/*
    * Copyright (C) 2007-2012 Argeo GmbH
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *         http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.argeo.slc.client.ui.dist.commands;
  
  import javax.jcr.Credentials;
  import javax.jcr.Node;
  import javax.jcr.Repository;
  import javax.jcr.RepositoryException;
  import javax.jcr.RepositoryFactory;
  import javax.jcr.Session;
  import javax.jcr.security.Privilege;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.argeo.eclipse.ui.dialogs.ErrorFeedback;
  import org.argeo.jcr.JcrUtils;
  import org.argeo.node.security.Keyring;
  import org.argeo.slc.SlcConstants;
  import org.argeo.slc.client.ui.dist.DistPlugin;
  import org.argeo.slc.client.ui.dist.utils.CommandHelpers;
  import org.argeo.slc.repo.RepoUtils;
  import org.eclipse.core.commands.AbstractHandler;
  import org.eclipse.core.commands.ExecutionEvent;
  import org.eclipse.core.commands.ExecutionException;
  import org.eclipse.jface.dialogs.Dialog;
  import org.eclipse.jface.dialogs.InputDialog;
  import org.eclipse.jface.resource.ImageDescriptor;
  import org.eclipse.ui.handlers.HandlerUtil;
  
  /** Create a new empty workspace in a remote repository */
  public class CreateWorkspace extends AbstractHandler {
  	private static final Log log = LogFactory.getLog(CreateWorkspace.class);
  
  	// Exposes commands meta-info
  	public final static String ID = DistPlugin.PLUGIN_ID + ".createWorkspace";
  	public final static String DEFAULT_LABEL = "Create workspace...";
  	public final static ImageDescriptor DEFAULT_ICON = DistPlugin
  			.getImageDescriptor("icons/addItem.gif");
  
  	// Parameters
  	public final static String PARAM_TARGET_REPO_PATH = "targetRepoPath";
  	public final static String PARAM_WORKSPACE_PREFIX = "workspacePrefix";
  
  	// DEPENDENCY INJECTION
  	private RepositoryFactory repositoryFactory;
  	private Keyring keyring;
  	private Repository nodeRepository;
  
  	public Object execute(ExecutionEvent event) throws ExecutionException {
  
  		String targetRepoPath = event.getParameter(PARAM_TARGET_REPO_PATH);
  		String prefix = event.getParameter(PARAM_WORKSPACE_PREFIX);
  
  		Session nodeSession = null;
  		Session session = null;
  		try {
  			nodeSession = nodeRepository.login();
  			Node repoNode = nodeSession.getNode(targetRepoPath);
  			Repository repository = RepoUtils.getRepository(repositoryFactory,
  					keyring, repoNode);
  			Credentials credentials = RepoUtils.getRepositoryCredentials(
  					keyring, repoNode);
  
  			// TODO : add an input validator
  			InputDialog inputDialog = new InputDialog(HandlerUtil
  					.getActiveWorkbenchWindow(event).getShell(),
  					"Workspace name?",
  					"Choose a name for the workspace to create",
  					prefix == null ? "" : prefix + "-", null);
  			int result = inputDialog.open();
  
  			String enteredName = inputDialog.getValue();
  
  			final String legalChars = "ABCDEFGHIJKLMNOPQRSTUVWXZY0123456789_";
  			char[] arr = enteredName.toUpperCase().toCharArray();
  			int count = 0;
  			for (int i = 0; i < arr.length; i++) {
  				if (legalChars.indexOf(arr[i]) == -1)
  					count = count + 7;
  				else
  					count++;
  			}
  
  			if (log.isTraceEnabled())
  				log.trace("Translated workspace name length: " + count
  						+ " (name: " + enteredName + " )");
 
 			if (count > 60) {
 				ErrorFeedback.show("Workspace name '" + enteredName
 						+ "' is too long or contains"
 						+ " too many special characters such as '.' or '-'.");
 				return null;
 			}
 
 			String workspaceName = enteredName;
 
 			// Canceled by user
 			if (result == Dialog.CANCEL || workspaceName == null
 					|| "".equals(workspaceName.trim()))
 				return null;
 
 			session = repository.login(credentials);
 			session.getWorkspace().createWorkspace(workspaceName);
 			JcrUtils.logoutQuietly(session);
 			// init new workspace
 			session = repository.login(credentials, workspaceName);
 			JcrUtils.addPrivilege(session, "/", SlcConstants.ROLE_SLC,
 					Privilege.JCR_ALL);
 			CommandHelpers.callCommand(RefreshDistributionsView.ID);
 			if (log.isTraceEnabled())
 				log.trace("WORKSPACE " + workspaceName + " CREATED");
 
 		} catch (RepositoryException re) {
 			ErrorFeedback.show(
 					"Unexpected error while creating the new workspace.", re);
 		} finally {
 			JcrUtils.logoutQuietly(session);
 			JcrUtils.logoutQuietly(nodeSession);
 		}
 		return null;
 	}
 
 	/* DEPENDENCY INJECTION */
 	public void setNodeRepository(Repository nodeRepository) {
 		this.nodeRepository = nodeRepository;
 	}
 
 	public void setRepositoryFactory(RepositoryFactory repositoryFactory) {
 		this.repositoryFactory = repositoryFactory;
 	}
 
 	public void setKeyring(Keyring keyring) {
 		this.keyring = keyring;
 	}
 }