self.addEventListener("push", (event) => {
  const payload = (() => {
    if (!event.data) {
      return {};
    }

    try {
      return event.data.json();
    } catch {
      return {
        body: event.data.text(),
      };
    }
  })();

  const notifyClients = self.clients
    .matchAll({ type: "window", includeUncontrolled: true })
    .then((clients) =>
      Promise.all(
        clients.map((client) =>
          client.postMessage({
            type: "termi:web-push-received",
            payload,
          }),
        ),
      ),
    );

  const title = payload.title || "订阅更新";
  const url = payload.url || "/";
  const options = {
    body: payload.body || "",
    icon: payload.icon || "/favicon.svg",
    badge: payload.badge || "/favicon.ico",
    tag: payload.tag || "termi-subscription",
    data: {
      url,
      ...(payload.data || {}),
    },
  };

  event.waitUntil(
    Promise.all([
      self.registration.showNotification(title, options),
      notifyClients,
    ]),
  );
});

self.addEventListener("notificationclick", (event) => {
  event.notification.close();
  const targetUrl = event.notification?.data?.url || "/";

  event.waitUntil(
    self.clients
      .matchAll({ type: "window", includeUncontrolled: true })
      .then((clients) => {
        for (const client of clients) {
          if ("focus" in client && client.url === targetUrl) {
            return client.focus();
          }
        }

        if (self.clients.openWindow) {
          return self.clients.openWindow(targetUrl);
        }

        return undefined;
      }),
  );
});