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

import { GetKiloName } from '../../NumberSystem'
import NAMES from './names.json'
import getKiloCombiningPrefix from './base/kilo/combiningPrefix'

const getLongKiloName: GetKiloName = (thousandPower) => {
  if (thousandPower === 0) {
    return ''
  }
  if (thousandPower === 1) {
    return NAMES.thousand
  }
  const kilo = thousandPower
  const kiloHundreds = Math.floor(kilo / 2 / 100)
  const kiloTens = Math.floor((kilo / 2 / 10) % 10)
  const kiloOnes = Math.floor((kilo / 2) % 10)
  const baseKiloName = getKiloCombiningPrefix(kiloHundreds, kiloTens, kiloOnes) + NAMES.kiloEvenSuffix

  return thousandPower % 2 === 0 ? baseKiloName : NAMES.thousand + ' ' + baseKiloName
}

export default getLongKiloName