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#ifndef G4QGSParticipants_h
#define G4QGSParticipants_h 1

#include "Randomize.hh"
#include "G4VParticipants.hh"
#include "G4Nucleon.hh"
#include "G4InteractionContent.hh"
#include "G4PomeronCrossSection.hh"
#include "G4QGSDiffractiveExcitation.hh"
#include "G4SingleDiffractiveExcitation.hh"
#include "G4PartonPair.hh" 
#include "G4QGSMSplitableHadron.hh" 
#include "G4V3DNucleus.hh"


class G4QGSParticipants : public G4VParticipants
{
public:
	G4QGSParticipants();
	G4QGSParticipants(const G4QGSParticipants &right);
	const G4QGSParticipants & operator=(const G4QGSParticipants &right);
	virtual ~G4QGSParticipants();

	int operator==(const G4QGSParticipants &right) const;
	int operator!=(const G4QGSParticipants &right) const;

	virtual void DoLorentzBoost(G4ThreeVector aBoost)
	{
		if(theNucleus) theNucleus->DoLorentzBoost(aBoost);
		theBoost = aBoost;
	}

	G4PartonPair* GetNextPartonPair();
	void BuildInteractions(const G4ReactionProduct  &thePrimary);
	void StartPartonPairLoop();

protected:
	virtual G4VSplitableHadron* SelectInteractions(const G4ReactionProduct  &thePrimary);
	void SplitHadrons(); 
	void PerformSoftCollisions();
	void PerformDiffractiveCollisions();

protected:
	struct DeleteInteractionContent {void operator()(G4InteractionContent*aC){delete aC;}};
	std::vector<G4InteractionContent*> theInteractions;
	struct DeleteSplitableHadron{void operator()(G4VSplitableHadron*aS){delete aS;}};
	std::vector<G4VSplitableHadron*>   theTargets;
	struct DeletePartonPair{void operator()(G4PartonPair*aP){delete aP;}};
	std::vector<G4PartonPair*>   thePartonPairs;

	G4SingleDiffractiveExcitation theSingleDiffExcitation;
	G4QGSDiffractiveExcitation theDiffExcitaton;
	G4int ModelMode;
	G4bool IsSingleDiffractive();

	G4ThreeVector theBoost;

protected:
	// model parameters HPW
	enum  { SOFT, DIFFRACTIVE };
	const G4int nCutMax;
	const G4double ThresholdParameter;
	const G4double QGSMThreshold;
	const G4double theNucleonRadius;

};


inline G4bool G4QGSParticipants::IsSingleDiffractive()
{
	G4bool result=false;
	if(G4UniformRand()<1.) result = true;
	return result;
}

inline void G4QGSParticipants::StartPartonPairLoop()
{
}

inline G4PartonPair* G4QGSParticipants::GetNextPartonPair()
{
	if (thePartonPairs.empty()) return 0;
	G4PartonPair * result = thePartonPairs.back();
	thePartonPairs.pop_back();
	return result;
}


inline void G4QGSParticipants::SplitHadrons()
{
	unsigned int i;
	for(i = 0; i < theInteractions.size(); i++)
	{
		theInteractions[i]->SplitHadrons();
	}
}

#endif