1import { NumException } from "../../errors/NumException";
 2import { SheetColumnRowKey } from "../../models/common/SheetColumnRowKey";
 3import { Complex } from "../../models/common/Types";
 4import { Converters } from "../../utils/Converters";
 5import { AbstractFormula } from "../AbstractFormula";
 6import { FormulaName } from "../FormulaName";
 7
 8export class RANDBETWEEN extends AbstractFormula {
 9  static SELF: RANDBETWEEN = new RANDBETWEEN();
10  NAME = FormulaName.RANDBETWEEN;
11
12  internal(origin: SheetColumnRowKey, ...values: Array<Complex>) {
13    AbstractFormula.checkLength(values.length, 2, this.NAME);
14    const low = Converters.toNumber(Converters.first(this.collateralLookup(origin, values[0])));
15    const high = Converters.toNumber(Converters.first(this.collateralLookup(origin, values[1])));
16    const lowRounded = Math.ceil(low);
17    const highRounded = Math.ceil(high);
18    if (lowRounded > highRounded) {
19      return new NumException(
20        `Formula RANDBETWEEN parameter 2 value is ${low}, but it should be greater than or equal to ${high}.`
21      );
22    }
23    const diff = Math.abs(lowRounded - highRounded);
24    return Math.round(lowRounded + Math.random() * diff);
25  }
26}