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

export class Bucket {
  public static async getBucketByName(smartbucketRef: SmartBucket, bucketNameArg: string) {
    const buckets = await smartbucketRef.minioClient.listBuckets();
    const foundBucket = buckets.find(bucket => {
      return bucket.name === bucketNameArg;
    });

    if (foundBucket) {
      console.log(`bucket with name ${bucketNameArg} exists.`)
      console.log(`Taking this as base for new Bucket instance`);
      return new this(smartbucketRef, bucketNameArg);
    } else {
      return null;
    }
  }

  public static async createBucketByName(smartbucketRef: SmartBucket, bucketName: string) {
    await smartbucketRef.minioClient.makeBucket(bucketName, 'ams3').catch(e => console.log(e));
    return new Bucket(smartbucketRef, bucketName);
  }

  public static async removeBucketByName(smartbucketRef: SmartBucket, bucketName: string) {
    await smartbucketRef.minioClient.removeBucket(bucketName).catch(e => console.log(e));
  }

  public smartbucketRef: SmartBucket;
  public name: string;

  constructor(smartbucketRef: SmartBucket, bucketName: string) {
    this.smartbucketRef = smartbucketRef;
    this.name = bucketName;
  }

  
  // ===============
  // Fast Operations
  // ===============

  /**
   * store file
   */
  public async fastStore(pathArg: string, fileContent: string) {
    const streamIntake = new plugins.streamfunction.Intake();
    const putPromise = this.smartbucketRef.minioClient.putObject(this.name, pathArg, streamIntake.getReadable()).catch(e => console.log(e));
    streamIntake.pushData(fileContent);
    streamIntake.signalEnd();
    await putPromise;
  }

  /**
   * get file
   */
  public async fastGet(pathArg: string) {
    const done = plugins.smartpromise.defer();
    const fileStream = await this.smartbucketRef.minioClient.getObject(this.name, pathArg).catch(e => console.log(e));
    let completeFile: string = '';
    const duplexStream = plugins.streamfunction.createDuplexStream<Buffer, Buffer>(async (chunk) => {
      const chunkString = chunk.toString();
      completeFile += chunkString;
      return chunk;
    }, async (cb) => {
      done.resolve();
      return Buffer.from('');
    });

    if (!fileStream) {
      return null;
    }

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

  /**
   * removeObject
   */
  public async fastRemove (pathArg: string) {
    await this.smartbucketRef.minioClient.removeObject(this.name, pathArg);
  }
}