/** Shared formatting helpers for the fleet-management pages. */

/** Format a number as Ethiopian Birr, e.g. 12345.6 → "ETB 12,346". */
export function formatETB(amount: number, fractionDigits = 0): string {
  const value = Number.isFinite(amount) ? amount : 0;
  return `ETB ${value.toLocaleString("en-US", {
    minimumFractionDigits: fractionDigits,
    maximumFractionDigits: fractionDigits,
  })}`;
}

/** Safe percentage of `part` over `total`, rounded, 0 when total is 0. */
export function pct(part: number, total: number): number {
  if (!total || !Number.isFinite(total) || !Number.isFinite(part)) return 0;
  return Math.round((part / total) * 100);
}