:- dynamic fact/3 .

% "create" (this module generates characters and data in SMASS)



make_characters(AS,L) :- build_up_characters(AS,L), export_results(AS).

build_up_characters(AS,L) :- length(L,E),
  ( between(1,E,X), make_distribution(X,L,E,AS), fail ; true ),
  ( between(1,AS,A), collect_characters(L,E,A), fail ; true),    
  retractall(dd_expr(M1,M2,M3)), !. 
 
make_distribution(X,L,E,AS) :- nth1(X,L,M), weights(M,EX,LIST),
  make_discrete_distribution(M,AS,EX,LIST), !.

collect_characters(L,E,A) :- asserta(character(A,[])),
  ( between(1,E,X), nth1(X,L,M), add_character(M,A), fail; true ),!.

add_character(M,A) :- dd_expr(M,A,C), character(A,L1), append(L1,[C],L2),
  retract(character(A,L1)), asserta(character(A,L2)),!.

export_results(AS) :- ( between(1,AS,A), export_res(A), fail; true),!.

export_res(A) :- character(A,L2), calculate_sum(L2,SUM), 
  append(data),
  write(fact(0,0,character(A,L2,SUM))), write('.'), nl,  told,
  retract(character(A,L2)),!.


% ---------------------------------------------------------------------------------

make(wealth_dono) :- actors(AS), domain_of_wealth_dono(L,U),
   sigma_wealth_dono(SI), normal_distribution(wealth_dono,AS,L,U,SI),
   (   between(1,AS,A), nd_expr(wealth_dono,A,W), append(data),
       write(fact(0,0,wealth_dono(A,W))), write('.'), nl, told,
       retract(nd_expr(wealth_dono,A,W)), fail 
   ; true 
   ),!.

make(wealth_take) :- actors(AS), domain_of_wealth_take(L,U),
    sigma_wealth_take(SI), normal_distribution(wealth_take,AS,L,U,SI),
    (  between(1,AS,A), nd_expr(wealth_take,A,W), append(data),
       write(fact(0,0,wealth_take(A,W))), write('.'), nl, told,  
       retract(nd_expr(wealth_take,A,W)), fail 
    ; true 
    ),!.         

make(strength) :- actors(AS), weights(strength,LIST),              
   expressions(strength,EX),
   make_discrete_distribution(strength,AS,EX,LIST),
   (  between(1,AS,A), dd_expr(strength,A,W), append(data),
      write(fact(0,0,strength(A,W))), write('.'), nl, told,  
      retract(dd_expr(strength,A,W)), fail
   ; true 
   ),!. 
         
make(location) :- actors(AS), gridwidth(G), G1 is G*G,    
   findall(X,between(1,G1,X), L), asserta(cell_list(L)),         
   ( between(1,AS,A), locate(A), fail ; true), 
   retractall(cell_list(L2)),!.

locate(A) :- cell_list(L), length(L,E), X is random(E)+1, nth1(X,L,Y),
  gridwidth(G), decompose(Y,I,J,G), 
  append(data), write(fact(0,0,location(A,I,J))), write('.'), nl, told,
  asserta(int_loc(A,I,J)),
  delete(L,Y,L1),
  retract(cell_list(L)), asserta(cell_list(L1)),!.

make(colour) :- actors(AS),
  ( between(1,AS,A), set_colour(A), fail ; true),!.

set_colour(A) :- 
  int_loc(A,I,J),
  N is I+J,
  N1 is N mod 2, append(data),
  (   N1 =:= 0, write(fact(0,0,colour(A,white))), write('.'), nl
  ;     
     write(fact(0,0,colour(A,black))), write('.'), nl
  ), told, nl, !.