-module(barnacle@local_epmd).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([discover_nodes/0]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

-file("src/barnacle/local_epmd.gleam", 10).
-spec get_hostname() -> binary().
get_hostname() ->
    Host = begin
        _pipe = erlang:node(),
        _pipe@1 = gleam_erlang_ffi:identity(_pipe),
        erlang:atom_to_binary(_pipe@1)
    end,
    _assert_subject = gleam@string:split(Host, <<"@"/utf8>>),
    [_, Hostname] = case _assert_subject of
        [_, _] -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Pattern match failed, no pattern matched the value."/utf8>>,
                        value => _assert_fail,
                        module => <<"barnacle/local_epmd"/utf8>>,
                        function => <<"get_hostname"/utf8>>,
                        line => 16})
    end,
    Hostname.

-file("src/barnacle/local_epmd.gleam", 22).
?DOC(
    " Discover nodes using the local EPMD. This will discover nodes on the same\n"
    " hostname as the current node.\n"
).
-spec discover_nodes() -> {ok, list(gleam@erlang@atom:atom_())} | {error, nil}.
discover_nodes() ->
    Hostname = get_hostname(),
    _pipe = barnacle_ffi:list_local_nodes(),
    gleam@result:map(
        _pipe,
        fun(_capture) ->
            gleam@list:map(
                _capture,
                fun(N) ->
                    _pipe@1 = (<<<<N/binary, "@"/utf8>>/binary,
                        Hostname/binary>>),
                    erlang:binary_to_atom(_pipe@1)
                end
            )
        end
    ).