/**
 * 凭证管理模块
 * 用于安全地存储和管理用户的登录凭证
 */
export type CredentialSource = "env" | "global_config" | "none";
export interface BilibiliCredentials {
    sessdata: string;
    bili_jct: string;
    dedeuserid: string;
    expiresAt: number;
}
/** 全局配置文件路径: ~/.bilibili-mcp/config.json */
export declare const GLOBAL_CONFIG_DIR: string;
export declare const GLOBAL_CONFIG_FILE: string;
export declare class CredentialManager {
    private static instance;
    private credentials;
    private constructor();
    static getInstance(): CredentialManager;
    /**
     * 从环境变量加载凭证
     */
    loadFromEnv(): BilibiliCredentials | null;
    /**
     * 从全局配置文件加载凭证 (~/.bilibili-mcp/config.json)
     */
    loadFromFile(): BilibiliCredentials | null;
    /**
     * 将当前凭证持久化保存至全局配置文件
     */
    saveToFile(credentials: BilibiliCredentials): void;
    /**
     * 设置凭证
     */
    setCredentials(credentials: BilibiliCredentials): void;
    /**
     * 获取凭证（优先级：内存 > 环境变量 > 全局配置文件）
     */
    getCredentials(): BilibiliCredentials | null;
    /**
     * 检查凭证是否过期
     */
    isExpired(): boolean;
    /**
     * 检查凭证是否即将过期（7天内）
     */
    isExpiringSoon(): boolean;
    /**
     * 刷新凭证过期时间
     */
    refreshExpiration(): void;
    getCredentialSource(): CredentialSource;
    /**
     * 清除凭证
     */
    clearCredentials(): void;
    /**
     * 检查是否已登录
     */
    isLoggedIn(): boolean;
    /**
     * 获取请求头
     */
    getAuthHeaders(candidate?: BilibiliCredentials): Record<string, string>;
}
export declare const credentialManager: CredentialManager;
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