/**
 * @file
 */
/* 
A* -------------------------------------------------------------------
B* This file contains source code for the PyMOL computer program
C* copyright 1998-2000 by Warren Lyford Delano of DeLano Scientific. 
D* -------------------------------------------------------------------
E* It is unlawful to modify or remove this copyright notice.
F* -------------------------------------------------------------------
G* Please see the accompanying LICENSE file for further information. 
H* -------------------------------------------------------------------
I* Additional authors of this source file include:
-* 
-* 
-*
Z* -------------------------------------------------------------------
*/
#ifndef _H_AtomInfo
#define _H_AtomInfo

#include"Rep.h"
#include"Setting.h"
#include"SymOp.h"
#include"Version.h"

#if _PyMOL_VERSION_int < 1770
#define AtomInfoVERSION  176
#define BondInfoVERSION  176
#elif _PyMOL_VERSION_int < 1810
#define AtomInfoVERSION  177
#define BondInfoVERSION  177
#else
#define AtomInfoVERSION  181
#define BondInfoVERSION  181
#endif

enum {
  cAtomProtected_off = 0,
  cAtomProtected_explicit = 1,
  cAtomProtected_drag = 2,
};

/* FLAGS 0-3 have the following conventional usage for molecular modeling */


/* FLAG 0 - Atoms of interest - i.e. a ligand in an active site */
#define cAtomFlag_focus         0x00000001


/* FLAG 1 - Free atoms - those which can move subject to a force-field */
#define cAtomFlag_free          0x00000002


/* FLAG 2 - Restrained atoms - atoms subject to a harmonic restraint */
#define cAtomFlag_restrain      0x00000004


/* FLAG 3 - Fixed atoms - no movement allowed */
#define cAtomFlag_fix           0x00000008


/* FLAG 4 - Exclude these atoms when performing simulation, minimization */
#define cAtomFlag_exclude       0x00000010


/* FLAG 5 - Study atoms  */
#define cAtomFlag_study         0x00000020


/* FLAGS 6-7 are for polymer sub-classification */
#define cAtomFlag_protein       0x00000040
#define cAtomFlag_nucleic       0x00000080


/* FLAGS 8-15 are free for end users to manipulate */


/* FLAGS 16-21 are reserved for external GUIs and linked applications */


/* FLAGS 22-23 are for temporary use only (inside of self-contained loops) */


/* FLAGS 24-31 are reserved for PyMOL's internal use */


/* FLAG 24 - don't surface these atoms (waters, ligands, etc.) */
// DEPRECATED (PYMOL-3500): Instead of `flag exfoliate, sele`, use `hide
// surface, sele` or some equivalent command.
#define cAtomFlag_exfoliate     0x01000000


/* FLAG 25 - ignore atoms altogether when surfacing */
#define cAtomFlag_ignore        0x02000000


/* FLAG 26 - disable cartoon smoothing for these atoms */
#define cAtomFlag_no_smooth     0x04000000


/* FLAG 27 - polymer */
#define cAtomFlag_polymer       0x08000000

/* FLAG 28 - waters */
#define cAtomFlag_solvent       0x10000000

/* FLAG 29 - organics */
#define cAtomFlag_organic       0x20000000

/* FLAG 30 - inorganics */
#define cAtomFlag_inorganic     0x40000000


/* FLAG 31 - guide atom: e.g. CA in proteins */
#define cAtomFlag_guide         0x80000000

#define cAtomFlag_class         0xF8000000
#define cAtomFlag_class_mask    0x07FFFFFF

#define cResnLen 5
#define cResiLen 5
#define cAtomNameLen 4
#define cElemNameLen 4
#define cSegiLen 4
#define cTextTypeLen 20
#define cLabelTypeLen 20

#define cAtomInfoTetrahedral 4
#define cAtomInfoPlanar 3
#define cAtomInfoLinear 2
#define cAtomInfoSingle 1
#define cAtomInfoNone 5

#define cAN_LP  0
#define cAN_H   1
#define cAN_He  2
#define cAN_Li  3
#define cAN_Be  4
#define cAN_B   5
#define cAN_C   6
#define cAN_N   7
#define cAN_O   8
#define cAN_F   9
#define cAN_Ne 10
#define cAN_Na 11
#define cAN_Mg 12
#define cAN_Al 13
#define cAN_Si 14
#define cAN_P  15
#define cAN_S  16
#define cAN_Cl 17
#define cAN_Ar 18
#define cAN_K  19
#define cAN_Ca 20

#define cAN_Ti 22
#define cAN_V  23

#define cAN_Cr 24
#define cAN_Mn 25
#define cAN_Fe 26
#define cAN_Co 27
#define cAN_Ni 28
#define cAN_Cu 29
#define cAN_Zn 30
#define cAN_Ga 31
#define cAN_Ge 32
#define cAN_As 33
#define cAN_Se 34
#define cAN_Br 35
#define cAN_Kr 36

#define cAN_Rb 37
#define cAN_Sr 38
#define cAN_Y  39

#define cAN_Pd 46
#define cAN_Ag 47
#define cAN_Cd 48
#define cAN_In 49
#define cAN_Sn 50
#define cAN_Sb 51
#define cAN_Te 52
#define cAN_I  53
#define cAN_Xe 54
#define cAN_Cs 55
#define cAN_Ba 56

#define cAN_Ce 58

#define cAN_Pt 78
#define cAN_Au 79
#define cAN_Hg 80
#define cAN_Tl 81
#define cAN_Pb 82

#define cAN_U  92

#define SDF_CHIRALITY_ODD    1          // odd  / clockwise
#define SDF_CHIRALITY_EVEN   2          // even / counterclockwise
#define SDF_CHIRALITY_EITHER 3          // either or unmarked

typedef char Chain[2];
typedef char SSType[2];
typedef char SegIdent[cSegiLen + 1];
typedef char ResIdent[cResiLen + 1];
typedef char ResName[cResnLen + 1];
typedef char AtomName[cAtomNameLen + 1];

typedef char ElemName[cElemNameLen + 1];

// for customType (not geom)
#define cAtomInfoNoType -9999

#define cBondOrderDeloc 4

inline char makeInscode(char c) {
  return (c <= ' ') ? '\0' : c;
}

struct ElementTableItemType {
  const char * name;
  const char * symbol;
  float vdw;
  float weight;
};

extern const ElementTableItemType ElementTable[];
extern const int ElementTableSize;

typedef struct BondType {
  int index[2];
  int unique_id;

  /// Symmetry operation of the second atom. The implicit symmetry for the first
  /// atom is 1_555. (We assume that there is no use case for `symop_1 != 1_555
  /// && symop_2 != 1_555`).
  pymol::SymOp symop_2;

  signed char order;    // 0-4
  bool has_setting;     /* setting based on unique_id */

  /// True if this is a bond to a symmetry mate
  bool hasSymOp() const;
} BondType;

typedef struct AtomInfoType {
  float * anisou;               // only allocate with get_anisou

  lexidx_t segi;
  lexidx_t chain;
  lexidx_t resn;
  lexidx_t name;
  lexidx_t textType;
  lexidx_t custom;
  lexidx_t label;

  int resv;
  int customType;
  int priority;
  float b, q, vdw, partialCharge;

  SelectorMemberOffset_t selEntry;

  int color;
  int id;                       // PDB ID
  unsigned int flags;
  int temp1;                    /* kludge fields - to remove */
  int unique_id;                /* introduced in version 0.77 */
  StateIndexPython_t discrete_state; ///< state+1 for atoms in discrete objects
  float elec_radius;            /* radius for PB calculations */
  int rank;
  int visRep;                   /* bitmask for all reps */

#ifdef _PYMOL_IP_EXTRAS
  int prop_id;
#endif

  // boolean flags
  bool hetatm : 1;
  bool bonded : 1;
  bool deleteFlag : 1;
  bool masked : 1;
  bool hb_donor : 1;
  bool hb_acceptor : 1;
  bool has_setting : 1;      /* setting based on unique_id */

  /* be careful not to write at these as (int*) */

  signed char formalCharge;     // values typically in range -2..+2
  signed char cartoon;          /* 0 = default which is auto (use ssType) */
  signed char geom;             // cAtomInfo*

  // "valence" should be renamed to "degree" (or "total_degree"). It's the
  // number of explicit and implicit neighbors, independent of bond order.
  // Should be equivalent to RDKit::Atom::getTotalDegree() and
  // OBAtom::GetTotalDegree().
  signed char valence;          // 0-4
  signed char protons;          /* atomic number */

  char inscode;

  ElemName elem;               // redundant with "protons" ?
  SSType ssType;               /* blank or 'L' = turn/loop, 'H' = helix, 'S' = beta-strand/sheet */
  Chain alt;

  // small value optimized bitfields
  unsigned char stereo : 2;     // 0-3 Only for SDF (MOL) format in/out
  unsigned char chemFlag : 2;   // 0,1,2
  unsigned char protekted : 2;  // 0,1,2
  unsigned char mmstereo : 2;   // 0/R/S/?

  // methods
  bool isHydrogen() const {
    return protons == cAN_H;
  }

  bool isMetal() const {
    return (
        (protons >  2 && protons <  5) ||
        (protons > 10 && protons < 14) ||
        (protons > 18 && protons < 32) ||
        (protons > 36 && protons < 51) ||
        (protons > 54 && protons < 85) ||
        protons > 86);
  }

  char getInscode(bool space=false) const {
    if (space && !inscode)
      return ' ';
    return inscode;
  }

  void setInscode(char c) {
    inscode = makeInscode(c);
  }

  void setResi(const char * resi) {
    if (sscanf(resi, "%d%c", &resv, &inscode) == 1 || inscode <= ' ')
      inscode = '\0';
  }

  // for AtomInfoHistory
  void setResi(int resv_, char inscode_) {
    resv = resv_;
    setInscode(inscode_);
  }

  /*
   * Return true if any representation, which is displayable by this
   * atom, is shown
   */
  bool isVisible() const {
    if(visRep & (
          // point reps
          cRepSphereBit | cRepEllipsoidBit | cRepLabelBit |
          // surface reps
          cRepSurfaceBit | cRepDotBit | cRepMeshBit |
          // polymer reps (actually only shown for guide atoms or if
          // *_trace_atoms=1 or cartoon_ring_finder=4)
          cRepCartoonBit | cRepRibbonBit)) {
      return true;
    } else if(bonded) {
      // bond reps
      if (visRep & (cRepCylBit | cRepLineBit))
        return true;
    } else {
      // nonbonded reps
      if (visRep & (cRepNonbondedSphereBit | cRepNonbondedBit))
        return true;
    }
    return false;
  }

  // get the anisou array, allocate if null
  float * get_anisou() { return (anisou ? anisou : (anisou = new float[6])); }

  // read-only anisou access, no allocation
  const float * get_anisou() const { return anisou; }
  bool has_anisou() const { return anisou; }
} AtomInfoType;

void AtomInfoFree(PyMOLGlobals * G);
int AtomInfoInit(PyMOLGlobals * G);
void BondTypeInit(BondType *bt);
void BondTypeInit2(BondType *bt, int i1, int i2, int order = 1);
void AtomInfoPurge(PyMOLGlobals * G, AtomInfoType * ai);
void AtomInfoCopy(PyMOLGlobals * G, const AtomInfoType * src, AtomInfoType * dst, int copy_properties=true);
int AtomInfoReserveUniqueID(PyMOLGlobals * G, int unique_id);
int AtomInfoIsUniqueIDActive(PyMOLGlobals * G, int unique_id);
int AtomInfoGetNewUniqueID(PyMOLGlobals * G);
void AtomInfoCleanAtomName(char *name);

#ifndef _PYMOL_NOPY
int AtomInfoSetSettingFromPyObject(PyMOLGlobals * G, AtomInfoType *ai, int setting_id, PyObject *val);
#endif
PyObject *SettingGetIfDefinedPyObject(PyMOLGlobals * G, AtomInfoType * ai, int setting_id);

void AtomInfoBondCopy(PyMOLGlobals * G, const BondType * src, BondType * dst);

int AtomInfoCheckUniqueID(PyMOLGlobals * G, AtomInfoType * ai);
void AtomInfoAssignParameters(PyMOLGlobals * G, AtomInfoType * I);
void AtomInfoFreeSortedIndexes(PyMOLGlobals * G, int **index, int **outdex);
void AtomInfoPrimeColors(PyMOLGlobals * G);
void AtomInfoAssignColors(PyMOLGlobals * G, AtomInfoType * at1);
int AtomInfoGetColor(PyMOLGlobals * G, const AtomInfoType * at1);
int AtomInfoGetExpectedValence(PyMOLGlobals * G, const AtomInfoType * I);
int AtomInfoIsFreeCation(PyMOLGlobals * G, const AtomInfoType * I);
PyObject *AtomInfoAsPyList(PyMOLGlobals * G, const AtomInfoType * at);
int AtomInfoFromPyList(PyMOLGlobals * G, AtomInfoType * at, PyObject * list);

int AtomInfoMatch(PyMOLGlobals * G, const AtomInfoType * at1, const AtomInfoType * at2, bool, bool);
int AtomInfoCompare(PyMOLGlobals * G, const AtomInfoType * at1, const AtomInfoType * at2);
int AtomInfoCompareIgnoreRank(PyMOLGlobals * G, const AtomInfoType * at1, const AtomInfoType * at2);
int AtomInfoCompareIgnoreHet(PyMOLGlobals * G, const AtomInfoType * at1, const AtomInfoType * at2);
int AtomInfoCompareIgnoreRankHet(PyMOLGlobals * G, const AtomInfoType * at1,
                                 const AtomInfoType * at2);
float AtomInfoGetBondLength(PyMOLGlobals * G, const AtomInfoType * ai1, const AtomInfoType * ai2);
int AtomInfoSameResidue(PyMOLGlobals * G, const AtomInfoType * at1, const AtomInfoType * at2);
int AtomInfoSameResidueP(PyMOLGlobals * G, const AtomInfoType * at1, const AtomInfoType * at2);
int AtomInfoSameChainP(PyMOLGlobals * G, const AtomInfoType * at1, const AtomInfoType * at2);
int AtomInfoSameSegmentP(PyMOLGlobals * G, const AtomInfoType * at1, const AtomInfoType * at2);
int AtomInfoSequential(PyMOLGlobals * G, const AtomInfoType * at1, const AtomInfoType * at2,
                       int mode);

#define AtomInfoCheckUniqueBondID AtomInfoCheckUniqueID
int AtomInfoCheckUniqueBondID(PyMOLGlobals * G, BondType * bi);
void AtomInfoPurgeBond(PyMOLGlobals * G, BondType * bi);

void AtomInfoBracketResidue(PyMOLGlobals * G, const AtomInfoType * ai0, int n0,
                            const AtomInfoType * ai, int *st, int *nd);
void AtomInfoBracketResidueFast(PyMOLGlobals * G, const AtomInfoType * ai0, int n0, int cur,
                                int *st, int *nd);

int AtomInfoUniquefyNames(PyMOLGlobals * G, const AtomInfoType * atInfo0, int n0,
                          AtomInfoType * atInfo1, int *flag1, int n1,
                          const ObjectMolecule* mol = nullptr);
int AtomInfoUniquefyNames(
    const ObjectMolecule* mol, AtomInfoType* atoms, size_t natoms);

bool AtomResiFromResv(char *resi, size_t size, int resv, char inscode);
inline bool AtomResiFromResv(char *resi, size_t size, const AtomInfoType * ai) {
  return AtomResiFromResv(resi, size, ai->resv, ai->inscode);
}

int AtomInfoKnownWaterResName(PyMOLGlobals * G, const char *resn);
int AtomInfoKnownPolymerResName(const char *resn);
int AtomInfoKnownProteinResName(const char *resn);
int AtomInfoKnownNucleicResName(const char *resn);
void AtomInfoGetPDB3LetHydroName(PyMOLGlobals * G, const char *resn, const char *iname, char *oname);

#define cAIC_ct        0x0001
#define cAIC_fc        0x0002
#define cAIC_pc        0x0004
#define cAIC_b         0x0008
#define cAIC_q         0x0010
#define cAIC_id        0x0020
#define cAIC_flags     0x0080
#define cAIC_tt        0x0100
#define cAIC_state     0x0200
#define cAIC_rank      0x0400
#define cAIC_custom    0x0800

#define cAIC_IDMask (cAIC_id|cAIC_rank)
#define cAIC_PDBMask (cAIC_b|cAIC_q|cAIC_id|cAIC_rank)
#define cAIC_MMDMask (cAIC_pc|cAIC_ct|cAIC_id|cAIC_rank)
#define cAIC_MOLMask (cAIC_fc|cAIC_id|cAIC_rank)
#define cAIC_AllMask 0xFFFF

void AtomInfoCombine(PyMOLGlobals * G, AtomInfoType * dst, AtomInfoType&& src, int mask);
int AtomInfoNameOrder(PyMOLGlobals * G, const AtomInfoType * at1, const AtomInfoType * at2);
int AtomInfoUpdateAutoColor(PyMOLGlobals * G);

typedef struct {
  int resv1, resv2;
  char inscode1, inscode2;
  unsigned char chain1, chain2;
  unsigned char type;
  int next;
} SSEntry;

void atomicnumber2elem(char * dst, int protons);

/*
 * atom-level and bond-level settings
 */

template <typename T>
int AtomInfoCheckSetting(PyMOLGlobals * G, T * item, int index) {
  return (item->has_setting && SettingUniqueCheck(G, item->unique_id, index));
}

#define AtomInfoCheckBondSetting AtomInfoCheckSetting

template <typename V, typename T> void SettingSet(PyMOLGlobals * G, int index, V value, T * ai) {
  AtomInfoCheckUniqueID(G, ai);
  ai->has_setting = true;
  SettingUniqueSet(G, ai->unique_id, index, value);
}

/**
 * Return true if `item` has the requested setting defined and the
 * value could be assigned to `out`.
 */
template <typename V, typename T>
bool AtomSettingGetIfDefined(PyMOLGlobals * G, T * item, int index, V * out) {
  return item->has_setting &&
    SettingUniqueGetIfDefined<V>(G, item->unique_id, index, out);
}

/**
 * Return the `item`-level setting value or `default_`, if `index` is not
 * defined for `item`.
 */
template <typename V, typename T>
V AtomSettingGetWD(PyMOLGlobals * G, T * item, int index, V default_) {
  V out;
  if (AtomSettingGetIfDefined<V, T>(G, item, index, &out))
    return out;
  return default_;
}

#define BondSettingGetWD AtomSettingGetWD

// stereochemistry
const char * AtomInfoGetStereoAsStr(const AtomInfoType * ai);
void AtomInfoSetStereo(AtomInfoType * ai, const char * stereo);


void AtomInfoGetAlignedPDBResidueName(PyMOLGlobals * G,
    const AtomInfoType * ai,
    ResName & resn);
void AtomInfoGetAlignedPDBAtomName(PyMOLGlobals * G,
    const AtomInfoType * ai,
    const ResName & resn,
    AtomName & name);

#endif