import { useQuery } from "@tanstack/react-query";
import { settingsQuery } from "@/lib/queries";
import type { Authority } from "@/lib/types";

/** The one-line explanation on every control file authority takes away. */
export const READ_ONLY_HINT = "Configuration is managed by a file; edit the file and restart nxdns.";

/**
 * The running server's configuration authority, read from the settings
 * envelope — the only route that carries it. `undefined` until that query
 * resolves. Every page may call this: it is the shared `["settings"]` key, so
 * the shell's own subscription serves them all from cache.
 */
export function useAuthority(): Authority | undefined {
	return useQuery(settingsQuery()).data?.authority;
}

/**
 * True only once the server has said a file owns the configuration. While the
 * mode is unknown nothing is disabled — the 403 is the enforcement, this is
 * the courtesy.
 */
export function useReadOnlyConfig(): boolean {
	return useAuthority()?.mode === "managed_file";
}