export declare class EmbeddingService {
    private embeddingCache;
    private persistentCachePath;
    private persistentCache;
    private verbose;
    private debug;
    constructor(options?: {
        verbose?: boolean;
        debug?: boolean;
        persistentCachePath?: string;
    });
    /**
     * Get embeddings for multiple texts in a single batch request
     * @param texts Array of texts to get embeddings for
     * @param retryCount Current retry attempt
     * @returns Array of embedding vectors
     */
    getEmbeddingsBatch(texts: string[], retryCount?: number): Promise<number[][]>;
    /**
     * Get embedding for a single text
     * @param text The text to get embedding for
     * @param retryCount Current retry attempt
     * @returns The embedding vector
     */
    getEmbedding(text: string, retryCount?: number): Promise<number[]>;
    /**
     * Normalize a vector to unit length
     * @param vector The vector to normalize
     * @returns The normalized vector
     */
    normalizeVector(vector: number[]): number[];
    /**
     * Clear the embedding cache
     */
    clearEmbeddingCache(): void;
    /**
     * Clear both in-memory and persistent caches
     */
    clearAllCaches(): void;
    /**
     * Get cached embedding for a text without generating a new one
     * @param text Text to check in cache
     * @returns Cached embedding or undefined if not in cache
     */
    getCachedEmbedding(text: string): number[] | undefined;
    /**
     * Get cache size
     * @returns Number of cached embeddings
     */
    getCacheSize(): number;
    /**
     * Get total cache size including persistent cache
     */
    getTotalCacheSize(): number;
    /**
     * Get cache statistics
     */
    getCacheStats(): {
        memorySize: number;
        persistentSize: number;
        totalSize: number;
        cacheEnabled: boolean;
    };
    /**
     * Load persistent cache from file
     */
    private loadPersistentCache;
    /**
     * Save persistent cache to file
     */
    private savePersistentCache;
    /**
     * Create a hash of the text content for cache validation
     */
    private hashText;
}
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