/*******************************************************************************
 * Copyright (c) 2008-2010 Sonatype, Inc.
 * 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:
 *      Sonatype, Inc. - initial API and implementation
 *******************************************************************************/

package org.eclipse.m2e.scm.internal.actions;

import java.util.Iterator;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchWindow;

import org.eclipse.m2e.core.ui.internal.M2EUIPluginActivator;
import org.eclipse.m2e.scm.ScmUrl;
import org.eclipse.m2e.scm.internal.wizards.MavenCheckoutWizard;


/**
 * Checkout as Maven project action
 * 
 * @author @author Eugene Kuleshov
 */
public class CheckoutAsMavenAction implements IObjectActionDelegate {

  private IStructuredSelection selection;

  private IWorkbenchPart targetPart;

  /* (non-Javadoc)
   * @see org.eclipse.ui.actions.ActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, org.eclipse.jface.viewers.ISelection)
   */
  public void selectionChanged(IAction action, ISelection selection) {
    if(selection instanceof IStructuredSelection) {
      this.selection = (IStructuredSelection) selection;
    }
  }

  public void setActivePart(IAction action, IWorkbenchPart targetPart) {
    this.targetPart = targetPart;
  }

  /* (non-Javadoc)
   * @see org.eclipse.ui.actions.ActionDelegate#run(org.eclipse.jface.action.IAction)
   */
  public void run(IAction action) {
    ScmUrl[] urls = null;
    if(selection != null) {
      urls = new ScmUrl[selection.size()];
      int i = 0;
      for(Iterator<?> it = selection.iterator(); it.hasNext();) {
        urls[i++ ] = (ScmUrl) it.next();
      }
    }

    MavenCheckoutWizard wizard = new MavenCheckoutWizard(urls);
    WizardDialog dialog = new WizardDialog(getShell(), wizard);
    dialog.open();
  }

  protected Shell getShell() {
    Shell shell = null;
    if(targetPart != null) {
      shell = targetPart.getSite().getShell();
    }
    if(shell != null) {
      return shell;
    }

    IWorkbench workbench = M2EUIPluginActivator.getDefault().getWorkbench();
    if(workbench == null) {
      return null;
    }

    IWorkbenchWindow window = workbench.getActiveWorkbenchWindow();
    return window == null ? null : window.getShell();
  }

}