import Vuex from 'vuex'
import md5 from 'md5'
import slugify from 'slugify'
import db from '~/plugins/firestore'
import { saveUserData, clearUserData } from '~/utils'

const createStore = () => {
  return new Vuex.Store({
    state: {
      headlines: [],
      feed: [],
      loading: false,
      category: '',
      token: null,
      country: 'us',
      user: null
    },
    mutations: {
      setHeadLines (state, headlines) {
        state.headlines = headlines
      },
      setLoading (state, loading) {
        state.loading = loading
      },
      setCategory (state, category) {
        state.category = category
      },
      setCountry (state, country) {
        state.country = country
      },
      setToken (state, token) {
        state.token = token
      },
      setUser (state, user) {
        state.user = user
      },
      setFeed (state, headlines) {
        state.feed = headlines
      },
      clearToken: state => (state.token = null),
      clearUser: state => (state.user = null),
      clearFeed: state => (state.feed = [])
    },
    actions: {
      async loadHeadLines ({ commit }, apiUrl) {
        commit('setLoading', true)
        const { articles } = await this.$axios.$get(apiUrl)
        const headlines = articles.map((article) => {
          const slug = slugify(article.title, {
            replacement: '-',
            remove: /[^a-zA-Z0-9 -]/g
          })
          const headline = { ...article, slug }
          return headline
        })
        commit('setLoading', false)
        commit('setHeadLines', headlines)
      },
      async authenticateUser ({ commit }, userPayload) {
        try {
          commit('setLoading', true)
          const autuUserData = await this.$axios.$post(
            `/${userPayload.action}/`,
            {
              email: userPayload.email,
              password: userPayload.password,
              resturnSecureToken: userPayload.resturnSecureToken
            }
          )
          let user
          if (userPayload.action === 'register') {
            const avatar = `http://gravatar.com/avatar/${md5(autuUserData.email)}?d=identicon`
            user = { email: autuUserData.email, avatar }
            await db
              .collection('users')
              .doc(userPayload.email)
              .set(user)
          } else {
            const loginRef = db.collection('users').doc(userPayload.email)
            const loggedInUser = await loginRef.get()
            user = loggedInUser.data()
          }
          // console.log(autuUserData)
          commit('setUser', user)
          commit('setToken', autuUserData.idToken)
          commit('setLoading', false)
          saveUserData(autuUserData, user)
        } catch (error) {
          // console.log(error)
        }
      },
      async removeHeadlineFromFeed ({ state }, headline) {
        const headlineRef = db.collection(`users/${state.user.email}/feed`).doc(headline.title)
        await headlineRef.delete()
      },
      async addHeadlineToFeed ({ state }, headline) {
        const feedRef = db.collection(`users/${state.user.email}/feed`).doc(headline.title)
        await feedRef.set(headline)
      },
      async loadUserFeed ({ state, commit }) {
        if (state.user) {
          const feedRef = db.collection(`users/${state.user.email}/feed`)

          await feedRef.onSnapshot((querySnapshot) => {
            // eslint-disable-next-line prefer-const
            let headlines = []
            querySnapshot.forEach((doc) => {
              headlines.push(doc.data())
              commit('setFeed', headlines)
            })

            if (querySnapshot.empty) {
              headlines = []
              commit('setFeed', headlines)
            }
          })
        }
      },
      setLogoutTimer ({ dispatch }, interval) {
        setTimeout(() => dispatch('logoutUser'), interval)
      },
      logoutUser ({ commit }) {
        commit('clearToken')
        commit('clearUser')
        commit('clearFeed')
        clearUserData()
      }
    },
    getters: {
      headlines: state => state.headlines,
      feed: state => state.feed,
      loading: state => state.loading,
      category: state => state.category,
      country: state => state.country,
      isAuthenticated: state => !!state.token,
      user: state => state.user
    }
  })
}

export default createStore