#include "DQMOffline/Trigger/interface/HLTTauDQMOfflineSource.h"

#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include "DataFormats/HLTReco/interface/TriggerEvent.h"

using namespace std;
using namespace edm;
using namespace reco;
using namespace trigger;

//
// constructors and destructor
//
HLTTauDQMOfflineSource::HLTTauDQMOfflineSource(const edm::ParameterSet& ps)
    : hltProcessName_(ps.getUntrackedParameter<std::string>("HLTProcessName", "HLT")),
      triggerResultsSrc_(ps.getUntrackedParameter<edm::InputTag>("TriggerResultsSrc")),
      triggerResultsToken_(consumes<edm::TriggerResults>(triggerResultsSrc_)),
      triggerEventSrc_(ps.getUntrackedParameter<edm::InputTag>("TriggerEventSrc")),
      triggerEventToken_(consumes<trigger::TriggerEvent>(triggerEventSrc_)),
      pathRegex_(ps.getUntrackedParameter<std::string>("Paths")),
      nPtBins_(ps.getUntrackedParameter<int>("PtHistoBins", 20)),
      nEtaBins_(ps.getUntrackedParameter<int>("EtaHistoBins", 12)),
      nPhiBins_(ps.getUntrackedParameter<int>("PhiHistoBins", 18)),
      ptMax_(ps.getUntrackedParameter<double>("PtHistoMax", 200)),
      highPtMax_(ps.getUntrackedParameter<double>("HighPtHistoMax", 1000)),
      l1MatchDr_(ps.getUntrackedParameter<double>("L1MatchDeltaR", 0.5)),
      hltMatchDr_(ps.getUntrackedParameter<double>("HLTMatchDeltaR", 0.5)),
      dqmBaseFolder_(ps.getUntrackedParameter<std::string>("DQMBaseFolder")),
      counterEvt_(0),
      prescaleEvt_(ps.getUntrackedParameter<int>("prescaleEvt", -1)) {
  edm::ParameterSet matching = ps.getParameter<edm::ParameterSet>("Matching");
  doRefAnalysis_ = matching.getUntrackedParameter<bool>("doMatching");

  iWrapper = new HistoWrapper(ps);

  if (ps.exists("L1Plotter") && !ps.exists("TagAndProbe")) {
    l1Plotter_ = std::make_unique<HLTTauDQML1Plotter>(ps.getUntrackedParameter<edm::ParameterSet>("L1Plotter"),
                                                      consumesCollector(),
                                                      nPhiBins_,
                                                      ptMax_,
                                                      highPtMax_,
                                                      doRefAnalysis_,
                                                      l1MatchDr_,
                                                      dqmBaseFolder_);
  }
  if (ps.exists("PathSummaryPlotter")) {
    pathSummaryPlotter_ = std::make_unique<HLTTauDQMPathSummaryPlotter>(
        ps.getUntrackedParameter<edm::ParameterSet>("PathSummaryPlotter"), doRefAnalysis_, dqmBaseFolder_, hltMatchDr_);
  }
  tagAndProbe_ = false;
  if (ps.exists("TagAndProbe")) {
    tagAndProbePaths = ps.getUntrackedParameter<std::vector<edm::ParameterSet> >("TagAndProbe");
    tagAndProbe_ = true;
  }

  if (doRefAnalysis_) {
    using VPSet = std::vector<edm::ParameterSet>;
    VPSet matchObjects = matching.getUntrackedParameter<VPSet>("matchFilters");
    for (const edm::ParameterSet& pset : matchObjects) {
      refObjects_.push_back(RefObject{pset.getUntrackedParameter<int>("matchObjectID"),
                                      consumes<LVColl>(pset.getUntrackedParameter<edm::InputTag>("FilterName"))});
    }
  }
}

HLTTauDQMOfflineSource::~HLTTauDQMOfflineSource() = default;

//--------------------------------------------------------
void HLTTauDQMOfflineSource::dqmBeginRun(const edm::Run& iRun, const edm::EventSetup& iSetup) {
  //Evaluate configuration for every new trigger menu
  bool hltMenuChanged = false;
  if (HLTCP_.init(iRun, iSetup, hltProcessName_, hltMenuChanged)) {
    LogDebug("HLTTauDQMOffline") << "dqmBeginRun(), hltMenuChanged " << hltMenuChanged;
    if (hltMenuChanged) {
      if (!tagAndProbe_) {
        // Find all paths to monitor
        std::vector<std::string> foundPaths;
        std::smatch what;
        LogDebug("HLTTauDQMOffline") << "Looking for paths with regex " << pathRegex_;
        const std::regex pathRegex(pathRegex_);
        for (const std::string& pathName : HLTCP_.triggerNames()) {
          if (std::regex_search(pathName, what, pathRegex)) {
            LogDebug("HLTTauDQMOffline") << "Found path " << pathName;
            foundPaths.emplace_back(pathName);
          }
        }
        std::sort(foundPaths.begin(), foundPaths.end());

        // Construct path plotters
        std::vector<const HLTTauDQMPath*> pathObjects;
        pathPlotters_.reserve(foundPaths.size());
        pathObjects.reserve(foundPaths.size());
        for (const std::string& pathName : foundPaths) {
          pathPlotters_.emplace_back(pathName,
                                     HLTCP_,
                                     doRefAnalysis_,
                                     dqmBaseFolder_,
                                     hltProcessName_,
                                     nPtBins_,
                                     nEtaBins_,
                                     nPhiBins_,
                                     ptMax_,
                                     highPtMax_,
                                     l1MatchDr_,
                                     hltMatchDr_);
          if (pathPlotters_.back().isValid()) {
            pathObjects.push_back(pathPlotters_.back().getPathObject());
          }
        }

        // Update paths to the summary plotter
        if (pathSummaryPlotter_) {
          pathSummaryPlotter_->setPathObjects(pathObjects);
        }
      } else {  // tag and probe
                // Find all paths to monitor
        std::vector<std::string> foundPaths;
        std::smatch what;

        for (const edm::ParameterSet& tpset : tagAndProbePaths) {
          std::vector<std::string> moduleLabels;
          edm::ParameterSet denpset = tpset.getParameter<edm::ParameterSet>("denominator");
          std::vector<std::string> denominators = denpset.getParameter<std::vector<std::string> >("hltPaths");
          std::vector<std::string> updatedDenominators;
          for (size_t i = 0; i < denominators.size(); ++i) {
            const std::regex denRegex_(denominators[i]);
            for (const std::string& pathName : HLTCP_.triggerNames()) {
              if (std::regex_search(pathName, what, denRegex_)) {
                updatedDenominators.push_back(pathName);
                moduleLabels = HLTCP_.moduleLabels(pathName);
              }
            }
          }
          denpset.addParameter<std::vector<std::string> >("hltPaths", updatedDenominators);

          edm::ParameterSet numpset = tpset.getParameter<edm::ParameterSet>("numerator");
          std::vector<std::string> numerators = numpset.getParameter<std::vector<std::string> >("hltPaths");

          const std::regex numRegex_(numerators[0]);
          for (const std::string& pathName : HLTCP_.triggerNames()) {
            if (std::regex_search(pathName, what, numRegex_)) {
              edm::ParameterSet new_tpset = tpset;
              new_tpset.addParameter<std::string>("name", pathName);
              std::vector<std::string> updatedHltPaths;
              updatedHltPaths.push_back(pathName);
              numpset.addParameter<std::vector<std::string> >("hltPaths", updatedHltPaths);
              new_tpset.addParameter<edm::ParameterSet>("numerator", numpset);
              new_tpset.addParameter<edm::ParameterSet>("denominator", denpset);

              tagandprobePlotters_.emplace_back(
                  new HLTTauDQMTagAndProbePlotter(new_tpset, moduleLabels, dqmBaseFolder_));
            }
          }
        }
      }
    }
  } else {
    edm::LogWarning("HLTTauDQMOffline") << "HLT config extraction failure with process name '" << hltProcessName_
                                        << "'";
  }
}

//--------------------------------------------------------
void HLTTauDQMOfflineSource::bookHistograms(DQMStore::IBooker& iBooker,
                                            const edm::Run& iRun,
                                            const EventSetup& iSetup) {
  if (l1Plotter_) {
    l1Plotter_->bookHistograms(*iWrapper, iBooker);
  }
  for (auto& pathPlotter : pathPlotters_) {
    pathPlotter.bookHistograms(*iWrapper, iBooker);
  }
  for (auto& tpPlotter : tagandprobePlotters_) {
    tpPlotter->bookHistograms(*iWrapper, iBooker, iRun, iSetup);
  }
  if (pathSummaryPlotter_) {
    pathSummaryPlotter_->bookHistograms(*iWrapper, iBooker);
  }
}

// ----------------------------------------------------------
void HLTTauDQMOfflineSource::analyze(const Event& iEvent, const EventSetup& iSetup) {
  //Apply the prescaler
  if (counterEvt_ > prescaleEvt_) {
    //Do Analysis here
    counterEvt_ = 0;

    edm::Handle<edm::TriggerResults> triggerResultsHandle;
    iEvent.getByToken(triggerResultsToken_, triggerResultsHandle);
    if (!triggerResultsHandle.isValid()) {
      edm::LogWarning("HLTTauDQMOffline") << "Unable to read edm::TriggerResults with label " << triggerResultsSrc_;
      return;
    }

    edm::Handle<trigger::TriggerEvent> triggerEventHandle;
    iEvent.getByToken(triggerEventToken_, triggerEventHandle);
    if (!triggerEventHandle.isValid()) {
      edm::LogWarning("HLTTauDQMOffline") << "Unable to read trigger::TriggerEvent with label " << triggerEventSrc_;
      return;
    }

    //Create match collections
    HLTTauDQMOfflineObjects refC;
    if (doRefAnalysis_) {
      for (RefObject& refObj : refObjects_) {
        edm::Handle<LVColl> collHandle;
        iEvent.getByToken(refObj.token, collHandle);
        if (!collHandle.isValid())
          continue;

        if (refObj.objID == 11) {
          refC.electrons.insert(refC.electrons.end(), collHandle->begin(), collHandle->end());
        } else if (refObj.objID == 13) {
          refC.muons.insert(refC.muons.end(), collHandle->begin(), collHandle->end());
        } else if (refObj.objID == 15) {
          refC.taus.insert(refC.taus.end(), collHandle->begin(), collHandle->end());
        } else if (refObj.objID == 0) {
          refC.met.insert(refC.met.end(), collHandle->begin(), collHandle->end());
        }
      }
    }

    //Path Plotters
    for (auto& pathPlotter : pathPlotters_) {
      if (pathPlotter.isValid())
        pathPlotter.analyze(*triggerResultsHandle, *triggerEventHandle, refC);
    }

    if (pathSummaryPlotter_ && pathSummaryPlotter_->isValid()) {
      pathSummaryPlotter_->analyze(*triggerResultsHandle, *triggerEventHandle, refC);
    }

    //L1 Plotter
    if (l1Plotter_ && l1Plotter_->isValid()) {
      l1Plotter_->analyze(iEvent, iSetup, refC);
    }

    //Tag and probe plotters
    for (auto& tpPlotter : tagandprobePlotters_) {
      if (tpPlotter->isValid())
        tpPlotter->analyze(iEvent, *triggerResultsHandle, *triggerEventHandle, refC);
    }

  } else {
    counterEvt_++;
  }
}

#include "FWCore/Framework/interface/MakerMacros.h"
DEFINE_FWK_MODULE(HLTTauDQMOfflineSource);