%% @file yapi.yap
%% @brief support yap shell
%%

 :- module(yapi, [
 		 python_ouput/0,
 		 show_answer/2,
 		 show_answer/3,
 		 yap_query/4,
 		 python_query/2,
 		 python_query/3,
 		 python_import/1,
 		 yapi_query/2
		 ]).

%:- yap_flag(verbose, silent).

 :- reexport(library(python)).

:- use_module( library(lists) ).
:- use_module( library(maplist) ).
:- use_module( library(rbtrees) ).
:- use_module( library(terms) ).
 

:- python_import(yap4py.yapi).
:- python_import(json).
%:- python_import(gc).

:- meta_predicate( yapi_query(:,+) ).

%:- start_low_level_trace.

%% @pred yapi_query( + VarList, - Dictionary)
%%
%% dictionary, Examples
%%
%%
yapi_query( VarNames, Self ) :-
		show_answer(VarNames, Dict),
		Self.bindings := Dict.


%:- initialization set_preds.

set_preds :-
fail,
 	current_predicate(P, Q),
 	functor(Q,P,A),
	atom_string(P,S),
	catch(
	      := yap4py.yapi.named( S, A),
	      _,
	      fail),
	fail.
set_preds :-
fail,
	system_predicate(P/A),
	atom_string(P,S),
	catch(
	      := yap4py.yapi.named( S, A),
	      _,
	      fail),
	fail.
set_preds.

argi(N,I,I1) :-
    atomic_concat('A',I,N),
	I1 is I+1.

python_query( Caller, String		) :-
	      python_query( Caller, String, _Bindings).

python_query( Caller, String, Bindings ) :-
	atomic_to_term( String, Goal, VarNames ),
	query_to_answer( Goal, VarNames, Status, Bindings),
	Caller.port := Status,
	       output(Caller, Bindings).

output( Caller, Bindings ) :-
    Caller.answer := {},
 /*  % start_low_level_trace,
    foldl(ground_dict(answer), Bindings, [], Ts),
    term_variables( Ts, Hidden),
    foldl(bv, Hidden , 0, _),
  */  maplist(into_dict(answer),Bindings),
  := print(answer)},
    Caller.answer := answer.
    
output( _, Bindings ) :-
    write_query_answer( Bindings ),
    fail.
output(_Caller, _Bindings).
    
bv(V,I,I1) :-
    atomic_concat(['__',I],V),
    I1 is I+1.

into_dict(D,V0=T) :-
    atom(T),
    !,
    D[V0] := T.
into_dict(D,V0=T) :-
  integer(T),
writeln((D[V0]:=T)),
!,
    D[V0] := T,
    := print(D).
into_dict(D,V0=T) :-
    string(T),
    !,
    D[V0] := T.
into_dict(D,V0=T) :-
    python_represents(T1,T),
    D[V0] := T1.
    
/**
 *
 */
ground_dict(_Dict,var([_V]), I, I) :-
    !.
ground_dict(_Dict,var([V,V]), I, I) :- 
    !.
ground_dict(Dict, nonvar([V0|Vs],T),I0, [V0=T| I0]) :-
    !,
    ground_dict(Dict, var([V0|Vs]),I0, I0).
ground_dict(Dict, var([V0,V1|Vs]), I, I) :- 
    !,
		Dict[V1] := V0,
		ground_dict(Dict, var([V0|Vs]), I, I).