import * as Bull from 'bull'
import { logger } from '../../../helpers/logger'
import { VideoModel } from '../../../models/video/video'
import { publishNewResolutionIfNeeded } from './video-transcoding'
import { getVideoFileFPS, getVideoFileResolution } from '../../../helpers/ffmpeg-utils'
import { copy, stat } from 'fs-extra'
import { VideoFileModel } from '../../../models/video/video-file'
import { extname } from 'path'

export type VideoFileImportPayload = {
  videoUUID: string,
  filePath: string
}

async function processVideoFileImport (job: Bull.Job) {
  const payload = job.data as VideoFileImportPayload
  logger.info('Processing video file import in job %d.', job.id)

  const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(payload.videoUUID)
  // No video, maybe deleted?
  if (!video) {
    logger.info('Do not process job %d, video does not exist.', job.id)
    return undefined
  }

  await updateVideoFile(video, payload.filePath)

  await publishNewResolutionIfNeeded(video)
  return video
}

// ---------------------------------------------------------------------------

export {
  processVideoFileImport
}

// ---------------------------------------------------------------------------

async function updateVideoFile (video: VideoModel, inputFilePath: string) {
  const { videoFileResolution } = await getVideoFileResolution(inputFilePath)
  const { size } = await stat(inputFilePath)
  const fps = await getVideoFileFPS(inputFilePath)

  let updatedVideoFile = new VideoFileModel({
    resolution: videoFileResolution,
    extname: extname(inputFilePath),
    size,
    fps,
    videoId: video.id
  })

  const currentVideoFile = video.VideoFiles.find(videoFile => videoFile.resolution === updatedVideoFile.resolution)

  if (currentVideoFile) {
    // Remove old file and old torrent
    await video.removeFile(currentVideoFile)
    await video.removeTorrent(currentVideoFile)
    // Remove the old video file from the array
    video.VideoFiles = video.VideoFiles.filter(f => f !== currentVideoFile)

    // Update the database
    currentVideoFile.set('extname', updatedVideoFile.extname)
    currentVideoFile.set('size', updatedVideoFile.size)
    currentVideoFile.set('fps', updatedVideoFile.fps)

    updatedVideoFile = currentVideoFile
  }

  const outputPath = video.getVideoFilePath(updatedVideoFile)
  await copy(inputFilePath, outputPath)

  await video.createTorrentAndSetInfoHash(updatedVideoFile)

  await updatedVideoFile.save()

  video.VideoFiles.push(updatedVideoFile)
}