import { ScraperPlugin, ScraperEngine } from '../core/types';
/**
 * Retry plugin with exponential backoff
 */
export declare class RetryPlugin implements ScraperPlugin {
    name: string;
    version: string;
    private maxBackoffDelay;
    private backoffMultiplier;
    constructor(options?: {
        maxBackoffDelay?: number;
        backoffMultiplier?: number;
    });
    install(scraper: ScraperEngine): void;
    private handleRetry;
}
/**
 * Cache plugin for caching scraper results
 */
export declare class CachePlugin implements ScraperPlugin {
    name: string;
    version: string;
    private cache;
    private defaultTtl;
    constructor(options?: {
        defaultTtl?: number;
    });
    install(scraper: ScraperEngine): void;
    private checkCache;
    private storeInCache;
    private generateCacheKey;
    /**
     * Clear cache
     */
    clearCache(): void;
    /**
     * Get cache statistics
     */
    getCacheStats(): {
        size: number;
        keys: string[];
    };
}
/**
 * Proxy rotation plugin
 */
export declare class ProxyPlugin implements ScraperPlugin {
    name: string;
    version: string;
    private proxies;
    private currentIndex;
    constructor(proxies: string[]);
    install(scraper: ScraperEngine): void;
    private setProxy;
    /**
     * Add proxy to the rotation
     */
    addProxy(proxy: string): void;
    /**
     * Remove proxy from rotation
     */
    removeProxy(proxy: string): void;
    /**
     * Get current proxy list
     */
    getProxies(): string[];
}
/**
 * Rate limiting plugin
 */
export declare class RateLimitPlugin implements ScraperPlugin {
    name: string;
    version: string;
    private requests;
    private defaultLimit;
    private defaultWindow;
    constructor(options?: {
        defaultLimit?: number;
        defaultWindow?: number;
    });
    install(scraper: ScraperEngine): void;
    private checkRateLimit;
    /**
     * Get rate limit statistics
     */
    getStats(): Record<string, {
        requests: number;
        window: number;
    }>;
}
/**
 * Metrics plugin for collecting scraper metrics
 */
export declare class MetricsPlugin implements ScraperPlugin {
    name: string;
    version: string;
    private metrics;
    install(scraper: ScraperEngine): void;
    private recordStart;
    private recordSuccess;
    private recordError;
    private recordDuration;
    /**
     * Get metrics
     */
    getMetrics(): typeof this.metrics;
    /**
     * Reset metrics
     */
    resetMetrics(): void;
}
//# sourceMappingURL=index.d.ts.map