          fill("metCalo_", met->begin()->et());
          if (!leadingJets.empty()) {
            fill("dEtaJet1MET_", leadingJets[0].eta() - met->begin()->eta());
            fill("dPhiJet1MET_", reco::deltaPhi(leadingJets[0].phi(), met->begin()->phi()));
          }
          if (!isoMuons.empty()) {
            if (isoElecs.empty() || isoMuons[0]->pt() > isoElecs[0]->pt()) {
              fill("dEtaLep1MET_", isoMuons[0]->eta() - met->begin()->eta());
              fill("dPhiLep1MET_", reco::deltaPhi(isoMuons[0]->phi(), met->begin()->phi()));
            }
          }
          if (!isoElecs.empty()) {
            if (isoMuons.empty() || isoElecs[0]->pt() > isoMuons[0]->pt()) {
              fill("dEtaLep1MET_", isoElecs[0]->eta() - met->begin()->eta());
              fill("dPhiLep1MET_", reco::deltaPhi(isoElecs[0]->phi(), met->begin()->phi()));
            }
          }
        }
        if (idx == 1) {
          fill("metTC_", met->begin()->et());
        }
        if (idx == 2) {
          fill("metPflow_", met->begin()->et());
        }
      }
    }

    /*
  ------------------------------------------------------------

  Event Monitoring

  ------------------------------------------------------------
  */

    // check number of isolated leptons
    fill("lepMultIso_", isoMuons.size(), isoElecs.size());
    // ELECMU channel
    if (decayChannel(isoMuons, isoElecs) == ELECMU) {
      fill("decayChannel_", 0.5);
      double mass = (isoElecs[0]->p4() + isoMuons[0]->p4()).mass();
      if ((lowerEdge_ == -1. && upperEdge_ == -1.) || (lowerEdge_ < mass && mass < upperEdge_)) {
        fill("dEtaL1L2_", isoElecs[0]->eta() - isoMuons[0]->eta());
        fill("sumEtaL1L2_", (isoElecs[0]->eta() + isoMuons[0]->eta()) / 2);
        fill("dPhiL1L2_", reco::deltaPhi(isoElecs[0]->phi(), isoMuons[0]->eta()));
        fill("elecPt_", isoElecs[0]->pt());
        fill("muonPt_", isoMuons[0]->pt());
        fill("lep1Pt_", isoElecs[0]->pt() > isoMuons[0]->pt() ? isoElecs[0]->pt() : isoMuons[0]->pt());
        fill("lep2Pt_", isoElecs[0]->pt() > isoMuons[0]->pt() ? isoMuons[0]->pt() : isoElecs[0]->pt());
        // fill plots for trigger monitoring
        if (!triggerTable_.isUninitialized())
          fill(event, *triggerTable, "elecMu", elecMuPaths_);
        if (elecMuLogged_ <= hists_.find("elecMuLogger_")->second->getNbinsY()) {
          // log runnumber, lumi block, event number & some
          // more pysics infomation for interesting events
          fill("elecMuLogger_", 0.5, elecMuLogged_ + 0.5, event.eventAuxiliary().run());
          fill("elecMuLogger_", 1.5, elecMuLogged_ + 0.5, event.eventAuxiliary().luminosityBlock());
          fill("elecMuLogger_", 2.5, elecMuLogged_ + 0.5, event.eventAuxiliary().event());
          fill("elecMuLogger_", 3.5, elecMuLogged_ + 0.5, isoMuons[0]->pt());
          fill("elecMuLogger_", 4.5, elecMuLogged_ + 0.5, isoElecs[0]->pt());
          if (!leadingJets.empty())
            fill("elecMuLogger_", 5.5, elecMuLogged_ + 0.5, leadingJets[0].pt());
          if (leadingJets.size() > 1)
            fill("elecMuLogger_", 6.5, elecMuLogged_ + 0.5, leadingJets[1].pt());
          fill("elecMuLogger_", 7.5, elecMuLogged_ + 0.5, caloMET.et());
          ++elecMuLogged_;
        }
      }
    }

    // DIMUON channel
    if (decayChannel(isoMuons, isoElecs) == DIMUON) {
      fill("decayChannel_", 1.5);
      int charge = isoMuons[0]->charge() * isoMuons[1]->charge();
      double mass = (isoMuons[0]->p4() + isoMuons[1]->p4()).mass();

      fill(charge < 0 ? "invMass_" : "invMassWC_", mass);
      fill(charge < 0 ? "invMassLog_" : "invMassWCLog_", log10(mass));
      if ((lowerEdge_ == -1. && upperEdge_ == -1.) || (lowerEdge_ < mass && mass < upperEdge_)) {
        fill("dEtaL1L2_", isoMuons[0]->eta() - isoMuons[1]->eta());
        fill("sumEtaL1L2_", (isoMuons[0]->eta() + isoMuons[1]->eta()) / 2);
        fill("dPhiL1L2_", reco::deltaPhi(isoMuons[0]->phi(), isoMuons[1]->phi()));
        fill("muonPt_", isoMuons[0]->pt());
        fill("muonPt_", isoMuons[1]->pt());
        fill("lep1Pt_", isoMuons[0]->pt());
        fill("lep2Pt_", isoMuons[1]->pt());
        // fill plots for trigger monitoring
        if (!triggerTable_.isUninitialized())
          fill(event, *triggerTable, "diMuon", diMuonPaths_);
        if (diMuonLogged_ <= hists_.find("diMuonLogger_")->second->getNbinsY()) {
          // log runnumber, lumi block, event number & some
          // more pysics infomation for interesting events
          fill("diMuonLogger_", 0.5, diMuonLogged_ + 0.5, event.eventAuxiliary().run());
          fill("diMuonLogger_", 1.5, diMuonLogged_ + 0.5, event.eventAuxiliary().luminosityBlock());
          fill("diMuonLogger_", 2.5, diMuonLogged_ + 0.5, event.eventAuxiliary().event());
          fill("diMuonLogger_", 3.5, diMuonLogged_ + 0.5, isoMuons[0]->pt());
          fill("diMuonLogger_", 4.5, diMuonLogged_ + 0.5, isoMuons[1]->pt());
          if (!leadingJets.empty())
            fill("diMuonLogger_", 5.5, diMuonLogged_ + 0.5, leadingJets[0].pt());
          if (leadingJets.size() > 1)
            fill("diMuonLogger_", 6.5, diMuonLogged_ + 0.5, leadingJets[1].pt());
          fill("diMuonLogger_", 7.5, diMuonLogged_ + 0.5, caloMET.et());
          ++diMuonLogged_;
        }
      }
    }

    // DIELEC channel
    if (decayChannel(isoMuons, isoElecs) == DIELEC) {
      fill("decayChannel_", 2.5);
      int charge = isoElecs[0]->charge() * isoElecs[1]->charge();
      double mass = (isoElecs[0]->p4() + isoElecs[1]->p4()).mass();
      fill(charge < 0 ? "invMass_" : "invMassWC_", mass);
      fill(charge < 0 ? "invMassLog_" : "invMassWCLog_", log10(mass));
      if ((lowerEdge_ == -1. && upperEdge_ == -1.) || (lowerEdge_ < mass && mass < upperEdge_)) {
        fill("dEtaL1L2_", isoElecs[0]->eta() - isoElecs[1]->eta());
        fill("sumEtaL1L2_", (isoElecs[0]->eta() + isoElecs[1]->eta()) / 2);
        fill("dPhiL1L2_", reco::deltaPhi(isoElecs[0]->phi(), isoElecs[1]->phi()));
        fill("elecPt_", isoElecs[0]->pt());
        fill("elecPt_", isoElecs[1]->pt());
        fill("lep1Pt_", isoElecs[0]->pt());
        fill("lep2Pt_", isoElecs[1]->pt());
        if (diElecLogged_ <= hists_.find("diElecLogger_")->second->getNbinsY()) {
          // log runnumber, lumi block, event number & some
          // more pysics infomation for interesting events
          fill("diElecLogger_", 0.5, diElecLogged_ + 0.5, event.eventAuxiliary().run());
          fill("diElecLogger_", 1.5, diElecLogged_ + 0.5, event.eventAuxiliary().luminosityBlock());
          fill("diElecLogger_", 2.5, diElecLogged_ + 0.5, event.eventAuxiliary().event());
          fill("diElecLogger_", 3.5, diElecLogged_ + 0.5, isoElecs[0]->pt());
          fill("diElecLogger_", 4.5, diElecLogged_ + 0.5, isoElecs[1]->pt());
          if (!leadingJets.empty())
            fill("diElecLogger_", 5.5, diElecLogged_ + 0.5, leadingJets[0].pt());
          if (leadingJets.size() > 1)
            fill("diElecLogger_", 6.5, diElecLogged_ + 0.5, leadingJets[1].pt());
          fill("diElecLogger_", 7.5, diElecLogged_ + 0.5, caloMET.et());
          ++diElecLogged_;
        }
      }
    }
  }
}  // namespace TopDiLeptonOffline

TopDiLeptonOfflineDQM::TopDiLeptonOfflineDQM(const edm::ParameterSet& cfg)
    : vertexSelect_(nullptr),
      beamspotSelect_(nullptr),
      MuonStep(nullptr),
      ElectronStep(nullptr),
      PvStep(nullptr),
      METStep(nullptr) {
  JetSteps.clear();
  CaloJetSteps.clear();
  PFJetSteps.clear();
  // configure the preselection
  edm::ParameterSet presel = cfg.getParameter<edm::ParameterSet>("preselection");
  if (presel.existsAs<edm::ParameterSet>("trigger")) {
    edm::ParameterSet trigger = presel.getParameter<edm::ParameterSet>("trigger");
    //    triggerTable_=trigger.getParameter<edm::InputTag>("src");
    triggerTable_ = consumes<edm::TriggerResults>(trigger.getParameter<edm::InputTag>("src"));
    triggerPaths_ = trigger.getParameter<std::vector<std::string>>("select");
  }
  if (presel.existsAs<edm::ParameterSet>("vertex")) {
    edm::ParameterSet vertex = presel.getParameter<edm::ParameterSet>("vertex");
    vertex_ = consumes<std::vector<reco::Vertex>>(vertex.getParameter<edm::InputTag>("src"));
    vertexSelect_ = std::make_unique<StringCutObjectSelector<reco::Vertex>>(vertex.getParameter<std::string>("select"));
  }
  if (presel.existsAs<edm::ParameterSet>("beamspot")) {
    edm::ParameterSet beamspot = presel.getParameter<edm::ParameterSet>("beamspot");
    beamspot_ = consumes<reco::BeamSpot>(beamspot.getParameter<edm::InputTag>("src"));
    beamspotSelect_ =
        std::make_unique<StringCutObjectSelector<reco::BeamSpot>>(beamspot.getParameter<std::string>("select"));
  }

  // conifgure the selection
  sel_ = cfg.getParameter<std::vector<edm::ParameterSet>>("selection");
  setup_ = cfg.getParameter<edm::ParameterSet>("setup");
  for (unsigned int i = 0; i < sel_.size(); ++i) {
    selectionOrder_.push_back(sel_.at(i).getParameter<std::string>("label"));
    selection_[selectionStep(selectionOrder_.back())] =
        std::make_pair(sel_.at(i),
                       std::make_unique<TopDiLeptonOffline::MonitorEnsemble>(
                           selectionStep(selectionOrder_.back()).c_str(), setup_, consumesCollector()));
  }
  for (std::vector<std::string>::const_iterator selIt = selectionOrder_.begin(); selIt != selectionOrder_.end();
       ++selIt) {
    std::string key = selectionStep(*selIt), type = objectType(*selIt);
    if (selection_.find(key) != selection_.end()) {
      if (type == "muons") {
        MuonStep = std::make_unique<SelectionStep<reco::PFCandidate>>(selection_[key].first, consumesCollector());
      }
      if (type == "elecs") {
        ElectronStep = std::make_unique<SelectionStep<reco::PFCandidate>>(selection_[key].first, consumesCollector());
      }
      if (type == "pvs") {
        PvStep = std::make_unique<SelectionStep<reco::Vertex>>(selection_[key].first, consumesCollector());
      }
      if (type == "jets") {
        JetSteps.push_back(std::make_unique<SelectionStep<reco::Jet>>(selection_[key].first, consumesCollector()));
      }
      if (type == "jets/pf") {
        PFJetSteps.push_back(std::make_unique<SelectionStep<reco::PFJet>>(selection_[key].first, consumesCollector()));
      }
      if (type == "jets/calo") {
        CaloJetSteps.push_back(
            std::make_unique<SelectionStep<reco::CaloJet>>(selection_[key].first, consumesCollector()));
      }
      if (type == "met") {
        METStep = std::make_unique<SelectionStep<reco::MET>>(selection_[key].first, consumesCollector());
      }
    }
  }
}

void TopDiLeptonOfflineDQM::bookHistograms(DQMStore::IBooker& ibooker, edm::Run const&, edm::EventSetup const&) {
  for (auto selIt = selection_.begin(); selIt != selection_.end(); ++selIt) {
    selIt->second.second->book(ibooker);
  }
}
void TopDiLeptonOfflineDQM::analyze(const edm::Event& event, const edm::EventSetup& setup) {
  if (!triggerTable_.isUninitialized()) {
    edm::Handle<edm::TriggerResults> triggerTable;
    if (!event.getByToken(triggerTable_, triggerTable))
      return;
    if (!accept(event, *triggerTable, triggerPaths_))
      return;
  }
  if (!vertex_.isUninitialized()) {
    edm::Handle<std::vector<reco::Vertex>> vertex;
    if (!event.getByToken(vertex_, vertex))
      return;
    if (vertex->empty() || !(*vertexSelect_)(vertex->front()))
      return;
  }
  if (!beamspot_.isUninitialized()) {
    edm::Handle<reco::BeamSpot> beamspot;
    if (!event.getByToken(beamspot_, beamspot))
      return;
    if (!(*beamspotSelect_)(*beamspot))
      return;
  }
  unsigned int nJetSteps = -1;

  unsigned int nPFJetSteps = -1;

  unsigned int nCaloJetSteps = -1;
  // apply selection steps
  for (std::vector<std::string>::const_iterator selIt = selectionOrder_.begin(); selIt != selectionOrder_.end();
       ++selIt) {
    std::string key = selectionStep(*selIt), type = objectType(*selIt);
    if (selection_.find(key) != selection_.end()) {
      if (type == "empty") {
        selection_[key].second->fill(event, setup);
      }
      if (type == "muons" && MuonStep != nullptr) {
        if (MuonStep->select(event)) {
          selection_[key].second->fill(event, setup);
        } else
          break;
      }
      if (type == "elecs" && ElectronStep != nullptr) {
        if (ElectronStep->select(event, "electron")) {
          selection_[key].second->fill(event, setup);
        } else
          break;
      }
      if (type == "jets" && !JetSteps.empty()) {
        nJetSteps++;
        if (JetSteps[nJetSteps] != nullptr) {
          if (JetSteps[nJetSteps]->select(event, setup)) {
            selection_[key].second->fill(event, setup);
          } else
            break;
        }
      }

      if (type == "jets/pf" && !PFJetSteps.empty()) {
        nPFJetSteps++;
        if (PFJetSteps[nPFJetSteps] != nullptr) {
          if (PFJetSteps[nPFJetSteps]->select(event, setup)) {
            selection_[key].second->fill(event, setup);
          } else
            break;
        }
      }

      if (type == "jets/calo" && !CaloJetSteps.empty()) {
        nCaloJetSteps++;
        if (CaloJetSteps[nCaloJetSteps] != nullptr) {
          if (CaloJetSteps[nCaloJetSteps]->select(event, setup)) {
            selection_[key].second->fill(event, setup);
          } else
            break;
        }
      }

      if (type == "met" && METStep != nullptr) {
        if (METStep->select(event)) {
          selection_[key].second->fill(event, setup);
        } else
          break;
      }
    }
  }
}