-module(ids@cuid_test).
-compile(no_auto_import).

-export([gen_test/0, is_cuid_test/0, slug_test/0, is_slug_test/0]).

gen_test() ->
    {ok, Channel} = ids@cuid:start(),
    gleam@should:be_true(check_collision(fun() -> ids@cuid:gen(Channel) end)),
    gleam@should:be_true(
        gleam@string:starts_with(ids@cuid:gen(Channel), <<"c"/utf8>>)
    ).

is_cuid_test() ->
    gleam@should:be_false(ids@cuid:is_cuid(<<"random"/utf8>>)),
    gleam@should:be_true(ids@cuid:is_cuid(<<"ckgr2o7lm0000ygenmx3pnnuf"/utf8>>)).

slug_test() ->
    {ok, Channel} = ids@cuid:start(),
    gleam@should:be_true(check_collision(fun() -> ids@cuid:slug(Channel) end)),
    gleam@should:be_true(ids@cuid:is_slug(ids@cuid:slug(Channel))).

is_slug_test() ->
    gleam@should:be_false(ids@cuid:is_slug(<<"random"/utf8>>)),
    gleam@should:be_true(ids@cuid:is_slug(<<"12345678"/utf8>>)).

check_collision(Func) ->
    gleam@pair:second(
        gleam@iterator:fold(
            gleam@iterator:unfold(0, fun(Acc) -> case Acc < 100000 of
                        false ->
                            done;

                        true ->
                            {next, Func(), Acc + 1}
                    end end),
            {gleam@map:new(), true},
            fun(Id, Acc@1) -> {IdMap, Flag} = Acc@1,
                case Flag of
                    false ->
                        Acc@1;

                    true ->
                        case gleam@map:get(IdMap, Id) of
                            {ok, _} ->
                                {IdMap, false};

                            {error, _} ->
                                {gleam@map:insert(IdMap, Id, Id), true}
                        end
                end end
        )
    ).