/*
* Copyright (c) 2002 IBM Corporation and others.
* All rights reserved.   This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
* 
* Contributors:
*   IBM - Initial API and implementation
*   Jens Lukowski/Innoopract - initial renaming/restructuring
* 
*/

package org.eclipse.wst.common.ui.wizards;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.jface.wizard.IWizard;
import org.eclipse.jface.wizard.IWizardPage;
import org.eclipse.ui.dialogs.WizardNewProjectCreationPage;
import org.eclipse.wst.common.ui.UIPlugin;

public class ExampleProjectCreationWizardPage extends WizardNewProjectCreationPage {

	private IConfigurationElement configurationElement;

	public ExampleProjectCreationWizardPage(int pageNumber, IConfigurationElement elem) {

		super("page" + pageNumber); //$NON-NLS-1$
		configurationElement = elem;

		String name = getAttribute(elem, "name"); //$NON-NLS-1$
		setInitialProjectName(calculateInitialProjectName(name));

		setDescription(getAttribute(configurationElement, "pagedescription")); //$NON-NLS-1$
		setTitle(getAttribute(configurationElement, "pagetitle")); //$NON-NLS-1$

	}

	/*
	 * Set the default project name that is to appear on the initialPage page
	 * of this wizard.
	 */
	protected String calculateInitialProjectName(String projectName) {
		IProject projectHandle = ResourcesPlugin.getWorkspace().getRoot().getProject(projectName);
		if (!projectHandle.exists()) {
			return projectName;
		}
		// Change the name until it doesn't exists. Try 9 times and then
		// give up.
		for (int i = 1; i < 10; i++) {
			projectHandle = ResourcesPlugin.getWorkspace().getRoot().getProject(projectName + i);
			if (!projectHandle.exists()) {
				return projectName + i;
			}
		}
		return projectName + "9"; //$NON-NLS-1$

	}

	private String getAttribute(IConfigurationElement elem, String tag) {
		String res = elem.getAttribute(tag);
		if (res == null) {
			return '!' + tag + '!';
		}
		return res;
	}


	/**
	 * Returns the configuration element of this page.
	 * 
	 * @return Returns a IConfigurationElement
	 */
	public IConfigurationElement getConfigurationElement() {
		return configurationElement;
	}

	/**
	 * @see org.eclipse.ui.dialogs.WizardNewProjectCreationPage#validatePage()
	 */
	protected boolean validatePage() {
		if (!super.validatePage())
			return false;

		String projectName = getProjectName();
		if (projectName == null)
			return false;

		IWizard wizard = getWizard();
		if (wizard instanceof ExampleProjectCreationWizard) {
			IWizardPage[] pages = wizard.getPages();
			for (int i = 0; i < pages.length; i++) {
				if ((pages[i] != this) && (pages[i] instanceof ExampleProjectCreationWizardPage)) {
					if (projectName.equals(((ExampleProjectCreationWizardPage) pages[i]).getProjectName())) {
						setErrorMessage(UIPlugin.getResourceString("ExampleProjectCreationWizardPage.error.alreadyexists")); //$NON-NLS-1$
						return false;
					}
				}
			}
		}

		return true;
	}


}