const gun = Gun("https://hybrid-osn.herokuapp.com/gun");
const gunId = "hybridOSN-beta003/hashtags";

const app = new Vue({
  el: "#app",
  data: {
    date: new Date().toISOString().slice(0, 10),
    keysByDate: {},
    done: 0,
    total: 0,
    showLoading: false,
    hashtags: []
  },
  computed: {
    hashtagKeys() {
      if (this.date in this.keysByDate) {
        return this.keysByDate[this.date];
      } else {
        return [];
      }
    },
    hashtagRanking() {
      const ranking = _.countBy(this.hashtags, hashtag => hashtag);
      const sortableHelper = [];
      for (let entry in ranking) {
        sortableHelper.push({ hashtags: entry, counts: ranking[entry] });
      }
      const sortedRanking = sortableHelper.sort(
        (a, b) => b["counts"] - a["counts"]
      );
      return sortedRanking;
    }
  },
  async mounted() {
    // load data and group by date
    const data = await gun.get(gunId).then();
    const keys = Object.keys(data).filter(val => /^[0-9]+$/.test(val));
    this.keysByDate = _.groupBy(keys, timestamp =>
      new Date(parseInt(timestamp)).toISOString().slice(0, 10)
    );
    this.loadHashtags();
  },
  methods: {
    async loadHashtags() {
      // show loading
      this.showLoading = true;

      // (re)set vars
      this.total = this.hashtagKeys.length;
      this.hashtags = [];

      // fetch tweets
      for (let i = 0; i < this.total; i++) {
        this.done = i + 1;

        let data = await gun
          .get(gunId)
          .get(this.hashtagKeys[i])
          .then();
        this.hashtags.push(data["hashtags"]);
      }

      // finish loading
      this.showLoading = false;
    }
  }
});