import * as express from 'express'
import { buildNSFWFilter } from '../../helpers/express-utils'
import { getFormattedObjects } from '../../helpers/utils'
import { VideoModel } from '../../models/video/video'
import {
  asyncMiddleware,
  commonVideosFiltersValidator,
  optionalAuthenticate,
  paginationValidator,
  searchValidator,
  setDefaultPagination,
  setDefaultSearchSort,
  videosSearchSortValidator
} from '../../middlewares'
import { VideosSearchQuery } from '../../../shared/models/search'
import { getOrCreateVideoAndAccountAndChannel } from '../../lib/activitypub'
import { logger } from '../../helpers/logger'
import { User } from '../../../shared/models/users'
import { CONFIG } from '../../initializers/constants'

const searchRouter = express.Router()

searchRouter.get('/videos',
  paginationValidator,
  setDefaultPagination,
  videosSearchSortValidator,
  setDefaultSearchSort,
  optionalAuthenticate,
  commonVideosFiltersValidator,
  searchValidator,
  asyncMiddleware(searchVideos)
)

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

export { searchRouter }

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

function searchVideos (req: express.Request, res: express.Response) {
  const query: VideosSearchQuery = req.query
  const search = query.search
  if (search && (search.startsWith('http://') || search.startsWith('https://'))) {
    return searchVideoUrl(search, res)
  }

  return searchVideosDB(query, res)
}

async function searchVideosDB (query: VideosSearchQuery, res: express.Response) {
  const options = Object.assign(query, {
    includeLocalVideos: true,
    nsfw: buildNSFWFilter(res, query.nsfw)
  })
  const resultList = await VideoModel.searchAndPopulateAccountAndServer(options)

  return res.json(getFormattedObjects(resultList.data, resultList.total))
}

async function searchVideoUrl (url: string, res: express.Response) {
  let video: VideoModel
  const user: User = res.locals.oauth ? res.locals.oauth.token.User : undefined

  // Check if we can fetch a remote video with the URL
  if (
    CONFIG.SEARCH.REMOTE_URI.ANONYMOUS === true ||
    (CONFIG.SEARCH.REMOTE_URI.USERS === true && user !== undefined)
  ) {
    try {
      const syncParam = {
        likes: false,
        dislikes: false,
        shares: false,
        comments: false,
        thumbnail: true,
        refreshVideo: false
      }

      const res = await getOrCreateVideoAndAccountAndChannel(url, syncParam)
      video = res ? res.video : undefined
    } catch (err) {
      logger.info('Cannot search remote video %s.', url)
    }
  } else {
    video = await VideoModel.loadByUrlAndPopulateAccount(url)
  }

  return res.json({
    total: video ? 1 : 0,
    data: video ? [ video.toFormattedJSON() ] : []
  })
}