const DEFAULTS = {
  region: 'EU-CENTRAL-1',
  minAge: 18,
} as const

function readMeta(name: string): string | null {
  const meta = document.querySelector<HTMLMetaElement>(`meta[name="${name}"]`)
  return meta?.content?.trim() || null
}

/**
 * Deployment region injected via `<meta name="app:region">` in index.html,
 * so the value can be swapped server-side without rebuilding the bundle.
 */
export function getRegion(): string {
  return readMeta('app:region') ?? DEFAULTS.region
}

/** Minimum registration age injected via `<meta name="app:min-age">` in index.html. */
export function getMinAge(): number {
  const raw = readMeta('app:min-age')
  const parsed = raw ? Number.parseInt(raw, 10) : NaN
  return Number.isInteger(parsed) && parsed > 0 ? parsed : DEFAULTS.minAge
}