import { Button, message, notification } from "antd";
import { useIntl } from "umi";
import defaultSettings from "../config/defaultSettings";
const { pwa } = defaultSettings;
const isHttps = document.location.protocol === "https:";

const clearCache = () => {
  // remove all caches
  if (window.caches) {
    caches
      .keys()
      .then((keys) => {
        keys.forEach((key) => {
          caches.delete(key);
        });
      })
      .catch((e) => console.log(e));
  }
}; // if pwa is true

if (pwa) {
  // Notify user if offline now
  window.addEventListener("sw.offline", () => {
    message.warning(
      useIntl().formatMessage({
        id: "app.pwa.offline",
      })
    );
  }); // Pop up a prompt on the page asking the user if they want to use the latest version

  window.addEventListener("sw.updated", (event) => {
    const e = event;

    const reloadSW = async () => {
      // Check if there is sw whose state is waiting in ServiceWorkerRegistration
      // https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerRegistration
      const worker = e.detail && e.detail.waiting;

      if (!worker) {
        return true;
      } // Send skip-waiting event to waiting SW with MessageChannel

      await new Promise((resolve, reject) => {
        const channel = new MessageChannel();

        channel.port1.onmessage = (msgEvent) => {
          if (msgEvent.data.error) {
            reject(msgEvent.data.error);
          } else {
            resolve(msgEvent.data);
          }
        };

        worker.postMessage(
          {
            type: "skip-waiting",
          },
          [channel.port2]
        );
      });
      clearCache();
      window.location.reload();
      return true;
    };

    const key = `open${Date.now()}`;
    const btn = (
      <Button
        type="primary"
        onClick={() => {
          notification.close(key);
          reloadSW();
        }}
      >
        {useIntl().formatMessage({
          id: "app.pwa.serviceworker.updated.ok",
        })}
      </Button>
    );
    notification.open({
      message: useIntl().formatMessage({
        id: "app.pwa.serviceworker.updated",
      }),
      description: useIntl().formatMessage({
        id: "app.pwa.serviceworker.updated.hint",
      }),
      btn,
      key,
      onClose: async () => null,
    });
  });
} else if ("serviceWorker" in navigator && isHttps) {
  // unregister service worker
  const { serviceWorker } = navigator;

  if (serviceWorker.getRegistrations) {
    serviceWorker.getRegistrations().then((sws) => {
      sws.forEach((sw) => {
        sw.unregister();
      });
    });
  }

  serviceWorker.getRegistration().then((sw) => {
    if (sw) sw.unregister();
  });
  clearCache();
}
