import * as plugins from './smartbucket.plugins';
import { Bucket } from './smartbucket.classes.bucket';
import { File } from './smartbucket.classes.file';

export class Directory {
  public bucketRef: Bucket;
  public parentDirectoryRef: Directory;
  public name: string;

  public tree: string[];
  public files: string[];
  public folders: string[];

  constructor(bucketRefArg: Bucket, parentDiretory: Directory, name: string) {
    this.bucketRef = bucketRefArg;
    this.parentDirectoryRef = parentDiretory;
    this.name = name;
  }

  /**
   * returns an array of parent directories
   */
  public getParentDirectories(): Directory[] {
    let parentDirectories: Directory[] = [];
    if (this.parentDirectoryRef) {
      parentDirectories.push(this.parentDirectoryRef);
      parentDirectories = parentDirectories.concat(this.parentDirectoryRef.getParentDirectories());
    }
    return parentDirectories;
  }

  /**
   * returns the directory level
   */
  public getDirectoryLevel(): number {
    return this.getParentDirectories().length;
  }

  /**
   * updates the base path
   */
  public getBasePath(): string {
    const parentDirectories = this.getParentDirectories();
    let basePath = '';
    for (const parentDir of parentDirectories) {
      if (parentDir.name === '') {
        basePath = this.name;
        continue;
      }
      basePath = parentDir.name + '/' + this.name;
    }
    return basePath;
  }

  /**
   * lists all files
   */
  public async listFiles(): Promise<File[]> {
    const done = plugins.smartpromise.defer();
    const fileNameStream = await this.bucketRef.smartbucketRef.minioClient.listObjectsV2(
      this.bucketRef.name,
      this.getBasePath()
    );
    const fileArray: File[] = [];
    const duplexStream = plugins.streamfunction.createDuplexStream<plugins.minio.BucketItem, void>(
      async bucketItem => {
        if (!bucketItem.name) {
          return;
        }
        let subtractedPath = bucketItem.name.replace(this.getBasePath(), '');
        if (subtractedPath.startsWith('/')) {
          subtractedPath = subtractedPath.substr(1);
        }
        if (!subtractedPath.includes('/')) {
          fileArray.push(new File(this, subtractedPath));
        }
      },
      async tools => {
        done.resolve();
      }
    );
    fileNameStream.pipe(duplexStream);
    await done.promise;
    return fileArray;
  }

  /**
   * lists all folders
   */
  public async listDirectories(): Promise<Directory[]> {
    const done = plugins.smartpromise.defer();
    const completeDirStream = await this.bucketRef.smartbucketRef.minioClient.listObjectsV2(
      this.bucketRef.name,
      this.getBasePath(),
      true
    );
    const directoryArray: Directory[] = [];
    const duplexStream = plugins.streamfunction.createDuplexStream<plugins.minio.BucketItem, void>(
      async bucketItem => {
        let subtractedPath = bucketItem.name.replace(this.getBasePath(), '');
        if (subtractedPath.startsWith('/')) {
          subtractedPath = subtractedPath.substr(1);
        }
        if (subtractedPath.includes('/')) {
          const dirName = subtractedPath.split('/')[0];
          if (directoryArray.find(directory => directory.name === dirName)) {
            return;
          }
          directoryArray.push(new Directory(this.bucketRef, this, dirName));
        }
      },
      async tools => {
        done.resolve();
      }
    );
    completeDirStream.pipe(duplexStream);
    await done.promise;
    return directoryArray;
  }

  /**
   * gets an array that has all objects with a certain prefix;
   */
  public async getTreeArray() {
    const treeArray = await this.bucketRef.smartbucketRef.minioClient.listObjectsV2(
      this.bucketRef.name,
      this.getBasePath(),
      true
    );
  }

  /**
   * gets a sub directory
   */
  public async getSubDirectoryByName(dirNameArg: string): Promise<Directory> {
    const dirNameArray = dirNameArg.split('/');

    const getDirectory = async (directoryArg: Directory, dirNameToSearch: string) => {
      const directories = await directoryArg.listDirectories();
      return directories.find(directory => {
        return directory.name === dirNameToSearch;
      });
    };
    let wantedDirectory: Directory;
    for (const dirNameToSearch of dirNameArray) {
      const directoryToSearchIn = wantedDirectory ? wantedDirectory : this;
      wantedDirectory = await getDirectory(directoryToSearchIn, dirNameToSearch);
    }
    return wantedDirectory;
  }

  /**
   * moves the directory
   */
  public async move() {
    // TODO
  }

  /**
   * creates a file within this directory
   * @param relativePathArg
   */
  public async createFile(relativePathArg) {
    let completeFilePath: string = '';
  }

  // file operations
  public async fastStore(pathArg: string, contentArg: string) {
    const path = plugins.path.join(this.getBasePath(), pathArg);
    await this.bucketRef.fastStore(path, contentArg);
  }

  public async fastGet(pathArg: string) {
    const path = plugins.path.join(this.getBasePath(), pathArg);
    const result = await this.bucketRef.fastGet(path);
    return result;
  }

  public async fastGetStream(pathArg: string): Promise<plugins.smartrx.rxjs.ReplaySubject<string>> {
    const path = plugins.path.join(this.getBasePath(), pathArg);
    const result = await this.bucketRef.fastGetStream(path);
    return result;
  }

  public async fastRemove(pathArg: string) {
    const path = plugins.path.join(this.getBasePath(), pathArg);
    await this.bucketRef.fastRemove(path);
  }
}