import express, { UploadFiles } from 'express'
import { move } from 'fs-extra/esm'
import { basename } from 'path'
import { getResumableUploadPath } from '@server/helpers/upload.js'
import { getLocalVideoActivityPubUrl } from '@server/lib/activitypub/url.js'
import { CreateJobArgument, CreateJobOptions, JobQueue } from '@server/lib/job-queue/index.js'
import { Redis } from '@server/lib/redis.js'
import { uploadx } from '@server/lib/uploadx.js'
import { buildLocalVideoFromReq, buildMoveJob, buildVideoThumbnailsFromReq, setVideoTags } from '@server/lib/video.js'
import { buildNewFile } from '@server/lib/video-file.js'
import { VideoPathManager } from '@server/lib/video-path-manager.js'
import { buildNextVideoState } from '@server/lib/video-state.js'
import { openapiOperationDoc } from '@server/middlewares/doc.js'
import { VideoPasswordModel } from '@server/models/video/video-password.js'
import { VideoSourceModel } from '@server/models/video/video-source.js'
import { MVideoFile, MVideoFullLight, MVideoThumbnail } from '@server/types/models/index.js'
import { uuidToShort } from '@peertube/peertube-node-utils'
import { HttpStatusCode, ThumbnailType, VideoCreate, VideoPrivacy, VideoState } from '@peertube/peertube-models'
import { auditLoggerFactory, getAuditIdFromRes, VideoAuditView } from '../../../helpers/audit-logger.js'
import { createReqFiles } from '../../../helpers/express-utils.js'
import { logger, loggerTagsFactory } from '../../../helpers/logger.js'
import { CONSTRAINTS_FIELDS, MIMETYPES } from '../../../initializers/constants.js'
import { sequelizeTypescript } from '../../../initializers/database.js'
import { Hooks } from '../../../lib/plugins/hooks.js'
import { generateLocalVideoMiniature } from '../../../lib/thumbnail.js'
import { autoBlacklistVideoIfNeeded } from '../../../lib/video-blacklist.js'
import {
  asyncMiddleware,
  asyncRetryTransactionMiddleware,
  authenticate,
  videosAddLegacyValidator,
  videosAddResumableInitValidator,
  videosAddResumableValidator
} from '../../../middlewares/index.js'
import { ScheduleVideoUpdateModel } from '../../../models/video/schedule-video-update.js'
import { VideoModel } from '../../../models/video/video.js'
import { ffprobePromise, getChaptersFromContainer } from '@peertube/peertube-ffmpeg'
import { replaceChapters, replaceChaptersFromDescriptionIfNeeded } from '@server/lib/video-chapters.js'
import { FfprobeData } from 'fluent-ffmpeg'

const lTags = loggerTagsFactory('api', 'video')
const auditLogger = auditLoggerFactory('videos')
const uploadRouter = express.Router()

const reqVideoFileAdd = createReqFiles(
  [ 'videofile', 'thumbnailfile', 'previewfile' ],
  { ...MIMETYPES.VIDEO.MIMETYPE_EXT, ...MIMETYPES.IMAGE.MIMETYPE_EXT }
)

const reqVideoFileAddResumable = createReqFiles(
  [ 'thumbnailfile', 'previewfile' ],
  MIMETYPES.IMAGE.MIMETYPE_EXT,
  getResumableUploadPath()
)

uploadRouter.post('/upload',
  openapiOperationDoc({ operationId: 'uploadLegacy' }),
  authenticate,
  reqVideoFileAdd,
  asyncMiddleware(videosAddLegacyValidator),
  asyncRetryTransactionMiddleware(addVideoLegacy)
)

uploadRouter.post('/upload-resumable',
  openapiOperationDoc({ operationId: 'uploadResumableInit' }),
  authenticate,
  reqVideoFileAddResumable,
  asyncMiddleware(videosAddResumableInitValidator),
  (req, res) => uploadx.upload(req, res) // Prevent next() call, explicitely tell to uploadx it's the end
)

uploadRouter.delete('/upload-resumable',
  authenticate,
  asyncMiddleware(deleteUploadResumableCache),
  (req, res) => uploadx.upload(req, res) // Prevent next() call, explicitely tell to uploadx it's the end
)

uploadRouter.put('/upload-resumable',
  openapiOperationDoc({ operationId: 'uploadResumable' }),
  authenticate,
  uploadx.upload, // uploadx doesn't next() before the file upload completes
  asyncMiddleware(videosAddResumableValidator),
  asyncMiddleware(addVideoResumable)
)

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

export {
  uploadRouter
}

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

async function addVideoLegacy (req: express.Request, res: express.Response) {
  // Uploading the video could be long
  // Set timeout to 10 minutes, as Express's default is 2 minutes
  req.setTimeout(1000 * 60 * 10, () => {
    logger.error('Video upload has timed out.')
    return res.fail({
      status: HttpStatusCode.REQUEST_TIMEOUT_408,
      message: 'Video upload has timed out.'
    })
  })

  const videoPhysicalFile = req.files['videofile'][0]
  const videoInfo: VideoCreate = req.body
  const files = req.files

  const response = await addVideo({ req, res, videoPhysicalFile, videoInfo, files })

  return res.json(response)
}

async function addVideoResumable (req: express.Request, res: express.Response) {
  const videoPhysicalFile = res.locals.uploadVideoFileResumable
  const videoInfo = videoPhysicalFile.metadata
  const files = { previewfile: videoInfo.previewfile, thumbnailfile: videoInfo.thumbnailfile }

  const response = await addVideo({ req, res, videoPhysicalFile, videoInfo, files })
  await Redis.Instance.setUploadSession(req.query.upload_id, response)

  return res.json(response)
}

async function addVideo (options: {
  req: express.Request
  res: express.Response
  videoPhysicalFile: express.VideoUploadFile
  videoInfo: VideoCreate
  files: express.UploadFiles
}) {
  const { req, res, videoPhysicalFile, videoInfo, files } = options
  const videoChannel = res.locals.videoChannel
  const user = res.locals.oauth.token.User

  let videoData = buildLocalVideoFromReq(videoInfo, videoChannel.id)
  videoData = await Hooks.wrapObject(videoData, 'filter:api.video.upload.video-attribute.result')

  videoData.state = buildNextVideoState()
  videoData.duration = videoPhysicalFile.duration // duration was added by a previous middleware

  const video = new VideoModel(videoData) as MVideoFullLight
  video.VideoChannel = videoChannel
  video.url = getLocalVideoActivityPubUrl(video) // We use the UUID, so set the URL after building the object

  const ffprobe = await ffprobePromise(videoPhysicalFile.path)

  const videoFile = await buildNewFile({ path: videoPhysicalFile.path, mode: 'web-video', ffprobe })
  const originalFilename = videoPhysicalFile.originalname

  const containerChapters = await getChaptersFromContainer({
    path: videoPhysicalFile.path,
    maxTitleLength: CONSTRAINTS_FIELDS.VIDEO_CHAPTERS.TITLE.max,
    ffprobe
  })
  logger.debug(`Got ${containerChapters.length} chapters from video "${video.name}" container`, { containerChapters, ...lTags(video.uuid) })

  // Move physical file
  const destination = VideoPathManager.Instance.getFSVideoFileOutputPath(video, videoFile)
  await move(videoPhysicalFile.path, destination)
  // This is important in case if there is another attempt in the retry process
  videoPhysicalFile.filename = basename(destination)
  videoPhysicalFile.path = destination

  const thumbnails = await createThumbnailFiles({ video, files, videoFile, ffprobe })

  const { videoCreated } = await sequelizeTypescript.transaction(async t => {
    const sequelizeOptions = { transaction: t }

    const videoCreated = await video.save(sequelizeOptions) as MVideoFullLight

    for (const thumbnail of thumbnails) {
      await videoCreated.addAndSaveThumbnail(thumbnail, t)
    }

    // Do not forget to add video channel information to the created video
    videoCreated.VideoChannel = res.locals.videoChannel

    videoFile.videoId = video.id
    await videoFile.save(sequelizeOptions)

    video.VideoFiles = [ videoFile ]

    await VideoSourceModel.create({
      filename: originalFilename,
      videoId: video.id
    }, { transaction: t })

    await setVideoTags({ video, tags: videoInfo.tags, transaction: t })

    // Schedule an update in the future?
    if (videoInfo.scheduleUpdate) {
      await ScheduleVideoUpdateModel.create({
        videoId: video.id,
        updateAt: new Date(videoInfo.scheduleUpdate.updateAt),
        privacy: videoInfo.scheduleUpdate.privacy || null
      }, sequelizeOptions)
    }

    if (!await replaceChaptersFromDescriptionIfNeeded({ newDescription: video.description, video, transaction: t })) {
      await replaceChapters({ video, chapters: containerChapters, transaction: t })
    }

    await autoBlacklistVideoIfNeeded({
      video,
      user,
      isRemote: false,
      isNew: true,
      isNewFile: true,
      transaction: t
    })

    if (videoInfo.privacy === VideoPrivacy.PASSWORD_PROTECTED) {
      await VideoPasswordModel.addPasswords(videoInfo.videoPasswords, video.id, t)
    }

    auditLogger.create(getAuditIdFromRes(res), new VideoAuditView(videoCreated.toFormattedDetailsJSON()))
    logger.info('Video with name %s and uuid %s created.', videoInfo.name, videoCreated.uuid, lTags(videoCreated.uuid))

    return { videoCreated }
  })

  // Channel has a new content, set as updated
  await videoCreated.VideoChannel.setAsUpdated()

  addVideoJobsAfterUpload(videoCreated, videoFile)
    .catch(err => logger.error('Cannot build new video jobs of %s.', videoCreated.uuid, { err, ...lTags(videoCreated.uuid) }))

  Hooks.runAction('action:api.video.uploaded', { video: videoCreated, req, res })

  return {
    video: {
      id: videoCreated.id,
      shortUUID: uuidToShort(videoCreated.uuid),
      uuid: videoCreated.uuid
    }
  }
}

async function addVideoJobsAfterUpload (video: MVideoFullLight, videoFile: MVideoFile) {
  const jobs: (CreateJobArgument & CreateJobOptions)[] = [
    {
      type: 'manage-video-torrent' as 'manage-video-torrent',
      payload: {
        videoId: video.id,
        videoFileId: videoFile.id,
        action: 'create'
      }
    },

    {
      type: 'generate-video-storyboard' as 'generate-video-storyboard',
      payload: {
        videoUUID: video.uuid,
        // No need to federate, we process these jobs sequentially
        federate: false
      }
    },

    {
      type: 'notify',
      payload: {
        action: 'new-video',
        videoUUID: video.uuid
      }
    },

    {
      type: 'federate-video' as 'federate-video',
      payload: {
        videoUUID: video.uuid,
        isNewVideoForFederation: true
      }
    }
  ]

  if (video.state === VideoState.TO_MOVE_TO_EXTERNAL_STORAGE) {
    jobs.push(await buildMoveJob({ video, previousVideoState: undefined, type: 'move-to-object-storage' }))
  }

  if (video.state === VideoState.TO_TRANSCODE) {
    jobs.push({
      type: 'transcoding-job-builder' as 'transcoding-job-builder',
      payload: {
        videoUUID: video.uuid,
        optimizeJob: {
          isNewVideo: true
        }
      }
    })
  }

  return JobQueue.Instance.createSequentialJobFlow(...jobs)
}

async function deleteUploadResumableCache (req: express.Request, res: express.Response, next: express.NextFunction) {
  await Redis.Instance.deleteUploadSession(req.query.upload_id)

  return next()
}

async function createThumbnailFiles (options: {
  video: MVideoThumbnail
  files: UploadFiles
  videoFile: MVideoFile
  ffprobe?: FfprobeData
}) {
  const { video, videoFile, files, ffprobe } = options

  const models = await buildVideoThumbnailsFromReq({
    video,
    files,
    fallback: () => Promise.resolve(undefined)
  })

  const filteredModels = models.filter(m => !!m)

  const thumbnailsToGenerate = [ ThumbnailType.MINIATURE, ThumbnailType.PREVIEW ].filter(type => {
    // Generate missing thumbnail types
    return !filteredModels.some(m => m.type === type)
  })

  return [ ...filteredModels, ...await generateLocalVideoMiniature({ video, videoFile, types: thumbnailsToGenerate, ffprobe }) ]
}