import { ISO8601Date } from '@type/date'

// ISO 8601 date regex allowing optional components (month, day, time)
const ISO8601RegexString = '^\\d{4}(-\\d{2})?(-\\d{2})?(T\\d{2}(:\\d{2})?(:\\d{2})?(\\.\\d{3})?)?([+-]\\d{2}:\\d{2}|Z)?$'

const isISO8601Date = (dateString: string): boolean => {
  const ISO8601Regex = new RegExp(ISO8601RegexString)
  return ISO8601Regex.test(dateString)
}

const sanitizeISO8601Date = (dateString: string): ISO8601Date => {
  if (isISO8601Date(dateString)) {
    return dateString as ISO8601Date
  }
  return new Date(dateString).toISOString() as ISO8601Date
}

export {
  sanitizeISO8601Date,
  isISO8601Date,
}