interface Affiliations { [jid: string]: 'outcast' | 'none' | 'member' | 'admin' | 'owner' }

async function getVideoAffiliations (options: RegisterServerOptions, video: MVideoThumbnail): Promise<Affiliations> {
  const peertubeHelpers = options.peertubeHelpers
  // Get all admins and moderators
  const [results] = await peertubeHelpers.database.query(
    'SELECT "username" FROM "user"' +
    ' WHERE "user"."role" IN (0, 1)'
  )
  if (!Array.isArray(results)) {
    throw new Error('getVideoAffiliations: query result is not an array.')
  }
  const r: Affiliations = {}
  for (let i = 0; i < results.length; i++) {
    const result = results[i]
    if (typeof result !== 'object') {
      throw new Error('getVideoAffiliations: query result is not an object')
    }
    if (!('username' in result)) {
      throw new Error('getVideoAffiliations: no username field in result')
    }
    const jid = (result.username as string) + '@localhost'
    r[jid] = 'owner'
  }

  // Adding an 'admin' affiliation for video owner
  // NB: if it fails, we want previous results to be returned...
  try {
    const userName = await _getVideoOwnerUsername(options, video)
    const userJid = userName + '@localhost'
    r[userJid] = 'admin'
  } catch (error) {
    peertubeHelpers.logger.error('Failed to get video owner informations:', error)
  }

  return r
}

async function _getVideoOwnerUsername (options: RegisterServerOptions, video: MVideoThumbnail): Promise<string> {
  // checking type of video.channelId
  if (!video.channelId) {
    throw new Error('Missing channelId on video')
  }
  if (!Number.isInteger(video.channelId)) {
    throw new Error('Invalid channelId: not an integer')
  }
  const [results] = await options.peertubeHelpers.database.query(
    'SELECT "user"."username"' +
    ' FROM "videoChannel"' +
    ' JOIN "account" ON "account"."id" = "videoChannel"."accountId"' +
    ' JOIN "user" ON "account"."userId" = "user"."id" ' +
    ' WHERE "videoChannel"."id" = ' + video.channelId.toString()
  )
  if (!Array.isArray(results)) {
    throw new Error('_getVideoOwnerUsername: query result is not an array.')
  }
  if (!results[0]) {
    throw new Error('_getVideoOwnerUsername: no user found')
  }
  if (!results[0].username) {
    throw new Error('_getVideoOwnerUsername: no username in result')
  }
  return results[0].username as string
}

export {
  Affiliations,
  getVideoAffiliations
}