/**
 * VIP 权限判断工具（前端口子）
 * 当前从登录态 userInfo.vip 读取；后续可扩展为按 storeId 请求接口
 */
import { useUserStore } from '@vben/stores';

export interface StoreVipInfo {
  level_code?: string;
  level_name?: string;
  level_weight?: number;
  badge_url?: string;
  duration_type?: string;
  duration_label?: string;
  duration_badge_url?: string;
  permissions?: string[];
  expire_at?: number;
  is_lifetime?: boolean;
}

/** 读取当前登录用户 VIP 信息 */
export function getCurrentVip(): StoreVipInfo | null {
  const userStore = useUserStore();
  return ((userStore.userInfo as any)?.vip as StoreVipInfo) || null;
}

/** 是否拥有指定权限码 */
export function hasVipPermission(code: string): boolean {
  if (!code) return false;
  const vip = getCurrentVip();
  const list = vip?.permissions;
  return Array.isArray(list) && list.includes(code);
}

/**
 * 等级是否不低于目标（按 level_weight；若无 weight 则仅精确匹配编码时返回 true）
 * 简化：仅当当前 level_code 与 minCode 相同，或 weight 足够时通过
 */
export function levelAtLeast(minCode: string): boolean {
  const vip = getCurrentVip();
  if (!vip?.level_code) return false;
  if (vip.level_code === minCode) return true;
  // 无完整等级表时，仅做字符串相等判断；业务侧应以后端 Gate 为准
  const weight = Number(vip.level_weight ?? 0);
  const minWeight = parseLevelWeight(minCode);
  if (minWeight >= 0) {
    return weight >= minWeight;
  }
  return false;
}

/** 粗略解析 V0-V11 / BLACK_GOLD / CUSTOM 权重 */
function parseLevelWeight(code: string): number {
  if (/^V\d+$/i.test(code)) {
    return Number(code.slice(1));
  }
  if (code === 'BLACK_GOLD') return 12;
  if (code === 'CUSTOM') return 13;
  return -1;
}

/** 组合式：供组件调用 */
export function useVipGate() {
  return {
    vip: getCurrentVip(),
    hasVipPermission,
    levelAtLeast,
  };
}