-module(runners).
-compile(no_auto_import).

-export([build_from_days_dir/0]).

-spec to_module(binary()) -> gleam@erlang@atom:atom_().
to_module(File) ->
    _pipe = File,
    _pipe@1 = gleam@string:replace(_pipe, <<".gleam"/utf8>>, <<""/utf8>>),
    _pipe@2 = gleam@string:replace(_pipe@1, <<".erl"/utf8>>, <<""/utf8>>),
    _pipe@3 = gleam@string:replace(_pipe@2, <<"/"/utf8>>, <<"@"/utf8>>),
    gleam@erlang@atom:create_from_string(_pipe@3).

-spec get_runner(binary()) -> {ok,
                               {integer(),
                                fun((binary()) -> {integer(), integer()})}} |
    {error, snag:snag()}.
get_runner(Filename) ->
    case begin
        _pipe = gleam@string:replace(Filename, <<"day_"/utf8>>, <<""/utf8>>),
        _pipe@1 = gleam@string:replace(_pipe, <<".gleam"/utf8>>, <<""/utf8>>),
        _pipe@2 = parse:day(_pipe@1),
        snag:context(
            _pipe@2,
            gleam@string:append(<<"cannot create runner for "/utf8>>, Filename)
        )
    end of
        {error, _try} -> {error, _try};
        {ok, Day} ->
            Run = begin
                _pipe@3 = Filename,
                _pipe@4 = gleam@string:append(<<"days/"/utf8>>, _pipe@3),
                _pipe@5 = to_module(_pipe@4),
                gladvent_ffi:get_run(_pipe@5)
            end,
            {ok, {Day, Run}}
    end.

-spec build_from_days_dir() -> {ok,
                                gleam@map:map_(integer(), fun((binary()) -> {integer(),
                                                                             integer()}))} |
    {error, snag:snag()}.
build_from_days_dir() ->
    _pipe = gladvent_ffi:find_files(
        <<"day_*.gleam"/utf8>>,
        <<"src/days/"/utf8>>
    ),
    _pipe@1 = gleam@list:try_map(_pipe, fun get_runner/1),
    _pipe@2 = gleam@result:map(_pipe@1, fun gleam@map:from_list/1),
    snag:context(
        _pipe@2,
        <<"failed to generate runners list from filesystem"/utf8>>
    ).