/*******************************************************************************
 * Copyright (c) 2000, 2003 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.team.internal.ccvs.ui.model;


import java.lang.reflect.InvocationTargetException;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.team.core.TeamException;
import org.eclipse.team.internal.ccvs.core.ICVSRemoteFile;
import org.eclipse.team.internal.ccvs.core.ILogEntry;
import org.eclipse.team.internal.ccvs.ui.CVSUIPlugin;
import org.eclipse.team.internal.ccvs.ui.ICVSUIConstants;
import org.eclipse.team.internal.ccvs.ui.Policy;
import org.eclipse.ui.views.properties.IPropertyDescriptor;
import org.eclipse.ui.views.properties.IPropertySource;
import org.eclipse.ui.views.properties.PropertyDescriptor;

public class CVSRemoteFilePropertySource implements IPropertySource {
	ICVSRemoteFile file;
	ILogEntry entry;
	boolean initialized;
	
	// Property Descriptors
	static protected IPropertyDescriptor[] propertyDescriptors = new IPropertyDescriptor[5];
	{
		PropertyDescriptor descriptor;
		String category = Policy.bind("cvs"); //$NON-NLS-1$
		
		// resource name
		descriptor = new PropertyDescriptor(ICVSUIConstants.PROP_NAME, Policy.bind("CVSRemoteFilePropertySource.name")); //$NON-NLS-1$
		descriptor.setAlwaysIncompatible(true);
		descriptor.setCategory(category);
		propertyDescriptors[0] = descriptor;
		// revision
		descriptor = new PropertyDescriptor(ICVSUIConstants.PROP_REVISION, Policy.bind("CVSRemoteFilePropertySource.revision")); //$NON-NLS-1$
		descriptor.setAlwaysIncompatible(true);
		descriptor.setCategory(category);
		propertyDescriptors[1] = descriptor;
		// date
		descriptor = new PropertyDescriptor(ICVSUIConstants.PROP_DATE, Policy.bind("CVSRemoteFilePropertySource.date")); //$NON-NLS-1$
		descriptor.setAlwaysIncompatible(true);
		descriptor.setCategory(category);
		propertyDescriptors[2] = descriptor;
		// author
		descriptor = new PropertyDescriptor(ICVSUIConstants.PROP_AUTHOR, Policy.bind("CVSRemoteFilePropertySource.author")); //$NON-NLS-1$
		descriptor.setAlwaysIncompatible(true);
		descriptor.setCategory(category);
		propertyDescriptors[3] = descriptor;
		// comment
		descriptor = new PropertyDescriptor(ICVSUIConstants.PROP_COMMENT, Policy.bind("CVSRemoteFilePropertySource.comment")); //$NON-NLS-1$
		descriptor.setAlwaysIncompatible(true);
		descriptor.setCategory(category);
		propertyDescriptors[4] = descriptor;
	}

	/**
	 * Create a PropertySource and store its file
	 */
	public CVSRemoteFilePropertySource(ICVSRemoteFile file) {
		this.file = file;
	}
	
	/**
	 * Do nothing because properties are read only.
	 */
	public Object getEditableValue() {
		return this;
	}

	/**
	 * Return the Property Descriptors for the receiver.
	 */
	public IPropertyDescriptor[] getPropertyDescriptors() {
		return propertyDescriptors;
	}

	/*
	 * @see IPropertySource#getPropertyValue(Object)
	 */
	public Object getPropertyValue(Object id) {
		if (!initialized) {
			initialize();
			initialized = true;
		}
		if (id.equals(ICVSUIConstants.PROP_NAME)) {
			return file.getName();
		}
		if (entry != null) {
			if (id.equals(ICVSUIConstants.PROP_REVISION)) {
				return entry.getRevision();
			}
			if (id.equals(ICVSUIConstants.PROP_DATE)) {
				return entry.getDate();
			}
			if (id.equals(ICVSUIConstants.PROP_AUTHOR)) {
				return entry.getAuthor();
			}
			if (id.equals(ICVSUIConstants.PROP_COMMENT)) {
				return entry.getComment();
			}
		}
		return ""; //$NON-NLS-1$
	}

	/**
	 * Answer true if the value of the specified property 
	 * for this object has been changed from the default.
	 */
	public boolean isPropertySet(Object property) {
		return false;
	}
	/**
	 * Reset the specified property's value to its default value.
	 * Do nothing because properties are read only.
	 * 
	 * @param   property    The property to reset.
	 */
	public void resetPropertyValue(Object property) {
	}
	/**
	 * Do nothing because properties are read only.
	 */
	public void setPropertyValue(Object name, Object value) {
	}
	
	private void initialize() {
		try {
			CVSUIPlugin.runWithProgress(null, true /*cancelable*/, new IRunnableWithProgress() {
				public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
					try {
						ILogEntry[] entries = file.getLogEntries(monitor);
						String revision = file.getRevision();
						for (int i = 0; i < entries.length; i++) {
							if (entries[i].getRevision().equals(revision)) {
								entry = entries[i];
								return;
							}
						}
					} catch (TeamException e) {
						throw new InvocationTargetException(e);
					}
				}
			});
		} catch (InterruptedException e) { // ignore cancellation
		} catch (InvocationTargetException e) {
			CVSUIPlugin.openError(null, null, null, e);
		}
	}
}