
#include "FWCore/Framework/interface/ConsumesCollector.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "CommonTools/UtilAlgos/interface/ObjectSelector.h"

//the selectores used to select the tracks
#include "Alignment/CommonAlignmentProducer/interface/AlignmentTrackSelector.h"
#include "Alignment/CommonAlignmentProducer/interface/AlignmentGlobalTrackSelector.h"
#include "Alignment/CommonAlignmentProducer/interface/AlignmentTwoBodyDecayTrackSelector.h"

#include "DataFormats/TrackReco/interface/TrackFwd.h"

// the following include is necessary to clone all track branches
// including recoTrackExtras and TrackingRecHitsOwned (in future also "owned clusters"?).
// if you remove it the code will compile, but the cloned
// tracks have only the recoTracks branch!
#include "CommonTools/RecoAlgos/interface/TrackSelector.h"

struct TrackConfigSelector {
  typedef std::vector<const reco::Track*> container;
  typedef container::const_iterator const_iterator;
  typedef reco::TrackCollection collection;

  TrackConfigSelector(const edm::ParameterSet& cfg, edm::ConsumesCollector&& iC)
      : theBaseSelector(cfg, iC),
        theGlobalSelector(cfg.getParameter<edm::ParameterSet>("GlobalSelector"), iC),
        theTwoBodyDecaySelector(cfg.getParameter<edm::ParameterSet>("TwoBodyDecaySelector"), iC) {
    //TODO Wrap the BaseSelector into its own PSet
    theBaseSwitch = theBaseSelector.useThisFilter();

    theGlobalSwitch = theGlobalSelector.useThisFilter();

    theTwoBodyDecaySwitch = theTwoBodyDecaySelector.useThisFilter();
  }

  const_iterator begin() const { return theSelectedTracks.begin(); }
  const_iterator end() const { return theSelectedTracks.end(); }
  size_t size() const { return theSelectedTracks.size(); }

  void select(const edm::Handle<reco::TrackCollection>& c, const edm::Event& evt, const edm::EventSetup& eSetup) {
    theSelectedTracks.clear();
    for (reco::TrackCollection::const_iterator i = c.product()->begin(); i != c.product()->end(); ++i) {
      theSelectedTracks.push_back(&*i);
    }
    // might add EvetSetup to the select(...) method of the Selectors
    if (theBaseSwitch)
      theSelectedTracks = theBaseSelector.select(theSelectedTracks, evt, eSetup);
    if (theGlobalSwitch)
      theSelectedTracks = theGlobalSelector.select(theSelectedTracks, evt, eSetup);
    if (theTwoBodyDecaySwitch)
      theSelectedTracks = theTwoBodyDecaySelector.select(theSelectedTracks, evt, eSetup);
  }

private:
  container theSelectedTracks;

  bool theBaseSwitch, theGlobalSwitch, theTwoBodyDecaySwitch;
  AlignmentTrackSelector theBaseSelector;
  AlignmentGlobalTrackSelector theGlobalSelector;
  AlignmentTwoBodyDecayTrackSelector theTwoBodyDecaySelector;
};

typedef ObjectSelector<TrackConfigSelector> AlignmentTrackSelectorModule;

DEFINE_FWK_MODULE(AlignmentTrackSelectorModule);
