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 parentDirectoryRef: Directory;
  public name: string;

  public path: string;
  public metaData: IFileMetaData;

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

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

  public async getContentAsBuffer() {
    const done = plugins.smartpromise.defer();
    const fileStream = await this.parentDirectoryRef.bucketRef.smartbucketRef.minioClient
      .getObject(this.parentDirectoryRef.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.parentDirectoryRef.bucketRef.smartbucketRef.minioClient.removeObject(
      this.parentDirectoryRef.bucketRef.name,
      this.path
    );
    await this.parentDirectoryRef.listFiles();
  }
}