//-----------------------------------------------------------
// File and Version Information:
// $Id$
//
// Description:
//      Implementation of class GeaneTrackRep
//      see GeaneTrackRep.hh for details
//
// Environment:
//      Software developed for the PANDA Detector at FAIR.
//
// Author List:
//      Sebastian Neubert    TUM            (original author)
//
//
//-----------------------------------------------------------

// Panda Headers ----------------------

// This Class' Header ------------------
#include "GeaneTrackRep.h"
#include "CbmGeaneUtil.h"
#include "CbmTrackParH.h"

// C/C++ Headers ----------------------
#include <iostream>

// Collaborating Class Headers --------
#include "AbsRecoHit.h"
#include "CbmGeanePro.h"

// Class Member definitions -----------



GeaneTrackRep::GeaneTrackRep()
  : AbsTrackRep(5)
{
  std::cout<<"GeaneTrackRep::Standard Ctor"<<std::endl;
}

GeaneTrackRep::GeaneTrackRep(CbmGeanePro* geane, 
			     const TVector3& pos,
			     const TVector3& mom,
			     const TVector3& poserr,
			     const TVector3& momerr,
			     double q,
			     DetPlane& plane) 
  : AbsTrackRep(5), _geane(geane)
{
  
  CbmTrackParP par(pos,mom,poserr,momerr,q,plane.getO(),plane.getU(),plane.getV());

  state[0][0]=par.GetQp();
  state[1][0]=par.GetTV();
  state[2][0]=par.GetTW();
  state[3][0]=par.GetV();
  state[4][0]=par.GetW();

  // blow up cov-array: ROOT does not support init with symmetric data
  // See ROOT docu source-file for TMatrixTSym
  // i=row, j=collumn
  double* covarray=par.GetCov();
  int count=0;
  for(int i=0;i<5;++i){
    for(int j=i;j<5;++j){
      cov[i][j]=covarray[count];
      if(i!=j)cov[j][i]=covarray[count];
      ++count;
    }
  }

  _refPlane=plane;
}

//  GeaneTrackRep::GeaneTrackRep(const GeaneTrackRep& rep) 
//   : AbsTrackRep(rep)
// {
//   _geane=rep._geane;
// }


GeaneTrackRep::~GeaneTrackRep()
{
  
}


void 
GeaneTrackRep::extrapolate(const DetPlane& pl, 
			 TMatrixT<double>& statePred)
{
  // double sExtrapolateTo=pl.getO().Z();
//   Nystrom rungeKutta(_eqm);
//   //prepare the vectors
//   TVectorT<double> u(3);u[0]=state[0][0];u[1]=state[1][0];u[2]=s;
//   TVectorT<double> uprim(3);uprim[0]=state[2][0];uprim[1]=state[3][0];uprim[2]=1;
//   TVectorT<double> par(1);par[0]=state[4][0];

//   TVectorT<double> unew(3);
//   TVectorT<double> uprimnew(3);
//   rungeKutta.propagate(s,sExtrapolateTo,
// 		       u, uprim, par,
// 		       unew, uprimnew);
//   // write results into statePred
//   statePred[0][0]=unew[0];
//   statePred[1][0]=unew[1];
//   statePred[2][0]=uprimnew[0];
//   statePred[3][0]=uprimnew[1];
//   statePred[4][0]=state[4][0];
//   //std::cout<<"unew[2]=z="<<unew[2];
  throw;
}


void 
GeaneTrackRep::extrapolate(const DetPlane& pl, 
			 TMatrixT<double>& statePred,
			 TMatrixT<double>& covPred,
			 TMatrixT<double>& jacobian)
{

  TVector3 o=pl.getO();
  TVector3 u=pl.getU();
  TVector3 v=pl.getV();

  TVector3 ofrom=_refPlane.getO();
  TVector3 ufrom=_refPlane.getU();
  TVector3 vfrom=_refPlane.getV();


  //_geane->SetPoint(og);
  _geane->PropagateFromPlane(ufrom,vfrom);

  _geane->PropagateToPlane(o,u,v);

  CbmTrackParP result;
  CbmTrackParH result2;

  //std::cout<<"Before prop:"<<std::endl;
  //Print();

  double cova[15];
  int count=0;;
  for(int i=0; i<5;++i){
    for(int j=i;j<5;++j){
      cova[count++]=cov[i][j];
    }
  }

  CbmTrackParP par(state[3][0],state[4][0],state[1][0],state[2][0],state[0][0],cova,ofrom,ufrom,vfrom);

//   std::cout<<"qp="<<par.GetQp()<<"  Dqp="<<par.GetDQp()<<std::endl;
//   std::cout<<"TV="<<par.GetTV()<<"  DTV="<<par.GetDTV()<<std::endl;
//   std::cout<<"TW="<<par.GetTW()<<"  DTW="<<par.GetDTW()<<std::endl;
//   std::cout<<"V="<<par.GetV()<<"  DV="<<par.GetDV()<<std::endl;
//   std::cout<<"W="<<par.GetW()<<"  DW="<<par.GetDW()<<std::endl;

  // Todo: put pdgcode into constructor!
  _geane->Propagate(&par,&result,211);

  TVector3 pcap=_geane->GetPCAOnTrack();
  //  std::cout<<"pcaontrack="<<pcap.X()<<"\t"<<pcap.Y()<<"\t"<<pcap.Z()<<std::endl;

//    CbmGeaneUtil *fUtil = new CbmGeaneUtil();
//    Double_t PD[3], RD[15], H[3], CH, SPU, DJ[3], DK[3], PC[3], RC[15];
//    Int_t IERR;
       
// 	 PD[0] = result.GetQp()/result.GetQ();
// 	 PD[1] = result.GetV();
// 	 PD[2] = result.GetW();
       
// 	 result.GetCov(RD);
        
// 	 H[0] = 0; H[1] = 0; H[2] = 0;
// 	 CH = _ParP.GetQ()/TMath::Abs(_ParP.GetQ());
        
// 	 DJ[0] = result.GetJVer().X();
// 	 DJ[1] = result.GetJVer().Y();
// 	 DJ[2] = result.GetJVer().Z();
// 	 DK[0] = result.GetKVer().X();
// 	 DK[1] = result.GetKVer().Y();
// 	 DK[2] = result.GetKVer().Z();
	 
// //	 cout << "error alpha" << fRes->GetDPx() << endl;
       
// 	 fUtil->FromSDToSC(PD, RD, H, CH, SPU, DJ, DK, IERR, PC, RC);

//      result2.SetQp(PC[0]);
//      result2.SetLambda(PC[1]);
//      result2.SetPhi(PC[2]);

  
  statePred[0][0]=result.GetQp();
  statePred[1][0]=result.GetTV();
  statePred[2][0]=result.GetTW();
  statePred[3][0]=result.GetV();
  statePred[4][0]=result.GetW();

  double* rescov=result.GetCov();
  count=0;
  for(int i=0;i<5;++i){
    for(int j=i;j<5;++j){
      covPred[i][j]=rescov[count];
      if(i!=j)covPred[j][i]=rescov[count];
      ++count;
    }
  }

// //   statePred[0][0]=result2.GetQp();
// //   statePred[1][0]=result2.GetLambda();
// //   statePred[2][0]=result2.GetPhi();
// //   statePred[3][0]=result2.GetY();
// //   statePred[4][0]=result2.GetZ();


  // //std::cout << "Extr from To: " << s << " " << sExtrapolateTo << std::endl;
//   extrapolate(pl,statePred);
//   // covPred=JCovJ^T with J being Jacobian
//   jacobian.ResizeTo(5,5);
//   Jacobian(pl,statePred,jacobian);
//   TMatrixT<double> dummy(cov,TMatrixT<double>::kMultTranspose,jacobian);
//   covPred=jacobian*dummy;
  //covPred=cov;
}

void 
GeaneTrackRep::predict(const DetPlane& pl, 
		     TMatrixT<double>& statePred,
		     TMatrixT<double>& covPred,
		     TMatrixT<double>& jacobian)
{
  extrapolate(pl,statePred,covPred,jacobian);
}

		

TVector3 
GeaneTrackRep::getPos(const DetPlane& pl)
{
//   double z=pl.getO().Z();
//   TMatrixT<double> statePred(state);
//   DetPlane p(TVector3(0,0,z),TVector3(1,0,0),TVector3(0,1,0));
//   extrapolate(p,statePred);
  throw;
  return TVector3(0,0,0);
}
 
TVector3 
GeaneTrackRep::getMom(const DetPlane& pl)
{
 //  double z=pl.getO().Z();
//   TMatrixT<double> statePred(state);
//   //statePred.Print();
//   DetPlane p(TVector3(0,0,z),TVector3(1,0,0),TVector3(0,1,0));
//   extrapolate(p,statePred);
//   //statePred.Print();
//   TVector3 result(statePred[2][0],statePred[3][0],1);
//   result.SetMag(1./statePred[4][0]);
  throw;
   return TVector3(0,0,0);
}
	      
ClassImp(GeaneTrackRep)