// SPDX-FileCopyrightText: 2024 John Livingston <https://www.john-livingston.fr/>
//
// SPDX-License-Identifier: AGPL-3.0-only

import type { RegisterServerOptions, Video, MVideoThumbnail } from '@peertube/peertube-types'
import { getVideoLiveChatInfos } from './federation/storage'
import { anonymousConnectionInfos, compatibleRemoteAuthenticatedConnectionEnabled } from './federation/connection-infos'

async function initCustomFields (options: RegisterServerOptions): Promise<void> {
  const registerHook = options.registerHook
  const storageManager = options.storageManager
  const logger = options.peertubeHelpers.logger

  registerHook({
    target: 'action:api.live-video.created',
    handler: async ({ video, req }: { video: Video | undefined, req: any }) => {
      if (!video?.id) { return }
      // When creating a new live, if 'chat-per-live-video' is true,
      // we must read req.body.pluginData['livechat-active'] (as for action:api.video.updated).
      // This is done for the Peertube live Android app, which does not update the video after creation.
      // See: https://github.com/JohnXLivingston/peertube-plugin-livechat/issues/400

      // Note: following code is a little bit verbose, to be sure it can't fail, even with old Peertube versions.
      if (!req || (typeof req !== 'object') || !('body' in req)) { return }
      if (!req.body || (typeof req.body !== 'object') || !('pluginData' in req.body)) { return }
      const pluginData = req.body?.pluginData
      if (!pluginData || (typeof pluginData !== 'object') || !('livechat-active' in pluginData)) { return }
      if (pluginData['livechat-active'] !== true) { return }

      const setting = await options.settingsManager.getSetting('chat-per-live-video')
      if (setting !== true) { return }

      logger.info(
        'New live created, livechat-active parameter given, ' +
        `enabling chat by default by setting livechat-active=true for video ${video.id.toString()}.`
      )
      await storageManager.storeData(`livechat-active-${video.id.toString()}`, true)
    }
  })

  registerHook({
    target: 'action:api.video.updated',
    handler: async (params: any) => {
      logger.debug('Saving a video, checking for custom fields')

      const body: any = params.body
      const video: Video | undefined = params.video
      if (!video?.id) {
        return
      }
      if (!body.pluginData) return
      const value = body.pluginData['livechat-active']
      // NB: on Peertube 3.2.1, value is "true", "false", or "null", as strings.
      if (value === true || value === 'true') {
        logger.info(`Saving livechat-active=true for video ${video.id.toString()}`)
        await storageManager.storeData(`livechat-active-${video.id.toString()}`, true)
      } else if (value === false || value === 'false' || value === 'null') {
        logger.info(`Saving livechat-active=false for video ${video.id.toString()}`)
        await storageManager.storeData(`livechat-active-${video.id.toString()}`, false)
      } else {
        logger.error('Unknown value ' + JSON.stringify(value) + ' for livechat-active field.')
      }
    }
  })

  registerHook({
    target: 'filter:api.video.get.result',
    handler: async (video: Video): Promise<Video> => {
      logger.debug('Getting a video, searching for custom fields and data')
      await fillVideoCustomFields(options, video)
      if (!video.isLocal) {
        await fillVideoRemoteLiveChat(options, video)
      }
      return video
    }
  })
}

// FIXME: @peertube/peertype-types@4.2.2: wrongly thinks that loadByIdOrUUID return a MVideoThumbnail.
//      So we create this custom interface for fillVideoCustomFields to accept Video and MVideoThumbnail types.
interface LiveChatCustomFieldsVideo {
  id?: number | string
  isLive: boolean
  pluginData?: {
    'livechat-active'?: boolean
    'livechat-remote'?: boolean
  }
}

async function fillVideoCustomFields (options: RegisterServerOptions, video: LiveChatCustomFieldsVideo): Promise<void> {
  if (!video) return video
  if (!video.pluginData) video.pluginData = {}
  if (!video.id) return
  const storageManager = options.storageManager
  const logger = options.peertubeHelpers.logger

  if (video.isLive) {
    const result: any = await storageManager.getData(`livechat-active-${video.id as string}`)
    logger.debug(`Video ${video.id as string} has livechat-active=` + JSON.stringify(result))
    // NB: I got weird stuff here. Maybe Peertube 3.2.1 bug?
    if (result === true || result === 'true') {
      video.pluginData['livechat-active'] = true
    } else if (result === false || result === 'false' || result === 'null') {
      video.pluginData['livechat-active'] = false
    }
  }
}

async function fillVideoRemoteLiveChat (
  options: RegisterServerOptions,
  video: Video | MVideoThumbnail
): Promise<void> {
  if (('remote' in video) && !video.remote) { return }
  if (('isLocal' in video) && video.isLocal) { return }
  const infos = await getVideoLiveChatInfos(options, video)
  if (!infos) { return }

  let ok = false
  // We must check if there is a compatible connection protocol...
  if (anonymousConnectionInfos(infos)) {
    // Connection ok using a remote anonymous account. That's enought.
    ok = true
  } else {
    const settings = await options.settingsManager.getSettings([
      'federation-no-remote-chat',
      'prosody-room-allow-s2s',
      'disable-websocket'
    ])
    const canWebsocketS2S = !settings['federation-no-remote-chat'] && !settings['disable-websocket']
    const canDirectS2S = !settings['federation-no-remote-chat'] && !!settings['prosody-room-allow-s2s']
    if (compatibleRemoteAuthenticatedConnectionEnabled(infos, canWebsocketS2S, canDirectS2S)) {
      // Even better, we can do a proper S2S connection!
      ok = true
    }
  }

  if (!ok) {
    return
  }

  const v: LiveChatCustomFieldsVideo = video
  if (!v.pluginData) v.pluginData = {}
  v.pluginData['livechat-remote'] = true
}

export {
  initCustomFields,
  fillVideoCustomFields,
  fillVideoRemoteLiveChat
}