const isLocalhost = self.location.hostname === "localhost" || self.location.hostname === "127.0.0.1";

if (!isLocalhost) {
  const STATIC_CACHE = "construction-delivery-static-v114";
  const RUNTIME_CACHE = "construction-delivery-runtime-v114";
  const APP_SHELL_URLS = ["/", "/client", "/index.html", "/manifest.webmanifest", "/icons/icon-192.png", "/icons/icon-512.png"];

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

  self.addEventListener("activate", (event) => {
    event.waitUntil(
      caches
        .keys()
        .then((keys) =>
          Promise.all(
            keys
              .filter((key) => ![STATIC_CACHE, RUNTIME_CACHE].includes(key))
              .map((key) => caches.delete(key)),
          ),
        )
        .then(() => self.clients.claim())
        .then(async () => {
          const clients = await self.clients.matchAll({ includeUncontrolled: true });
          clients.forEach((client) => client.postMessage({ type: "PWA_OFFLINE_READY" }));
        }),
    );
  });

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

    const requestUrl = new URL(event.request.url);
    const isSameOrigin = requestUrl.origin === self.location.origin;

    if (event.request.mode === "navigate") {
      event.respondWith(
        fetch(event.request)
          .then((response) => {
            const responseClone = response.clone();
            caches.open(RUNTIME_CACHE).then((cache) => cache.put(event.request, responseClone));
            return response;
          })
          .catch(async () => {
            const cachedPage = await caches.match(event.request);
            return cachedPage || caches.match("/index.html");
          }),
      );
      return;
    }

    if (!isSameOrigin) {
      return;
    }

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

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

          const responseClone = response.clone();
          caches.open(RUNTIME_CACHE).then((cache) => cache.put(event.request, responseClone));
          return response;
        });
      }),
    );
  });
} else {
  self.addEventListener("install", (event) => self.skipWaiting());
  self.addEventListener("activate", (event) => self.clients.claim());
}

// Push notification handler
self.addEventListener("push", (event) => {
  let data = {};
  try {
    data = event.data ? event.data.json() : {};
  } catch {
    data = { title: "Уведомление", body: "" };
  }

  const { title, body, url } = data;
  const targetUrl = (() => {
    if (!url) return "/client";
    try {
      const parsed = new URL(url, self.location.origin);
      if (parsed.origin !== self.location.origin) return "/client";
      const legacyMatch = parsed.pathname.match(/^\/delivery\/([^/]+)$/);
      if (legacyMatch) return `/client/${legacyMatch[1]}${parsed.search}${parsed.hash}`;
      return parsed.pathname.startsWith("/client")
        ? `${parsed.pathname}${parsed.search}${parsed.hash}`
        : "/client";
    } catch {
      return "/client";
    }
  })();

  event.waitUntil(
    self.registration.showNotification(title || "Уведомление", {
      body: body || "",
      icon: "/icons/icon-512.png",
      data: { url: targetUrl },
    }),
  );
});

// Notification click handler
self.addEventListener("notificationclick", (event) => {
  event.notification.close();

  const targetPath = (event.notification.data && event.notification.data.url) || "/client";
  const targetUrl = new URL(targetPath, self.location.origin).href;

  event.waitUntil(
    self.clients.matchAll({ type: "window", includeUncontrolled: true }).then(async (clientList) => {
      const sameOriginClient = clientList.find((client) => {
        try {
          return new URL(client.url).origin === self.location.origin;
        } catch {
          return false;
        }
      });
      if (sameOriginClient) {
        if ("navigate" in sameOriginClient) await sameOriginClient.navigate(targetUrl);
        return "focus" in sameOriginClient ? sameOriginClient.focus() : undefined;
      }
      return self.clients.openWindow(targetUrl);
    }),
  );
});