import { useCallback, useMemo } from 'react';
import { getUser, type AuthUser } from '../store/auth';

export function usePermissions(userOverride?: AuthUser | null) {
  const user = userOverride === undefined ? getUser() : userOverride;
  const permissions = useMemo(() => user?.permissions ?? [], [user]);

  const permissionSet = useMemo(() => new Set(permissions), [permissions]);

  const can = useCallback((permission: string) => permissionSet.has(permission), [permissionSet]);

  const canAny = useCallback(
    (items: string[]) => items.some((permission) => permissionSet.has(permission)),
    [permissionSet],
  );

  return {
    user,
    can,
    canAny,
    permissions,
  };
}