/**
 * Storage Chunked Upload Configuration
 *
 * Configuration constants for multipart/chunked file uploads.
 * Used by adapters that support chunked uploads (R2, Supabase, S3).
 *
 * @module @plyaz/config/storage/chunked-upload
 */
/**
 * Chunk size configuration for multipart uploads
 * Based on S3/R2 limits: 5MB min, 5GB max per part, 10,000 parts max
 */
export declare const STORAGE_CHUNK_SIZE: {
    readonly MIN: number;
    readonly MAX: number;
    readonly DEFAULT_SMALL: number;
    readonly DEFAULT_MEDIUM: number;
    readonly DEFAULT_LARGE: number;
    readonly DEFAULT_HUGE: number;
};
/**
 * File size thresholds for determining chunk strategy
 */
export declare const STORAGE_FILE_SIZE_THRESHOLDS: {
    readonly SMALL: number;
    readonly MEDIUM: 1073741824;
    readonly LARGE: number;
    readonly CHUNKED_UPLOAD: number;
};
/**
 * Check if file should use chunked upload based on size
 *
 * @param file - File buffer or stream
 * @param threshold - Size threshold in bytes (defaults to 100MB)
 * @returns True if file should use chunked upload
 *
 * @example
 * ```typescript
 * const shouldChunk = shouldUseStorageChunkedUpload(fileBuffer);
 * const shouldChunkCustom = shouldUseStorageChunkedUpload(fileBuffer, 50 * 1024 * 1024);
 * ```
 */
export declare function shouldUseStorageChunkedUpload(file: globalThis.Buffer | globalThis.NodeJS.ReadableStream | null | undefined, threshold?: number): boolean;
/**
 * Get optimal chunk size based on file size
 * Follows S3/R2 limits: 5MB min, 5GB max per part, 10,000 parts max
 *
 * @param totalSize - Total file size in bytes
 * @returns Optimal chunk size in bytes
 *
 * @example
 * ```typescript
 * const chunkSize = getStorageOptimalChunkSize(50 * 1024 * 1024); // 50MB file
 * console.log(chunkSize); // 5242880 (5MB)
 * ```
 */
export declare function getStorageOptimalChunkSize(totalSize: number): number;
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