/*******************************************************************************
 * Copyright (c) 2005, 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 * IBM Corporation - initial API and implementation
 * yyyymmdd bug      Email and other contact information
 * -------- -------- -----------------------------------------------------------
 * 20060315   128711 joan@ca.ibm.com - Joan Haggarty
 *******************************************************************************/
package org.eclipse.wst.command.internal.env.ui.dialog;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Plugin;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchPartReference;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.part.ISetSelectionTarget;
import org.eclipse.wst.command.internal.env.common.FileResourceUtils;
import org.eclipse.wst.command.internal.env.core.common.ProgressUtils;
import org.eclipse.wst.command.internal.env.core.common.StatusUtils;
import org.eclipse.wst.command.internal.env.core.context.ResourceContext;
import org.eclipse.wst.command.internal.env.core.context.TransientResourceContext;
import org.eclipse.wst.command.internal.env.plugin.EnvPlugin;
import org.eclipse.wst.command.internal.env.ui.EnvironmentUIMessages;
import org.eclipse.wst.command.internal.env.ui.plugin.EnvUIPlugin;
import org.eclipse.wst.common.environment.IStatusHandler;
import org.eclipse.wst.common.environment.NullStatusHandler;

public class AntFileImportWizard extends Wizard implements INewWizard {

	//private IConfigurationElement fConfigElement;
	private AntFileImportWizardPage mainPage;
	/**
     * The workbench.
     */
    private IWorkbench workbench;

    /**
     * The current selection.
     */
    protected IStructuredSelection selection;
    
	public AntFileImportWizard()
	{
		super();		 
		setWindowTitle(EnvironmentUIMessages.WIZARD_TITLE_ANT);
	}
	
	public void setWindowTitle(String newTitle) {
		super.setWindowTitle(newTitle);
	}
	
	 public void addPages() {
	        super.addPages();	        
	        mainPage = new AntFileImportWizardPage(EnvironmentUIMessages.WIZARD_PAGE_TITLE_ANT, getSelection());
            addPage(mainPage);
	    }
	
	public boolean performFinish() {	
		IPath destination = mainPage.getPath();
		if (destination == null)
		{
			return false;
		}			
		else
		{
			//jvh: TODO: add extension so extenders of the command framework can register properties files to import
			//  here we pick up all registered Ant files and import - also would be nice to allow user to choose a subset
			String[] sourceFiles = new String[]{"ant/wsgen.xml", "ant/axisclient.properties", "ant/axisservice.properties"}; //$NON-NLS$
			int filecount = 0;
			for (int i = 0; i < sourceFiles.length; i++) {
				String fileSource = sourceFiles[i];
				String targetFile = fileSource;
				//strip any leading segments off of targetFile
				int fileStart = targetFile.lastIndexOf("/");
				if (fileStart >= 0)
				{
				  targetFile = targetFile.substring(fileStart);
				}
				Plugin sourcePlugin = EnvPlugin.getInstance();  
				//jvh: TODO - add real progress monitor in here...
								
				IStatus status = copyIFile(sourcePlugin, fileSource, destination, targetFile, (IProgressMonitor)new NullProgressMonitor());
				if (status == Status.CANCEL_STATUS)
				{
					filecount++;
				}								
			}
			if (filecount == sourceFiles.length)
			{
				return false;  //don't close if all files were not written out - give user opportunity to change destination
			}
		}
	    return true;		
  }	
	
	private IStatus copyIFile(Plugin plugin, String source, IPath targetPath, String targetFile, /*IEnvironment env,*/ IProgressMonitor monitor )
	{
	    
	  if (plugin != null)
	  {
	    IPath target = targetPath.append(new Path(targetFile));
	    
	    ProgressUtils.report( monitor, EnvironmentUIMessages.MSG_STATUS_COPYING_ANT_FILES);
	    try
	    {
	       ResourceContext context = new TransientResourceContext();
	       // check to see if file exists before copy
	       IResource resource = FileResourceUtils.findResource(target);	     
	       
	       if (resource != null)
			{
				MessageBox overwriteBox = new MessageBox(getShell(), SWT.ICON_QUESTION|SWT.YES|SWT.NO);
				overwriteBox.setMessage(EnvironmentUIMessages.bind(EnvironmentUIMessages.MSG_WARNING_FILE_EXISTS, target.toString()));				
				overwriteBox.setText(EnvironmentUIMessages.DIALOG_TITLE_OVERWRITE);
				int result = overwriteBox.open();
				if (result != SWT.NO)
					FileResourceUtils.createFile(context, target, plugin.openStream(new Path(source)),
                            monitor, (IStatusHandler)new NullStatusHandler());
				else 
					return Status.CANCEL_STATUS;
			}       
			else 
			{
				FileResourceUtils.createFile(context, target, plugin.openStream(new Path(source)),
                                    monitor, (IStatusHandler)new NullStatusHandler());
			}
	    }
	    catch (Exception e) {	    	
	      return StatusUtils.errorStatus(EnvironmentUIMessages.MSG_ERR_COPYING_ANT_FILES, e);
	    }
	  }	  
	  return Status.OK_STATUS;
	}
	
    /**
     * Returns the selection which was passed to <code>init</code>.
     *
     * @return the selection
     */
    public IStructuredSelection getSelection() {
        return selection;
    }

    /**
     * Returns the workbench which was passed to <code>init</code>.
     *
     * @return the workbench
     */
    public IWorkbench getWorkbench() {
        return workbench;
    }

    /**
     * The <code>BasicNewResourceWizard</code> implementation of this 
     * <code>IWorkbenchWizard</code> method records the given workbench and
     * selection, and initializes the default banner image for the pages
     * by calling <code>initializeDefaultPageImageDescriptor</code>.
     * Subclasses may extend.
     */
    public void init(IWorkbench workbench, IStructuredSelection currentSelection) {
        this.workbench = workbench;
        this.selection = currentSelection;

        initializeDefaultPageImageDescriptor();
    }

    /**
     * Initializes the default page image descriptor to an appropriate banner.
     * By calling <code>setDefaultPageImageDescriptor</code>.
     * The default implementation of this method uses a generic new wizard image.
     * <p>
     * Subclasses may reimplement.
     * </p>
     */
    protected void initializeDefaultPageImageDescriptor() {
    	ImageDescriptor desc = EnvUIPlugin.getImageDescriptor("icons/full/wizban/newantfiles_wiz.png");//$NON-NLS-1$
        setDefaultPageImageDescriptor(desc);
    }

    /**
     * Selects and reveals the newly added resource in all parts
     * of the active workbench window's active page.
     *
     * @see ISetSelectionTarget
     */
    protected void selectAndReveal(IResource newResource) {
        selectAndReveal(newResource, getWorkbench().getActiveWorkbenchWindow());
    }

    /**
     * Attempts to select and reveal the specified resource in all
     * parts within the supplied workbench window's active page.
     * <p>
     * Checks all parts in the active page to see if they implement <code>ISetSelectionTarget</code>,
     * either directly or as an adapter. If so, tells the part to select and reveal the
     * specified resource.
     * </p>
     *
     * @param resource the resource to be selected and revealed
     * @param window the workbench window to select and reveal the resource
     * 
     * @see ISetSelectionTarget
     */
    public static void selectAndReveal(IResource resource,
            IWorkbenchWindow window) {
        // validate the input
        if (window == null || resource == null)
            return;
        IWorkbenchPage page = window.getActivePage();
        if (page == null)
            return;

        // get all the view and editor parts
        List parts = new ArrayList();
        IWorkbenchPartReference refs[] = page.getViewReferences();
        for (int i = 0; i < refs.length; i++) {
            IWorkbenchPart part = refs[i].getPart(false);
            if (part != null)
                parts.add(part);
        }
        refs = page.getEditorReferences();
        for (int i = 0; i < refs.length; i++) {
            if (refs[i].getPart(false) != null)
                parts.add(refs[i].getPart(false));
        }

        final ISelection selection = new StructuredSelection(resource);
        Iterator itr = parts.iterator();
        while (itr.hasNext()) {
            IWorkbenchPart part = (IWorkbenchPart) itr.next();

            // get the part's ISetSelectionTarget implementation
            ISetSelectionTarget target = null;
            if (part instanceof ISetSelectionTarget)
                target = (ISetSelectionTarget) part;
            else
                target = (ISetSelectionTarget) part
                        .getAdapter(ISetSelectionTarget.class);

            if (target != null) {
                // select and reveal resource
                final ISetSelectionTarget finalTarget = target;
                window.getShell().getDisplay().asyncExec(new Runnable() {
                    public void run() {
                        finalTarget.selectReveal(selection);
                    }
                });
            }
        }
    }
	
}