-module(gleam@http@service).
-compile(no_auto_import).

-export([map_response_body/2, prepend_response_header/3, method_override/1]).

-spec map_response_body(
    fun((gleam@http@request:request(FCJ)) -> gleam@http@response:response(FCK)),
    fun((FCK) -> FCN)
) -> fun((gleam@http@request:request(FCJ)) -> gleam@http@response:response(FCN)).
map_response_body(Service, Mapper) ->
    fun(Req) ->
        _pipe = Req,
        _pipe@1 = Service(_pipe),
        gleam@http@response:map(_pipe@1, Mapper)
    end.

-spec prepend_response_header(
    fun((gleam@http@request:request(FCQ)) -> gleam@http@response:response(FCR)),
    binary(),
    binary()
) -> fun((gleam@http@request:request(FCQ)) -> gleam@http@response:response(FCR)).
prepend_response_header(Service, Key, Value) ->
    fun(Req) ->
        _pipe = Req,
        _pipe@1 = Service(_pipe),
        gleam@http@response:prepend_header(_pipe@1, Key, Value)
    end.

-spec ensure_post(gleam@http@request:request(FCW)) -> {ok,
                                                       gleam@http@request:request(FCW)} |
    {error, nil}.
ensure_post(Req) ->
    case erlang:element(2, Req) of
        post ->
            {ok, Req};

        _@1 ->
            {error, nil}
    end.

-spec get_override_method(gleam@http@request:request(any())) -> {ok,
                                                                 gleam@http:method()} |
    {error, nil}.
get_override_method(Request) ->
    case gleam@http@request:get_query(Request) of
        {error, _try} -> {error, _try};
        {ok, Query_params} ->
            case gleam@list:key_find(Query_params, <<"_method"/utf8>>) of
                {error, _try@1} -> {error, _try@1};
                {ok, Method} ->
                    case gleam@http:parse_method(Method) of
                        {error, _try@2} -> {error, _try@2};
                        {ok, Method@1} ->
                            case Method@1 of
                                put ->
                                    {ok, Method@1};

                                patch ->
                                    {ok, Method@1};

                                delete ->
                                    {ok, Method@1};

                                _@1 ->
                                    {error, nil}
                            end
                    end
            end
    end.

-spec method_override(
    fun((gleam@http@request:request(FDD)) -> gleam@http@response:response(FDE))
) -> fun((gleam@http@request:request(FDD)) -> gleam@http@response:response(FDE)).
method_override(Service) ->
    fun(Request) ->
        _pipe = Request,
        _pipe@1 = ensure_post(_pipe),
        _pipe@2 = gleam@result:then(_pipe@1, fun get_override_method/1),
        _pipe@3 = gleam@result:map(
            _pipe@2,
            fun(_capture) ->
                gleam@http@request:set_method(Request, _capture)
            end
        ),
        _pipe@4 = gleam@result:unwrap(_pipe@3, Request),
        Service(_pipe@4)
    end.