self.addEventListener("install", (event) => {
  event.waitUntil(self.skipWaiting());
});

self.addEventListener("activate", (event) => {
  event.waitUntil(self.clients.claim());
});

self.addEventListener("notificationclick", (event) => {
  event.notification.close();
  const data = event.notification.data || {};
  const targetPath = typeof data.url === "string" ? data.url : "/";
  const targetUrl = new URL(targetPath, self.location.origin).toString();

  event.waitUntil(
    self.clients.matchAll({ type: "window", includeUncontrolled: true }).then(async (clientList) => {
      if (clientList.length > 0) {
        const client = clientList[0];
        if ("navigate" in client) {
          await client.navigate(targetUrl);
        }
        if ("focus" in client) {
          await client.focus();
        }
        return;
      }
      if (self.clients.openWindow) {
        await self.clients.openWindow(targetUrl);
      }
    })
  );
});