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//
// $Id: Lepton.h,v 1.23 2010/03/02 21:01:48 rwolf Exp $
//

#ifndef DataFormats_PatCandidates_Lepton_h
#define DataFormats_PatCandidates_Lepton_h

#include "DataFormats/Candidate/interface/Particle.h"
#include "DataFormats/PatCandidates/interface/PATObject.h"
#include "DataFormats/PatCandidates/interface/Isolation.h"


namespace pat {


  template <class LeptonType>
  class Lepton : public PATObject<LeptonType> {

    public:

      Lepton();
      Lepton(const LeptonType & aLepton);
      Lepton(const edm::RefToBase<LeptonType> & aLeptonRef);
      Lepton(const edm::Ptr<LeptonType> & aLeptonRef);
      virtual ~Lepton();

      virtual Lepton<LeptonType> * clone() const { return new Lepton<LeptonType>(*this); }

      const reco::GenParticle * genLepton() const { return PATObject<LeptonType>::genParticle(); }

      void setGenLepton(const reco::GenParticleRef & gl, bool embed=false) { PATObject<LeptonType>::setGenParticleRef(gl, embed); }

      //============ BEGIN ISOLATION BLOCK =====      
      float userIsolation(IsolationKeys key) const { 
          if (key >= 0) {
            //if (key >= isolations_.size()) throw cms::Excepton("Missing Data") 
            //<< "Isolation corresponding to key " 
            //<< key << " was not stored for this particle.";
              if (size_t(key) >= isolations_.size()) return -1.0;
              return isolations_[key];
          } else switch (key) {
          case pat::CaloIso:  
            //if (isolations_.size() <= pat::HcalIso) throw cms::Excepton("Missing Data") 
            //<< "CaloIso Isolation was not stored for this particle.";
            if (isolations_.size() <= pat::HcalIso) return -1.0; 
            return isolations_[pat::EcalIso] + isolations_[pat::HcalIso];
          default:
            return -1.0;
            //throw cms::Excepton("Missing Data") << "Isolation corresponding to key " 
            //<< key << " was not stored for this particle.";
          }
      }
      float userIsolation(const std::string& key) const {
        // remove leading namespace specifier
        std::string prunedKey = ( key.find("pat::") == 0 ) ? std::string(key, 5) : key;
        if ( prunedKey == "TrackIso" ) return userIsolation(pat::TrackIso);
        if ( prunedKey == "EcalIso" ) return userIsolation(pat::EcalIso);
        if ( prunedKey == "HcalIso" ) return userIsolation(pat::HcalIso);
        if ( prunedKey == "PfAllParticleIso" ) return userIsolation(pat::PfAllParticleIso);
        if ( prunedKey == "PfChargedHadronIso" ) return userIsolation(pat::PfChargedHadronIso);
        if ( prunedKey == "PfNeutralHadronIso" ) return userIsolation(pat::PfNeutralHadronIso);
        if ( prunedKey == "PfGammaIso" ) return userIsolation(pat::PfGammaIso);
        if ( prunedKey == "User1Iso" ) return userIsolation(pat::User1Iso);
        if ( prunedKey == "User2Iso" ) return userIsolation(pat::User2Iso);
        if ( prunedKey == "User3Iso" ) return userIsolation(pat::User3Iso);
        if ( prunedKey == "User4Iso" ) return userIsolation(pat::User4Iso);
        if ( prunedKey == "User5Iso" ) return userIsolation(pat::User5Iso);
        if ( prunedKey == "UserBaseIso" ) return userIsolation(pat::UserBaseIso);
        if ( prunedKey == "CaloIso" ) return userIsolation(pat::CaloIso);
        //throw cms::Excepton("Missing Data")
        //<< "Isolation corresponding to key " 
        //<< key << " was not stored for this particle.";
        return -1.0;
      }
      void setIsolation(IsolationKeys key, float value) {
          if (key >= 0) {
              if (size_t(key) >= isolations_.size()) isolations_.resize(key+1, -1.0);
              isolations_[key] = value;
          } else {
              throw cms::Exception("Illegal Argument") << 
                  "The key for which you're setting isolation does not correspond " <<
                  "to an individual isolation but to the sum of more independent isolations " <<
                  "(e.g. Calo = Ecal + Hcal), so you can't SET the value, just GET it.\n" <<
                  "Please set up each component independly.\n";
          }
      }

      // ---- specific getters ----
      float trackIso() const { return userIsolation(pat::TrackIso); }
      float caloIso()  const { return userIsolation(pat::CaloIso); }
      float ecalIso()  const { return userIsolation(pat::EcalIso); }
      float hcalIso()  const { return userIsolation(pat::HcalIso); }

      float particleIso() const { return userIsolation(pat::PfAllParticleIso); }
      float chargedHadronIso() const { return userIsolation(pat::PfChargedHadronIso); }
      float neutralHadronIso() const { return userIsolation(pat::PfNeutralHadronIso); } 
      float photonIso() const { return userIsolation(pat::PfGammaIso); }        
      float userIso(uint8_t index=0)  const { return userIsolation(IsolationKeys(UserBaseIso + index)); }

      // ---- specific setters ----
      void setTrackIso(float trackIso) { setIsolation(pat::TrackIso, trackIso); }
      void setEcalIso(float caloIso)   { setIsolation(pat::EcalIso, caloIso);  } 
      void setHcalIso(float caloIso)   { setIsolation(pat::HcalIso, caloIso);  }
      void setUserIso(float value, uint8_t index=0)  { setIsolation(IsolationKeys(UserBaseIso + index), value); }


      //============ BEGIN ISODEPOSIT BLOCK =====
      const IsoDeposit * isoDeposit(IsolationKeys key) const {
          for (IsoDepositPairs::const_iterator it = isoDeposits_.begin(), ed = isoDeposits_.end(); 
                  it != ed; ++it) 
          {
              if (it->first == key) return & it->second;
          }
          return 0;
      } 

      void setIsoDeposit(IsolationKeys key, const IsoDeposit &dep) {
          IsoDepositPairs::iterator it = isoDeposits_.begin(), ed = isoDeposits_.end();
          for (; it != ed; ++it) {
              if (it->first == key) { it->second = dep; return; }
          }
          isoDeposits_.push_back(std::make_pair(key,dep));
      } 

      // ---- specific getters ----
      const IsoDeposit * trackIsoDeposit() const { return isoDeposit(pat::TrackIso); }
      const IsoDeposit * ecalIsoDeposit()  const { return isoDeposit(pat::EcalIso ); }
      const IsoDeposit * hcalIsoDeposit()  const { return isoDeposit(pat::HcalIso ); }
      const IsoDeposit * userIsoDeposit(uint8_t index=0) const { return isoDeposit(IsolationKeys(UserBaseIso + index)); }

      // ---- specific setters ----
      void trackIsoDeposit(const IsoDeposit &dep) { setIsoDeposit(pat::TrackIso,dep); }
      void ecalIsoDeposit(const IsoDeposit &dep)  { setIsoDeposit(pat::EcalIso, dep); }
      void hcalIsoDeposit(const IsoDeposit &dep)  { setIsoDeposit(pat::HcalIso, dep); }
      void userIsoDeposit(const IsoDeposit &dep, uint8_t index=0) { setIsoDeposit(IsolationKeys(UserBaseIso + index), dep); }


    protected:
      // --- Isolation and IsoDeposit related datamebers ---
      typedef std::vector<std::pair<IsolationKeys, pat::IsoDeposit> > IsoDepositPairs;
      IsoDepositPairs    isoDeposits_;
      std::vector<float> isolations_;
  };


  template <class LeptonType>
  Lepton<LeptonType>::Lepton() :
    PATObject<LeptonType>(LeptonType()) {
    // no common constructor, so initialize the candidate manually
    this->setCharge(0);
    this->setP4(reco::Particle::LorentzVector(0, 0, 0, 0));
    this->setVertex(reco::Particle::Point(0, 0, 0));
  }


  template <class LeptonType>
  Lepton<LeptonType>::Lepton(const LeptonType & aLepton) :
    PATObject<LeptonType>(aLepton) {
  }


  template <class LeptonType>
  Lepton<LeptonType>::Lepton(const edm::RefToBase<LeptonType> & aLeptonRef) :
    PATObject<LeptonType>(aLeptonRef) {
  }


  template <class LeptonType>
  Lepton<LeptonType>::Lepton(const edm::Ptr<LeptonType> & aLeptonRef) :
    PATObject<LeptonType>(aLeptonRef) {
  }


  template <class LeptonType>
  Lepton<LeptonType>::~Lepton() {
  }
}

#endif