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:- module(agent, [init, look/0, move/1, take/1]).
:- consult('parser.prolog').
:- consult('map.prolog').
% initialisation
init :-
retractall(here(_)),
asserta(here(a)), !.
% command functions
look :-
here(L),
writeSenses(L),
writeExits(L).
move(D) :-
here(L),
connects(L,N,D),
retract(here(L)),
asserta(here(N)),
join(['You move to the ',D,' .\n\n'],M),
write(M), !.
take(T) :-
here(L),
itemAt(T,L),
canTake(T),
retract(itemAt(T,L)),
asserta(holding(T)),
write('Taken.\n\n'), !.
% letting the player know what's going on
writeSenses(L) :-
glitter(L),
breeze(L),
bats(L),
stench(L).
glitter(L) :-
goldAt(L),
write('You see a glitter along the sandy floor of the cave.\n').
breeze(L) :-
connects(L,X,_),
pitAt(X),
write('A cold breeze blows through the room, making you shiver slightly.\n').
bats(L) :-
connects(L,X,_),
batsAt(X),
write('All available surfaces are covered in guano. How unsanitary.\n').
stench(L) :-
connects(L,X,_),
wumpusAt(X),
write('An overpowering stench fills your nose.\n').
writeExits(L) :-
findall(X, connects(L,_,X), E),
intercalate(E, ', ', O),
join(['There are exits to the ',O,'.\n'],W),
write(W).
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