import { createHash } from 'crypto';

/**
 * Versão simplificada do MetadataCollector para quando faltam dependências
 */
export class FallbackMetadataCollector {
  /**
   * Coleta metadados básicos a partir dos dados fornecidos
   */
  async collectMetadata(data: {
    userAgent: string;
    ipAddress: string;
    timestamp: Date;
    fileName: string;
    fileSize: number;
    [key: string]: any;
  }) {
    const timestamp = new Date();
    
    // Retornar metadados simplificados
    return {
      timestamp: timestamp.toISOString(),
      collectionTime: timestamp.toISOString(),
      userAgent: data.userAgent,
      ipAddress: data.ipAddress,
      fileName: data.fileName,
      fileSize: data.fileSize,
      fileSizeFormatted: this.formatFileSize(data.fileSize),
      integrityHash: this.generateHash(data.fileName, data.fileSize.toString(), timestamp.toISOString())
    };
  }
  
  private formatFileSize(bytes: number): string {
    if (bytes < 1024) return bytes + ' bytes';
    else if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(2) + ' KB';
    else if (bytes < 1024 * 1024 * 1024) return (bytes / (1024 * 1024)).toFixed(2) + ' MB';
    else return (bytes / (1024 * 1024 * 1024)).toFixed(2) + ' GB';
  }
  
  private generateHash(...values: string[]): string {
    return createHash('sha256')
      .update(values.join('|'))
      .digest('hex');
  }
}