/**
 * Smart Cache API - 83% token reduction through intelligent API response caching
 *
 * Features:
 * - Multiple caching strategies (TTL, ETag, Event-based, LRU, Size-based)
 * - Intelligent cache key generation with normalization
 * - Pattern-based and tag-based invalidation
 * - Stale-while-revalidate support
 * - Cache hit rate analysis and optimization
 * - Memory usage tracking
 */
import { CacheEngine } from '../../core/cache-engine.js';
import type { TokenCounter } from '../../core/token-counter.js';
import type { MetricsCollector } from '../../core/metrics.js';
export interface APIRequest {
    url: string;
    method?: string;
    headers?: Record<string, string>;
    body?: any;
    params?: Record<string, any>;
}
export interface CachedResponse {
    data: any;
    headers?: Record<string, string>;
    status?: number;
    etag?: string;
    timestamp: number;
    ttl: number;
    tags?: string[];
    accessCount: number;
    lastAccessed: number;
    size: number;
}
export type CachingStrategy = 'ttl' | 'etag' | 'event' | 'lru' | 'size-based' | 'hybrid';
export type InvalidationPattern = 'time' | 'pattern' | 'tag' | 'manual' | 'event';
export interface SmartCacheAPIOptions {
    action: 'get' | 'set' | 'invalidate' | 'analyze' | 'warm';
    request?: APIRequest;
    response?: any;
    strategy?: CachingStrategy;
    ttl?: number;
    invalidationPattern?: InvalidationPattern;
    pattern?: string;
    tags?: string[];
    staleWhileRevalidate?: boolean;
    staleTime?: number;
    since?: number;
    includeDetails?: boolean;
    endpoints?: string[];
    maxCacheSize?: number;
    maxEntries?: number;
    normalizeQuery?: boolean;
    ignoreHeaders?: string[];
    customKeyGenerator?: (req: APIRequest) => string;
}
export interface SmartCacheAPIResult {
    success: boolean;
    action: string;
    data?: any;
    cached?: boolean;
    stale?: boolean;
    metadata?: {
        cacheKey?: string;
        ttl?: number;
        age?: number;
        expiresIn?: number;
        tags?: string[];
        tokensSaved?: number;
        tokenCount?: number;
        originalTokenCount?: number;
        compressionRatio?: number;
    };
    invalidated?: {
        count: number;
        keys: string[];
        totalSize: number;
    };
    analysis?: {
        hitRate: number;
        missRate: number;
        totalRequests: number;
        cacheHits: number;
        cacheMisses: number;
        avgResponseSize: number;
        totalCacheSize: number;
        entryCount: number;
        oldestEntry?: number;
        newestEntry?: number;
        mostAccessed?: Array<{
            key: string;
            url: string;
            accessCount: number;
        }>;
        recommendations?: string[];
    };
    warmed?: {
        count: number;
        urls: string[];
        totalSize: number;
    };
    error?: string;
}
export interface CacheAnalysis {
    hitRate: number;
    missRate: number;
    totalRequests: number;
    cacheHits: number;
    cacheMisses: number;
    avgResponseSize: number;
    totalCacheSize: number;
    entryCount: number;
    recommendations: string[];
}
export declare class SmartCacheAPI {
    private cache;
    private tokenCounter;
    private metrics;
    private cacheStats;
    private revalidationQueue;
    constructor(cache: CacheEngine, tokenCounter: TokenCounter, metrics: MetricsCollector);
    /**
     * Main entry point for cache operations
     */
    run(options: SmartCacheAPIOptions): Promise<SmartCacheAPIResult>;
    /**
     * Get cached API response
     */
    private getCachedResponse;
    /**
     * Set/cache API response
     */
    private setCachedResponse;
    /**
     * Invalidate cached entries
     */
    private invalidateCache;
    /**
     * Analyze cache performance
     */
    private analyzeCache;
    /**
     * Warm cache by pre-fetching endpoints
     */
    private warmCache;
    /**
     * Generate cache key from request with normalization
     */
    private generateCacheKey;
    /**
     * Transform cached response to output format with token reduction
     */
    private transformOutput;
    /**
     * Generate summary of data for cached responses
     */
    private generateSummary;
    /**
     * Revalidate cache entry in background (stale-while-revalidate)
     */
    private revalidateInBackground;
    /**
     * Convert URL pattern to regex
     */
    private patternToRegex;
    /**
     * Get all cache keys (placeholder - implementation depends on cache engine)
     */
    private getAllCacheKeys;
    /**
     * Extract URL from cache key
     */
    private extractUrlFromKey;
    /**
     * Serialize CachedResponse to Buffer for storage
     */
    private serializeCachedResponse;
    /**
     * Deserialize Buffer to CachedResponse
     */
    private deserializeCachedResponse;
    /**
     * Hash a string using SHA-256
     */
    private hashString;
}
/**
 * Factory Function - Use Constructor Injection
 */
export declare function getSmartCacheApi(cache: CacheEngine, tokenCounter: TokenCounter, metrics: MetricsCollector): SmartCacheAPI;
/**
 * CLI Function - Create Resources and Use Factory
 */
export declare function runSmartCacheApi(options: SmartCacheAPIOptions): Promise<string>;
/**
 * MCP Tool Definition
 */
export declare const SMART_CACHE_API_TOOL_DEFINITION: {
    name: string;
    description: string;
    inputSchema: {
        type: string;
        properties: {
            action: {
                type: string;
                enum: string[];
                description: string;
            };
            request: {
                type: string;
                description: string;
                properties: {
                    url: {
                        type: string;
                    };
                    method: {
                        type: string;
                    };
                    headers: {
                        type: string;
                    };
                    body: {
                        type: string;
                    };
                    params: {
                        type: string;
                    };
                };
            };
            response: {
                description: string;
            };
            strategy: {
                type: string;
                enum: string[];
                description: string;
            };
            ttl: {
                type: string;
                description: string;
            };
            invalidationPattern: {
                type: string;
                enum: string[];
                description: string;
            };
            pattern: {
                type: string;
                description: string;
            };
            tags: {
                type: string;
                items: {
                    type: string;
                };
                description: string;
            };
            staleWhileRevalidate: {
                type: string;
                description: string;
            };
            staleTime: {
                type: string;
                description: string;
            };
            endpoints: {
                type: string;
                items: {
                    type: string;
                };
                description: string;
            };
            maxCacheSize: {
                type: string;
                description: string;
            };
            maxEntries: {
                type: string;
                description: string;
            };
            normalizeQuery: {
                type: string;
                description: string;
            };
            ignoreHeaders: {
                type: string;
                items: {
                    type: string;
                };
                description: string;
            };
        };
        required: string[];
    };
};
export default SmartCacheAPI;
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