import { parseTime } from '@/utils'
import {
  subscribe,
  unsubscribe
} from '@/utils/mqtt'

export default {
  inject: ['dashboard'],
  data () {
    return {
      groupOptions: this.createGroupOptions({ ignore: true })
    }
  },
  created () {
    this.$timer = -1
    this.refreshGroups(true)
  },
  beforeDestroy () {
    this.onResetGroupOptions()
  },
  methods: {
    createGroupOptions (options) {
      return {
        ignore: false,
        loading: false,
        loaded: false,
        list: [],
        ...options
      }
    },
    refreshGroups (force) {
      // todo
      console.log(force)
    },
    onResetGroupOptions () {
      this.groupOptions.ignore = true
      this.groupOptions.list = []
      clearTimeout(this.$timer)
      if (this.groupOptions.topics) {
        unsubscribe(this.groupOptions.topics, this.onMessage)
      }
    },
    createTopics ({ id, productId }) {
      const topic = `${productId}/${id}`
      return [
        `${topic}/online`,
        `${topic}/offline`/* ,
        `${topic}/calendar/update` */
      ]
    },
    onSubscribe (topics) {
      if (topics.length) {
        this.groupOptions.topics = topics
        subscribe(this.groupOptions.topics, this.onMessage)
      }
    },
    onMessage (topic) {
      if (!this.groupOptions.loaded || this.groupOptions.ignore) {
        return
      }
      const result = /^\d+\/(\d+)\/(online|offline|calendar\/update)$/.exec(topic)
      if (!result) {
        return
      }
      const deviceId = result[1]
      const topicKey = result[2]
      const device = this.groupOptions.map?.[deviceId]
      if (device) {
        switch (topicKey) {
          case 'calendar/update':
            device.flag = -Date.now()
            break
          default:
            if (topicKey !== (device.onlineStatus === 1 ? 'online' : 'offline')) {
              if (topicKey === 'online') {
                device.onlineStatus = 1
              } else {
                device.onlineStatus = 2
              }
              device.lastOnline = parseTime(new Date(), '{y}-{m}-{d} {h}:{i}:{s}')
              this.onStatusChanged(topicKey)
            }
            break
        }
      }
    },
    onStatusChanged (topicKey) {
      this.dashboard?.onDeviceStatusChanged(topicKey === 'online' ? 1 : -1)
    },
    transformDevice ({ id, name, productId, onlineStatus, lastOnline, address }) {
      return {
        id, name, productId, onlineStatus, lastOnline, address,
        flag: 0
      }
    }
  }
}