% FILE:  tribondv2.pro

% IMPORT COMPARISONS CODE
:- consult('comparisons.pro').

% TRIBOND SOLVER
tribond(A,B,C,CommonThing,Solution) :- 
   simple_pure_tribond(A,B,C,CommonThing,Solution).
tribond(A,B,C,CommonThing,Solution) :- 
   simple_mixed_tribond(A,B,C,CommonThing,Solution).

% SIMPLE PURE TRIBOND SOLVER
simple_pure_tribond(A,B,C,CommonThing,Solution) :- 
   simple_pure_isa_tribond(A,B,C,CommonThing,Solution).
simple_pure_tribond(A,B,C,CommonThing,Solution) :- 
   simple_pure_has_tribond(A,B,C,CommonThing,Solution).
simple_pure_tribond(A,B,C,CommonThing,Solution) :- 
   simple_pure_vip_tribond(A,B,C,CommonThing,Solution).

% SIMPLE PURE ISA TRIBOND SOLVER

simple_pure_isa_tribond(X,Y,Z,CC,Solution) :- 
   isa(X,CC),
   isa(Y,CC),
   isa(Z,CC),
   Solution = tribond(isa(X,CC),isa(Y,CC),isa(Z,CC)).

% SIMPLE PURE HAS TRIBOND SOLVER

simple_pure_has_tribond(X,Y,Z,CC,Solution) :- 
   has(X,CC),
   has(Y,CC),
   has(Z,CC),
   Solution = tribond(has(X,CC),has(Y,CC),has(Z,CC)).

% SIMPLE PURE VIP TRIBOND SOLVER

simple_pure_vip_tribond(X,Y,Z,CC,Solution) :- 
   vip(X,CC),
   vip(Y,CC),
   vip(Z,CC),
   Solution = tribond(vip(X,CC),vip(Y,CC),vip(Z,CC)).

% SIMPLE MIXED TRIBOND SOLVER

simple_mixed_tribond(X,Y,Z,CC,Solution) :- 
   isa(X,CC),has(Y,CC),vip(Z,CC),
   Solution = tribond(isa(X,CC),has(Y,CC),vip(Z,CC)).
simple_mixed_tribond(X,Y,Z,CC,Solution) :- 
   isa(X,CC),vip(Y,CC),has(Z,CC),
   Solution = tribond(isa(X,CC),vip(Y,CC),has(Z,CC)).
simple_mixed_tribond(X,Y,Z,CC,Solution) :- 
   has(X,CC),isa(Y,CC),vip(Z,CC),
   Solution = tribond(has(X,CC),isa(Y,CC),vip(Z,CC)).
simple_mixed_tribond(X,Y,Z,CC,Solution) :- 
   has(X,CC),vip(Y,CC),isa(Z,CC),
   Solution = tribond(has(X,CC),vip(Y,CC),isa(Z,CC)).
simple_mixed_tribond(X,Y,Z,CC,Solution) :- 
   vip(X,CC),isa(Y,CC),has(Z,CC),
   Solution = tribond(vip(X,CC),isa(Y,CC),has(Z,CC)).
simple_mixed_tribond(X,Y,Z,CC,Solution) :- 
   vip(X,CC),has(Y,CC),isa(Z,CC),
   Solution = tribond(vip(X,CC),has(Y,CC),isa(Z,CC)).

% FIND ALL PROBLEMS
problems :-
   concepts(SC1,SC2,SC3),
   distinct(SC1,SC2,SC3),
   ordered(SC1,SC2,SC3),
   write(problem(SC1,SC2,SC3)),nl,
   fail.
problems.

% FIND ALL TRIBONDS
tribonds :-
   concepts(SC1,SC2,SC3),
   distinct(SC1,SC2,SC3),
   ordered(SC1,SC2,SC3),
   tribond(SC1,SC2,SC3,_,Solution),
   write(Solution),nl,
   fail.
tribonds.

concepts(A,B,C) :-
   concept(A),concept(B),concept(C).

distinct(A,B,C) :-
   not(A=B),not(A=C),not(B=C).

ordered(A,B,C) :-
   aless(A,B),aless(B,C).