export type CurrencyCode = "USD" | "EUR" | "GBP" | "AED" | "ETB";

export const CURRENCY_OPTIONS: { code: CurrencyCode; shortLabel: string }[] = [
  { code: "ETB", shortLabel: "ETB" },
  { code: "USD", shortLabel: "USD" },
  { code: "EUR", shortLabel: "EUR" },
  { code: "GBP", shortLabel: "GBP" },
  { code: "AED", shortLabel: "AED" },
];

export const USD_TO: Record<CurrencyCode, number> = {
  ETB: 1,
  USD: 1,
  EUR: 0.93,
  GBP: 0.79,
  AED: 3.67,
};

export function isCurrencyCode(v: string): v is CurrencyCode {
  return v === "USD" || v === "EUR" || v === "GBP" || v === "AED" || v === "ETB";
}

export function convertFromUsd(usd: number, code: CurrencyCode): number {
  const n = usd * USD_TO[code];
  return Math.round(n * 100) / 100;
}

export function formatMoneyFromUsd(
  usd: number,
  code: CurrencyCode,
  maximumFractionDigits: 0 | 1 | 2 = 2,
): string {
  const amount = convertFromUsd(usd, code);
  return new Intl.NumberFormat("en-US", {
    style: "currency",
    currency: code,
    minimumFractionDigits: 0,
    maximumFractionDigits,
  }).format(amount);
}