-module(glome@core@error).
-compile(no_auto_import).

-export([stringify_decode_error/1, json_decode_error/1, map_decode_errors/1, map_decode_error/1, map_connection_error/1]).
-export_type([glome_error/0]).

-type glome_error() :: {websocket_connection_error, binary()} |
    {json_decode_error, binary()} |
    {authentication_error, binary()} |
    {deserialization_error, glome_error(), binary()} |
    {entity_id_format_error, binary()} |
    {call_service_error, binary()} |
    not_allowed_http_method |
    {bad_request, binary()} |
    {not_found, binary()} |
    loop_nil.

-spec stringify_decode_error(gleam@dynamic:decode_error()) -> binary().
stringify_decode_error(Error) ->
    gleam@string:concat(
        [<<"expected: "/utf8>>,
         erlang:element(2, Error),
         <<" got instead: "/utf8>>,
         erlang:element(3, Error),
         <<" at path: "/utf8>>,
         gleam@string:join(erlang:element(4, Error), <<"."/utf8>>)]
    ).

-spec json_decode_error(binary()) -> glome_error().
json_decode_error(Reason) ->
    {json_decode_error,
     gleam@string:concat(
         [<<"could not decode json due to: [ "/utf8>>, Reason, <<" ]"/utf8>>]
     )}.

-spec map_decode_errors({ok, GQU} | {error, list(gleam@dynamic:decode_error())}) -> {ok,
                                                                                     GQU} |
    {error, glome_error()}.
map_decode_errors(Errors) ->
    gleam@result:map_error(
        Errors,
        fun(Decode_errors) ->
            _pipe = gleam@list:map(Decode_errors, fun stringify_decode_error/1),
            _pipe@1 = gleam@string:join(_pipe, <<"ln"/utf8>>),
            json_decode_error(_pipe@1)
        end
    ).

-spec map_decode_error({ok, GQZ} | {error, gleam@dynamic:decode_error()}) -> {ok,
                                                                              GQZ} |
    {error, glome_error()}.
map_decode_error(Error) ->
    gleam@result:map_error(
        Error,
        fun(Decode_error) ->
            _pipe = stringify_decode_error(Decode_error),
            json_decode_error(_pipe)
        end
    ).

-spec map_connection_error({ok, GRE} | {error, nerf@websocket:connect_error()}) -> {ok,
                                                                                    GRE} |
    {error, glome_error()}.
map_connection_error(Error) ->
    gleam@result:map_error(Error, fun(Conn_error) -> case Conn_error of
                {connection_refused, Status, Headers} ->
                    _pipe = gleam@string:concat(
                        [<<"connection from homeassistant refused,\n"/utf8>>,
                         <<"server responded with status [ "/utf8>>,
                         gleam@int:to_string(Status),
                         <<" ]"/utf8>>]
                    ),
                    {websocket_connection_error, _pipe};

                {connection_failed, Reason} ->
                    _pipe@1 = gleam@string:concat(
                        [<<"connection to homeassistant failed,\n"/utf8>>,
                         <<"due to: [ "/utf8>>,
                         <<"unknown connection error"/utf8>>,
                         <<" ]"/utf8>>]
                    ),
                    {websocket_connection_error, _pipe@1}
            end end).