// SLHAinterface.h is a part of the PYTHIA event generator.
// Copyright (C) 2026 Torbjorn Sjostrand.
// Main authors of this file: N. Desai, P. Skands
// PYTHIA is licenced under the GNU GPL v2 or later, see COPYING for details.
// Please respect the MCnet Guidelines, see GUIDELINES for details.

// Header file for SUSY Les Houches Accord Interface.
// Handles the communication between PYTHIA and the SusyLesHouches classes.

#ifndef Pythia8_SLHAinterface_H
#define Pythia8_SLHAinterface_H

#include "Pythia8/Basics.h"
#include "Pythia8/ParticleData.h"
#include "Pythia8/PythiaStdlib.h"
#include "Pythia8/Settings.h"
#include "Pythia8/StandardModel.h"
#include "Pythia8/SusyCouplings.h"

namespace Pythia8 {

//==========================================================================

// The SLHAinterface class handles communication between Pythia and
// SusyLesHouches.

class SLHAinterface {

public:

  // Constructor.
  SLHAinterface() : infoPtr(), settingsPtr(), particleDataPtr(),
    rndmPtr(), coupSMPtr(), coupSUSYPtr(), meMode() {}

  // Set pointers
  void setPtr( Info* infoPtrIn ) {infoPtr  = infoPtrIn;
    settingsPtr     = infoPtr->settingsPtr;
    particleDataPtr = infoPtr->particleDataPtr;
    rndmPtr         = infoPtr->rndmPtr;
    loggerPtr       = infoPtr->loggerPtr;
    coupSMPtr       = infoPtr->coupSMPtr;
    coupSUSYPtr     = infoPtr->coupSUSYPtr;
}

  // Initialize and switch to SUSY couplings if reading SLHA spectrum
  void init( bool& useSHLAcouplings, stringstream& ParticleDataBuffer );

  // Initialize SUSY Les Houches Accord data.
  bool initSLHA();

  // Initialize SLHA blocks SMINPUTS and MASS from PYTHIA SM parameter values.
  // E.g., to make sure that there are no important unfilled entries
  void pythia2slha();

  // SusyLesHouches - SLHA object for interface to SUSY spectra.
  SusyLesHouches slha;

  // Pointers to PYTHIA objects
  Info*                infoPtr;
  Settings*            settingsPtr;
  ParticleData*        particleDataPtr;
  Rndm*                rndmPtr;
  Logger*              loggerPtr;

  // SM couplings and SLHA derived couplings class.
  CoupSM*              coupSMPtr;
  CoupSUSY*            coupSUSYPtr;

  // Internal data members
  int                  meMode;

};

//==========================================================================

} // end namespace Pythia8

#endif // Pythia8_SLHAinterface_H
