Made of little things.

import { config } from '@napplet/sdk';
import { runtimeHasDomain } from './domain-availability.js';
import settingsSchema from '../config.schema.json';

export type HostSettings = { invertPitch?: unknown; muted?: unknown };

/**
 * Optional host-managed preferences (config domain). The upstream Vite plugin
 * embeds config.schema.json into the signed build. In-game toggles still work
 * when the host has no config domain.
 */
export function onHostSettings(apply: (values: HostSettings) => void): void {
  if (!runtimeHasDomain('config')) return;
  void (async () => {
    // Some hosts consume the embedded schema; others need standard registration.
    if (!config.schema) {
      await config.registerSchema(settingsSchema as Parameters<typeof config.registerSchema>[0]);
    }
    const subscription = config.subscribe((values) => apply(values as HostSettings));
    window.addEventListener('pagehide', () => subscription.close(), { once: true });
  })().catch(() => {
    // Optional operations may be unavailable even when a host exposes the domain.
  });
}