import { SortMeta } from 'primeng/api'
import { Observable } from 'rxjs'
import { catchError, map, switchMap } from 'rxjs/operators'
import { HttpClient, HttpParams } from '@angular/common/http'
import { Injectable } from '@angular/core'
import { RestExtractor, RestPagination, RestService, ServerService, UserService } from '@app/core'
import { objectToFormData } from '@app/helpers'
import { peertubeTranslate } from '@shared/core-utils/i18n'
import { ResultList, VideoImport, VideoImportCreate, VideoUpdate } from '@shared/models'
import { environment } from '../../../../environments/environment'

@Injectable()
export class VideoImportService {
  private static BASE_VIDEO_IMPORT_URL = environment.apiUrl + '/api/v1/videos/imports/'

  constructor (
    private authHttp: HttpClient,
    private restService: RestService,
    private restExtractor: RestExtractor,
    private serverService: ServerService
  ) {}

  importVideoUrl (targetUrl: string, video: VideoUpdate): Observable<VideoImport> {
    const url = VideoImportService.BASE_VIDEO_IMPORT_URL

    const body = this.buildImportVideoObject(video)
    body.targetUrl = targetUrl

    const data = objectToFormData(body)
    return this.authHttp.post<VideoImport>(url, data)
               .pipe(catchError(res => this.restExtractor.handleError(res)))
  }

  importVideoTorrent (target: string | Blob, video: VideoUpdate): Observable<VideoImport> {
    const url = VideoImportService.BASE_VIDEO_IMPORT_URL
    const body: VideoImportCreate = this.buildImportVideoObject(video)

    if (typeof target === 'string') body.magnetUri = target
    else body.torrentfile = target

    const data = objectToFormData(body)
    return this.authHttp.post<VideoImport>(url, data)
               .pipe(catchError(res => this.restExtractor.handleError(res)))
  }

  getMyVideoImports (pagination: RestPagination, sort: SortMeta, search?: string): Observable<ResultList<VideoImport>> {
    let params = new HttpParams()
    params = this.restService.addRestGetParams(params, pagination, sort)

    if (search) {
      const filters = this.restService.parseQueryStringFilter(search, {
        videoChannelSyncId: {
          prefix: 'videoChannelSyncId:'
        },
        targetUrl: {
          prefix: 'targetUrl:'
        }
      })

      params = this.restService.addObjectParams(params, filters)
    }

    return this.authHttp
               .get<ResultList<VideoImport>>(UserService.BASE_USERS_URL + '/me/videos/imports', { params })
               .pipe(
                 switchMap(res => this.extractVideoImports(res)),
                 catchError(err => this.restExtractor.handleError(err))
               )
  }

  deleteVideoImport (videoImport: VideoImport) {
    return this.authHttp.delete(VideoImportService.BASE_VIDEO_IMPORT_URL + videoImport.id)
                        .pipe(catchError(err => this.restExtractor.handleError(err)))
  }

  cancelVideoImport (videoImport: VideoImport) {
    return this.authHttp.post(VideoImportService.BASE_VIDEO_IMPORT_URL + videoImport.id + '/cancel', {})
                        .pipe(catchError(err => this.restExtractor.handleError(err)))
  }

  private buildImportVideoObject (video: VideoUpdate): VideoImportCreate {
    const language = video.language || null
    const licence = video.licence || null
    const category = video.category || null
    const description = video.description || null
    const support = video.support || null
    const scheduleUpdate = video.scheduleUpdate || null
    const importedFrom = video.importedFrom || null
    const originallyPublishedAt = video.originallyPublishedAt || null

    return {
      name: video.name,
      category,
      licence,
      language,
      support,
      description,
      channelId: video.channelId,
      privacy: video.privacy,
      tags: video.tags,
      nsfw: video.nsfw,
      waitTranscoding: video.waitTranscoding,
      commentsEnabled: video.commentsEnabled,
      downloadEnabled: video.downloadEnabled,
      thumbnailfile: video.thumbnailfile,
      previewfile: video.previewfile,
      scheduleUpdate,
      importedFrom,
      originallyPublishedAt
    }
  }

  private extractVideoImports (result: ResultList<VideoImport>): Observable<ResultList<VideoImport>> {
    return this.serverService.getServerLocale()
               .pipe(
                 map(translations => {
                   result.data.forEach(d =>
                     d.state.label = peertubeTranslate(d.state.label, translations)
                   )

                   return result
                 })
               )
  }
}