/**
 * TenantManager — SaaS 多租户管理器
 *
 * 1. 用户注册/认证/管理
 * 2. API Key 生成/验证/吊销
 * 3. 配额追踪/限制
 * 4. 用量记录/计费
 */
import type { SaasConfig, TenantAccount, ApiPermission, PlanTier, QuotaType, QuotaLimit, PlanQuotas, MonthlyBill, TenantSettings } from "./types.js";
export declare class TenantManager {
    private config;
    private data;
    private tenantMap;
    private keyMap;
    constructor(config?: Partial<SaasConfig>);
    /** 注册新用户 */
    createTenant(email: string, name: string, plan?: PlanTier): TenantAccount;
    /** 获取用户 */
    getTenant(id: string): TenantAccount | undefined;
    /** 通过邮箱查找 */
    getTenantByEmail(email: string): TenantAccount | undefined;
    /** 更新套餐 */
    upgradePlan(tenantId: string, newPlan: PlanTier): boolean;
    /** 暂停账户 */
    suspendTenant(tenantId: string): boolean;
    /** 更新设置 */
    updateSettings(tenantId: string, settings: Partial<TenantSettings>): boolean;
    /** 列出所有租户 */
    listTenants(): TenantAccount[];
    /** 通过 API Key 验证并返回租户 */
    authenticate(apiKey: string): TenantAccount | null;
    /** 创建新 API Key */
    createApiKey(tenantId: string, name: string, permissions?: ApiPermission[]): string | null;
    /** 吊销 API Key */
    revokeApiKey(tenantId: string, apiKey: string): boolean;
    /** 检查权限 */
    hasPermission(apiKey: string, permission: ApiPermission): boolean;
    /** 检查配额是否允许 */
    checkQuota(tenantId: string, type: QuotaType, amount?: number): {
        allowed: boolean;
        remaining: number;
    };
    /** 记录用量 */
    recordUsage(tenantId: string, type: QuotaType, amount?: number, metadata?: Record<string, unknown>): void;
    /** 获取当月用量 */
    getMonthlyUsage(tenantId: string, type?: QuotaType): number;
    /** 获取所有配额状态 */
    getQuotaStatus(tenantId: string): QuotaLimit[];
    /** 生成月度账单 */
    generateBill(tenantId: string, period?: string): MonthlyBill | null;
    /** 获取历史账单 */
    getBills(tenantId: string): MonthlyBill[];
    /** 获取所有套餐定义 */
    getPlans(): PlanQuotas[];
    /** 获取指定套餐 */
    getPlan(tier: PlanTier): PlanQuotas | undefined;
    getStatus(): {
        totalTenants: number;
        activeTenants: number;
        planDistribution: Record<string, number>;
        totalUsageThisMonth: number;
    };
    private generateApiKey;
    private initQuotas;
    private load;
    private save;
}
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