/* Prabhupāda Says — Web Push service worker.
 *
 * Handles incoming push messages (shows a notification) and clicks (focuses
 * an existing tab or opens the target URL). The push payload is the JSON the
 * BFF sends: { title, body, url, icon, tag }.
 */

self.addEventListener("install", () => self.skipWaiting());
self.addEventListener("activate", (event) =>
  event.waitUntil(self.clients.claim()),
);

self.addEventListener("push", (event) => {
  let data = {};
  try {
    data = event.data ? event.data.json() : {};
  } catch {
    data = { body: event.data && event.data.text ? event.data.text() : "" };
  }
  const title = data.title || "Prabhupāda Says";
  const options = {
    body: data.body || "",
    icon: data.icon || "/logo_dark.png",
    badge: "/logo_dark.png",
    tag: data.tag || undefined,
    data: { url: data.url || "/" },
  };
  event.waitUntil(self.registration.showNotification(title, options));
});

self.addEventListener("notificationclick", (event) => {
  event.notification.close();
  const url =
    (event.notification.data && event.notification.data.url) || "/";
  event.waitUntil(
    self.clients
      .matchAll({ type: "window", includeUncontrolled: true })
      .then((list) => {
        for (const client of list) {
          if ("focus" in client) {
            if ("navigate" in client) client.navigate(url);
            return client.focus();
          }
        }
        if (self.clients.openWindow) return self.clients.openWindow(url);
      }),
  );
});