#ifndef _SMEARUTIL_H_
#define _SMEARUTIL_H_

/***********************************************************************
**                                                                    **
**          /----------------------------------------------\          **
**         |  Delphes, a framework for the fast simulation  |         **
**         |       of a  generic collider experiment        |         **
**          \-------------  arXiv:0903.2225v1  ------------/          **
**                                                                    **
**                                                                    **
**   This package uses:                                               **
**   ------------------                                               **
**   ROOT: Nucl. Inst. & Meth. in Phys. Res. A389 (1997) 81-86        **
**   FastJet algorithm: Phys. Lett. B641 (2006) [hep-ph/0512210]      **
**   Hector: JINST 2:P09005 (2007) [physics.acc-ph:0707.1198v2]       **
**   FROG: [hep-ex/0901.2718v1]                                       **
**   HepMC: Comput. Phys. Commun.134 (2001) 41                        **
**                                                                    **
** ------------------------------------------------------------------ **
**                                                                    **
**   Main authors:                                                    **
**   -------------                                                    **
**                                                                    **
**                Severine Ovyn                Xavier Rouby           **
**          severine.ovyn@uclouvain.be      xavier.rouby@cern         **
**                                                                    **
**         Center for Particle Physics and Phenomenology (CP3)        **
**                Universite catholique de Louvain (UCL)              **
**                     Louvain-la-Neuve, Belgium                      **
**                                                                    **
**                      Copyright (C) 2008-2009,                      **
**                        All rights reserved.                        **
**                                                                    **
***********************************************************************/

/// \file SmearUtil.h
/// \brief RESOLution class, and some generic definitions


#include <vector>
#include <string>
#include "TLorentzVector.h"

#include "D_Constants.h"
#include "CaloUtil.h"
#include "BlockClasses.h"
#include "TSimpleArray.h"
#include "PhysicsTower.hh"
#include "PdgParticle.h"

using namespace std;

// forward declaration instead of 'include' statement
class TStopwatch;

class D_Particle {

 public:
  D_Particle(const TLorentzVector & p, const int pid, const float etacalo, const float phicalo) : 
	_fourmomentum(p), _pid(pid), _etaCalo(etacalo), _phiCalo(phicalo) {}
  //D_Particle(const float e, const float eta, const float phi, const float pt, const int pid) : 
  //    _pid(pid), _etaCalo(UNDEFINED), _phiCalo(UNDEFINED) { TLorentzVector p; p.SetPtEtaPhiE(pt,eta,phi,e); _fourmomentum = p; }
  D_Particle(const float px, const float py, const float pz, const float e, const int pid) :
	_fourmomentum(px,py,pz,e), _pid(pid), _etaCalo(UNDEFINED), _phiCalo(UNDEFINED) {}

  const float E() const {return _fourmomentum.E();}    // particle energy [GeV]
  const float Px() const {return _fourmomentum.Px();}  // horizontal coordinate of momentum [GeV]
  const float Py() const {return _fourmomentum.Py();}  // vertical coordinate of momentum [GeV]
  const float Pz() const {return _fourmomentum.Pz();}  // longitudinal coordinate of momentum [GeV]
  const float Pt() const {return _fourmomentum.Pt();}  // transverse momentum [GeV]
  const float EtaCalo() const {return _etaCalo;}  // pseudorapidity 
  const float Eta() const {return _fourmomentum.Eta();}  // pseudorapidity 
  const float PhiCalo() const {return _phiCalo;}  // azimuthal angle 
  const float Phi() const  {return _fourmomentum.Phi();}  // azimuthal angle 
  const int PID() const {return _pid;}  // particle energy in [GeV]
  const TLorentzVector& getFourMomentum() const {return _fourmomentum;}

 private:
  TLorentzVector _fourmomentum;
  int _pid;
  float _etaCalo, _phiCalo; 
};

class RESOLution
{
 public:
  /// Constructor
  RESOLution();
  RESOLution(const RESOLution & DET);
  RESOLution& operator=(const RESOLution& DET);
  ~RESOLution() { delete [] TOWER_eta_edges; delete [] TOWER_dphi;};
 
  // Detector coverage
  float CEN_max_tracker;    // tracker pseudorapidity coverage
  float CEN_max_calo_cen;   // central calorimeter pseudorapidity coverage
  float CEN_max_calo_fwd;   // forward calorimeter pseudorapidity coverage
  float CEN_max_mu;         // muon chambers pseudorapidity coverage

  float VFD_min_calo_vfd;  // very forward calorimeter pseudorapidity coverage
  float VFD_max_calo_vfd;  // very forward calorimeter pseudorapidity coverage
  float VFD_min_zdc;        // coverage for Zero Degree Calorimeter, for photons and neutrons
  float VFD_s_zdc;   // distance of the Zero Degree Calorimeter, from the Interaction poin, in [m]

  float RP_220_s; // distance of the RP to the IP, in meters
  float RP_220_x; // distance of the RP to the beam, in meters
  float RP_420_s; // distance of the RP to the IP, in meters
  float RP_420_x; // distance of the RP to the beam, in meters
  string RP_beam1Card;   // optics file for beam 1
  string RP_beam2Card;   // optics file for beam 2
  string RP_IP_name;     // label for IP in the optics file ("IP1" or "IP5")
  float  RP_offsetEl_s;  // distance from IP (in meter) where both beams separate
  float  RP_offsetEl_x;  // distance of separation in horizontal plane, in meter
  float  RP_offsetEl_y;  // distance of separation in vertical plane, in meter
  float  RP_cross_x;	 // IP offset in horizontal plane, in micrometer
  float  RP_cross_y;     // IP offset in vertical plane, in micrometer
  float  RP_cross_ang_x; // half crossing angle, in microradian, horizontal plane
  float  RP_cross_ang_y; // half crossing angle, in microradian, vertical plane


  //energy resolution for electron/photon
  // \sigma/E = C + N/E + S/\sqrt{E}
  float ELG_Scen;   // S term for central ECAL
  float ELG_Ncen;   // N term for central ECAL
  float ELG_Ccen;   // C term for central ECAL
  float ELG_Sfwd;   // S term for forward ECAL
  float ELG_Cfwd;   // C term for forward ECAL
  float ELG_Nfwd;   // N term for forward ECAL
  float ELG_Szdc;   // S term for zdc-em sections
  float ELG_Czdc;   // C term for zdc-em sections
  float ELG_Nzdc;   // N term for zdc-em sections
  
  //energy resolution for hadrons in ecal/hcal/hf
  // \sigma/E = C + N/E + S/\sqrt{E}
  float HAD_Shcal;   // S term for central HCAL // hadronic calorimeter
  float HAD_Nhcal;   // N term for central HCAL
  float HAD_Chcal;   // C term for central HCAL
  float HAD_Shf;     // S term for central HF // forward calorimeter
  float HAD_Nhf;     // N term for central HF
  float HAD_Chf;     // C term for central HF
  float HAD_Szdc;    // S term for zdc-had sections
  float HAD_Czdc;    // C term for zdc-had sections
  float HAD_Nzdc;    // N term for zdc-had sections
 
  // muon smearing
  float MU_SmearPt;

  // time resolution
  float ZDC_T_resolution;
  float RP220_T_resolution;
  float RP420_T_resolution;
  
  //Magnetic Field information
  int   TRACK_radius;                      //radius of the BField coverage
  int   TRACK_length;                      //length of the BField coverage
  float TRACK_bfield_x;
  float TRACK_bfield_y;
  float TRACK_bfield_z;
  float TRACK_ptmin;    // minimal pt needed to reach the calorimeter, in GeV
  int   TRACK_eff;       // in percent, should be an integer
  

  //Define Calorimetric towers
  unsigned int TOWER_number;
  float *      TOWER_eta_edges;
  float *      TOWER_dphi;

  //thresholds for reconstructed objetcs
  float PTCUT_elec;
  float PTCUT_muon;
  float PTCUT_jet;
  float PTCUT_gamma;
  float PTCUT_taujet;

  float ZDC_gamma_E;	// minimal energy of photons for reconstruction in ZDC
  float ZDC_n_E;	// minimal energy of neutrons for reconstruction in ZDC

  float ISOL_PT;      //minimal pt of tracks for isolation criteria
  float ISOL_Cone;    //Cone  for isolation criteria
  float ISOL_Calo_ET;  //minimal tower energy for isolation criteria
  unsigned int ISOL_Calo_Grid; //Grid size (N x N) for calorimetric isolation

  
  //General jet variable
  double JET_coneradius;
  int    JET_jetalgo;
  double JET_seed;
  double JET_overlap;
  
  // MidPoint algorithm definition
  double JET_M_coneareafraction;
  int    JET_M_maxpairsize;
  int    JET_M_maxiterations;
  // Define Cone algorithm.
  int    JET_C_adjacencycut;
  int    JET_C_maxiterations;
  int    JET_C_iratch;
  //Define SISCone algorithm.
  int    JET_S_npass;
  double JET_S_protojet_ptmin;
  
 //For Tau-jet definition
 // R = sqrt (phi^2 + eta^2)
 float TAU_energy_scone;  // radius R of the cone for tau definition, based on energy threshold
 float TAU_track_scone;  // radius R of the cone for tau definition, based on track number
 float TAU_track_pt;     // minimal pt [GeV] for tracks to be considered in tau definition
 float TAU_energy_frac;      // fraction of energy required in the central part of the cone, for tau jets
 
 //tagging definition
 int BTAG_b;         
 int BTAG_mistag_c;
 int BTAG_mistag_l;
 

 //trigger flag
 int FLAG_trigger;             //flag for trigger
 int FLAG_frog;                //flag for frog display
 int FLAG_bfield;               //flag for bfield propagation
 int FLAG_vfd;                  //flag for very forward detector
 int FLAG_RP;                  //flag for very forward detector
 int FLAG_lhco;                  //flag for very forward detector
 
 int NEvents_Frog;	 // number of events to be displayed in frog
 int NEvents;            // number of events to be processed
 float PT_QUARKS_MIN;    // minimal pt needed for quarks to reach the tracker, in GeV
 int JET_Eflow;

 string PdgTableFilename;
 PdgTable PDGtable;
 string inputfilelist, detectorcard, triggercard;

  // to sort a vector
  //void SortedVector(vector<ParticleUtil> &vect);
  void SortedVector(vector<D_Particle> &vect);

  /// Reads the data card for the initialisation of the parameters 
  void ReadDataCard(const string datacard);

  /// Reads the PDG table
  void ReadParticleDataGroupTable();
 
  /// Create the output log file
  void Logfile(const string& LogName);
  
  /// Provides the smeared TLorentzVector for the electrons
  void SmearElectron(TLorentzVector &electron);
  
  /// Provides the smeared TLorentzVector for the muons
  void SmearMu(TLorentzVector &muon);
  
  /// Provides the smeared TLorentzVector for the hadrons
  void SmearHadron(TLorentzVector &hadron, const float frac);
  
  /// For electromagnetic collimation in tau jets
  double EnergySmallCone(const vector<PhysicsTower> &towers, const float eta, const float phi);

  /// Number of tracks in tau jet algo
  //unsigned int NumTracks(float& charge, const vector<TLorentzVector> &tracks, const float pt_track, const float eta, const float phi);
  unsigned int NumTracks(float& charge, const vector<TRootTracks> &tracks, const float pt_track, const float eta, const float phi);

  /// b-jets
  int Bjets(const TSimpleArray<TRootC::GenParticle> &subarray, const float& eta, const float& phi);
  
  /// b-tag efficiency and misidentification
  bool Btaggedjet(const TLorentzVector &JET, const TSimpleArray<TRootC::GenParticle> &subarray);

  /// Lepton isolation based on tracking
  bool Isolation(const D_Particle& part, const vector<TRootTracks> &tracks, const float& pt_second_track, const float& isolCone, float& ptiso);

  /// Lepton isolation based on calorimetry (optional. Default: off)
  float CaloIsolation(const D_Particle& part,  const D_CaloTowerList & towers, const float iPhi, const float iEta);

  //********************* returns a segmented value for eta and phi, for calo towers *****
  void BinEtaPhi(const float phi, const float eta, float& iPhi, float& iEta);

  void setNames(const string& list, const string& det, const string& trig);
};

// ** returns the sign (+1 or -1) or an integer
int sign(const int myint);
int sign(const float myfloat);

// **************************** Return the Delta Phi****************************
float DeltaPhi(const float phi1, const float phi2);

// **************************** Returns the Delta R****************************
float DeltaR(const float phi1, const float eta1, const float phi2, const float eta2);

//************* Returns an array of the quarks sitting within the tracker acceptance ***************
int ChargeVal(const int pid);

// ********************* prints the time report on screen and in Logfile *********
void time_report(const TStopwatch& global,const TStopwatch& loop,const TStopwatch& trigger,const TStopwatch& frog,const TStopwatch& lhco, const int flag_frog, const int flag_trigger, const int flag_lhco, const string& LogName, const Long64_t allEntries);

void print_header();
string get_time_date();
#endif