-module(gtz).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([timezone/1, local_name/0]).

-file("/home/john/Repos/gtz/src/gtz.gleam", 21).
-spec timezone(binary()) -> {ok, tempo:time_zone_provider()} | {error, nil}.
timezone(Name) ->
    case 'Elixir.GTZ_FFI':is_valid_timezone(Name) of
        true ->
            {ok,
                {time_zone_provider,
                    fun() -> Name end,
                    fun(Utc_naive_datetime) ->
                        {{Year, Month, Day}, {Hour, Minute, Second}} = tempo@naive_datetime:to_tuple(
                            Utc_naive_datetime
                        ),
                        _assert_subject = begin
                            _pipe = 'Elixir.GTZ_FFI':calculate_offset(
                                Year,
                                Month,
                                Day,
                                Hour,
                                Minute,
                                Second,
                                Name
                            ),
                            tempo@offset:new(_pipe)
                        end,
                        {ok, Offset} = case _assert_subject of
                            {ok, _} -> _assert_subject;
                            _assert_fail ->
                                erlang:error(#{gleam_error => let_assert,
                                            message => <<"Pattern match failed, no pattern matched the value."/utf8>>,
                                            value => _assert_fail,
                                            module => <<"gtz"/utf8>>,
                                            function => <<"timezone"/utf8>>,
                                            line => 31})
                        end,
                        Offset
                    end}};

        false ->
            {error, nil}
    end.

-file("/home/john/Repos/gtz/src/gtz.gleam", 69).
-spec local_name() -> binary().
local_name() ->
    'Elixir.Timex.Timezone.Local':lookup().