import type { SubjectRow } from "@/worker/db/d1/schema";
import type { DiscoveryResource } from "@/worker/dav/discovery/resources";

export const PRINCIPALS_RESOURCE: DiscoveryResource = {
  kind: "principal-collection",
  protocol: "discovery",
  href: "/principals/",
  displayName: "principals",
};

export function principalHref(subject: SubjectRow): string {
  return `/principals/${subject.hostLabel}/`;
}

export function isPrincipalDiscoveryPath(pathname: string): boolean {
  return pathname === "/principals" || pathname.startsWith("/principals/");
}

export function principalResource(pathname: string, subject: SubjectRow): DiscoveryResource | null {
  if (pathname === "/principals" || pathname === "/principals/") return PRINCIPALS_RESOURCE;
  if (pathname === "/principals/me" || pathname === "/principals/me/") {
    return { kind: "principal", protocol: "discovery", href: "/principals/me/", displayName: subject.hostLabel };
  }
  if (pathname === `/principals/${subject.hostLabel}` || pathname === `/principals/${subject.hostLabel}/`) {
    return { kind: "principal", protocol: "discovery", href: principalHref(subject), displayName: subject.hostLabel };
  }
  return null;
}

export function principalChildResources(subject: SubjectRow): DiscoveryResource[] {
  return [
    { kind: "principal", protocol: "discovery", href: "/principals/me/", displayName: subject.hostLabel },
    { kind: "principal", protocol: "discovery", href: principalHref(subject), displayName: subject.hostLabel },
  ];
}