/*
 * Copyright (c) 2003-2004 Christopher Lenz 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:
 *     Christopher Lenz - initial API and implementation
 * 
 * $Id: CssPropertyPage.java,v 1.1 2004-09-02 18:11:49 jsurfer Exp $
 */

package net.sourceforge.phpeclipse.css.ui.internal.properties;

import java.util.Arrays;
import java.util.Comparator;

import net.sourceforge.phpeclipse.css.core.CssCore;
import net.sourceforge.phpeclipse.css.core.internal.CssCorePreferences;
import net.sourceforge.phpeclipse.css.core.internal.profiles.ProfileManager;
import net.sourceforge.phpeclipse.css.core.profiles.IProfileDescriptor;
import net.sourceforge.phpeclipse.css.core.profiles.IProfileManager;
import net.sourceforge.phpeclipse.css.ui.internal.CssUIMessages;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.Preferences;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Group;
import org.eclipse.ui.dialogs.PropertyPage;

/**
 * Property page for CSS projects and files.
 */
public class CssPropertyPage extends PropertyPage {

	// Instance Variables ------------------------------------------------------

	private IProfileManager profileManager;

	private boolean useCustomSettings;
	private Group profileGroup;
	private Button[] profileButtons;
	private String selectedProfile;

	// Constructors ------------------------------------------------------------

	/**
	 * Constructor.
	 */
	public CssPropertyPage() {
		profileManager = CssCore.getDefault().getProfileManager();
	}

	// PropertyPage Implementation ---------------------------------------------

	/**
	 * @see org.eclipse.jface.preference.PreferencePage#createContents(Composite)
	 */
	protected Control createContents(Composite parent) {

		Composite composite = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.numColumns = 1;
		composite.setLayout(layout);

		Object element = getElement();
		if (element instanceof IResource) {
			IResource resource = (IResource) element;
			try {
				selectedProfile = resource.getPersistentProperty(
					ProfileManager.PROFILE_PROPERTY);
			} catch (CoreException e) {
				// ignore
			}
		}
		useCustomSettings = (selectedProfile != null);
		if (selectedProfile == null) {
			selectedProfile = getInheritedProfile();
		}

		Button useInheritedSettingsButton =
			new Button(composite, SWT.RADIO | SWT.LEFT);
		if (element instanceof IProject) {
			useInheritedSettingsButton.setText(
				getString("useWorkspaceSettings")); //$NON-NLS-1$
		} else if (element instanceof IResource) {
			useInheritedSettingsButton.setText(
				getString("useProjectSettings")); //$NON-NLS-1$
		}
		useInheritedSettingsButton.setSelection(!useCustomSettings);
		Button useCustomSettingsButton =
			new Button(composite, SWT.RADIO | SWT.LEFT);
		useCustomSettingsButton.setText(
				getString("useCustomSettings")); //$NON-NLS-1$
		useCustomSettingsButton.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				useCustomSettings =
					((Button) event.widget).getSelection();
				updateProfileGroup();
			}
		});
		useCustomSettingsButton.setSelection(useCustomSettings);

		profileGroup = new Group(composite, SWT.SHADOW_ETCHED_IN);
		layout = new GridLayout();
		layout.numColumns = 1;
		profileGroup.setLayout(layout);
		profileGroup.setText(getString("profile")); //$NON-NLS-1$

		IProfileManager mgr = CssCore.getDefault().getProfileManager();
		IProfileDescriptor[] profiles = mgr.getProfileDescriptors();
		Arrays.sort(profiles, new Comparator() {
			public int compare(Object o1, Object o2) {
				return ((IProfileDescriptor) o1).getName().compareTo(
						((IProfileDescriptor) o2).getName());
			}
		});

		profileButtons = new Button[profiles.length];
		for (int i = 0; i < profiles.length; i++) {
			Button button = new Button(profileGroup, SWT.RADIO | SWT.LEFT);
			button.setText(profiles[i].getName());
			button.setData(profiles[i].getId());
			if (profiles[i].getId().equals(selectedProfile)) {
				button.setSelection(true);
			}
			button.addSelectionListener(new SelectionAdapter() {
				public void widgetSelected(SelectionEvent event) {
					selectedProfile = (String) event.widget.getData();
				}
			});
			profileButtons[i] = button;
		}
		updateProfileGroup();

		return composite;
	}

	/**
	 * @see org.eclipse.jface.preference.IPreferencePage#performOk()
	 */
	public boolean performOk() {
		Object element = getElement();
		if (element instanceof IResource) {
			IResource resource = (IResource) element;
			if (useCustomSettings) {
				profileManager.setProfile(resource, selectedProfile);
			} else {
				profileManager.setProfile(resource, null);
			}
		}
		return true;
	}

	// Private Methods ---------------------------------------------------------

	private String getInheritedProfile() {
		Object element = getElement();
		String retVal = null;		 
		if (element instanceof IResource) {
			IProject project = ((IResource) element).getProject();
			try {
				retVal = project.getPersistentProperty(
					ProfileManager.PROFILE_PROPERTY);
			} catch (CoreException e) {
				// ignore
			}
		}
		if (retVal == null) {
			Preferences preferences =
					CssCore.getDefault().getPluginPreferences();
			retVal = preferences.getString(CssCorePreferences.PROFILE);
		}
		return retVal;
	}

	private String getString(String key) {
		return CssUIMessages.getString("CssPropertyPage." + key); //$NON-NLS-1$
	}

	private void updateProfileGroup() {
		profileGroup.setEnabled(useCustomSettings);
		for (int i = 0; i < profileButtons.length; i++) {
			profileButtons[i].setEnabled(useCustomSettings);
		}
	}

}