// File: ActionSave.java
// Classes: ActionSave
// Original Author: Kedar Patankar 
// Date 21 Jan 1997

package uci.graphedit;

import java.io.FilenameFilter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Vector;
import java.util.Enumeration;
import java.util.Hashtable;
import java.awt.FileDialog;
import java.awt.Point;
import demeter.Ident;

/**
 * Action to take the graph structure and write it to a file selected by user */

public class ActionSave extends Action implements FilenameFilter
{

  public ActionSave(Editor editor,Document d) {super(editor,d); }

  public String name() { return "Save Graph Structure"; }
  public boolean accept(File dir,String name)
  {
	  return name.endsWith(".gcd");
  }

  public void doIt() 
  {
	  if(_document.isSaved()&&(!_document.firstTime()))
		  return;
	  String firstName=_document.getDocName();
	  if(firstName==null) return;
	  String filename=firstName;
	  if (_document.firstTime())
	  {
		  FileDialog fd = new FileDialog(_editor, "Select Output File", FileDialog.SAVE );
		  fd.setDirectory(_editor.getIoDir());
		  fd.setFilenameFilter(this);
		  fd.setFile(firstName);
		  fd.show();
		  filename = fd.getFile();
		  if (filename == null) {return;}
		  filename=fd.getDirectory()+filename;
		  int a = filename.lastIndexOf(".*.*");
		  if (a>0)
			  filename = filename.substring(0,a);
	  
		  if (!(filename.endsWith(".gcd")))
			  filename = filename + ".gcd";
		  _document.firstTime(false);
		  _editor.updateDocname(firstName,filename);
	  }
	  

	  System.out.println("Saving file "+filename);

	  UGraph graph=new UGraph();
	  Vector nodes = _document.net().nodes();
	  Enumeration elm = nodes.elements();
	  Hashtable hTable=new Hashtable();

	  while (elm.hasMoreElements())
	  {
		  NetNode n=(NetNode)elm.nextElement();
		  Point p=n.get_Perspective().position();
		  Coordinates c=new Coordinates(new X(new Integer(p.x)),new Y(new Integer(p.y)));
		  String name=n.get_Perspective().get_first().get_label();
		  UID uid=new UID(new Integer(n.getId()));
		  UVertex u;
		  
		  if (n.get_Perspective().get_first() instanceof FigAltVert)
			  u=new UAltVertex();
		  else 
		  if (n.outSize()==0)
			  u=new UTerm();
		  else
			  u=new UConstVertex();
		  u.set_id(uid);
		  u.set_vertexname(new UVertexName(new Ident(name)));
		  u.set_position(c);
		  
		  Vector in=n.inList();
		  Enumeration inEdges = in.elements();
		  while(inEdges.hasMoreElements())
		  {
			  UID id=new UID(new Integer(((NetArc)inEdges.nextElement()).getId()));
			  u.add_incoming(id);
		  }
		  Vector out=n.outList();
		  Enumeration outEdges = out.elements();
		  while(outEdges.hasMoreElements())
		  {
			  UID id=new UID(new Integer(((NetArc)outEdges.nextElement()).getId()));
			  u.add_outgoing(id);
		  }

		  hTable.put(name,u);
		  graph.add_uvertex(u);
	  }
  
	  Enumeration elm1 = nodes.elements();

	  while (elm1.hasMoreElements())
	  {
		  NetNode n=(NetNode)elm1.nextElement();
		  String source=n.get_Perspective().get_first().get_label();

		  Vector out=n.outList();
		  Enumeration outEdges = out.elements();
		  while(outEdges.hasMoreElements())
		  {
			  NetArc na=(NetArc)(outEdges.nextElement());
			  ArcPerspective ap=na.get_perspective();
			  Fig f=ap.get_figure();
			  String dest=na.destNode().get_Perspective().get_first().get_label();
			  UID id=new UID(new Integer(na.getId()));
			  UEdge u;
			  if (f instanceof FigConstEdge)
			  {
				  u=new UConstEdge();
				  ((UConstEdge)u).set_edgename(new UEdgeName(new Ident(f.get_label())));
				  Cardinality c;
				  String card=((FigConstEdge)f).get_cardinality();
				  if (card.equals("1"))
					  c=new Cardinality(new Lower(new Integer(1)),null);
				  else
				  if (card.equals("0..1"))
				      c=new Cardinality(new Lower(new Integer(0)),
					                    new Upper(new String("1")));
				  else
				  if (card.equals("0..*"))
				      c=new Cardinality(new Lower(new Integer(0)),
					                    new Upper(new String("*")));
				  else
				  	 c=new Cardinality(new Lower(new Integer(1)),
					                    new Upper(new String("*")));
				  ((UConstEdge)u).set_card(c);
			  }
			  else
				  u=new UAltEdge();
			  u.set_id(id);
			  if(hTable.get(source)==null)
			  {System.out.println("problem source");return;}
			  if(hTable.get(dest)==null)
			  {System.out.println("problem");return;}
			  u.set_fromVertex((UVertex)hTable.get(source));
			  u.set_toVertex((UVertex)hTable.get(dest));
			  graph.add_uedge(u);
		  }
	  }

	  
	  
	  if(graph!=null)
	  {
		  String graphString=graph.GetGraphString();
		  try
		  {
			  FileOutputStream out = new FileOutputStream(filename);
			  byte[] buf = new byte[graphString.length()];
			  graphString.getBytes(0,graphString.length(),buf,0);
			  out.write(buf);
			  out.close();
		  }catch (IOException eb){eb.printStackTrace();}
	  }
	  _document.isSaved(true);
  }


  public void undoIt() { }

} /* end class ActionSave */