/**
 * Sharp Image Processing Plugin
 * Automatically resize, optimize, and generate thumbnails for uploaded images
 *
 * @module @plyaz/storage/plugins/image-processing
 *
 * @example
 * ```typescript
 * import { SharpImagePlugin } from '@plyaz/storage/plugins';
 *
 * const imagePlugin = new SharpImagePlugin({
 *   variants: [
 *     { name: 'thumbnail', width: 150, height: 150, fit: 'cover' },
 *     { name: 'medium', width: 800, height: 600, fit: 'inside' },
 *     { name: 'large', width: 1920, height: 1080, fit: 'inside' },
 *   ],
 *   formats: ['webp', 'jpeg'],
 *   quality: 85,
 *   stripMetadata: true,
 *   priority: 50,
 * });
 *
 * const service = new StorageService({
 *   adapters: [adapter],
 *   plugins: [imagePlugin],
 * });
 * ```
 */
import { BasePlugin } from '../../base/BasePlugin';
import type { StoragePluginUploadResult, StoragePluginContext, StoragePluginHealth, SharpImagePluginConfig, StorageImageProcessingPluginStatistics } from '@plyaz/types/storage';
/**
 * Sharp Image Processing Plugin
 * Production-ready image processing using Sharp library
 *
 * Features:
 * - Multiple variant generation (thumbnail, medium, large)
 * - Format conversion (JPEG, PNG, WEBP, AVIF)
 * - Quality optimization
 * - Watermark overlay
 * - Metadata stripping for privacy
 * - High-performance processing
 */
export declare class SharpImagePlugin extends BasePlugin {
    private readonly variants;
    private readonly formats;
    private readonly quality;
    private readonly stripMetadata;
    private readonly watermark?;
    private readonly supportedMimeTypes;
    private readonly uploadVariants;
    private readonly preserveOriginal;
    private watermarkBuffer?;
    private imagesProcessed;
    private variantsGenerated;
    constructor(config?: SharpImagePluginConfig);
    /**
     * Initialize the plugin - load watermark if configured
     */
    initialize(): Promise<void>;
    /**
     * Load watermark image
     */
    private loadWatermark;
    /**
     * Process image after upload - generate variants
     */
    afterUpload(result: StoragePluginUploadResult, context: StoragePluginContext): Promise<void>;
    /**
     * Generate all configured variants
     */
    private generateVariants;
    /**
     * Process a single variant
     */
    private processVariant;
    /**
     * Apply watermark to image
     */
    private applyWatermark;
    /**
     * Calculate watermark position
     */
    private calculateWatermarkPosition;
    /**
     * Upload variants back to storage
     */
    private uploadVariantsToStorage;
    /**
     * Generate variant filename
     */
    private generateVariantFilename;
    /**
     * Check if file is an image
     */
    private isImageFile;
    /**
     * Health check
     */
    healthCheck(): Promise<StoragePluginHealth>;
    /**
     * Get processing statistics
     */
    getStatistics(): StorageImageProcessingPluginStatistics;
}