import localization from "./localization.js";

export class LangManager {
  #lang;
  #units = {
    year: 24 * 60 * 60 * 1000 * 365,
    month: (24 * 60 * 60 * 1000 * 365) / 12,
    week: 7 * 24 * 60 * 60 * 1000,
    day: 24 * 60 * 60 * 1000,
    hour: 60 * 60 * 1000,
    minute: 60 * 1000,
    second: 1000,
  };

  constructor(lang) {
    this.#lang = lang;
  }

  get currentLocalization() {
    return localization.get(this.#lang);
  }

  get langCode() {
    return this.#lang;
  }

  getTimeDuration(d1, d2) {
    let elapsed = d2 - d1;

    for (var u in this.#units)
      if (Math.abs(elapsed) > this.#units[u] || u == "second") {
        let currentUnit = this.currentLocalization.time_units[u];
        return currentUnit(Math.round(elapsed / this.#units[u]));
      }
  }

  formatList(items) {
    const formatter = new Intl.ListFormat("en", {
      style: "long",
      type: "conjunction",
    });

    return formatter.format(items);
  }
}