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// -------------------------------------------------------------------
//      GEANT4 Class file
//
//
//      File name: G4QMDReaction.hh 
//
//      Author: Koi, Tatsumi (tkoi@slac.stanford.edu)       
// 
//      Creation date: 02 April 2007
// -----------------------------------------------------------------------------
//
// 081107 Add UnUseGEM (then use the default channel of G4Evaporation)
//            UseFrag (chage criterion of a inelastic reaction)
// 090331 Change member shenXS and genspaXS object to pointer 
//

#ifndef G4QMDReaction_hh
#define G4QMDReaction_hh

#include "G4QMDSystem.hh"
#include "G4QMDCollision.hh"
#include "G4QMDMeanField.hh"
#include "G4QMDParticipant.hh"

#include "G4HadronicInteraction.hh"

#include "G4Evaporation.hh"
#include "G4ExcitationHandler.hh"

class G4VCrossSectionDataSet;
class G4BGGPionElasticXS;
class G4BGGPionInelasticXS;

class G4QMDReaction : public G4HadronicInteraction
{
  public:
    G4QMDReaction();
    ~G4QMDReaction() override;

    std::vector< G4QMDSystem* > GetFinalStates(); 

    G4HadFinalState* ApplyYourself(const G4HadProjectile &aTrack,
                                   G4Nucleus & targetNucleus) override;

    G4ExcitationHandler* GetExcitationHandler() {return excitationHandler;};

    void UnUseGEM() {gem = false; setEvaporationCh();};
    void UseFRAG() {frag = true;};

    void SetTMAX(G4int i) { maxTime = i; };
    void SetDT(G4double t) { deltaT = t; };
    void SetEF(G4double x) { envelopF = x; };

    void ModelDescription(std::ostream& outFile) const override;

    //copy is unexpected
    G4QMDReaction(const G4QMDReaction& right) = delete;
    const G4QMDReaction& operator = (const G4QMDReaction& right) = delete;

  private:

    void setEvaporationCh();
    void setHighEnergyModel();

    G4QMDMeanField* meanField;

    G4QMDCollision* collision;

    void doCollision();
    std::vector< G4QMDSystem* > doClusterJudgment();
      
    G4QMDSystem* system;
    G4double deltaT;
    G4int maxTime;
    G4double envelopF;

    G4ExcitationHandler* excitationHandler;

      //                            b        pd_proj                pd_targ                  z_p     a_p     z_t     a_t      plab       elab
//      G4double offSetOfCollision( G4double , G4ParticleDefinition* , G4ParticleDefinition* , G4int , G4int , G4int , G4int , G4double , G4double  );  
      //                           b          pd_proj                 pd_targ                 plab       elab      bmax boostToCM

    void calcOffSetOfCollision(G4double, const G4ParticleDefinition*,
                               const G4ParticleDefinition*, G4double,
                               G4double, G4double, G4ThreeVector);

    G4double coulomb_collision_gamma_proj;
    G4double coulomb_collision_rx_proj;
    G4double coulomb_collision_rz_proj;
    G4double coulomb_collision_px_proj;
    G4double coulomb_collision_pz_proj;

    G4double coulomb_collision_gamma_targ;
    G4double coulomb_collision_rx_targ;
    G4double coulomb_collision_rz_targ;
    G4double coulomb_collision_px_targ;
    G4double coulomb_collision_pz_targ;

    G4VCrossSectionDataSet* theXS;

    G4BGGPionElasticXS* pipElNucXS;
    G4BGGPionElasticXS* pimElNucXS;
    G4BGGPionInelasticXS* pipInelNucXS;
    G4BGGPionInelasticXS* pimInelNucXS;

    G4bool gem;
    G4bool frag;
    G4int secID;  // Creator model ID for the secondaries
};

#endif