package org.eparapher.rcp.actions;

import java.io.File;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.ui.IWorkbenchWindow;
import org.eparapher.core.encryption.CMSEncryption;
import org.eparapher.core.encryption.CMSEncryptionParameters;
import org.eparapher.core.encryption.DefaultEncryptionParameters;
import org.eparapher.core.encryption.GenericCypher;
import org.eparapher.core.tools.DefaulteParapherParameters;
import org.eparapher.rcp.tools.GUIIcons;
import org.eparapher.rcp.tools.RCPGUI;

public class CMSDecryptionAction extends GenericDecryptionAction {

	public static final String[] CMS_EXTENTION = { ".p7m", ".ent" };

	public CMSDecryptionAction() {
		super(null, true, "CMS decryption");
	}
	
	public CMSDecryptionAction(TreeViewer mviewer, boolean museWizard) {
		super(mviewer, museWizard, "CMS decryption");
	}
	
	public CMSDecryptionAction(IWorkbenchWindow mwindow) {
		super(mwindow, "CMS decryption");
	}
	
	public CMSDecryptionAction(String[] files, boolean museWizard) {
		super(null, museWizard, "CMS decryption");
		filesForAction = files;
	}

	@Override
	void decryptFile(IProgressMonitor monitor, File file, GenericCypher cipher,
			DefaultEncryptionParameters encparams) {
		monitor.subTask("Decrypting "+file.getName());
		cipher.decrypt(file.getAbsolutePath(), encparams);
		monitor.worked(1);
	}

	@Override
	GenericCypher getCypher() {
		return new CMSEncryption();
	}

	@Override
	void postdecryption(IProgressMonitor monitor, GenericCypher cipher,
			DefaultEncryptionParameters encparams) {
	}

	@Override
	void predecryption(IProgressMonitor monitor, GenericCypher cipher,
			DefaultEncryptionParameters encparams) {
	}

	@Override
	void buildAction() {
		this.setId("DecryptAction");
		this.setText("CMS decryption");
		this.setToolTipText("Decrypt your private files");
		this.setImageDescriptor(GUIIcons.DECRYPTION_ICON);
		this.setAccelerator(SWT.CTRL | 'R');
	}

	@Override
	DefaulteParapherParameters getParameters() {
		CMSEncryptionParameters cmsencparams = new CMSEncryptionParameters();
		cmsencparams.setCMSEncryptionParamsFromPreferences();
		
		if (viewer !=null)
			cmsencparams.setFileSelection(getFileSelectionFromView());

		if (filesForAction != null)
			cmsencparams.setFileSelection(getFileSelectionFromParameters());
		
		return cmsencparams;
	}

	@Override
	boolean isFileWithCorrectFormat(File file2verify) {
		String filename = file2verify.getName();
		for (int i = 0; i < CMS_EXTENTION.length; i++) {
			if (filename.toLowerCase().endsWith(CMS_EXTENTION[i]))
				return true;
		}
		return false;
	}

}