const { Event, Resource, EventNotification, APUser } = require('../api/models/models')
const { Op } = require('sequelize')
const { DateTime } = require('luxon')
const log = require('../log')
module.exports = {
  // remove past federated events
  async _cleanPastEvents () {
    const now = DateTime.now().toUnixInteger()
    const events = await Event.findAll({ where: {
        start_datetime: { [Op.lt]: now },
        apUserApId: { [Op.ne]: null }
    }, raw: true })

    if (!events.length) { return }

    log.info(`[AP] Remove ${events.length} past federated events and related resources`)
    const eventsId = events.map(e => e.id)

    // remove related resources..
    await Resource.destroy({ where: { eventId: eventsId }})

    // ...and notiifcations
    await EventNotification.destroy({ where: { eventId: eventsId }})

    await Event.destroy({ where: { id: eventsId } }).catch(e => {
      log.debug('[AP] Error while removing past federated events: %s', JSON.stringify(e))
    })
  },

  async _cleanUnusedAPUser () {
    const ap_users = await APUser.findAll({
      limit: 500,
      where: { 
        follower: { [Op.not]: true },
        following: { [Op.not]: true },
        trusted: { [Op.not]: true },
        blocked: { [Op.not]: true },
      },
      include: [
        { model: Event, required: false },
        { model: Resource, required: false }
      ],
      raw: true
    })

    const ap_ids = ap_users.filter(a => a['events.id'] === null && a['resources.id'] === null).map(a => a.ap_id )
    if (ap_ids.length) {
        log.debug('[AP] Remove %d not used federated actors', ap_ids.length)
        await APUser.destroy({ where: { ap_id: ap_ids } })
    }
  }
}