// This class provides an interface between the HYDJET++ Monte-Carlo model
// and AliRoot (by inheriting from the AliGenMC class).
// This class uses the TUHKMgen class (which inherits from TGenerator) to
// transmit parameters and receive output from the model.

#ifndef ALIGENUHKM_H
#define ALIGENUHKM_H

#include <string>

//#include <TString.h>
//#include <TParticle.h>

#include "AliGenMC.h"
#include "TUHKMgen.h"
#ifndef INITIALSTATEHYDJET_H
#include "InitialStateHydjet.h"
#endif

using namespace std;


class AliGenUHKM : public AliGenMC
{
   
 public:
  AliGenUHKM();
  AliGenUHKM(Int_t npart);
  
  virtual ~AliGenUHKM();
  virtual void    Generate();
  virtual void    Init();
  //  virtual void    AddHeader(AliGenEventHeader* header);
  
  // Setters
  // set reasonable default parameters suited for central Au+Au collisions at RHIC(200GeV)
  void SetAllParametersRHIC();
  // set reasonable default parameters suited for central Pb+Pb collisions at LHC(5.5TeV)
  void SetAllParametersLHC();
  
  void SetEcms(Double_t value) {fHydjetParams.fSqrtS = value;}          // CMS energy per nucleon [GeV] (<2.24 given temperature and ch pot are used)
  void SetAw(Double_t value) {fHydjetParams.fAw = value;}             // nuclei mass number
  void SetBmin(Double_t value) {fHydjetParams.fBmin = value;}           // Minimum impact parameter
  void SetBmax(Double_t value) {fHydjetParams.fBmax = value;}           // Maximum impact parameter
  void SetChFrzTemperature(Double_t value) {fHydjetParams.fT = value;}  // Temperature for the chemical freezeout [GeV]
  void SetMuB(Double_t value) {fHydjetParams.fMuB = value;}            // Baryonic chemical potential [GeV]
  void SetMuS(Double_t value) {fHydjetParams.fMuS = value;}            // Strangeness chemical potential [GeV]
  void SetMuQ(Double_t value) {fHydjetParams.fMuI3 = value;}  // Isospin chemical potential [GeV]
  void SetThFrzTemperature(Double_t value) {fHydjetParams.fThFO = value;}  // Temperature for the thermal freezeout [GeV]
  void SetMuPionThermal(Double_t value) {fHydjetParams.fMu_th_pip = value;} // Chemical potential for pi+ at thermal freezeout [GeV]
  void SetSeed(Int_t value) {fHydjetParams.fSeed = value;} //parameter to set the random nuber seed (=0 the current time is used
  //to set the random generator seed, !=0 the value fSeed is
  //used to set the random generator seed and then the state of random
  //number generator in PYTHIA MRPY(1)=fSeed
  void SetTauB(Double_t value) {fHydjetParams.fTau = value;}  // Proper time for the freeze-out hyper surface [fm/c]
  void SetSigmaTau(Double_t value) {fHydjetParams.fSigmaTau = value;}  // Standard deviation for the proper time (emission duration) [fm/c]
  void SetRmaxB(Double_t value) {fHydjetParams.fR = value;}              // Maximal transverse radius [fm]
  void SetYlMax(Double_t value) {fHydjetParams.fYlmax = value;}          // Maximal fireball longitudinal rapidity
  void SetEtaRMax(Double_t value) {fHydjetParams.fUmax = value;}           // Maximal transverse velocity
  void SetMomAsymmPar(Double_t value) {fHydjetParams.fDelta = value;}          // Momentum asymmetry parameter
  void SetCoordAsymmPar(Double_t value) {fHydjetParams.fEpsilon = value;}        // Coordinate asymmetry parameter

  void SetEtaType(Int_t value) {fHydjetParams.fEtaType = value;} // flag to choose rapidity distribution, if fEtaType<=0,
                                                  //then uniform rapidity distribution in [-fYlmax,fYlmax] if fEtaType>0,
                                                  //then Gaussian with dispertion = fYlmax
  void SetGammaS(Double_t value) {fHydjetParams.fCorrS = value;} // Strangeness suppression parameter (if gamma_s<=0 then it will be calculated)
  
  //PYQUEN parameters
  void SetPyquenNhsel(Int_t value) {fHydjetParams.fNhsel = value;} // Flag to choose the type of event to be generated
                                              // fNhsel = 0 --> UHKM fireball, no jets
                                              // fNhsel = 1 --> UHKM fireball, jets with no quenching
                                              // fNhsel = 2 --> UHKM fireball, jets with quenching
                                              // fNhsel = 3 --> no UHKM fireball, jets with no quenching
                                              // fNhsel = 4 --> no UHKM fireball, jets with quenching
  void SetPyquenShad(Int_t value) {fHydjetParams.fIshad = value;}//flag to switch on/off impact parameter dependent nuclear
                                                 // shadowing for gluons and light sea quarks (u,d,s) (0: shadowing off,
                                                 // 1: shadowing on for fAw=207, 197, 110, 40, default: 1
  void SetPyquenPtmin(Double_t value) {fHydjetParams.fPtmin = value;} // Pyquen input parameter for minimum Pt of parton-parton scattering (5GeV<pt<500GeV)
  void SetPyquenT0(Double_t value) {fHydjetParams.fT0 = value;}        //proper QGP formation tempereture
  void SetPyquenTau0(Double_t value) {fHydjetParams.fTau0 = value;}    //proper QGP formation time in fm/c (0.01<fTau0<10)
  void SetPyquenNf(Int_t value) {fHydjetParams.fNf = value;}  //number of active quark flavours N_f in QGP fNf=0, 1,2 or 3
  void SetPyquenIenglu(Int_t value) {fHydjetParams.fIenglu = value;}  // flag to fix type of in-medium partonic energy loss
                                                        //(0: radiative and collisional loss, 1: radiative loss only, 2:
                                                        //collisional loss only) (default: 0);
  void SetPyquenIanglu(Int_t value) {fHydjetParams.fIanglu = value;}  //flag to fix type of angular distribution of in-medium emitted
                                                   //gluons (0: small-angular, 1: wide-angular, 2:collinear) (default: 0).


  void SetPDGParticleFile(const Char_t *name) {strncpy(fParticleFilename, name, 255);}//Set the filename containing the particle PDG info
  void SetPDGDecayFile(const Char_t *name) {strncpy(fDecayFilename, name, 255);} //Set the filename containing the PDG decay channels info
  void SetPDGParticleStable(Int_t pdg, Bool_t value) { // Turn on/off the decay flag for a PDG particle
    fStableFlagPDG[fStableFlagged] = pdg;
    fStableFlagStatus[fStableFlagged++] = value;
  }

  // Getters
  Double_t GetEcms() const {return fHydjetParams.fSqrtS;}
  Double_t GetAw() const {return fHydjetParams.fAw;}
  Double_t GetBmin() const {return fHydjetParams.fBmin;}
  Double_t GetBmax() const {return fHydjetParams.fBmax;}
  Double_t GetChFrzTemperature() const {return fHydjetParams.fT;}
  Double_t GetMuB() const {return fHydjetParams.fMuB;}
  Double_t GetMuS() const {return fHydjetParams.fMuS;}
  Double_t GetMuQ() const {return fHydjetParams.fMuI3;}
  Double_t GetThFrzTemperature() const {return fHydjetParams.fThFO;}
  Double_t GetMuPionThermal() const {return fHydjetParams.fMu_th_pip;}
  Int_t    GetSeed() const {return fHydjetParams.fSeed;}
  Double_t GetTauB() const {return fHydjetParams.fTau;}
  Double_t GetSigmaTau() const {return fHydjetParams.fSigmaTau;}
  Double_t GetRmaxB() const {return fHydjetParams.fR;}
  Double_t GetYlMax() const {return fHydjetParams.fYlmax;}
  Double_t GetEtaRMax() const {return fHydjetParams.fUmax;}
  Double_t GetMomAsymmPar() const {return fHydjetParams.fDelta;}
  Double_t GetCoordAsymmPar() const {return fHydjetParams.fEpsilon;}
  Int_t    GetEtaType() const {return fHydjetParams.fEtaType;}
  Double_t GetGammaS() const {return fHydjetParams.fCorrS;}
  Int_t    GetPyquenNhsel() const {return fHydjetParams.fNhsel;}
  Int_t    GetPyquenShad() const {return fHydjetParams.fIshad;}
  Double_t GetPyquenPtmin() const {return fHydjetParams.fPtmin;}
  Double_t GetPyquenT0() const {return fHydjetParams.fT0;}
  Double_t GetPyquenTau0() const {return fHydjetParams.fTau0;}
  Double_t GetPyquenNf() const {return fHydjetParams.fNf;}
  Double_t GetPyquenIenglu() const {return fHydjetParams.fIenglu;}
  Double_t GetPyquenIanglu() const {return fHydjetParams.fIanglu;}
  const Char_t*  GetPDGParticleFile() const {return fParticleFilename;}
  const Char_t*  GetPDGDecayFile() const {return fDecayFilename;}

 protected:
  Int_t       fTrials;         // Number of trials
  TUHKMgen    *fUHKMgen;       // UHKM
  
  InitialParamsHydjet_t fHydjetParams;    // list of parameters for the initial state
  // details for the PDG database
  Char_t fParticleFilename[256];            // particle list filename
  Char_t fDecayFilename[256];               // decay table filename
  Int_t fStableFlagPDG[500];                // array of PDG codes flagged
  Bool_t fStableFlagStatus[500];            // array of decay flag status
  Int_t fStableFlagged;                     // number of toggled decay flags

  void SetAllParameters();
  void CheckPDGTable();
  
 private:
  void Copy(TObject &rhs) const;
  AliGenUHKM(const AliGenUHKM&);
  AliGenUHKM & operator = (const AliGenUHKM &);

  ClassDef(AliGenUHKM, 6) // AliGenerator interface to UHKM
};
#endif