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#ifndef MuonReco_MuonSelectors_h
#define MuonReco_MuonSelectors_h
//
// Package:    MuonReco
// 
//
// Original Author:  Jake Ribnik, Dmytro Kovalskyi
// $Id: MuonSelectors.h,v 1.13 2010/06/28 08:06:37 dmytro Exp $

#include "DataFormats/MuonReco/interface/Muon.h"
#include "TMath.h"
#include <string>

namespace muon {
   enum SelectionType {
      All = 0,                      // dummy options - always true
      AllGlobalMuons = 1,           // checks isGlobalMuon flag
      AllStandAloneMuons = 2,       // checks isStandAloneMuon flag
      AllTrackerMuons = 3,          // checks isTrackerMuon flag
      TrackerMuonArbitrated = 4,    // resolve ambiguity of sharing segments
      AllArbitrated = 5,            // all muons with the tracker muon arbitrated
      GlobalMuonPromptTight = 6,    // global muons with tighter fit requirements
      TMLastStationLoose = 7,       // penetration depth loose selector
      TMLastStationTight = 8,       // penetration depth tight selector
      TM2DCompatibilityLoose = 9,   // likelihood based loose selector
      TM2DCompatibilityTight = 10,  // likelihood based tight selector
      TMOneStationLoose = 11,       // require one well matched segment
      TMOneStationTight = 12,       // require one well matched segment
      TMLastStationOptimizedLowPtLoose = 13, // combination of TMLastStation and TMOneStation
      TMLastStationOptimizedLowPtTight = 14, // combination of TMLastStation and TMOneStation
      GMTkChiCompatibility = 15,    // require tk stub have good chi2 relative to glb track
      GMStaChiCompatibility = 16,   // require sta stub have good chi2 compatibility relative to glb track
      GMTkKinkTight = 17,           // require a small kink value in the tracker stub
      TMLastStationAngLoose = 18,   // TMLastStationLoose with additional angular cuts
      TMLastStationAngTight = 19,   // TMLastStationTight with additional angular cuts
      TMOneStationAngLoose = 20,    // TMOneStationLoose with additional angular cuts
      TMOneStationAngTight = 21,    // TMOneStationTight with additional angular cuts
      // The two algorithms that follow are identical to what were known as
      // TMLastStationOptimizedLowPt* (sans the Barrel) as late as revision
      // 1.7 of this file. The names were changed because indeed the low pt
      // optimization applies only to the barrel region, whereas the sel-
      // ectors above are more efficient at low pt in the endcaps, which is
      // what we feel is more suggestive of the algorithm name. This will be
      // less confusing for future generations of CMS members, I hope...
      TMLastStationOptimizedBarrelLowPtLoose = 22, // combination of TMLastStation and TMOneStation but with low pT optimization in barrel only
      TMLastStationOptimizedBarrelLowPtTight = 23  // combination of TMLastStation and TMOneStation but with low pT optimization in barrel only
   };

   struct SelectionTypeStringToEnum { const char *label; SelectionType value; };
   SelectionType selectionTypeFromString( const std::string &label );
     
   bool isGoodMuon( const reco::Muon& muon, SelectionType type, 
                    reco::Muon::ArbitrationType arbitrationType = reco::Muon::SegmentAndTrackArbitration);

   // ===========================================================================
   //                               Support functions
   // 
   enum AlgorithmType { TMLastStation, TM2DCompatibility, TMOneStation };
   
   // specialized GoodMuon functions called from main wrapper
   bool isGoodMuon( const reco::Muon& muon, 
                    AlgorithmType type,
                    double minCompatibility,
                    reco::Muon::ArbitrationType arbitrationType );
   
   bool isGoodMuon( const reco::Muon& muon, 
                    AlgorithmType type,
                    int minNumberOfMatches,
                    double maxAbsDx,
                    double maxAbsPullX,
                    double maxAbsDy,
                    double maxAbsPullY,
                    double maxChamberDist,
                    double maxChamberDistPull,
                    reco::Muon::ArbitrationType arbitrationType,
                    bool   syncMinNMatchesNRequiredStationsInBarrelOnly = true,//this is what we had originally
                    bool   applyAlsoAngularCuts = false);
   
   // determine if station was crossed well withing active volume
   unsigned int RequiredStationMask( const reco::Muon& muon,
                                     double maxChamberDist,
                                     double maxChamberDistPull,
                                     reco::Muon::ArbitrationType arbitrationType );

   // ------------ method to return the calo compatibility for a track with matched muon info  ------------
   float caloCompatibility(const reco::Muon& muon);

   // ------------ method to calculate the segment compatibility for a track with matched muon info  ------------
   float segmentCompatibility(const reco::Muon& muon,reco::Muon::ArbitrationType arbitrationType = reco::Muon::SegmentAndTrackArbitration);
   
   // Check if two muon trajectory overlap
   // The overlap is performed by comparing distance between two muon
   // trajectories if they cross the same muon chamber. Trajectories 
   // overlap if distance/uncertainty is smaller than allowed pullX 
   // and pullY
   bool overlap( const reco::Muon& muon1, const reco::Muon& muon2, 
                 double pullX = 1.0, double pullY = 1.0, bool checkAdjacentChambers = false);

}
#endif