import * as http from '../../HTTP'
import { type Scheme } from './types'

export function split (authorization: string): [Scheme, string] {
  const space = authorization.indexOf(' ')

  if (space === -1)
    throw new http.Unauthorized('Malformed authorization header.')

  const Scheme = authorization.slice(0, space)
  const scheme = Scheme.toLowerCase() as Scheme
  const value = authorization.slice(space + 1)

  return [scheme, value]
}