/**
 * Fastly CDN Plugin
 * Automatically invalidates Fastly CDN cache when files are deleted or updated
 *
 * @module @plyaz/storage/plugins/fastly-cdn
 *
 * @example
 * ```typescript
 * import { FastlyCDNPlugin } from '@plyaz/storage/plugins';
 *
 * const plugin = new FastlyCDNPlugin({
 *   serviceId: process.env.FASTLY_SERVICE_ID!,
 *   apiToken: process.env.FASTLY_API_TOKEN!,
 *   baseUrl: 'https://cdn.example.com',
 *   priority: 20,
 * });
 * ```
 */
import { BasePlugin } from '../../../base/BasePlugin';
import type { StoragePluginUploadResult, StoragePluginContext, StoragePluginHealth, StoragePluginDeleteResult, FastlyCDNPluginConfig, StorageCDNPluginStatistics } from '@plyaz/types/storage';
/**
 * Fastly CDN Plugin
 * Automatically purges Fastly CDN cache when files change
 *
 * Features:
 * - Automatic cache purging on delete/update
 * - Individual URL purging (Fastly purges one URL at a time)
 * - Retry logic
 * - Health monitoring
 *
 * Note: Fastly purges URLs individually, not in batches
 */
export declare class FastlyCDNPlugin extends BasePlugin {
    private readonly serviceId;
    private readonly apiToken;
    private readonly baseUrl?;
    private readonly invalidateOnDelete;
    private readonly invalidateOnUpdate;
    private readonly retryAttempts;
    private readonly retryDelay;
    private readonly urlGenerator?;
    private invalidationsPerformed;
    private invalidationsFailed;
    private urlsInvalidated;
    constructor(config: FastlyCDNPluginConfig);
    afterDelete(result: StoragePluginDeleteResult, _context: StoragePluginContext): Promise<void>;
    afterUpload(result: StoragePluginUploadResult, _context: StoragePluginContext): Promise<void>;
    private generateUrls;
    /**
     * Purge URLs individually (Fastly purges one at a time)
     */
    private purgeUrls;
    /**
     * Purge single URL with retry logic
     */
    private purgeUrlWithRetry;
    private sleep;
    healthCheck(): Promise<StoragePluginHealth>;
    getStatistics(): StorageCDNPluginStatistics;
}