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// G4CascadeParameters.hh
// Encapsulate all user-configurable parameters with associated envvars
//
// 20120912  M. Kelsey -- Add interface to support UI commands

#ifndef G4CascadeParameters_hh
#define G4CascadeParameters_hh 1

#include "globals.hh"
#include <iosfwd>

class G4CascadeParamMessenger;


class G4CascadeParameters {
public:
  static const G4CascadeParameters* Instance();		// Singleton
  ~G4CascadeParameters();

  // Top-level configuration flags
  static G4int verbose()              { return Instance()->VERBOSE_LEVEL; }
  static G4bool usePreCompound()      { return Instance()->USE_PRECOMPOUND; }
  static G4bool doCoalescence()       { return Instance()->DO_COALESCENCE; }
  static const G4String& randomFile() { return Instance()->RANDOM_FILE; }

  // Nuclear structure parameters
  static G4bool useTwoParam()      { return Instance()->TWOPARAM_RADIUS; }
  static G4double radiusScale()    { return Instance()->RADIUS_SCALE; }	
  static G4double radiusSmall()    { return Instance()->RADIUS_SMALL; }
  static G4double radiusAlpha()    { return Instance()->RADIUS_ALPHA; }
  static G4double radiusTrailing() { return Instance()->RADIUS_TRAILING; }
  static G4double fermiScale()     { return Instance()->FERMI_SCALE; }
  static G4double xsecScale()      { return Instance()->XSEC_SCALE; }
  static G4double gammaQDScale()   { return Instance()->GAMMAQD_SCALE; }

  // Final-state clustering cuts
  static G4double dpMaxDoublet() { return Instance()->DPMAX_DOUBLET; }
  static G4double dpMaxTriplet() { return Instance()->DPMAX_TRIPLET; }
  static G4double dpMaxAlpha()   { return Instance()->DPMAX_ALPHA; }

  static void DumpConfiguration(std::ostream& os) { Instance()->DumpConfig(os); }

private:	// Environment variable values, null pointers mean not set
  const char* G4CASCADE_VERBOSE;
  const char* G4CASCADE_USE_PRECOMPOUND;
  const char* G4CASCADE_DO_COALESCENCE;
  const char* G4CASCADE_RANDOM_FILE;
  const char* G4NUCMODEL_USE_BEST;
  const char* G4NUCMODEL_RAD_2PAR;
  const char* G4NUCMODEL_RAD_SCALE;
  const char* G4NUCMODEL_RAD_SMALL;
  const char* G4NUCMODEL_RAD_ALPHA;
  const char* G4NUCMODEL_RAD_TRAILING;
  const char* G4NUCMODEL_FERMI_SCALE;
  const char* G4NUCMODEL_XSEC_SCALE;
  const char* G4NUCMODEL_GAMMAQD;
  const char* DPMAX_2CLUSTER;
  const char* DPMAX_3CLUSTER;
  const char* DPMAX_4CLUSTER;

  void Initialize();		// Fill parameter values from envvar strings

  G4int VERBOSE_LEVEL;		// Top-level configuration flags
  G4bool USE_PRECOMPOUND;
  G4bool DO_COALESCENCE;
  G4String RANDOM_FILE;

  G4bool BEST_PAR;		// Nuclear structure parameters
  G4bool TWOPARAM_RADIUS;
  G4double RADIUS_SCALE;	
  G4double RADIUS_SMALL;
  G4double RADIUS_ALPHA;
  G4double RADIUS_TRAILING;
  G4double FERMI_SCALE;
  G4double XSEC_SCALE;
  G4double GAMMAQD_SCALE;

  G4double DPMAX_DOUBLET;	// Final-state clustering cuts
  G4double DPMAX_TRIPLET;
  G4double DPMAX_ALPHA;

private:	// Singleton -- no public constructor
  G4CascadeParameters();
  void DumpConfig(std::ostream& os) const;

  G4CascadeParamMessenger* messenger;		// For access via UI commands
  friend class G4CascadeParamMessenger;
};

#endif	/* G4CascadeParameters_hh */