import { Injectable } from '@angular/core'
import { Subject } from 'rxjs/Subject'

import * as WebTorrent from 'webtorrent'

@Injectable()
export class WebTorrentService {
  errors = new Subject<Error>()
  warnings = new Subject<Error>()

  // TODO: use WebTorrent @type
  // private client: WebTorrent.Client
  private client: any

  constructor () {
    this.client = new WebTorrent({ dht: false })

    this.client.on('error', (err) => this.errors.next(err))
    this.client.on('warning', (err) => this.warnings.next(err))
  }

  add (magnetUri: string, callback: Function) {
    return this.client.add(magnetUri, callback)
  }

  remove (magnetUri: string) {
    return this.client.remove(magnetUri)
  }

  has (magnetUri: string) {
    return this.client.get(magnetUri) !== null
  }
}