package jalview.ws2.client.jpred4;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Collections;
import java.util.List;

import jalview.ws.params.ArgumentI;
import jalview.ws.params.ParamManager;
import jalview.ws2.actions.secstructpred.SecStructPredAction;
import jalview.ws2.api.WebService;
import jalview.ws2.client.api.AbstractWebServiceDiscoverer;
import jalview.ws2.client.ebi.JobDispatcherWSDiscoverer;
import jalview.ws2.params.SimpleParamDatastore;
import uk.ac.dundee.compbio.jpred.JPredClient;

public class JPred4WSDiscoverer extends AbstractWebServiceDiscoverer
{
  private static final URL DEFAULT_URL;
  static
  {
    try
    {
      DEFAULT_URL = new URL("https://www.compbio.dundee.ac.uk/jpred4/");
    } catch (MalformedURLException e)
    {
      throw new ExceptionInInitializerError(e);
    }
  }

  private static JPred4WSDiscoverer instance = null;

  private static ParamManager paramManager = null;

  private JPred4WSDiscoverer()
  {
  }

  public static JPred4WSDiscoverer getInstance()
  {
    if (instance == null)
      instance = new JPred4WSDiscoverer();
    return instance;
  }

  public static void setParamManager(ParamManager manager)
  {
    paramManager = manager;
  }

  @Override
  public int getStatusForUrl(URL url)
  {
    // TODO: implement actual status check
    return STATUS_OK;
  }

  @Override
  public String getUrlsPropertyKey()
  {
    return null;
  }

  @Override
  protected URL getDefaultUrl()
  {
    return DEFAULT_URL;
  }

  @Override
  protected List<WebService<?>> fetchServices(URL url) throws IOException
  {
    JPredClient client = new JPredClient(url);
    var wsBuilder = WebService.<SecStructPredAction> newBuilder();
    wsBuilder.url(url);
    wsBuilder.clientName("jpred4");
    wsBuilder.category("Secondary structure prediction");
    wsBuilder.name("jpred4");
    wsBuilder.description("JPred4 Secondary Structure Prediction.");
    wsBuilder.interactive(false);

    wsBuilder
        .paramDatastore(new SimpleParamDatastore(url, Collections.emptyList(),
            Collections.emptyList(), paramManager));
    wsBuilder.actionClass(SecStructPredAction.class);
    var webService = wsBuilder.build();

    var actionBuilder = SecStructPredAction.newBuilder(
        new JPred4WSClient(client, false));
    actionBuilder.webService(webService);
    actionBuilder.name("JPred4");
    webService.addAction(actionBuilder.build());
    
    var actionBuilderMsa = SecStructPredAction.newBuilder(
        new JPred4WSClient(client, true));
    actionBuilderMsa.webService(webService);
    actionBuilderMsa.name("JPred4 (MSA)");
    webService.addAction(actionBuilderMsa.build());

    return List.of(webService);
  }
}