//************************************************************************//
//									  //
//  Copyright 2013 Bertram Kopf (bertram@ep1.rub.de)			  //
//  	      	   Julian Pychy (julian@ep1.rub.de)			  //
//          	   - Ruhr-Universität Bochum 				  //
//									  //
//  This file is part of Pawian.					  //
//									  //
//  Pawian is free software: you can redistribute it and/or modify	  //
//  it under the terms of the GNU General Public License as published by  //
//  the Free Software Foundation, either version 3 of the License, or 	  //
//  (at your option) any later version.	 	      	  	   	  //
//									  //
//  Pawian is distributed in the hope that it will be useful,		  //
//  but WITHOUT ANY WARRANTY; without even the implied warranty of	  //
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the	  //
//  GNU General Public License for more details.	      		  //
//									  //
//  You should have received a copy of the GNU General Public License     //
//  along with Pawian.  If not, see <http://www.gnu.org/licenses/>.	  //
//									  //
//************************************************************************//

#include "PwaDynamics/FVector.hh"
#include "qft++/relativistic-quantum-mechanics/Utils.hh"


FVector::FVector(boost::shared_ptr<KMatrixBase> Kmatrix, boost::shared_ptr<PVectorRel> Pvector) :
  Matrix< complex<double> >::Matrix(Pvector->NumRows(), Pvector->NumCols())
  , _Kmatrix(Kmatrix)
  ,_Pvector(Pvector)
 {
 }

FVector::FVector(int numRows) :
  Matrix< complex<double> >::Matrix(numRows, 1)
 {
 }

FVector::~FVector(){
}

void FVector::evalMatrix(const double mass){
  _Kmatrix->evalMatrix(mass);
  _Pvector->evalMatrix(mass);

  vector<boost::shared_ptr<AbsPhaseSpace> > phpVec=_Kmatrix->phaseSpaceVec();
  Matrix< complex<double> > theRhoMatrix(NumRows(),NumRows());

  for (int i=0; i<NumRows(); ++i){
    for (int j=0; j<NumRows(); ++j){
      theRhoMatrix(i,j)=complex<double> (0.,0.);
      if (i==j){
        theRhoMatrix(i,j) = phpVec[j]->factor(mass); 
      }
    }
  }

  complex<double> imagCompl(0.,1.); 
  
  IdentityMatrix< complex<double> > theIdMatrix(NumRows());
  Matrix< complex< double > > tmpDenomMatrCompl = theIdMatrix-imagCompl*(*_Kmatrix)*theRhoMatrix;

  Matrix< complex< double > > tmpDenomMatrInv=tmpDenomMatrCompl;
  tmpDenomMatrInv.invert();
  
  Matrix< complex <double> > currentTMatr=tmpDenomMatrInv*(*_Pvector);

  for (int i=0; i<currentTMatr.NumRows(); ++i){
    this->operator()(i,0)=currentTMatr(i,0);
  }

}