//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
//
// $Id: G4GEMChannel.hh,v 1.5 2009/09/15 12:54:16 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
// Hadronic Process: Nuclear De-excitations
// by V. Lara (Oct 1998)
//


#ifndef G4GEMChannel_h
#define G4GEMChannel_h 1

#include "G4VEvaporationChannel.hh"
#include "G4GEMProbability.hh"
#include "G4VLevelDensityParameter.hh"
#include "G4VCoulombBarrier.hh"
#include "G4EvaporationLevelDensityParameter.hh"
#include "G4NucleiProperties.hh"
#include "Randomize.hh"
#include "G4ParticleTable.hh"
#include "G4IonTable.hh"

//#define debug

class G4GEMChannel : public G4VEvaporationChannel
{
public:
    // Available constructors
    G4GEMChannel(const G4int theA, const G4int theZ,
                 G4GEMProbability * aEmissionStrategy,
                 G4VCoulombBarrier * aCoulombBarrier);
    
    G4GEMChannel(const G4int theA, const G4int theZ, const G4String & aName,
                 G4GEMProbability * aEmissionStrategy,
                 G4VCoulombBarrier * aCoulombBarrier);
    
    G4GEMChannel(const G4int theA, const G4int theZ, const G4String * aName,
                 G4GEMProbability * aEmissionStrategy,
                 G4VCoulombBarrier * aCoulombBarrier);
    
public:
    // destructor
    ~G4GEMChannel();
  
    void SetEmissionStrategy(G4GEMProbability * aEmissionStrategy)
        {
            theEvaporationProbabilityPtr = aEmissionStrategy;
        }
  
    void SetCoulombBarrierStrategy(G4VCoulombBarrier * aCoulombBarrier)
        {
            theCoulombBarrierPtr = aCoulombBarrier;
        }
  
protected:
    // default constructor
    G4GEMChannel() {};
  
private:
    // copy constructor
    G4GEMChannel(const G4GEMChannel & right);
  
private:
    const G4GEMChannel & operator=(const G4GEMChannel & right);
  
public:
    G4bool operator==(const G4GEMChannel & right) const;
    G4bool operator!=(const G4GEMChannel & right) const;

public:
    void Initialize(const G4Fragment & fragment);

    G4FragmentVector * BreakUp(const G4Fragment & theNucleus);

    inline void SetLevelDensityParameter(G4VLevelDensityParameter * aLevelDensity)
        {
            if (MyOwnLevelDensity) delete theLevelDensityPtr;
            theLevelDensityPtr = aLevelDensity;
            MyOwnLevelDensity = false;
        }
  
public:


    inline G4double GetEmissionProbability(void) const
        {
            return EmissionProbability;
        }
  
  
    inline G4double GetMaximalKineticEnergy(void) const
        {
            return MaximalKineticEnergy;
        }
  
    // ----------------------
    
private: 
    
    // Calculate Binding Energy for separate fragment from nucleus
    G4double CalcBindingEnergy(const G4int anA, const G4int aZ);

    // Calculate maximal kinetic energy that can be carried by fragment (in MeV)
    G4double CalcMaximalKineticEnergy(const G4double U);

    // Samples fragment kinetic energy.
    G4double CalcKineticEnergy(const G4Fragment & fragment);

    // This has to be removed and put in Random Generator
    G4ThreeVector IsotropicVector(const G4double Magnitude  = 1.0);

	// Data Members
	// ************
private:

    // This data member define the channel. 
  // They are intializated at object creation (constructor) time.
    
    // Atomic Number
    G4int A;
    
    // Charge
    G4int Z;
    

    // For evaporation probability calcualtion
    G4GEMProbability * theEvaporationProbabilityPtr;
    
    // For Level Density calculation
    G4bool MyOwnLevelDensity;
    G4VLevelDensityParameter * theLevelDensityPtr;
    
    // For Coulomb Barrier calculation
    G4VCoulombBarrier * theCoulombBarrierPtr;
    G4double CoulombBarrier;
    
    //---------------------------------------------------
    
    // These values depend on the nucleus that is being evaporated.
    // They are calculated through the Initialize method which takes as parameters 
    // the atomic number, charge and excitation energy of nucleus.
    
    // Residual Atomic Number
    G4int AResidual;

    // Residual Charge
    G4int ZResidual;
    
    // Emission Probability
    G4double EmissionProbability;


    // Maximal Kinetic Energy that can be carried by fragment
    G4double MaximalKineticEnergy;
};


#endif
