import { useCurrentUser } from '@/hooks/useCurrentUser';
import type { SkateCrew } from '@/lib/types';

export type CrewRole = 'founder' | 'admin' | 'member' | 'none';

export interface CrewRoleInfo {
  role: CrewRole;
  isFounder: boolean;
  /** Founder OR delegated admin — the set allowed elevated actions. */
  isAdmin: boolean;
  isMember: boolean;
  /** Can invite/vouch members & moderate the crew feed/chat. */
  canManage: boolean;
  /** Can edit the crew's core identity (founder only — addressable event owner). */
  canEditProfile: boolean;
}

/**
 * Resolve the logged-in user's role within a crew.
 *
 * Governance model (see NIP.md):
 * - **founder**: authored the crew's addressable event → sole owner of the
 *   crew identity. Only they can edit the profile (Nostr addressable events can
 *   only be overwritten by their author's key).
 * - **admin**: a delegated, confirmed member the founder marked with an `admin`
 *   role. Admins act with their OWN keys to invite members and moderate the
 *   crew feed/chat, but cannot rewrite the profile.
 * - **member**: a claimed member.
 * - **none**: not part of the crew.
 *
 * Egalitarian shared-editing is intentionally unsupported: it would require a
 * shared private key (insecure) or a consensus layer (non-interoperable).
 */
export function useCrewRole(crew: SkateCrew | null | undefined): CrewRoleInfo {
  const { user } = useCurrentUser();
  const pubkey = user?.pubkey;

  if (!crew || !pubkey) {
    return {
      role: 'none',
      isFounder: false,
      isAdmin: false,
      isMember: false,
      canManage: false,
      canEditProfile: false,
    };
  }

  const isFounder = pubkey === crew.pubkey;
  const isDelegatedAdmin = crew.admins.includes(pubkey);
  const isMember = crew.members.includes(pubkey);

  const role: CrewRole = isFounder
    ? 'founder'
    : isDelegatedAdmin
      ? 'admin'
      : isMember
        ? 'member'
        : 'none';

  const isAdmin = isFounder || isDelegatedAdmin;

  return {
    role,
    isFounder,
    isAdmin,
    isMember,
    canManage: isAdmin,
    canEditProfile: isFounder,
  };
}