/*******************************************************************************
 * 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 Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.team.internal.ccvs.ui.actions;

import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceVisitor;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.team.core.TeamException;
import org.eclipse.team.internal.ccvs.core.CVSException;
import org.eclipse.team.internal.ccvs.core.ICVSFolder;
import org.eclipse.team.internal.ccvs.core.ICVSResource;
import org.eclipse.team.internal.ccvs.core.ICVSRunnable;
import org.eclipse.team.internal.ccvs.core.resources.CVSWorkspaceRoot;
import org.eclipse.team.internal.ccvs.ui.CVSUIPlugin;
import org.eclipse.team.internal.ccvs.ui.Policy;
import org.eclipse.team.internal.ccvs.ui.repo.RepositoryManager;
import org.eclipse.ui.actions.WorkspaceModifyOperation;

/**
 * Action for checking in files to a CVS provider.
 * Prompts the user for a release comment.
 */
public class CommitAction extends WorkspaceAction {
	
	/*
	 * @see CVSAction#execute(IAction)
	 */
	public void execute(IAction action) throws InvocationTargetException, InterruptedException {
		final IResource[] resources = getSelectedResources();
		final RepositoryManager manager = CVSUIPlugin.getPlugin().getRepositoryManager();
		final String[] comment = new String[] {null};
		final IResource[][] resourcesToBeAdded = new IResource[][] { null };
		run(new IRunnableWithProgress() {
			public void run(IProgressMonitor monitor) throws InterruptedException, InvocationTargetException {
				try {
					// search for any non-added, non-ignored resources in the selection
					IResource[] unadded = getUnaddedResources(resources, monitor);
					resourcesToBeAdded[0] = promptForResourcesToBeAdded(manager, unadded);
					if (resourcesToBeAdded[0] == null) return;
					comment[0] = promptForComment(manager, resources);
				} catch (TeamException e) {
					throw new InvocationTargetException(e);
				}
			}
		}, true /* cancelable */, PROGRESS_BUSYCURSOR); //$NON-NLS-1$
		
		if (comment[0] == null) return;
		
		run(new WorkspaceModifyOperation() {
			public void execute(IProgressMonitor monitor) throws InterruptedException, InvocationTargetException {
				try {
					// execute the add and commit in a single CVS runnable so sync changes are batched
					CVSWorkspaceRoot.getCVSFolderFor(ResourcesPlugin.getWorkspace().getRoot()).run(
						new ICVSRunnable() {
							public void run(IProgressMonitor monitor) throws CVSException {
								try {
									int ticks=100;
									monitor.beginTask(null, ticks);
									if (resourcesToBeAdded[0].length > 0) {
										int addTicks = 20;
										manager.add(resourcesToBeAdded[0], Policy.subMonitorFor(monitor, addTicks));
										ticks-=addTicks;
									}
									IResource[] shared = getSharedResources(resources);
									if (shared.length == 0) return;
									manager.commit(shared, comment[0], Policy.subMonitorFor(monitor,ticks));
								} catch (TeamException e) {
									throw CVSException.wrapException(e);
								}
							}
						}, monitor);
				} catch (CVSException e) {
					throw new InvocationTargetException(e);
				} finally {
					monitor.done();
				}
			}
		}, true /* cancelable */, PROGRESS_DIALOG); //$NON-NLS-1$
	}

	/**
	 * Method getUnaddedResources.
	 * @param resources
	 * @param iProgressMonitor
	 * @return IResource[]
	 */
	private IResource[] getUnaddedResources(IResource[] resources, IProgressMonitor iProgressMonitor) throws CVSException {
		final List unadded = new ArrayList();
		final CVSException[] exception = new CVSException[] { null };
		for (int i = 0; i < resources.length; i++) {
			IResource resource = resources[i];
			// visit each resource deeply
			try {
				resource.accept(new IResourceVisitor() {
					public boolean visit(IResource resource) throws CoreException {
						ICVSResource cvsResource = CVSWorkspaceRoot.getCVSResourceFor(resource);
						// skip ignored resources and their children
						try {
							if (cvsResource.isIgnored())
								return false;
							// visit the children of shared resources
							if (cvsResource.isManaged())
								return true;
							if (cvsResource.isFolder() && ((ICVSFolder)cvsResource).isCVSFolder())
								return true;
						} catch (CVSException e) {
							exception[0] = e;
						}
						// don't add folders to avoid comitting empty folders
						if (resource.getType() == IResource.FOLDER)
							return true;
						// file is unshared so record it
						unadded.add(resource);
						// no need to go into children because add is deep
						return false;
					}
				});
			} catch (CoreException e) {
				throw CVSException.wrapException(e);
			}
			if (exception[0] != null) throw exception[0];
		}
		return (IResource[]) unadded.toArray(new IResource[unadded.size()]);
	}


	/*
	 * Return all resources in the provided collection that are shared with a repo
	 * @param resources
	 * @return IResource[]
	 */
	private IResource[] getSharedResources(IResource[] resources) throws CVSException {
		List shared = new ArrayList();
		for (int i = 0; i < resources.length; i++) {
			IResource resource = resources[i];
			ICVSResource cvsResource = CVSWorkspaceRoot.getCVSResourceFor(resource);
			if (cvsResource.isManaged() 
			  || (cvsResource.isFolder() && ((ICVSFolder)cvsResource).isCVSFolder())) {
			  	shared.add(resource);
			}
		}
		return (IResource[]) shared.toArray(new IResource[shared.size()]);
	}
	
	/**
	 * Prompts the user for a release comment.
	 * @return the comment, or null to cancel
	 */
	protected String promptForComment(RepositoryManager manager, IResource[] resourcesToCommit) {
		return manager.promptForComment(getShell(), resourcesToCommit);
	}
	
	private IResource[] promptForResourcesToBeAdded(RepositoryManager manager, IResource[] unadded) {
		return manager.promptForResourcesToBeAdded(getShell(), unadded);
	}
	/**
	 * @see org.eclipse.team.internal.ccvs.ui.actions.CVSAction#getErrorTitle()
	 */
	protected String getErrorTitle() {
		return Policy.bind("CommitAction.commitFailed"); //$NON-NLS-1$
	}

	/**
	 * @see org.eclipse.team.internal.ccvs.ui.actions.WorkspaceAction#isEnabledForUnmanagedResources()
	 */
	protected boolean isEnabledForUnmanagedResources() {
		return true;
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.team.internal.ccvs.ui.actions.WorkspaceAction#isEnabledForNonExistantResources()
	 */
	protected boolean isEnabledForNonExistantResources() {
		return true;
	}
}