/**
    * Copyright 2005-2011 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.rice.edl.impl.components;
  
  import org.kuali.rice.edl.impl.EDLXmlUtils;
  import org.kuali.rice.edl.impl.RequestParser;
  import org.kuali.rice.kew.service.KEWServiceLocator;
  import org.kuali.rice.kew.util.Utilities;
  import org.kuali.rice.kew.workgroup.GroupId;
  import org.kuali.rice.kew.workgroup.GroupNameId;
  import org.kuali.rice.kim.api.group.Group;
  import org.w3c.dom.Element;
  import org.w3c.dom.NodeList;
  
  /**
   * Looks up workgroup param to validate workgroup exists and is active.  Returns error message if workgroup is does not exist or is not active.
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class WorkgroupWorkflowEDLConfigComponent extends SimpleWorkflowEDLConfigComponent {
  	
  	private boolean required = false;
  	
  	protected GroupId resolveId(String id) {
  		String groupName = Utilities.parseGroupName(id);
      	String namespace = Utilities.parseGroupNamespaceCode(id);
  		return new GroupNameId(namespace, groupName);
  	}
  	
  	@Override
  	public Element getReplacementConfigElement(Element element) {
  		Element replacementEl = (Element)element.cloneNode(true);
  		Element type = (Element)((NodeList)replacementEl.getElementsByTagName(EDLXmlUtils.TYPE_E)).item(0);
  		type.setTextContent("text");
  		
  		//find the validation element if required is true set a boolean and determine if blanks
  		//are allowed based on that
  		Element validation = (Element)((NodeList)replacementEl.getElementsByTagName(EDLXmlUtils.VALIDATION_E)).item(0);
  		if (validation != null && validation.getAttribute("required").equals("true")) {
  			required = true;
  		}
  		return replacementEl;
  	}
  	
  	@Override
  	public String getErrorMessage(Element originalConfigElement, RequestParser requestParser, MatchingParam param) {
  		
  		if (param.getParamValue().length() == 0 && required == true) {
  			//empty and required so send error
  			return ("Workgroup is a required field");
  		} else if (param.getParamValue().length() == 0 && required == false) { 
  			//empty but not required then just return 
  			return null;
  		}
  		String wrkgrpName = param.getParamValue();
  		// TODO add support for namespace here!
  		Group group = KEWServiceLocator.getIdentityHelperService().getGroup(resolveId(wrkgrpName));
  		if (group == null) {
  		    return ("Group " + wrkgrpName + " not found.");
  		}
  		if (!group.isActive()) {
  		    return ("Group " + wrkgrpName + " is not an active group.");
  		}
  		return null;
  	}
  	
  	public boolean isRequired() {
  		return required;
  	}
  
  	public void setRequired(boolean required) {
  		this.required = required;
  	}
  
  }