import {
  Either,
  type ITraceable,
  LogLevel,
  PenguenoError,
  type PenguenoRequest,
  type RequestFilter,
  type ServerTrace,
  TraceUtil,
} from "@emprespresso/pengueno";

type HttpMethod =
  | "POST"
  | "GET"
  | "HEAD"
  | "PUT"
  | "DELETE"
  | "CONNECT"
  | "OPTIONS"
  | "TRACE"
  | "PATCH";

export const requireMethod =
  (methods: Array<HttpMethod>): RequestFilter<HttpMethod> =>
  (req: ITraceable<PenguenoRequest, ServerTrace>) =>
    req
      .bimap(TraceUtil.withFunctionTrace(requireMethod))
      .move(Promise.resolve(req.get()))
      .map(
        TraceUtil.promiseify((t) => {
          const { method: _method } = t.get();
          const method = <HttpMethod>_method;
          if (!methods.includes(method)) {
            const msg = "that's not how you pet me (⋟﹏⋞)~";
            t.trace.addTrace(LogLevel.WARN).trace(msg);
            return Either.left<PenguenoError, HttpMethod>(
              new PenguenoError(msg, 405),
            );
          }
          return Either.right<PenguenoError, HttpMethod>(method);
        }),
      )
      .get();