package org.eclipse.team.internal.ccvs.ui.actions;

/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved.
 */

import java.lang.reflect.InvocationTargetException;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.jface.action.IAction;
import org.eclipse.team.core.RepositoryProvider;
import org.eclipse.team.core.TeamException;
import org.eclipse.team.internal.ccvs.core.CVSProviderPlugin;
import org.eclipse.team.internal.ccvs.core.CVSTeamProvider;
import org.eclipse.team.internal.ccvs.core.ICVSFolder;
import org.eclipse.team.internal.ccvs.core.ICVSResource;
import org.eclipse.team.internal.ccvs.core.client.Command;
import org.eclipse.team.internal.ccvs.core.resources.CVSWorkspaceRoot;
import org.eclipse.team.internal.ccvs.core.syncinfo.ResourceSyncInfo;
import org.eclipse.team.internal.ccvs.ui.Policy;
import org.eclipse.team.internal.ui.actions.TeamAction;
import org.eclipse.ui.actions.WorkspaceModifyOperation;

/**
 * UpdateAction performs a 'cvs update' command on the selected resources.
 * If conflicts are present (file has been changed both remotely and locally),
 * the changes will be merged into the local file such that the user must
 * resolve the conflicts. This action is temporary code; it will be removed
 * when a functional synchronize view has been implemented.
 */
public class UpdateAction extends CVSAction {
	/*
	 * @see IActionDelegate#run(IAction)
	 */
	public void execute(IAction action) {
		run(new WorkspaceModifyOperation() {
			public void execute(IProgressMonitor monitor) throws InterruptedException, InvocationTargetException {
				try {					
					Hashtable table = getProviderMapping();
					Set keySet = table.keySet();
					monitor.beginTask("", keySet.size() * 1000); //$NON-NLS-1$
					monitor.setTaskName(Policy.bind("UpdateAction.updating")); //$NON-NLS-1$
					Iterator iterator = keySet.iterator();
					while (iterator.hasNext()) {
						IProgressMonitor subMonitor = new SubProgressMonitor(monitor, 1000);
						CVSTeamProvider provider = (CVSTeamProvider)iterator.next();
						List list = (List)table.get(provider);
						IResource[] providerResources = (IResource[])list.toArray(new IResource[list.size()]);
						provider.update(providerResources, Command.NO_LOCAL_OPTIONS, null, true /*createBackups*/, subMonitor);
					}
				} catch (TeamException e) {
					throw new InvocationTargetException(e);
				} finally {
					monitor.done();
				}
			}
		}, Policy.bind("UpdateAction.update"), this.PROGRESS_DIALOG); //$NON-NLS-1$

	}
	/*
	 * @see TeamAction#isEnabled()
	 */
	protected boolean isEnabled() throws TeamException {
		IResource[] resources = getSelectedResources();
		if (resources.length == 0) return false;
		for (int i = 0; i < resources.length; i++) {
			IResource resource = resources[i];
			RepositoryProvider provider = RepositoryProvider.getProvider(resource.getProject(), CVSProviderPlugin.getTypeId());
			if (provider == null) return false;
			ICVSResource cvsResource = CVSWorkspaceRoot.getCVSResourceFor(resource);
			ResourceSyncInfo info = cvsResource.getSyncInfo();
			if(cvsResource.isFolder()) {
				if(!((ICVSFolder)cvsResource).isCVSFolder()) return false;
			} else {
				if (!cvsResource.isManaged() || info.isAdded()) return false;
			}
		}
		return true;
	}
}