import { Request, Resolver } from './typings'

export function getInnerRequest(resolver: Resolver, request: Request) {
  if (
    typeof request.__innerRequest === 'string' &&
    request.__innerRequest_request === request.request &&
    request.__innerRequest_relativePath === request.relativePath
  ) {
    return request.__innerRequest
  }

  let innerRequest
  if (request.request) {
    innerRequest = request.request

    // @todo could match it if it had [Symbol]
    if (/^\.\.?\//.test(innerRequest + '') && request.relativePath) {
      innerRequest = resolver.join(request.relativePath, innerRequest)
    }
  } else {
    innerRequest = request.relativePath
  }
  request.__innerRequest_request = request.request
  request.__innerRequest_relativePath = request.relativePath

  return (request.__innerRequest = innerRequest)
}