-module(i3_client_codec).
-moduledoc false.

-export([decode_msg/2, encode_msg/2, decode_event_type/1]).

-include("i3_client_codec.hrl").

decode_msg(Type0, Payload) ->
    case Type0 bsr 31 of
        0 -> {reply, Type0, Payload};
        1 -> {event, Type0 band ?event_mask, Payload}
    end.

encode_msg(Type, Payload0) ->
    Payload1 = encode_payload(Payload0),
    Size = iolist_size(Payload1),
    [?magic, <<Size:32/native, Type:32/native>>, Payload1].

encode_payload(Payload) when is_binary(Payload) ->
    Payload;
encode_payload(Payload) ->
    json:encode(Payload).

decode_event_type(0) ->
    <<"workspace">>;
decode_event_type(1) ->
    <<"output">>;
decode_event_type(2) ->
    <<"mode">>;
decode_event_type(3) ->
    <<"window">>;
decode_event_type(4) ->
    <<"barconfig_update">>;
decode_event_type(5) ->
    <<"binding">>;
decode_event_type(6) ->
    <<"shutdown">>;
decode_event_type(7) ->
    <<"tick">>;
decode_event_type(14) ->
    <<"bar_state_update">>;
decode_event_type(21) ->
    <<"input">>.