import React from "react";
import ReactDOM from "react-dom";

import { Workbox } from "workbox-window";
import SnackBar from "@appserver/components/snackbar";
import i18n from "i18next";
import { useTranslation, initReactI18next } from "react-i18next";
import Backend from "i18next-http-backend";
import { LANGUAGE } from "../constants";
import { loadLanguagePath } from "./";

i18n
  .use(Backend)
  .use(initReactI18next)
  .init({
    lng: localStorage.getItem(LANGUAGE) || "en",
    fallbackLng: "en",
    load: "currentOnly",
    //debug: true,

    interpolation: {
      escapeValue: false, // not needed for react as it escapes by default
      format: function (value, format) {
        if (format === "lowercase") return value.toLowerCase();
        return value;
      },
    },

    backend: {
      loadPath: loadLanguagePath(""),
    },

    react: {
      useSuspense: false,
    },
  });

const SnackBarWrapper = (props) => {
  const { t, ready } = useTranslation("Common", { i18n });

  if (ready) {
    const barConfig = {
      parentElementId: "snackbar",
      text: t("NewVersionAvailable"),
      btnText: t("Load"),
      onAction: () => props.onButtonClick(),
      opacity: 1,
      countDownTime: 5 * 60 * 1000,
    };

    return <SnackBar {...barConfig} />;
  }
  return <></>;
};

const registerSW = () => {
  return; //TODO: Enable service-worker after fix of infinite reloading (Bug 53063)

  /*
  if (process.env.NODE_ENV === "production" && "serviceWorker" in navigator) {
    const wb = new Workbox(`/sw.js`);

    const showSkipWaitingPrompt = (event) => {
      console.log(
        `A new service worker has installed, but it can't activate` +
          `until all tabs running the current version have fully unloaded.`
      );

      function refresh() {
        wb.addEventListener("controlling", () => {
          localStorage.removeItem("sw_need_activation");
          window.location.reload();
        });

        // This will postMessage() to the waiting service worker.
        wb.messageSkipWaiting();
      }

      try {
        const snackbarNode = document.createElement("div");
        snackbarNode.id = "snackbar";
        document.body.appendChild(snackbarNode);

        ReactDOM.render(
          <SnackBarWrapper
            onButtonClick={() => {
              snackbarNode.remove();
              refresh();
            }}
          />,
          document.getElementById("snackbar")
        );

        localStorage.setItem("sw_need_activation", true);
      } catch (e) {
        console.error("showSkipWaitingPrompt", e);
        refresh();
      }
    };

    window.addEventListener("beforeunload", async () => {
      if (localStorage.getItem("sw_need_activation")) {
        localStorage.removeItem("sw_need_activation");
        wb.messageSkipWaiting();
      }
    });

    // Add an event listener to detect when the registered
    // service worker has installed but is waiting to activate.
    wb.addEventListener("waiting", showSkipWaitingPrompt);

    wb.register()
      .then((reg) => {
        console.log("Successful service worker registration", reg);

        if (!window.swUpdateTimer) {
          console.log("SW timer checks for updates every hour");
          window.swUpdateTimer = setInterval(() => {
            console.log("SW update timer check");
            reg.update().catch((e) => {
              console.error("SW update timer FAILED", e);
            });
          }, 60 * 60 * 1000);
        }
      })
      .catch((err) => console.error("Service worker registration failed", err));
  } else {
    console.log("SKIP registerSW because of DEV mode");
  }

  */
};

window.SW = {
  registerSW: registerSW,
};

export { registerSW };