import { isNaN } from 'lodash';
import NUM from './NUM';
import RandomNumber from '../util/random-number';

/**
 * Returns a random integer between the high and low values specified.
 *
 * View Documentation - https://learn.fulcrumapp.com/dev/expressions/reference/randbetween/
 * @param low (Number, required): lowest value of desired range
 * @param high (Number, required): highest value of desired range
 * @returns random integer within specified range
 */

export default function RANDBETWEEN(low: number, high: number): number {
  low = NUM(low);
  high = NUM(high);

  if (isNaN(low) || isNaN(high)) {
    return NaN;
  }

  return low + Math.ceil((high - low + 1) * RandomNumber(1)) - 1;
}