/**
 * @fileoverview Prompt cache for storing and retrieving optimized prompts.
 *
 * This module provides functionality for caching optimized prompts and retrieving
 * them for future use. It supports both memory-based and file-based caching.
 */
import { ReviewType } from '../../types/review';
/**
 * Interface for a cached prompt
 */
export interface CachedPrompt {
    /**
     * Content of the prompt
     */
    content: string;
    /**
     * Rating of the prompt (1-5)
     */
    rating: number;
    /**
     * Timestamp when the prompt was cached
     */
    timestamp: string;
    /**
     * Number of times the prompt has been used
     */
    usageCount: number;
}
/**
 * Cache for optimized prompts
 */
export declare class PromptCache {
    private static instance;
    private memoryCache;
    private cacheDir;
    /**
     * Create a new prompt cache
     * @param cacheDir Directory for storing cached prompts
     */
    private constructor();
    /**
     * Get the singleton instance
     * @param cacheDir Directory for storing cached prompts
     * @returns The prompt cache instance
     */
    static getInstance(cacheDir?: string): PromptCache;
    /**
     * Initialize the prompt cache
     */
    private initialize;
    /**
     * Load cached prompts from disk
     */
    private loadCachedPrompts;
    /**
     * Save the memory cache to disk
     */
    private saveCacheToDisk;
    /**
     * Cache a prompt for future use
     * @param reviewType Type of review
     * @param promptContent Content of the prompt
     * @param rating Rating of the prompt (1-5)
     */
    cachePrompt(reviewType: ReviewType, promptContent: string, rating: number): Promise<void>;
    /**
     * Get the best cached prompt for a review type
     * @param reviewType Type of review
     * @returns The best cached prompt, or undefined if none exists
     */
    getBestPrompt(reviewType: ReviewType): CachedPrompt | undefined;
    /**
     * Get all cached prompts for a review type
     * @param reviewType Type of review
     * @returns Array of cached prompts
     */
    getAllPrompts(reviewType: ReviewType): CachedPrompt[];
    /**
     * Clear the cache for a review type
     * @param reviewType Type of review
     */
    clearCache(reviewType: ReviewType): Promise<void>;
    /**
     * Clear the entire cache
     */
    clearAllCaches(): Promise<void>;
    /**
     * Get the cache key for a review type
     * @param reviewType Type of review
     * @returns Cache key
     */
    private getCacheKey;
}