/* coi-serviceworker.js */

if (typeof window === "undefined") {
    // Código del Worker: Intercepta peticiones
    self.addEventListener("install", () => self.skipWaiting());

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

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

        event.respondWith(
            fetch(event.request)
                .then((response) => {
                    if (response.status === 0) return response;

                    const newHeaders = new Headers(response.headers);
                    newHeaders.set("Cross-Origin-Embedder-Policy", "require-corp");
                    newHeaders.set("Cross-Origin-Opener-Policy", "same-origin");
                    newHeaders.set("Cross-Origin-Resource-Policy", "cross-origin");

                    return new Response(response.body, {
                        status: response.status,
                        statusText: response.statusText,
                        headers: newHeaders,
                    });
                })
                .catch(() => fetch(event.request))
        );
    });
} else {
    // Código de la Ventana: Registra el worker y recarga
    (function () {
        if ("serviceWorker" in navigator) {
            navigator.serviceWorker
                .register(window.document.currentScript.src)
                .then((registration) => {
                    registration.addEventListener("updatefound", () => {
                        // Si hay una actualización, recargamos
                        location.reload();
                    });

                    if (registration.active && !navigator.serviceWorker.controller) {
                        // Si el worker está activo pero no controla la página aún, recargamos
                        location.reload();
                    }
                });
        }

        // Si ya estamos aislados, perfecto
        if (window.crossOriginIsolated) {
            console.log("Aislamiento de origen ACTIVADO");
        }
    })();
}