import { NullOr } from '../../../../utilities';
import { MoneyValue } from './MoneyValue';
import { Result } from './Result';

export interface IUnitPriceProps {
  amount: NullOr<number | string>;
  currencyCode?: string;
  precision: number;
}

export class UnitPrice extends MoneyValue {
  public static create(props: IUnitPriceProps) {
    const {amount, currencyCode, precision = 4} = props;

    const _unitPriceOrError = MoneyValue.create({
      amount,
      currencyCode,
      precision,
    });
    if (_unitPriceOrError.isFailure) {
      return _unitPriceOrError;
    }

    const _unitPrice = _unitPriceOrError.object.convertPrecision(4);

    return Result.ok<UnitPrice>(_unitPrice);
  }
}