Made of little things.

import { config } from '@napplet/sdk';
import settingsSchema from '../config.schema.json';

export type SettingsValues = Record<string, unknown>;

// The upstream Vite plugin embeds config.schema.json into the signed build.
// Config is optional: callers should only start this when the domain exists,
// and the game keeps its defaults if anything here fails.
export function startSettings(apply: (values: SettingsValues) => void): void {
  void (async () => {
    // Some hosts consume the embedded schema; others need standard registration.
    // Do not replace a schema that the host already supplied.
    if (!config.schema) {
      await config.registerSchema(settingsSchema as Parameters<typeof config.registerSchema>[0]);
    }
    const subscription = config.subscribe((values) => apply(values as SettingsValues));
    window.addEventListener('pagehide', () => subscription.close(), { once: true });
  })().catch(() => {
    // Optional operations may be unavailable even when a host exposes the domain.
  });
}