:-module(term_table,
         [ bug/1,
           term/3,
           ci_term/4,
           plural/2,
           singular/2,
           find_term1/4,
           find_term/3,
           find_term_from_substring/3
         ]).

bug(R) :-
    compare_strings(aat_new, 'noot\u00e8one', 'noot\u00e8two', R).



:-dynamic stored_defs_handle/1.

user:file_search_path(foreign, Lib) :-
    feature(arch, Arch),
    concat('lib/', Arch, Lib).

:-use_module(library(table)).


:- initialization
    new_order_table(aat_new,
                    [ case_insensitive,
                      tag("("),
                      ignore("'`<>"),
                      break(" ,-:"),
                      32=95,        %map underscore to space
%                         45=95,
                      232=101,
                      233=101,
                      136=101       % OEM \^e --> e
                    ]).


find_database_file(DB,Type,File):-
    Path =.. [DB,'.'],
    absolute_file_name(Path,
                       [ file_type(directory),
                         access(read)
                       ],
                       AAT),
    ensure_slash(AAT, AATDir),
    atomic_list_concat([AATDir,DB,'_',Type, '.dat'], File).

ensure_slash(Name, Dir) :-
    concat(_, /, Name),
    !,
    Dir = Name.
ensure_slash(Name, Dir) :-
    concat(Name, /, Dir).


defs_table(Words):-
    stored_defs_handle(Words),
    !.
defs_table(Words):-
    %       find_database_file(aat,term,File),
    File = 'test.dat',
            new_table(File,
                      [  word(atom,[sorted(aat_new)]),
                         category(atom,[width(1)]),
                         index(integer,[width(8)])],
                      [ field_separator(0'!)],
                      Words),
            asserta(stored_defs_handle(Words)).


term(Word,Index,Category):-
    defs_table(DHandle),
    in_table(DHandle,
             [word(Word),
              category(Category),
              index(Index)],
              _RPos).


ci_term(Word,Term,Index,Category):-
    defs_table(DHandle),
    in_table(DHandle,
             [word(Word,=(aat_new)),
              category(Category),
              index(Index)],
              RPos),
    read_table_record(DHandle,RPos,_Next,
                      record(Term,_,_)).



find_term(Search_String,Term,Index):-
    defs_table(DHandle),
    in_table(DHandle,
             [word(Search_String,prefix(aat_new)),
                 index(Index)],
              _RPos),
    ident(Index,Term).

find_term_from_substring(Search_String,Term,Index):-
    defs_table(DHandle),
    in_table(DHandle,
             [word(Search_String,substring(aat_new)),
                 index(Index)],
              _RPos),
    ident(Index,Term).


find_term1(Search_String,Term,Index,Category):-
    defs_table(DHandle),
    in_table(DHandle,
             [word(Search_String,prefix(aat_new)),
              category(Category),
                 index(Index)],
              RPos),
%       ident(Index,Term),
    read_table_record(DHandle,RPos,_Next,
                      record(Term,_,_)).


plural(X,Y):-
    term(X,I,a),
    idterm(I,Y,m),
    !.

plural(X,Y):-
    term(X,I,q),
    find_term1(X,T1,I,a),
    idterm(I,Y,q),
    X \=Y,
    find_term1(Y,T2,I,m),
    T1 \= T2,
    !.

singular(X,Y):-
    term(X,I,m),
    idterm(I,Y,a),
    !.

singular(X,Y):-
    term(X,I,q),
    find_term1(X,T1,I,m),
    idterm(I,Y,q),
    X \=Y,
    find_term1(Y,T2,I,a),
    T1 \= T2,
    !.