/**
 * Resolve a `server` config value into a full base URL for `@tlecommunity/client`.
 *
 * Ported from the old `emissary.getUrl` host logic: a value that already looks
 * like a URL is used as-is (normalised to exactly one trailing slash, which is
 * what the client's own `Config` does); a bare shortname such as `us1` becomes
 * `http://us1.lacunaexpanse.com/` (https in the browser, matching the page).
 *
 * @param {string} server - a full `http(s)://host` URL or a bare server shortname
 * @return {string} the base URL, guaranteed to end in `/`
 */
export function resolveServerUrl(server) {
  if (!server) {
    throw 'No server configured'
  }

  const value = String(server)

  if (value.startsWith('http')) {
    return value.endsWith('/') ? value : `${value}/`
  }

  const protocol = typeof window !== 'undefined' ? window.location.protocol : 'http:'
  return `${protocol}//${value}.lacunaexpanse.com/`
}