import type { OfflineVectorExport } from './types.js';
export interface OfflineStorageMeta {
    version: string;
    exportedAt: string;
    documentCount: number;
    chunkCount: number;
    type: 'general' | 'tenant' | 'combined';
}
/**
 * IndexedDB storage for offline vector exports
 * Provides persistent caching of pre-computed TF-IDF vectors
 */
export declare class CyberneticOfflineStorage {
    private db;
    private dbPromise;
    private readonly dbName;
    private readonly dbVersion;
    /**
     * Initialize IndexedDB for vector storage
     */
    private initDB;
    /**
     * Store vector export in IndexedDB
     */
    store(id: string, exportData: OfflineVectorExport): Promise<void>;
    /**
     * Retrieve vector export from IndexedDB
     */
    retrieve(id: string): Promise<OfflineVectorExport | null>;
    /**
     * Check if cached vectors are valid (not expired)
     */
    isValid(id: string, maxAge: number): Promise<boolean>;
    /**
     * Get cached export metadata without loading full data
     */
    getMeta(id: string): Promise<OfflineStorageMeta | null>;
    /**
     * Check if any cached vectors exist
     */
    hasData(): Promise<boolean>;
    /**
     * Get all cached export IDs
     */
    getStoredIds(): Promise<string[]>;
    /**
     * Clear specific cached vectors
     */
    delete(id: string): Promise<void>;
    /**
     * Clear all cached vectors
     */
    clear(): Promise<void>;
    /**
     * Get the database connection
     */
    private getDB;
    /**
     * Close database connection
     */
    close(): void;
}
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