// caches polyfill because it is not added to native yet!
var CACHE_NAME = `${UINAME}-sw`;
var debug = process.env.NODE_ENV === "development" ? true : false;
var version = `${UIVERSION}-sw`;

var log = require("../libs/log");
var caches = require("../../../thirdparty/serviceworker-caches");

if (debug) {
  log("SW: debug is on");
  log(`SW: CACHE_NAME: ${CACHE_NAME}`);
  //log(`SW: appDomain: ${appDomain}`);
  //log(`SW: lang: ${lang}`);
}

if (typeof CACHE_NAME !== "string") {
  throw new Error("Cache Name cannot be empty");
}

self.addEventListener("fetch", (event) => {
  // skip non-get
  if (event.request.method !== "GET") {
    return;
  }

  //Parse the url
  const requestURL = new URL(event.request.url);

  //Check for our own urls
  /*if (requestURL.origin !== location.origin) {
              log('SW: skip external ' + event.request.url);
              return;
            }*/

  //Skip admin url's
  if (
    requestURL.pathname.indexOf("admin") >= 0 ||
    requestURL.pathname.indexOf("Security") >= 0 ||
    requestURL.pathname.indexOf("/dev") >= 0
  ) {
    log(`SW: skip admin ${event.request.url}`);
    return;
  }

  //Test for images
  /*if (/\.(jpg|jpeg|png|gif|webp)$/.test(requestURL.pathname)) {
              log('SW: skip image ' + event.request.url);
              //For now we skip images but change this later to maybe some caching and/or an offline fallback
              return;
            }*/

  // Clone the request for fetch and cache
  // A request is a stream and can be consumed only once.
  const fetchRequest = event.request.clone(),
    cacheRequest = event.request.clone();

  // Respond with content from fetch or cache
  event.respondWith(
    // Try fetch
    fetch(fetchRequest)
      // when fetch is successful, we update the cache
      .then((response) => {
        // A response is a stream and can be consumed only once.
        // Because we want the browser to consume the response,
        // as well as cache to consume the response, we need to
        // clone it so we have 2 streams
        const responseToCache = response.clone();

        // and update the cache
        caches.open(CACHE_NAME).then((cache) => {
          // Clone the request again to use it
          // as the key for our cache
          const cacheSaveRequest = event.request.clone();
          cache.put(cacheSaveRequest, responseToCache);
        });

        // Return the response stream to be consumed by browser
        return response;
      })

      // when fetch times out or fails
      .catch((err) => {
        log("SW: fetch failed");
        // Return the promise which
        // resolves on a match in cache for the current request
        // or rejects if no matches are found
        return caches.match(cacheRequest);
      })
  );
});

// Now we need to clean up resources in the previous versions
// of Service Worker scripts
self.addEventListener("activate", (event) => {
  log(`SW: activated: ${version}`);
  // Destroy the cache
  event.waitUntil(caches.delete(CACHE_NAME));
});

self.addEventListener("install", (e) => {
  log(`SW: installing version: ${version}`);
});