number-name/src/systems/en/getShortKiloName.ts

import { GetKiloName, Digit } from '../../common'
import NAMES from './names'
import getKiloCombiningPrefix from './base/kilo/combiningPrefix'

const getKiloName: GetKiloName = (thousandPower) => {
  if (thousandPower === 0n) {
    return ''
  }
  if (thousandPower === 1n) {
    return NAMES.thousand
  }
  const kilo = thousandPower - 1n
  const kiloHundreds = kilo / 100n
  const kiloTens = (Number(kilo / 10n) % 10) as Digit
  const kiloOnes = (Number(kilo) % 10) as Digit

  return getKiloCombiningPrefix(kiloHundreds, kiloTens, kiloOnes) + NAMES.kiloEvenSuffix
}

export default getKiloName