import type { Money } from '../../common/money.types';

import { Decimal, formatDecimal } from '../../common/decimal';

const MISSING_PROTO_COMPONENT = 0;

const NANO = 1_000_000_000n;

export type ProtoDecimal = { nano?: number | string; units?: number | string };

export function rubMoney(value?: ProtoDecimal & { currency?: string }): Money | null {
  return value?.currency?.trim().toUpperCase() === 'RUB'
    ? { currency: 'RUB', value: formatDecimal(decimal(value)) }
    : null;
}

export function decimal(value: ProtoDecimal): Decimal {
  return {
    value: BigInt(value.units ?? MISSING_PROTO_COMPONENT) * NANO + BigInt(value.nano ?? MISSING_PROTO_COMPONENT),
    scale: 9,
  };
}