public class NetworkSetup {

    private final APIClient apiClient = new APIClientImpl("APIKEY"); // create an instance of the API Client
    
    public void setup(String networkName, String backend, String domainName) {
        List<Network> networks = apiClient.getNetworks(); // fetches all networks

        int networkID;
        int domainID;

        Optional<Network> foundNetwork = networks.stream().filter(network -> network.getName().equals("TestNetwork")).findAny(); // checks if any networks with the name "TestNetwork" exist

        if (foundNetwork.isPresent()) { // network found
            Network network = foundNetwork.get();
            networkID = network.getID();

            Domain foundDomain = apiClient.getDomains(networkID).stream().filter(domain -> domain.getName().equals(domainName)).findAny().orElseThrow(IllegalStateException::new); // gets the ID of the domain
            domainID = foundDomain.getID();
        } else { // no network found
            networkID = apiClient.addNetwork("TestNetwork").getData().getNetworkID(); // adds the network
            int backendSetID = apiClient.addBackendSet(networkID, networkName + " Set", backend).getData().getID(); // adds the backend set
            domainID = apiClient.addDomain(networkID, domainName, backendSetID, false).getData().getID(); // adds the domain
        }

        if (apiClient.verify(networkID, domainID)) { // verifies the domain; true if successful, false if not
            System.out.println("Successfully created the network.");
        } else {
            Network network = apiClient.getNetwork(networkID); // fetches the network in order to get the TXT verification string

            System.out.println("Create a TXT record on @ with \"" + network.getTXTVerification() + "\" and re-run the program.");
        }
    }
}