-module(glopenai@error).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/glopenai/error.gleam").
-export([api_error_decoder/0, wrapped_error_decoder/0, api_error_to_json/1]).
-export_type([api_error/0, glopenai_error/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.

-type api_error() :: {api_error,
        binary(),
        gleam@option:option(binary()),
        gleam@option:option(binary()),
        gleam@option:option(binary())}.

-type glopenai_error() :: {api_response_error, integer(), api_error()} |
    {json_decode_error, binary(), gleam@json:decode_error()} |
    {unexpected_response, integer(), binary()}.

-file("src/glopenai/error.gleam", 27).
?DOC(
    " Decode an ApiError from JSON.\n"
    " The OpenAI API wraps errors as `{\"error\": {...}}`.\n"
).
-spec api_error_decoder() -> gleam@dynamic@decode:decoder(api_error()).
api_error_decoder() ->
    gleam@dynamic@decode:field(
        <<"message"/utf8>>,
        {decoder, fun gleam@dynamic@decode:decode_string/1},
        fun(Message) ->
            gleam@dynamic@decode:field(
                <<"type"/utf8>>,
                gleam@dynamic@decode:optional(
                    {decoder, fun gleam@dynamic@decode:decode_string/1}
                ),
                fun(Error_type) ->
                    gleam@dynamic@decode:field(
                        <<"param"/utf8>>,
                        gleam@dynamic@decode:optional(
                            {decoder, fun gleam@dynamic@decode:decode_string/1}
                        ),
                        fun(Param) ->
                            gleam@dynamic@decode:field(
                                <<"code"/utf8>>,
                                gleam@dynamic@decode:optional(
                                    {decoder,
                                        fun gleam@dynamic@decode:decode_string/1}
                                ),
                                fun(Code) ->
                                    gleam@dynamic@decode:success(
                                        {api_error,
                                            Message,
                                            Error_type,
                                            Param,
                                            Code}
                                    )
                                end
                            )
                        end
                    )
                end
            )
        end
    ).

-file("src/glopenai/error.gleam", 41).
?DOC(" Decode the wrapped error envelope `{\"error\": ApiError}`.\n").
-spec wrapped_error_decoder() -> gleam@dynamic@decode:decoder(api_error()).
wrapped_error_decoder() ->
    gleam@dynamic@decode:field(
        <<"error"/utf8>>,
        api_error_decoder(),
        fun(Error) -> gleam@dynamic@decode:success(Error) end
    ).

-file("src/glopenai/error.gleam", 47).
?DOC(" Encode an ApiError to JSON.\n").
-spec api_error_to_json(api_error()) -> gleam@json:json().
api_error_to_json(Error) ->
    gleam@json:object(
        [{<<"message"/utf8>>, gleam@json:string(erlang:element(2, Error))},
            {<<"type"/utf8>>,
                gleam@json:nullable(
                    erlang:element(3, Error),
                    fun gleam@json:string/1
                )},
            {<<"param"/utf8>>,
                gleam@json:nullable(
                    erlang:element(4, Error),
                    fun gleam@json:string/1
                )},
            {<<"code"/utf8>>,
                gleam@json:nullable(
                    erlang:element(5, Error),
                    fun gleam@json:string/1
                )}]
    ).