package org.eparapher.rcp.actions;

import java.io.File;

import org.apache.log4j.Logger;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.window.Window;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.swt.SWT;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eparapher.core.EParapherManager;
import org.eparapher.core.signature.DefaultSignatureParameters;
import org.eparapher.core.signature.GenericSigner;
import org.eparapher.core.signature.XMLSignatureParameters;
import org.eparapher.core.signature.XMLSigner;
import org.eparapher.rcp.tools.GUIIcons;
import org.eparapher.rcp.wizards.XMLSigningWizard;

public class XMLSignDocumentAction extends GenericSignatureAction {

	private static Logger log = Logger.getLogger(ToPDFAndSignDocumentAction.class);

	public XMLSignDocumentAction() {
		super(null, true, "XML DSig signing");
	}
	
	public XMLSignDocumentAction(TreeViewer mviewer, boolean museWizard) {
		super(mviewer, museWizard, "XML DSig signing");
	}
	
	public XMLSignDocumentAction(IWorkbenchWindow mwindow) {
		super(mwindow, "XML Dsig signing");
	}
	
	public XMLSignDocumentAction(String[] files, boolean museWizard) {
		super(null, museWizard, "XML Dsig signing");
		filesForAction = files;
	}
	
	@Override
	void buildAction() {
		this.setId("XMLSignDocumentAction");
		this.setImageDescriptor(GUIIcons.XML_ICON);
		if (!usewizard) {
			this.setText("XML DSig Signature");
			this.setToolTipText("Digitally sign XML file(s) with default parameters");
			this.setAccelerator(SWT.CTRL | 'J');
		} else {
			this.setText("XML DSig Signature (wizard)");
			this.setToolTipText("Digitally sign XML file(s) using a wizard");
			this.setAccelerator(SWT.CTRL | 'K');
		}
	}

	protected DefaultSignatureParameters getParameters() {
		
		XMLSignatureParameters xmlsignparams = new XMLSignatureParameters();
		xmlsignparams.setXMLSignatureParamsFromPreferences();
		if (viewer != null)
			xmlsignparams.setFileSelection(getFileSelectionFromView());

		if (filesForAction != null)
			xmlsignparams.setFileSelection(getFileSelectionFromParameters());
		
		if (usewizard) {
			//Launch Wizard to get PDF Signature Parameters
			XMLSigningWizard xmlWizard = new XMLSigningWizard(xmlsignparams);
			if (window==null)
				window=PlatformUI.getWorkbench().getActiveWorkbenchWindow();
			WizardDialog dialog = new WizardDialog(window.getShell(), xmlWizard );
			if ( dialog.open() != Window.OK ) {
				log.info("XML DSig signature options wizard cancelled");
				return null;
			}
			//recover params from wizard
			xmlsignparams = xmlWizard.getXMLSignatureParams();
		}
		return xmlsignparams;
	}

	@Override
	GenericSigner getSigner() {
		return new XMLSigner();
	}

	@Override
	boolean isFileWithCorrectFormat(File file2verify) {
		for (String xmlExtention : XMLSignatureParameters.XMLExtentions) {
			if (file2verify.getName().toLowerCase().endsWith(xmlExtention))
				return true;
			break;
		}
		//TODO : improve XML Detection : read file Header to detect "<?xml ..."
		return false;
	}

	@Override
	void presignature(IProgressMonitor monitor, GenericSigner signer,
			DefaultSignatureParameters signparams) {
		// Nothing to do here		
	}
	@Override
	void signFile(IProgressMonitor monitor, File file, 
			GenericSigner signer, DefaultSignatureParameters signparams) {
		if (isFileWithCorrectFormat(file)) {
			monitor.subTask("Signing "+file.getName());
			signer.sign( file.getAbsolutePath(), signparams);
			monitor.worked(1);
		} else {
			final String message = "Cannot apply XML DSig on : " + file.getAbsolutePath() ;
			EParapherManager.getInstance().getUI().warnMessage(message);
		}
	}
	@Override
	void postsignature(IProgressMonitor monitor, GenericSigner signer,
			DefaultSignatureParameters signparams) {
		// Nothing to do here
		
	}
}