import * as _ from "lodash"

export function expandEndpoint(endpointSpec) {
  if (typeof endpointSpec === 'string')
    endpointSpec = { controller: endpointSpec }
  return endpointSpec
}

export function expand(spec) {

  if (!spec.name || typeof spec.name !== 'string')
    throw new Error(`must provide a name as a string`)
  if (!/[a-z](-[a-z0-9]+)*/.test(spec))
    throw new Error(`${spec.name} is an invalid name`)

  _.defaults(spec, {
    port: 8080
  })

  for (const key of Object.keys(spec.endpoints)) {
    spec.endpoints[key] = expandEndpoint(spec.endpoints[key])
  }

  return spec
}