/**
 * Cloudflare CDN Plugin
 * Automatically invalidates Cloudflare CDN cache when files are deleted or updated
 *
 * @module @plyaz/storage/plugins/cloudflare-cdn
 *
 * @example
 * ```typescript
 * import { CloudflareCDNPlugin } from '@plyaz/storage/plugins';
 *
 * const plugin = new CloudflareCDNPlugin({
 *   zoneId: process.env.CLOUDFLARE_ZONE_ID!,
 *   apiToken: process.env.CLOUDFLARE_API_TOKEN!,
 *   baseUrl: 'https://cdn.example.com',
 *   priority: 20,
 * });
 * ```
 */
import { BasePlugin } from '../../../base/BasePlugin';
import type { StoragePluginUploadResult, StoragePluginContext, StoragePluginHealth, StoragePluginDeleteResult, CloudflareCDNPluginConfig, StorageCDNPluginStatistics } from '@plyaz/types/storage';
/**
 * Cloudflare CDN Plugin
 * Automatically purges Cloudflare CDN cache when files change
 *
 * Features:
 * - Automatic cache purging on delete/update
 * - Batch processing (up to 30 URLs per request)
 * - Retry logic for failed purges
 * - Health monitoring
 */
export declare class CloudflareCDNPlugin extends BasePlugin {
    private readonly zoneId;
    private readonly apiToken;
    private readonly baseUrl?;
    private readonly invalidateOnDelete;
    private readonly invalidateOnUpdate;
    private readonly batchSize;
    private readonly retryAttempts;
    private readonly retryDelay;
    private readonly urlGenerator?;
    private invalidationsPerformed;
    private invalidationsFailed;
    private urlsInvalidated;
    private readonly invalidationQueue;
    private flushTimer;
    constructor(config: CloudflareCDNPluginConfig);
    /**
     * Invalidate cache after file deletion
     */
    afterDelete(result: StoragePluginDeleteResult, _context: StoragePluginContext): Promise<void>;
    /**
     * Invalidate cache after file upload/update
     */
    afterUpload(result: StoragePluginUploadResult, _context: StoragePluginContext): Promise<void>;
    /**
     * Generate URLs to invalidate
     */
    private generateUrls;
    /**
     * Queue URLs for batch invalidation
     */
    private queueInvalidation;
    /**
     * Flush invalidation queue
     */
    private flushQueue;
    /**
     * Sleep helper
     */
    private sleep;
    /**
     * Cleanup when plugin is destroyed
     */
    destroy(): Promise<void>;
    /**
     * Health check
     */
    healthCheck(): Promise<StoragePluginHealth>;
    /**
     * Get statistics
     */
    getStatistics(): StorageCDNPluginStatistics;
}