/* global parent, Event, sessionStorage */

import { format } from "timeago.js";
import fuzzy from "fuzzy.js";

let config = {
  cacheKey: "jae_fetch_userjs_cache",
  countKey: "jae_fetch_userjs_count",
  host: window.location.hostname.split(".").splice(-2).join("."),
  api: "https://greasyfork.org/scripts/by-site/{host}.json",
  sapi: "https://sleazyfork.org/scripts/by-site/{host}.json"
};

export default {
  timeagoFormat(time) {
    let lang = navigator.language !== "zh-CN" ? "en_short" : "zh_CN";
    return format(time, lang);
  },
  installUserJs(uri) {
    let evt = new MouseEvent("click"),
    link = parent.document.createElement("a");
    link.href = uri;
    link.dispatchEvent(evt);
  },
  open(url) {
    parent.document.open(url,'', 'noopener=true');
  },
  dispatchEvent(eventName) {
    parent.document.getElementById("jae_userscript_box").dispatchEvent(new Event(eventName));
  },
  /* Nano Templates - https://github.com/trix/nano */
  nano(template, data) {
    return template.replace(/\{([\w.]*)\}/g, (str, key) => {
      let keys = key.split("."),
      v = data[keys.shift()];
      for (let i = 0, l = keys.length; i < l; i++) v = v[keys[i]];
      return typeof v === "undefined" ? "" : v;
    });
  },
  getJSON(url, callback) {
    try {
      parent.window.GmAjax({
        method: "GET",
        url: url,
        onload: res => {
          let json = JSON.parse(res.responseText);
          callback(json);
        }
      })
    } catch (error) {
      console.error(error);
    }
  },
  getData(callback) {
    let data = sessionStorage.getItem(config.cacheKey)
    data ? ((data = JSON.parse(data)), callback(data)) : (
      this.getJSON(this.nano(config.api, { host: config.host }), json => {
        json = json.map(item => {
          item.user = item.users[0];
          return item;
        });
        sessionStorage.setItem(config.cacheKey, JSON.stringify(json));
        callback(json);
      }),
      this.getJSON(this.nano(config.sapi, { host: config.host }), json => {
        json = json.map(item => {
          item.user = item.users[0];
          return item;
        });
        sessionStorage.setItem(config.cacheKey, JSON.stringify(json));
        callback(json);
      })
    );
  },
  getCount() {
    let max = 50,
    count = sessionStorage.getItem(config.countKey);
    return count >= max ? max : count;
  },

  searcher(data, query) {
    let rt = [];
    for (let i = 0; i < data.length; i++) {
      let max,frt,item = data[i];
      for (let key of ["name", "description", "user"]) {
        key === "user" ? (frt = fuzzy(item["user"]["name"], query)) : (frt = fuzzy(item[key], query));
        max ?? (max = frt);
        max.score < frt.score ? (max = frt) : false;
      }
      rt.push({
        item,
        score: max.score
      });
    }
    rt = rt.filter(a => a.score !== 0).sort((a, b) => b.score - a.score).map(a => a.item);
    return rt;
  },

  isZH() {
    let nlang = navigator.language.toLowerCase();
    nlang === "zh" ? (nlang = "zh-cn") : false;
    return nlang.search("zh-") === 0;
  }
};