/**
 * File Storage Engine - CBD Universal Data Platform
 * 6th Paradigm: File/Blob Storage with AI Intelligence
 *
 * Features:
 * - Multi-cloud file storage (AWS S3, Azure Blob, GCP Storage)
 * - AI-powered content analysis and indexing
 * - Intelligent cloud selection and cost optimization
 * - Seamless integration with structured data paradigms
 * - Universal search across all data types
 */
import { Buffer } from 'buffer';
import { EventEmitter } from 'events';
export interface FileDocument {
    readonly id?: string;
    readonly filename: string;
    readonly contentType: string;
    readonly size: number;
    readonly content: Buffer;
    readonly metadata?: Record<string, any>;
    readonly tags?: string[];
    readonly bucket?: string;
}
export interface FileResult {
    readonly id: string;
    readonly filename: string;
    readonly contentType: string;
    readonly size: number;
    readonly url: string;
    readonly cdnUrl?: string;
    readonly hash: string;
    readonly metadata: FileMetadata;
    readonly timestamp: Date;
    readonly cloudProvider?: string;
    readonly bucket: string;
}
export interface FileMetadata {
    readonly contentType: string;
    readonly size: number;
    readonly hash: string;
    readonly lastModified: Date;
    readonly tags: string[];
    readonly analysis?: ContentAnalysis;
    readonly custom?: Record<string, any>;
}
export interface ContentAnalysis {
    readonly textContent?: string;
    readonly language?: string;
    readonly sentiment?: number;
    readonly keywords: string[];
    readonly categories: string[];
    readonly confidence: number;
    readonly embeddings?: number[];
    readonly duplicateOf?: string;
}
export interface FileSearchOptions {
    readonly limit?: number;
    readonly offset?: number;
    readonly contentType?: string;
    readonly tags?: string[];
    readonly similarity?: number;
    readonly includeContent?: boolean;
}
export interface FileSearchResult {
    readonly files: FileResult[];
    readonly total: number;
    readonly searchTime: number;
    readonly query: string;
}
export interface CloudStorageAdapter {
    store(bucket: string, key: string, file: Buffer, metadata: FileMetadata): Promise<CloudStorageResult>;
    retrieve(bucket: string, key: string): Promise<Buffer>;
    delete(bucket: string, key: string): Promise<boolean>;
    exists(bucket: string, key: string): Promise<boolean>;
    list(bucket: string, prefix?: string): Promise<string[]>;
}
export interface CloudStorageResult {
    readonly url: string;
    readonly cloudProvider: string;
    readonly region: string;
    readonly storageClass?: string;
    readonly requestId: string;
}
export declare class FileStorageEngine extends EventEmitter {
    private fileStore;
    private buckets;
    private contentAnalyzer;
    private cloudSelector;
    private _cloudAdapters;
    constructor();
    private initializeCloudAdapters;
    initialize(): Promise<void>;
    upload(bucket: string, file: FileDocument): Promise<FileResult>;
    download(bucket: string, key: string): Promise<FileResult | null>;
    getContent(bucket: string, key: string): Promise<Buffer | null>;
    delete(bucket: string, key: string): Promise<boolean>;
    list(bucket: string, prefix?: string): Promise<FileResult[]>;
    search(bucket: string, query: string, options?: FileSearchOptions): Promise<FileSearchResult>;
    getStats(): Record<string, any>;
    private storeInCloud;
    private deleteFromCloud;
    private selectStorageClass;
    private calculateRelevanceScore;
    private getContentTypeStats;
    private getCloudProviderStats;
}
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