/**
 * @license
 * Copyright 2023 Nuraly, Laabidi Aymen
 * SPDX-License-Identifier: MIT
 */
import type { ChatbotPlugin, ChatbotStorage } from '../core/types.js';
import type { ChatbotCoreController } from '../core/chatbot-core.controller.js';
/**
 * Persistence plugin - saves/loads state to storage
 */
export declare class PersistencePlugin implements ChatbotPlugin {
    readonly id = "persistence";
    readonly name = "Persistence Plugin";
    readonly version = "1.0.0";
    private storage;
    private storageKey;
    private autoSaveInterval?;
    constructor(storage: ChatbotStorage, options?: {
        storageKey?: string;
        autoSaveInterval?: number;
    });
    private controller?;
    onInit(controller: ChatbotCoreController): void;
    onDestroy(): void;
    onStateChange(): void;
    private saveState;
    private loadState;
    clearStorage(): Promise<void>;
}
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