export async function buildConfig(
  _config: Config,
): Promise<SanitizedConfig> {
  // Create a wrapper function that maintains a single instance in dev
  let cachedConfig: SanitizedConfig | null = null
  let cachedConfigFn: (() => Promise<SanitizedConfig>) | null = null

  const getConfigFn = () => async (): Promise<SanitizedConfig> => {
    // In development, cache the sanitized config
    if (process.env.NODE_ENV === 'development') {
      if (!cachedConfig) {
        cachedConfig = await loadAndSanitizeConfig(() => _config)
      }
      return cachedConfig
    }
    // In production, just process normally since it's already optimized
    return await loadAndSanitizeConfig(() => _config)
  }

  // In development, return a function that returns the cached result
  if (process.env.NODE_ENV === 'development') {
    if (!cachedConfigFn) {
      cachedConfigFn = getConfigFn()
    }
    return await cachedConfigFn()
  }

  // In production, just process normally
  return await loadAndSanitizeConfig(() => _config)
}