-module(finch).
-compile([no_auto_import, nowarn_unused_vars]).

-export([stream/5, start_link/1, build/2, request/2]).
-export_type([method/0, request_option/0, request/0, response/0, exception/0, response_body_key/0, response_headers_key/0, response_status_key/0]).

-type method() :: head | get | put | post | patch | delete | options.

-type request_option() :: {pool_timeout, integer()} |
    {request_timeout, integer()}.

-type request() :: any().

-type response() :: any().

-type exception() :: any().

-type response_body_key() :: body.

-type response_headers_key() :: headers.

-type response_status_key() :: status.

-spec stream(
    request(),
    gleam@erlang@atom:atom_(),
    JFM,
    fun((finch@stream:stream_block(), JFM) -> JFM),
    list(request_option())
) -> {ok, JFM} | {error, exception()}.
stream(Req, Name, Acc, Fun, Opts) ->
    'Elixir.Finch':stream(Req, Name, Acc, Fun, Opts).

-spec start_link(list(finch@otp:instance_option())) -> finch@otp:on_start().
start_link(Opts) ->
    'Elixir.Finch':start_link(Opts).

-spec gleam_method_to_finch_method(gleam@http:method()) -> method().
gleam_method_to_finch_method(Method) ->
    case Method of
        get ->
            get;

        head ->
            head;

        post ->
            post;

        put ->
            put;

        patch ->
            patch;

        delete ->
            delete;

        options ->
            options;

        _ ->
            get
    end.

-spec build(gleam@http@request:request(binary()), list(request_option())) -> request().
build(Req, Opts) ->
    Url_str = begin
        _pipe = Req,
        _pipe@1 = gleam@http@request:to_uri(_pipe),
        gleam@uri:to_string(_pipe@1)
    end,
    'Elixir.Finch':build(
        gleam_method_to_finch_method(erlang:element(2, Req)),
        Url_str,
        erlang:element(3, Req),
        erlang:element(4, Req),
        Opts
    ).

-spec response_body(response()) -> binary().
response_body(Resp) ->
    'Elixir.Map':'fetch!'(Resp, body).

-spec response_status(response()) -> integer().
response_status(Resp) ->
    'Elixir.Map':'fetch!'(Resp, status).

-spec response_headers(response()) -> list({binary(), binary()}).
response_headers(Resp) ->
    'Elixir.Map':'fetch!'(Resp, headers).

-spec request(request(), gleam@erlang@atom:atom_()) -> {ok,
        gleam@http@response:response(binary())} |
    {error, exception()}.
request(Req, Name) ->
    gleam@result:then(
        'Elixir.Finch':request(Req, Name),
        fun(Resp) ->
            {ok,
                {response,
                    response_status(Resp),
                    response_headers(Resp),
                    response_body(Resp)}}
        end
    ).