/*******************************************************************************
 * Copyright (c) 2007, 2009 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
 *******************************************************************************/
package org.eclipse.pde.api.tools.ui.internal.properties;

import java.util.HashMap;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.pde.api.tools.ui.internal.IApiToolsConstants;
import org.eclipse.pde.api.tools.ui.internal.IApiToolsHelpContextIds;
import org.eclipse.pde.api.tools.ui.internal.SWTFactory;
import org.eclipse.pde.api.tools.ui.internal.preferences.ApiErrorsWarningsConfigurationBlock;
import org.eclipse.pde.api.tools.ui.internal.preferences.ApiErrorsWarningsPreferencePage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Link;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.dialogs.PropertyPage;
import org.eclipse.ui.preferences.IWorkbenchPreferenceContainer;

/**
 * Provides a property page for projects to allow project specific API tooling 
 * settings to be applied;
 *  
 * @since 1.0.0
 */
public class ApiErrorsWarningsPropertyPage extends PropertyPage {

	/**
	 * The data map passed when showing the page
	 */
	private HashMap fPageData = null;
	
	ApiErrorsWarningsConfigurationBlock block = null;
	Button pspecific = null;
	Link link = null;
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite)
	 */
	protected Control createContents(Composite parent) {
		Composite comp  = SWTFactory.createComposite(parent, 1, 1, GridData.FILL_BOTH, 0, 0);
		Composite tcomp = SWTFactory.createComposite(comp, 2, 1, GridData.FILL_HORIZONTAL, 0, 0);
		pspecific = SWTFactory.createCheckButton(tcomp, PropertiesMessages.ApiErrorWarningsPropertyPage_0, null, false, 1);
		GridData gd = (GridData) pspecific.getLayoutData();
		gd.horizontalAlignment = GridData.BEGINNING;
		gd.verticalAlignment = GridData.CENTER;
		pspecific.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				boolean psp = pspecific.getSelection();
				block.useProjectSpecificSettings(psp);
				if(link != null) {
					link.setEnabled(!psp);
				}
			}
		});
		
		if(offerLink()) {
			link = new Link(tcomp, SWT.NONE);
			link.setLayoutData(new GridData(GridData.END, GridData.CENTER, true, false));
			link.setFont(comp.getFont());
			link.setText(PropertiesMessages.ApiErrorWarningsPropertyPage_1); 
			link.addSelectionListener(new SelectionAdapter() {
				public void widgetSelected(SelectionEvent e) {
					HashMap data = new HashMap();
					data.put(ApiErrorsWarningsPreferencePage.NO_LINK, Boolean.TRUE);
					SWTFactory.showPreferencePage(getShell(), IApiToolsConstants.ID_ERRORS_WARNINGS_PREF_PAGE, data);
				};
			});
		}
		//collect project
		block = new ApiErrorsWarningsConfigurationBlock(getProject(), (IWorkbenchPreferenceContainer)getContainer());
		block.createControl(comp);
		
		boolean ps = block.hasProjectSpecificSettings(getProject());
		pspecific.setSelection(ps);
		block.useProjectSpecificSettings(ps);
		if(link != null) {
			link.setEnabled(!ps);
		}
		PlatformUI.getWorkbench().getHelpSystem().setHelp(parent, IApiToolsHelpContextIds.APITOOLS_ERROR_WARNING_PROP_PAGE);
		return comp;
	}
	
	/**
	 * @return true if the link should be shown, false otherwise
	 */
	private boolean offerLink() {
		return fPageData == null || !Boolean.TRUE.equals(fPageData.get(ApiErrorsWarningsPreferencePage.NO_LINK));
	}
	
	/**
	 * @return the backing {@link IProject} for this page or <code>null</code> if there isn't one
	 */
	private IProject getProject() {
		IAdaptable element = getElement();
		if(element instanceof IJavaProject) {
			return ((IJavaProject)element).getProject();
		}
		if(element instanceof IProject) {
			return (IProject) element;
		}
		return null;
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.preference.PreferencePage#performCancel()
	 */
	public boolean performCancel() {
		block.performCancel();
		return super.performCancel();
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.preference.PreferencePage#performOk()
	 */
	public boolean performOk() {
		block.performOK();
		return super.performOk();
	}
	
	/**
	 * @see org.eclipse.jface.preference.PreferencePage#performDefaults()
	 */
	protected void performDefaults() {
		block.performDefaults();
		super.performDefaults();
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.preference.PreferencePage#performApply()
	 */
	protected void performApply() {
		block.performApply();
		super.performApply();
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.dialogs.DialogPage#dispose()
	 */
	public void dispose() {
		block.dispose();
		super.dispose();
	}
	
	/**
	 * @see org.eclipse.jface.preference.PreferencePage#applyData(java.lang.Object)
	 */
	public void applyData(Object data) {
		if(data instanceof HashMap) {
			fPageData = (HashMap) data;
			if(link != null) {
				link.setVisible(!Boolean.TRUE.equals(fPageData.get(ApiErrorsWarningsPreferencePage.NO_LINK)));
			}
		}
	}
}
