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

-export([login/2, join_channel/2, get_twitch_subj/0, connect/2]).
-export_type([login_credentials/0]).

-type login_credentials() :: {static, binary(), binary()}.

-spec login(
    gleam@erlang@process:subject(stratus:internal_message(internal@websockets:msg())),
    gleam@option:option(login_credentials())
) -> nil.
login(Subj, Creds) ->
    {Username, Password} = case Creds of
        {some, Creds@1} ->
            {erlang:element(2, Creds@1), erlang:element(3, Creds@1)};

        none ->
            {<<"justinfan123"/utf8>>, <<"gibberish"/utf8>>}
    end,
    stratus:send_message(Subj, {message, <<"NICK "/utf8, Username/binary>>}),
    stratus:send_message(Subj, {message, <<"PASS "/utf8, Password/binary>>}).

-spec join_channel(
    gleam@erlang@process:subject(stratus:internal_message(internal@websockets:msg())),
    binary()
) -> nil.
join_channel(Subj, Channel) ->
    stratus:send_message(Subj, {message, <<"JOIN #"/utf8, Channel/binary>>}).

-spec get_twitch_subj() -> gleam@erlang@process:subject(stratus:internal_message(internal@websockets:msg())).
get_twitch_subj() ->
    _assert_subject = gleam@http@request:to(
        <<"http://irc-ws.chat.twitch.tv"/utf8>>
    ),
    {ok, Req} = case _assert_subject of
        {ok, _} -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"gwitch"/utf8>>,
                        function => <<"get_twitch_subj"/utf8>>,
                        line => 27})
    end,
    Initializer = fun() -> {nil, none} end,
    _assert_subject@1 = internal@websockets:create_websockets_builder(
        Req,
        Initializer
    ),
    {ok, Subj} = case _assert_subject@1 of
        {ok, _} -> _assert_subject@1;
        _assert_fail@1 ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail@1,
                        module => <<"gwitch"/utf8>>,
                        function => <<"get_twitch_subj"/utf8>>,
                        line => 31})
    end,
    Subj.

-spec connect(binary(), gleam@option:option(login_credentials())) -> gleam@erlang@process:subject(stratus:internal_message(internal@websockets:msg())).
connect(Channel, Creds) ->
    Twitch_subj = get_twitch_subj(),
    login(Twitch_subj, Creds),
    join_channel(Twitch_subj, Channel),
    Twitch_subj.