import { ConfigService } from '@nestjs/config';
import type { IFileStorage } from '../../domain/ports/file-storage.port.js';
import { LocalFileStorage } from './local-file-storage.js';
import { S3FileStorage } from './s3-file-storage.js';

/** FILE_STORAGE=s3 — S3-совместимое хранилище, иначе локальный диск */
export function createFileStorage(config: ConfigService): IFileStorage {
  const driver = config.get<string>('FILE_STORAGE', 'local');

  if (driver === 's3') {
    return new S3FileStorage({
      endpoint: config.get<string>('S3_ENDPOINT') || undefined,
      region: config.get<string>('S3_REGION', 'us-east-1'),
      bucket: config.getOrThrow<string>('S3_BUCKET'),
      accessKeyId: config.getOrThrow<string>('S3_ACCESS_KEY_ID'),
      secretAccessKey: config.getOrThrow<string>('S3_SECRET_ACCESS_KEY'),
      forcePathStyle: config.get<string>('S3_FORCE_PATH_STYLE', 'true') !== 'false',
    });
  }

  if (driver !== 'local') {
    throw new Error(`Неизвестный FILE_STORAGE=${driver}, ожидается local | s3`);
  }

  return new LocalFileStorage(config.get<string>('FILE_STORAGE_LOCAL_DIR', './storage'));
}