package jalview.ws.dbsources.das.datamodel;

import java.text.ParseException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.biodas.jdas.dassources.Capabilities;
import org.biodas.jdas.dassources.utils.DasTimeFormat;
import org.biodas.jdas.dassources.utils.RegistrySourceAdapter;
import org.biodas.jdas.schema.sources.CAPABILITY;
import org.biodas.jdas.schema.sources.COORDINATES;
import org.biodas.jdas.schema.sources.MAINTAINER;
import org.biodas.jdas.schema.sources.PROP;
import org.biodas.jdas.schema.sources.SOURCE;
import org.biodas.jdas.schema.sources.VERSION;

import jalview.ws.dbsources.das.api.jalviewSourceI;
import jalview.ws.seqfetcher.DbSourceProxy;

public class JalviewSource implements jalviewSourceI
{
  SOURCE source;

  public JalviewSource(SOURCE local2, boolean local)
  {
    this.local = local;
    source = local2;
  }

  @Override
  public String getTitle()
  {
    return source.getTitle();
  }

  @Override
  public VERSION getVersion()
  {
    
    return getVersionFor(source);
  }

  @Override
  public String getDocHref()
  {
    return source.getDocHref();
  }

  @Override
  public String getDescription()
  {
    return source.getDescription();
  }

  @Override
  public String getUri()
  {
    return source.getUri();
  }

  @Override
  public MAINTAINER getMAINTAINER()
  {
    return source.getMAINTAINER();
  }

  @Override
  public String getEmail()
  {
    return (local) ? null: source.getMAINTAINER().getEmail();
  }

  boolean local = false;

  @Override
  public boolean isLocal()
  {
    return local;
  }

  @Override
  public boolean isSequenceSource()
  {
    String seqcap = "das1:" + Capabilities.SEQUENCE.getName();
    for (String cp : getCapabilityList(getVersionFor(source)))
    {
      if (cp.equals(seqcap))
      {
        return true;

      }
    }
    return false;
  }
  @Override
  public boolean isFeatureSource()
  {
    String seqcap = "das1:" + Capabilities.FEATURES.getName();
    for (String cp : getCapabilityList(getVersionFor(source)))
    {
      if (cp.equals(seqcap))
      {
        return true;

      }
    }
    return false;
  }

  private VERSION getVersionFor(SOURCE ds)
  {
    VERSION latest = null;
    for (VERSION v : ds.getVERSION())
    {
      if (latest == null
              || isLaterThan(latest.getCreated(), v.getCreated()))
      {
        // TODO: das 1.6 - should just get the first version - ignore other
        // versions since not specified how to construct URL from version's URI
        // + source URI
        latest = v;
      }
    }
    return latest;
  }

  private boolean isLaterThan(String ref, String newer)
  {
    Date refdate = null, newdate = null;
    try
    {
      refdate = DasTimeFormat.fromDASString(ref);

    } catch (ParseException x)
    {
      return false;
    }
    try
    {
      newdate = DasTimeFormat.fromDASString(newer);
    } catch (ParseException e)
    {
      // TODO: handle exception
    }
    if (refdate != null)
    {
      if (newdate != null)
      {
        return refdate.before(newdate);
      }
      return false;
    }
    if (newdate != null)
    {
      return true;
    }
    // assume first instance of source is newest in list. - TODO: check if
    // natural ordering of source versions is newest first or oldest first
    return false;
  }

  public String[] getLabelsFor(VERSION v)
  {
    ArrayList<String> labels = new ArrayList<String>();
    for (PROP p : v.getPROP())
    {
      if (p.getName().equalsIgnoreCase("LABEL"))
      {
        labels.add(p.getValue());
      }
    }
    return labels.toArray(new String[0]);
  }

  private CAPABILITY getCapability(Capabilities capability) {
    for (CAPABILITY p: getVersion().getCAPABILITY()) {
      if (p.getType().equalsIgnoreCase(capability.getName()) || p.getType().equalsIgnoreCase("das1:"+capability.getName()))
      {
        return p;
      }
    }
    return null;
  }
  public String[] getCapabilityList(VERSION v)
  {

    ArrayList<String> labels = new ArrayList<String>();
    for (CAPABILITY p : v.getCAPABILITY())
    {
      // TODO: work out what to do with namespace prefix
      // does SEQUENCE == das1:SEQUENCE and das2:SEQUENCE ?
      // for moment, just show all capabilities...
      if (p.getType().startsWith("das1:"))
      {
        labels.add(p.getType());
      }
    }
    return labels.toArray(new String[0]);
  }

  @Override
  public List<DbSourceProxy> getSequenceSourceProxies()
  {
    if (!isSequenceSource())
    {
      return null;
    }
    ArrayList<DbSourceProxy> seqsources = new ArrayList<DbSourceProxy>();
    if (!local)
    {
    VERSION v = getVersion();
    for (COORDINATES cs : v.getCOORDINATES())
    {

      /*
       * if (css == null || css.length == 0) { // TODO: query das source
       * directly to identify coordinate system... or // have to make up a
       * coordinate system css = new DasCoordinateSystem[] { new
       * DasCoordinateSystem() }; css[0].setName(d1s.getNickname());
       * css[0].setUniqueId(d1s.getNickname()); } for (int c = 0; c <
       * css.length; c++) {
       */
      try
      {
        seqsources.add(new DasSequenceSource("das:" + getTitle() + " ("
                + cs.getContent() + ")", cs.getContent(), source, v, cs));
      } catch (Exception e)
      {
        System.err.println("Ignoring sequence coord system " + cs + " ("
                + cs.getContent() + ") for source " + getTitle()
                + "- threw exception when constructing fetcher.\n");
        e.printStackTrace();
      }
    }
    } else {
      try
      {
        seqsources.add(new DasSequenceSource("das:"+getTitle(), getTitle(), source, getVersion(), null));
      } catch (Exception e)
      {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
      
    }
    return seqsources;
  }
  @Override
  public String getSourceURL()
  {
    try {
    String url = new RegistrySourceAdapter(source).getOriginalDataSourceUri();
    return url;
    }
    catch (Exception x)
    {
      System.err.println("Serious: Couldn't get the URL for source "+source.getTitle());
      x.printStackTrace();
    }
    return null;
  }
}