-module(dove@client).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function]).

-export([connect/3]).
-export_type([connection/1, message/1]).

-type connection(HJB) :: {connection,
        binary(),
        gleam@erlang@process:subject(message(HJB))}.

-type message(HJC) :: shutdown |
    {request,
        bitstring(),
        gleam@erlang@process:subject({ok, dove@response:response(HJC)} |
            {error, dove@error:error()}),
        gleam@option:option(fun((gleam@dynamic:dynamic_()) -> {ok, HJC} |
            {error, list(gleam@dynamic:decode_error())})),
        integer()}.

-spec 'receive'(
    mug:socket(),
    gleam@erlang@process:selector({ok, bitstring()} | {error, mug:error()}),
    bitstring(),
    integer(),
    integer()
) -> {ok, {integer(), list({binary(), binary()}), binary()}} |
    {error, dove@error:error()}.
'receive'(Socket, Selector, Storage, Start_time, Timeout) ->
    case dove@response@decoder:decode(Storage) of
        {ok, Value} ->
            {ok, Value};

        {error, more_needed} ->
            case (erlang:monotonic_time() - Start_time) >= (Timeout * 1000000) of
                true ->
                    {error, {tcp_error, timeout}};

                false ->
                    case dove@tcp:'receive'(Socket, Selector, Timeout) of
                        {error, Tcp_error} ->
                            {error, {tcp_error, Tcp_error}};

                        {ok, Packet} ->
                            'receive'(
                                Socket,
                                Selector,
                                gleam@bit_array:append(Storage, Packet),
                                Start_time,
                                Timeout
                            )
                    end
            end;

        {error, Error} ->
            {error, Error}
    end.

-spec handle_message(message(any()), mug:socket()) -> gleam@otp@actor:next(any(), mug:socket()).
handle_message(Msg, Socket) ->
    case Msg of
        {request, Req, Reply_with, Decoder_option, Timeout} ->
            case dove@tcp:send(Socket, Req) of
                {ok, nil} ->
                    Selector = dove@tcp:new_selector(),
                    case 'receive'(
                        Socket,
                        Selector,
                        <<>>,
                        erlang:monotonic_time(),
                        Timeout
                    ) of
                        {ok, Reply} ->
                            _assert_subject = gleam@list:key_find(
                                [{100, continue},
                                    {101, switching_protocols},
                                    {102, processing},
                                    {103, early_hints},
                                    {200, ok},
                                    {201, created},
                                    {202, accepted},
                                    {203, non_authoritative_information},
                                    {204, no_content},
                                    {205, reset_content},
                                    {206, partial_content},
                                    {207, multi_status},
                                    {300, multiple_choices},
                                    {301, moved_permanently},
                                    {302, found},
                                    {303, see_other},
                                    {304, not_modified},
                                    {305, use_proxy},
                                    {307, temporary_redirect},
                                    {400, bad_request},
                                    {401, unauthorized},
                                    {402, payment_required},
                                    {403, forbidden},
                                    {404, not_found},
                                    {405, method_not_allowed},
                                    {406, not_acceptable},
                                    {407, proxy_authentication_required},
                                    {408, request_timeout},
                                    {409, conflict},
                                    {410, gone},
                                    {411, length_required},
                                    {412, precondition_failed},
                                    {413, payload_too_large},
                                    {414, uri_too_long},
                                    {415, unsupported_media_type},
                                    {416, range_not_satisfiable},
                                    {417, expectation_failed},
                                    {418, im_a_teapot},
                                    {422, unprocessable_entity},
                                    {423, locked},
                                    {424, failed_dependency},
                                    {425, too_early},
                                    {426, upgrade_required},
                                    {428, precondition_required},
                                    {429, too_many_requests},
                                    {431, request_header_fields_too_large},
                                    {451, unavailable_for_legal_reasons},
                                    {500, internal_server_error},
                                    {501, not_implemented},
                                    {502, bad_gateway},
                                    {503, service_unavailable},
                                    {504, gateway_timeout},
                                    {505, http_version_not_supported},
                                    {506, variant_also_negotiates},
                                    {507, insufficient_storage},
                                    {508, loop_detected},
                                    {510, not_extended},
                                    {511, network_authentication_required}],
                                erlang:element(1, Reply)
                            ),
                            {ok, Status} = 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 => <<"dove/client"/utf8>>,
                                                function => <<"handle_message"/utf8>>,
                                                line => 61})
                            end,
                            case Decoder_option of
                                {some, Decoder} ->
                                    case gleam@json:decode(
                                        erlang:element(3, Reply),
                                        Decoder
                                    ) of
                                        {ok, Value} ->
                                            gleam@otp@actor:send(
                                                Reply_with,
                                                {ok,
                                                    {response,
                                                        Status,
                                                        erlang:element(2, Reply),
                                                        {decoded, Value}}}
                                            );

                                        {error, Decode_error} ->
                                            gleam@otp@actor:send(
                                                Reply_with,
                                                {error,
                                                    {decode_error, Decode_error}}
                                            )
                                    end;

                                none ->
                                    gleam@otp@actor:send(
                                        Reply_with,
                                        {ok,
                                            {response,
                                                Status,
                                                erlang:element(2, Reply),
                                                {raw, erlang:element(3, Reply)}}}
                                    )
                            end,
                            gleam@otp@actor:continue(Socket);

                        {error, Error} ->
                            _ = mug_ffi:shutdown(Socket),
                            gleam@otp@actor:send(Reply_with, {error, Error}),
                            {stop, {abnormal, <<"TCP Error"/utf8>>}}
                    end;

                {error, Error@1} ->
                    _ = mug_ffi:shutdown(Socket),
                    gleam@otp@actor:send(
                        Reply_with,
                        {error, {tcp_error, Error@1}}
                    ),
                    {stop, {abnormal, <<"TCP Error"/utf8>>}}
            end;

        shutdown ->
            _ = mug_ffi:shutdown(Socket),
            {stop, normal}
    end.

-spec connect(binary(), integer(), integer()) -> {ok, connection(any())} |
    {error, gleam@otp@actor:start_error()}.
connect(Host, Port, Timeout) ->
    gleam@result:then(
        gleam@otp@actor:start_spec(
            {spec, fun() -> case dove@tcp:connect(Host, Port, Timeout) of
                        {ok, Socket} ->
                            {ready, Socket, gleam_erlang_ffi:new_selector()};

                        {error, _} ->
                            {failed,
                                <<"Unable to connect to Redis server"/utf8>>}
                    end end, Timeout, fun handle_message/2}
        ),
        fun(Subject) ->
            _pipe = (<<<<Host/binary, ":"/utf8>>/binary,
                (gleam@int:to_string(Port))/binary>>),
            _pipe@1 = {connection, _pipe, Subject},
            {ok, _pipe@1}
        end
    ).