import type { AdminInfo } from './types';

const TOKEN_KEY = 'admin_token';
const ADMIN_KEY = 'admin_info';

export function setAuth(token: string, admin: AdminInfo): void {
  localStorage.setItem(TOKEN_KEY, token);
  localStorage.setItem(ADMIN_KEY, JSON.stringify(admin));
}

export function getToken(): string | null {
  if (typeof window === 'undefined') return null;
  return localStorage.getItem(TOKEN_KEY);
}

export function getAdmin(): AdminInfo | null {
  if (typeof window === 'undefined') return null;
  const s = localStorage.getItem(ADMIN_KEY);
  return s ? (JSON.parse(s) as AdminInfo) : null;
}

export function clearAuth(): void {
  localStorage.removeItem(TOKEN_KEY);
  localStorage.removeItem(ADMIN_KEY);
}

export function isSuperAdmin(): boolean {
  return getAdmin()?.role === 'super_admin';
}

/** 当前 admin 是否有权做某操作(super_admin 恒可;否则角色需在 allowed 内)。与后端 require_role 对齐。 */
export function canDo(allowed: string[]): boolean {
  const role = getAdmin()?.role;
  return role === 'super_admin' || (role != null && allowed.includes(role));
}