defmodule ActivityPub.Webfinger do
  def lookup_resource(acct_handle) do
    [_handle, domain] = String.split(acct_handle, "@")

    uri = %URI{
      scheme: "https",
      authority: domain,
      host: domain,
      port: 443,
      path: "/.well-known/webfinger",
      query: "resource=acct:#{acct_handle}"
    }

    case Req.get(uri) do
      {:ok, response} ->
        {:ok, response.body}

      other ->
        other
    end
  end
end