import type { QName } from "@/worker/xml/namespaces";
import { CALDAV_NS, CARDDAV_NS, DAV_NS, sameQName } from "@/worker/xml/namespaces";

export const LIVE_DAV_PROPS = [
  "creationdate",
  "displayname",
  "getcontentlanguage",
  "getcontentlength",
  "getcontenttype",
  "getetag",
  "getlastmodified",
  "lockdiscovery",
  "resourcetype",
  "supportedlock",
] as const;

// Computed/protected DAV props that are never writable as dead props on any resource.
// RFC 3744 (ACL), RFC 4791 (CalDAV), RFC 6352 (CardDAV), RFC 6578 (sync).
const PROTECTED_DAV_LOCAL_NAMES_ALL = new Set<string>([
  "getcontentlength",
  "getcontenttype",
  "getetag",
  "getlastmodified",
  "creationdate",
  "lockdiscovery",
  "supportedlock",
  "resourcetype",
  "supported-report-set",
  "sync-token",
  "owner",
  "group",
  "principal-collection-set",
  "current-user-principal",
  "current-user-privilege-set",
  "supported-privilege-set",
  "acl",
  "acl-restrictions",
  "inherited-acl-set",
]);

const PROTECTED_CALDAV_LOCAL_NAMES = new Set<string>([
  "supported-calendar-data",
  "supported-calendar-component-set",
  "max-resource-size",
  "calendar-home-set",
  "calendar-user-address-set",
  "calendar-user-type",
  "schedule-inbox-URL",
  "schedule-outbox-URL",
]);

const PROTECTED_CARDDAV_LOCAL_NAMES = new Set<string>([
  "supported-address-data",
  "max-resource-size",
  "addressbook-home-set",
]);

export function davProp(localName: string): QName {
  return { nsUri: DAV_NS, localName };
}

// Resource kinds for protected property policy. Collections accept displayname as a
// settable property where the RFCs allow it; objects keep displayname as a live prop.
export type DavResourcePropKind =
  | "file-resource"
  | "calendar-home"
  | "calendar-collection"
  | "calendar-object"
  | "addressbook-home"
  | "addressbook-collection"
  | "addressbook-object";

export function isProtectedLivePropForResource(prop: QName, kind: DavResourcePropKind): boolean {
  if (prop.nsUri === DAV_NS) {
    if (PROTECTED_DAV_LOCAL_NAMES_ALL.has(prop.localName)) return true;
    // RFC 4791 4.2 / RFC 6352 5.2: displayname is mutable on calendar and address book
    // collections; on file resources and objects, treat it as protected like other live props.
    if (prop.localName === "displayname") {
      return (
        kind === "file-resource" ||
        kind === "calendar-object" ||
        kind === "addressbook-object" ||
        kind === "calendar-home" ||
        kind === "addressbook-home"
      );
    }
    return false;
  }
  if (prop.nsUri === CALDAV_NS) return PROTECTED_CALDAV_LOCAL_NAMES.has(prop.localName);
  if (prop.nsUri === CARDDAV_NS) return PROTECTED_CARDDAV_LOCAL_NAMES.has(prop.localName);
  return false;
}

export function includesProp(props: QName[], wanted: QName): boolean {
  return props.some((prop) => sameQName(prop, wanted));
}

export function defaultAllpropNames(): QName[] {
  return LIVE_DAV_PROPS.map((name) => davProp(name));
}