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// $Id$
//
// Hadronic Process: Nuclear Preequilibrium
// by V. Lara
//
// Modified:
// 03.09.2008 by J. M. Quesada for external choice of inverse 
// cross section option 
// 06.09.2008 JMQ Also external choice has been added for:
//                - superimposed Coulomb barrier (if useSICB=true) 
// 27.08.2010 V.Ivanchenko simplify and make more efficient by adding extra
//            vector of probabilities, moved constructor and destructor to source, 
//            simplify run time computations making inlined
// 

#ifndef G4PreCompoundFragmentVector_h
#define G4PreCompoundFragmentVector_h 1

#include "G4VPreCompoundFragment.hh"
#include "G4DataVector.hh"
#include "Randomize.hh"
#include "globals.hh"
#include <vector>

typedef std::vector<G4VPreCompoundFragment*>  pcfvector;

class G4PreCompoundFragmentVector 
{
public:

  G4PreCompoundFragmentVector(pcfvector * avector);

  ~G4PreCompoundFragmentVector();

  void SetVector(pcfvector * avector);

  void SetOPTxs(G4int);

  void UseSICB(G4bool);

  inline void Initialize(const G4Fragment & aFragment);

  inline G4double CalculateProbabilities(const G4Fragment & aFragment);
	
  inline G4VPreCompoundFragment * ChooseFragment();
		  
private:

  G4PreCompoundFragmentVector(const G4PreCompoundFragmentVector &right);
  const G4PreCompoundFragmentVector& 
  operator=(const G4PreCompoundFragmentVector &right);
  G4bool operator==(const G4PreCompoundFragmentVector &right) const;
  G4bool operator!=(const G4PreCompoundFragmentVector &right) const;	
  
  pcfvector * theChannels;
  G4DataVector probabilities;

  G4int nChannels;

};

inline void 
G4PreCompoundFragmentVector::Initialize(const G4Fragment & aFragment)
{
  for (G4int i=0; i< nChannels; ++i) { 
    (*theChannels)[i]->Initialize(aFragment);
  }
}

inline G4double 
G4PreCompoundFragmentVector::CalculateProbabilities(const G4Fragment & aFragment)
{
  //G4cout << "## G4PreCompoundFragmentVector::CalculateProbabilities" << G4endl;
  G4double probtot = 0.0; 
  for (G4int i=0; i< nChannels; ++i) { 
    G4double prob = (*theChannels)[i]->CalcEmissionProbability(aFragment);
    probtot += prob;
    probabilities[i] = probtot;
    //G4cout<<" prob= "<<prob<<" for "<<(*theChannels)[i]->GetName()<<G4endl;
  }
  return probtot;
}

inline G4VPreCompoundFragment* G4PreCompoundFragmentVector::ChooseFragment()
{
  G4double x = probabilities[nChannels-1]*G4UniformRand();
  G4int i=0;
  for (; i<nChannels; ++i) { 
    if(x <= probabilities[i]) { break; }
  }
  return (*theChannels)[i];  
}

#endif