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import { selectHasLocalSession, useAuthStore } from "@/client/stores/auth-store";
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const MANIFEST_HREF = "/manifest.webmanifest";
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function findManifestLink(): HTMLLinkElement | null {
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  return document.head.querySelector<HTMLLinkElement>('link[rel="manifest"]');
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}
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function mountManifestLink(): void {
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  if (findManifestLink()) return;
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  const link = document.createElement("link");
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  link.rel = "manifest";
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  link.href = MANIFEST_HREF;
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  document.head.appendChild(link);
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}
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function removeManifestLink(): void {
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  const existing = findManifestLink();
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  if (existing) existing.remove();
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}
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function apply(hasLocal: boolean): void {
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  if (hasLocal) mountManifestLink();
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  else removeManifestLink();
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}
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/**
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 * Mount `<link rel="manifest">` only while the user has a local session
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 * (AUTHENTICATED / LOCAL_ONLY / EXPIRED). Anonymous `/` visits stay
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 * uninstallable so the browser's install heuristic never triggers before
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 * the user signs in.
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 */
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export function installManifestGate(): () => void {
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  if (typeof document === "undefined") return () => {};
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  apply(selectHasLocalSession(useAuthStore.getState()));
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  return useAuthStore.subscribe((state) => {
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    apply(selectHasLocalSession(state));
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  });
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}