import { exports } from "cloudflare:workers";

export function controlRequest(pathOrUrl: string, init: RequestInit = {}): Request {
  const url = pathOrUrl.startsWith("http") ? pathOrUrl : `https://dav.example.com${pathOrUrl}`;
  const headers = new Headers(init.headers);
  return new Request(url, { ...init, headers });
}

export function subjectRequest(hostLabel: string, path: string, init: RequestInit = {}): Request {
  const headers = new Headers(init.headers);
  return new Request(`https://${hostLabel}.dav.example.com${path}`, { ...init, headers });
}

export function fetchWorker(request: Request): Promise<Response> {
  return exports.default.fetch(request);
}

export function setCookieHeaders(response: Response): string[] {
  return response.headers.getSetCookie?.() ?? [];
}

export function cookiePair(setCookie: string): string {
  return setCookie.split(";")[0] ?? setCookie;
}

export function cookiePairFor(response: Response, name: string): string {
  const cookie = setCookieHeaders(response).find((header) => header.startsWith(`${name}=`));
  if (!cookie) throw new Error(`Missing Set-Cookie for ${name}`);
  return cookiePair(cookie);
}

export function cookieHeaderFrom(response: Response): string {
  return setCookieHeaders(response).map(cookiePair).join("; ");
}