#ifndef __AGROUP_HH__
#define __AGROUP_HH__

#include "AAtom.hh"
class AChain;

class AGroup
{
public:
  
  //--- Constructor ---
  virtual AGroup *newGroup(      char  resChar,int serial) = 0;
  virtual AGroup *newGroup(const char *residue,int serial) = 0;

  //--- Destructors ---
  virtual ~AGroup() { ; }

  //--- Access to the next group ---
  virtual AGroup *getNext()             = 0;
  virtual bool   setNext(AGroup *group) = 0; // Not recommended for use

  //--- Access to atoms in the group ---
  virtual AAtom *getFirstAtom()  = 0;
  virtual AAtom *getCAAtom()     = 0;
  virtual AAtom *getCBAtom()     = 0;
  virtual AAtom *getPSugarAtom() = 0;
  virtual AAtom *getMainAtom()   = 0; // CA for protein, P-sugar -- for nucleo

  //--- Access to the chain which group belongs to ---
  virtual AChain *getChain() = 0;

  //--- Group description index number ---
  virtual short getRefno() = 0;

  //--- Group serial number in the chain ---
  virtual int getSerialNum() = 0;

  //--- Group count number in the chain ---
  virtual int getCountNum() = 0;

  //--- Manipulations with atoms ---
  virtual bool addAtom(AAtom* atom)    = 0; // Appends atoms
  virtual bool deleteAtom(AAtom* atom) = 0;
  virtual bool hasAtom(AAtom* atom)    = 0;

  //--- Access to the type of group ---
  virtual bool isAmino()       = 0;
  virtual bool isNucleo()      = 0;
  virtual bool isAminoNucleo() = 0;
  virtual bool isProtein()     = 0;
  virtual bool isDNA()         = 0;
  virtual bool isSolvent()     = 0;
  virtual bool isWater()       = 0;
  virtual bool isIon()         = 0;
  virtual bool isPyrimidine()  = 0;
  virtual bool isPurine()      = 0;
  virtual bool isCoenzyme()    = 0;

  //--- Selection status ---
  virtual void selectAllAtoms()   = 0;
  virtual void unselectAllAtoms() = 0;
  virtual bool hasSelected()      = 0;

  //--- Temporary selection status ---
  virtual void tmpSelAllAtoms()   = 0;
  virtual void tmpUnselAllAtoms() = 0;
  virtual bool hasTmpSel()        = 0;

  //--- Character of the group  ---
  virtual char        getNameChar()   = 0;
  virtual std::string getNameString() = 0;

  //--- Counting number of atoms ---
  virtual int countAtoms() = 0;

  //--- Calculating number of contact ---
  virtual int countContactsWith(AGroup *group)  = 0;

  //--- Access to the type of residue ---
  virtual bool isAla() = 0;
  virtual bool isLeu() = 0;
  virtual bool isVal() = 0;
  virtual bool isLys() = 0;
  virtual bool isIle() = 0;
  virtual bool isGlu() = 0;
  virtual bool isArg() = 0;
  virtual bool isGln() = 0;
  virtual bool isHis() = 0;
  virtual bool isMet() = 0;
  virtual bool isGly() = 0;
  virtual bool isSer() = 0;
  virtual bool isThr() = 0;
  virtual bool isAsp() = 0;
  virtual bool isAsn() = 0;
  virtual bool isPro() = 0;
  virtual bool isPhe() = 0;
  virtual bool isTyr() = 0;
  virtual bool isCys() = 0;
  virtual bool isTrp() = 0;
  virtual bool isAsx() = 0;
  virtual bool isGlx() = 0;
  virtual bool isPca() = 0;
  virtual bool isHyp() = 0;
  virtual bool isCytosine() = 0;
  virtual bool isThymine()  = 0;
  virtual bool isAdenine()  = 0;
  virtual bool isGuanine()  = 0;

  //--- (Secondary) Structure flag ---
  virtual void deleteStrAssignment() = 0;
  virtual void setHelix3()           = 0; 
  virtual void setHelix4()           = 0;
  virtual void setHelix5()           = 0;
  virtual void setSheet()            = 0;
  virtual void setTurn()             = 0;
  virtual bool isHelix()             = 0;
  virtual bool isSheet()             = 0;
  virtual bool isTurn()              = 0;
};

#endif