-module(rps).
-export([
    go/0,
    lobby/0, counter/0, printer/0]).
-define(BOTS, [fool, copycat, gambler]).
go() ->
    register(lobby, spawn_link(?MODULE, lobby, [])),
    register(counter, spawn_link(?MODULE, counter, [])),
    register(printer, spawn_link(?MODULE, printer, [])),
    [spawn_link(rps_bots, Bot, []) || Bot <- ?BOTS].
lobby() ->
    lobby([]).
lobby(Players) when length(Players) =:= length(?BOTS) ->
    Room = spawn_link(rps_room, room, [Players]),
    lists:foreach(fun(Player) -> Player ! {room, Room} end, Players),
    lobby([]);
lobby(Players) ->
    receive
        {join, Who} ->
            lobby([Who|Players])
    end.
counter() ->
    counter(0, 0, dict:new(), dict:new()).
counter(Plays, Draws, Wins, Hands) ->
    receive
        {draw, _} ->
            counter(Plays + 1, Draws + 1, Wins, Hands);
        {winner, {Hand, Winner}} ->
            counter(Plays + 1, Draws,
                    dict:update_counter(Winner, 1, Wins),
                    dict:update_counter(Hand, 1, Hands));
        {sendstats, Pid} ->
            Pid ! {stats, {
                     plays, Plays,
                     draws, Draws,
                     wins, dict:to_list(Wins),
                     hands, dict:to_list(Hands)}},
            counter(Plays, Draws, Wins, Hands)
    end.
printer() ->
    receive
        {stats, Stats} ->
            io:format("Stats: ~w.~n", [Stats])
    after 1000 ->
            counter ! {sendstats, self()}
    end,
    printer().