import Big from 'big.js';

export const roundUpWithoutDecimal = (n: number): number => Math.ceil(n);
export const roundDownWithoutDecimal = (n: number): number => Math.floor(n);
export const roundNumberWithDecimal = (n: number, r: number): number =>
  new Big(n).round(r).toNumber();

function getDivisor(num: number): number {
  if (num >= 1000000 || num >= 500000) return 1000;
  if (num >= 100000 || num >= 10000) return 100;
  if (num >= 1000) return 10;
  return 1;
}

export function roundDownNumberSmart(num: number): number {
  const divisor = getDivisor(num);
  return Math.floor(num / divisor) * divisor;
}

export function roundUpNumberSmart(num: number): number {
  if (num <= 1) {
    return num;
  } else if (num <= 50) {
    return Math.ceil(num / 5) * 5;
  } else if (num <= 500) {
    return Math.ceil(num / 50) * 50;
  } else {
    return Math.ceil(num / 100) * 100;
  }
}