/* eslint-disable no-undef */

const CACHE_NAME = "bulwark-v1";
const STATIC_ASSETS = ["/", "/manifest.json"];

self.addEventListener("install", (event) => {
  event.waitUntil(
    caches.open(CACHE_NAME).then((cache) => {
      return cache.addAll(STATIC_ASSETS);
    })
  );
  self.skipWaiting();
});

self.addEventListener("activate", (event) => {
  event.waitUntil(
    caches.keys().then((cacheNames) => {
      return Promise.all(
        cacheNames
          .filter((cacheName) => cacheName !== CACHE_NAME)
          .map((cacheName) => caches.delete(cacheName))
      );
    })
  );
  self.clients.claim();
});

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

  // Skip API requests and external requests
  if (
    event.request.url.includes("/api/") ||
    !event.request.url.startsWith(self.location.origin)
  ) {
    return;
  }

  event.respondWith(
    caches.match(event.request).then((response) => {
      if (response) {
        return response;
      }

      return fetch(event.request).then((response) => {
        if (!response || response.status !== 200 || response.type === "error") {
          return response;
        }

        const responseToCache = response.clone();
        caches.open(CACHE_NAME).then((cache) => {
          cache.put(event.request, responseToCache);
        });

        return response;
      });
    })
  );
});