import * as plugins from './smartbucket.plugins';
import { Directory } from './smartbucket.classes.directory';

export interface IFileMetaData {
  name: string;
  fileType: string;
  size: string;
}

export class File {
  // STATIC
  public static async createFileFromString(
    dirArg: Directory,
    fileName: string,
    fileContent: string
  ) {
    await this.createFileFromBuffer(
      dirArg,
      fileName,
      Buffer.from(fileContent)
    );
  }

  public static async createFileFromBuffer(
    directoryRef: Directory,
    fileName: string,
    fileContent: Buffer
  ) {
    const filePath = plugins.path.join(directoryRef.getBasePath(), fileName);
    const streamIntake = new plugins.streamfunction.Intake();
    const putPromise = directoryRef.bucketRef.smartbucketRef.minioClient
      .putObject(this.name, filePath, streamIntake.getReadable())
      .catch(e => console.log(e));
    streamIntake.pushData(fileContent);
    streamIntake.signalEnd();
    await putPromise;
  }

  // INSTANCE
  public directoryRef: Directory;

  public path: string;
  public metaData: IFileMetaData;

  constructor(directoryRefArg: Directory, fileName: string) {
    this.directoryRef = directoryRefArg;
  }

  public async getContentAsString() {
    const fileBuffer = await this.getContentAsBuffer();
    return fileBuffer.toString();
  }

  public async getContentAsBuffer() {
    const done = plugins.smartpromise.defer();
    const fileStream = await this.directoryRef.bucketRef.smartbucketRef.minioClient.getObject(this.directoryRef.bucketRef.name, this.path).catch(e => console.log(e));
    let completeFile = new Buffer('');
    const duplexStream = plugins.streamfunction.createDuplexStream<Buffer, Buffer>(async (chunk) => {
      completeFile = Buffer.concat([chunk]);
      return chunk;
    }, async (cb) => {
      done.resolve();
      return Buffer.from('');
    });

    if (!fileStream) {
      return null;
    }

    fileStream.pipe(duplexStream);
    await done.promise;
    return completeFile;
  }

  public async streamContent() {
    throw new Error('not yet implemented');
    // TODO
  }

  /**
   * removes this file
   */
  public async remove () {
    await this.directoryRef.bucketRef.smartbucketRef.minioClient.removeObject(this.directoryRef.bucketRef.name, this.path);
    await this.directoryRef.listFiles();
  }
}