nofx/web/src/lib/config.ts

export interface SystemConfig {
  admin_mode: boolean;
}

let configPromise: Promise<SystemConfig> | null = null;
let cachedConfig: SystemConfig | null = null;

export function getSystemConfig(): Promise<SystemConfig> {
  if (cachedConfig) {
    return Promise.resolve(cachedConfig);
  }
  if (configPromise) {
    return configPromise;
  }
  configPromise = fetch('/api/config')
    .then((res) => res.json())
    .then((data: SystemConfig) => {
      cachedConfig = data;
      return data;
    })
    .finally(() => {
      // Keep cachedConfig for reuse; allow re-fetch via explicit invalidation if added later
    });
  return configPromise;
}