export function formatCardNumber(raw: string): string {
  const digits = raw.replace(/\D/g, '')
  return digits.replace(/(\d{4})(?=\d)/g, '$1 ').trim()
}

export function formatSheba(raw: string): string {
  const compact = raw.replace(/[\s-]/g, '').toUpperCase()
  const body = compact.startsWith('IR') ? compact.slice(2) : compact
  if (body.length < 2) return compact
  const groups = body.slice(2).replace(/(.{4})/g, '$1 ').trim()
  return `IR${body.slice(0, 2)} ${groups}`.trim()
}