// Pure display formatters for the client panes (v0.9.0) — no game logic, unit-testable in node.

const CURRENCY = new Intl.NumberFormat('en-US', { style: 'currency', currency: 'EUR' });

export function formatCash(value: number): string {
  return CURRENCY.format(value);
}

// "6300 / 6300 L" — current value rounded (live fuel is fractional mid-flight).
export function formatFuel(fuel: number, maxFuel: number): string {
  return `${Math.round(fuel)} / ${maxFuel} L`;
}

// The sim clock is epoch ms (seeded from real time) — shown as a UTC wall-clock with
// seconds so the display is deterministic regardless of the viewer's timezone.
export function formatSimClock(clockMs: number): string {
  const d = new Date(clockMs);
  const pad = (n: number) => String(n).padStart(2, '0');
  return `${d.getUTCFullYear()}-${pad(d.getUTCMonth() + 1)}-${pad(d.getUTCDate())} ${pad(d.getUTCHours())}:${pad(d.getUTCMinutes())}:${pad(d.getUTCSeconds())} UTC`;
}