package org.eparapher.rcp.editors;
   
   import org.apache.log4j.Logger;
   import org.eclipse.swt.SWT;
   import org.eclipse.swt.events.SelectionEvent;
   import org.eclipse.swt.events.SelectionListener;
   import org.eclipse.swt.layout.FillLayout;
   import org.eclipse.swt.layout.GridData;
   import org.eclipse.swt.widgets.Composite;
  import org.eclipse.swt.widgets.Text;
  import org.eclipse.swt.widgets.Tree;
  import org.eclipse.swt.widgets.TreeItem;
  import org.eclipse.ui.forms.widgets.ColumnLayout;
  import org.eclipse.ui.forms.widgets.Form;
  import org.eclipse.ui.forms.widgets.FormText;
  import org.eclipse.ui.forms.widgets.FormToolkit;
  import org.eclipse.ui.forms.widgets.Section;
  import org.eclipse.ui.forms.widgets.TableWrapLayout;
  import org.eparapher.core.EParapherManager;
  import org.eparapher.rcp.tools.GUIIcons;
  
  /**
   * 
   * resources : 
   *   http://www.ibm.com/developerworks/opensource/library/os-eclipse-forms/
   *   http://www.eclipse.org/articles/Article-Forms/article.html
   *   
   * @author arnault
   *
   */
  public class SignatureTabEditor {
  
  	private static Logger log = Logger.getLogger(SignatureTabEditor.class);
  	
  	private FormToolkit signTK;
  	private Form        signForm;
  	
  	private Tree signerCertChain;
  	private Tree signerList;
  
  	private Text timeStampValue;
  	public SignatureTabEditor() {
  		super();
  	}
  
  	/**
  	 * Creates page 2 of the multi-page editor,
  	 * which allows you to change the font used in page 2.
  	 * @param parent 
  	 */
  	protected Composite createSignatureForm(Composite parent) {
  
  		Composite composite = new Composite(parent, SWT.NONE);
  		FillLayout layout = new FillLayout();
  		composite.setLayout(layout);
  		
  		//Use eclipse Forms
  		signTK   = new FormToolkit(composite.getDisplay());
  		signForm = signTK.createForm(composite);
  		signForm.setLayoutData(new GridData(GridData.FILL_BOTH));
  		
  		//Set title
  		signForm.setText("Signature informations");
  		signForm.setImage(GUIIcons.CERTIFICATE_SEL_ICON_IMAGE);
  		signTK.decorateFormHeading(signForm);
  		
  		//Set Layout
  		ColumnLayout cl = new ColumnLayout();
  		cl.minNumColumns = 2;
  		cl.maxNumColumns = 2;
  		signForm.getBody().setLayout(cl);
  		
  		buildSignatureList();
  		showSignerX509Chain();
  		//showCRLs();
  		buildSignatureDetails();
  		showTimestamp();
        	
        	return composite;
  	}
  
  	private void buildSignatureList() {
  
      	Section section = signTK.createSection(signForm.getBody(), Section.DESCRIPTION | Section.TITLE_BAR| Section.TWISTIE|Section.EXPANDED);
        	section.setText("Signatures");
        	section.setDescription("List of signatures :");
  		
        	Composite sectionClient = signTK.createComposite(section);
        	sectionClient.setLayout(new FillLayout());
        	//sectionClient.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        	
        	signerList = signTK.createTree(sectionClient, SWT.BORDER );
        	//signerList.setLayout()
        	// Build tree items
        	for (int i = 13; i >=0 ; i--) {
        		TreeItem item = new TreeItem(signerList,SWT.NONE);
        		item.setImage(GUIIcons.FILE_ICON_CMS);
      		item.setText("Signature n°"+i);
      		item.setData(new Integer(i));
     		item.setExpanded(true);
 		}
       	signerList.addSelectionListener(new SignatureSelection());
       	
       	section.setClient(sectionClient);
 	}
 
 	private void showSignerX509Chain() {
 		Section section = signTK.createSection(signForm.getBody(), Section.TITLE_BAR| Section.TWISTIE|Section.EXPANDED);
 		//section.setLayoutData(new GridData(GridData.FILL_BOTH));
 		//section.addExpansionListener(new ExpAdaptor());
 		section.setText("Signer certificate chain");
 		section.setDescription("Signer certificate chain :");
 
 		Composite sectionClient = signTK.createComposite(section);
 		sectionClient.setLayout(new FillLayout());
 		//sectionClient.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 
       	signerCertChain = signTK.createTree(sectionClient, SWT.BORDER | SWT.BORDER_DASH);
       	//signerCertChain.setLayout(new ColumnLayoutData());
 		// Build tree items
 		TreeItem lastItem = null;
       	for (int i = 3; i >=0 ; i--) {
       		TreeItem item;
       		if (i == 3)
       			item = new TreeItem(signerCertChain,SWT.NONE);
       		else
       			item = new TreeItem(lastItem,SWT.NONE);
       		item.setImage(GUIIcons.CERTIFICATE_ICON_IMAGE);
     		item.setText("certificate "+i);
     		item.setData(new Integer(i));
     		if (lastItem!=null)
     			lastItem.setExpanded(true);
     		lastItem = item;
 		}
 	    signerCertChain.addSelectionListener(new SignatureSelection());
 	    signTK.paintBordersFor(sectionClient);
 	    
 	    section.setClient(sectionClient);
 	}
 	private void buildSignatureDetails() {
 		
     	Section section = signTK.createSection(signForm.getBody(), Section.DESCRIPTION | Section.TITLE_BAR| Section.TWISTIE|Section.EXPANDED);
     	//section.setLayoutData(new ColumnLayoutData());
       	section.setText("Signature Details");
       	section.setDescription("signatures fields :");
 
 		
       	Composite sectionComposite = signTK.createComposite(section);
       	sectionComposite.setLayout(new FillLayout());
       	
       	String text = "<form>";
       	text += "<li>Delivered to : <b>test</b></li>";
       	text += "</form>";
       	
       	FormText formText = signTK.createFormText(sectionComposite, true);
       	formText.setText(text, true, false);
       	//formText.setLayoutData(new TableWrapData(TableWrapData.FILL));
       	
       	section.setClient(sectionComposite);
 		
 	}
 
 	private void showTimestamp() {
 		
     	Section section = signTK.createSection(signForm.getBody(), Section.DESCRIPTION | Section.TITLE_BAR| Section.TWISTIE|Section.EXPANDED);
     	//section.setLayoutData(new ColumnLayoutData());
       	section.setText("Timestamp");
       	section.setDescription("time information :");
 
 		
       	Composite sectionComposite = signTK.createComposite(section);
       	sectionComposite.setLayout(new TableWrapLayout());
       	
       	String text = "<form>";
       	text += "<li>signature date : <b>date</b></li>";
       	text += "<li>certified by : <b>TSA Name/DN/URL</b></li>";
       	text += "</form>";
       	
       	FormText formText = signTK.createFormText(sectionComposite, true);
       	formText.setText(text, true, false);
       	/*
       	ExpandableComposite expcomposite = signTK.createExpandableComposite(
       			sectionComposite, 
     			ExpandableComposite.TREE_NODE|
     			ExpandableComposite.CLIENT_INDENT);
     	expcomposite.setText("Timestamp Binary Value");
       	signTK.paintBordersFor(expcomposite);
       	TableWrapData td = new TableWrapData();
     	td.maxHeight = 200;
     	td.maxWidth = 400;
     	expcomposite.setLayout(new TableWrapLayout());
     	expcomposite.setLayoutData(td);
 
     	
     	timeStampValue = signTK.createText(expcomposite, "", SWT.BORDER|SWT.READ_ONLY|SWT.WRAP|SWT.H_SCROLL);
     	expcomposite.setClient(timeStampValue);
     	expcomposite.addExpansionListener(new ExpansionAdapter() {
     		public void expansionStateChanged(ExpansionEvent e) {
     			signForm.update();
     		}
     	});
       	
     	String tsvalue = "303e02010106022a033021300906052b0e03021a050004140000000000000000000000000000000000000000"
     		+ "020118180f32303035313130313038313732315a";
     	timeStampValue.setText(tsvalue);
     	timeStampValue.setLayoutData(td);
       	*/
       	section.setClient(sectionComposite);
 	}
 	public void dispose() {
 		signForm.dispose();
 		signTK.dispose();
 	}
 	/**
 	 * Change Signature details while selecting a new signature
 	 * @author arnault
 	 *
 	 */
 	class SignatureSelection implements SelectionListener {
 		public void widgetSelected(SelectionEvent e) {
 			log.info("Signature details not implemented Yet! " + (e.item));
 		}
 
 		public void widgetDefaultSelected(SelectionEvent e) {
 			//change things
 			EParapherManager.getInstance().getUI().infoMessage("Not implemented Yet! Come back later...");
 		}
 	}
 
 	/**
 	 * Show certificate details on double click
 	 * @author arnault
 	 *
 	 */
 	class CertificateSelection implements SelectionListener {
 		public void widgetSelected(SelectionEvent e) {
 		}
 
 		public void widgetDefaultSelected(SelectionEvent e) {
 			EParapherManager.getInstance().getUI().infoMessage("Not implemented Yet! Come back later...");
 			/*
 			int selCertindex =  ((Integer) e.item.getData()).intValue();
 			if (selCertindex!=0) {
 				X509Certificate[] newcertchaintoview = new X509Certificate[certchain.length-selCertindex];
 				for (int i = selCertindex; i <certchain.length ; i++) {
 					newcertchaintoview[i-selCertindex] = certchain[i];
 				}
 				CertificateViewerDialog cvg = new CertificateViewerDialog(newcertchaintoview);
 				cvg.open();
 			}*/
 		}
 	}
 	
 }