/*
    * Copyright 2007-2009 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 responsibilitys and
   * limitations under the License.
   */
  package org.kuali.rice.kim.impl.responsibility;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.util.RiceKeyConstants;
  import org.kuali.rice.kim.api.responsibility.Responsibility;
  import org.kuali.rice.kim.bo.ui.KimDocumentRoleResponsibility;
  import org.kuali.rice.kim.document.IdentityManagementRoleDocument;
  import org.kuali.rice.kim.impl.responsibility.ResponsibilityBo;
  import org.kuali.rice.kim.util.KimConstants;
  import org.kuali.rice.krad.rules.DocumentRuleBase;
  import org.kuali.rice.krad.util.GlobalVariables;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * This is a description of what this class does - shyu don't forget to fill this in. 
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   *
   */
  public class KimDocumentResponsibilityRule extends DocumentRuleBase implements AddResponsibilityRule {
  
  	public static final String ERROR_PATH = "document.responsibility.responsibilityId";
  
  	public boolean processAddResponsibility(AddResponsibilityEvent addResponsibilityEvent) {
  		KimDocumentRoleResponsibility newResponsibility = addResponsibilityEvent.getResponsibility();
  		if(newResponsibility==null){
  			GlobalVariables.getMessageMap().putError(ERROR_PATH, RiceKeyConstants.ERROR_EMPTY_ENTRY, new String[] {"Responsibility"});
  			return false;
  		}
  
  		ResponsibilityBo kimResponsibilityImpl = newResponsibility.getKimResponsibility();
  		if(kimResponsibilityImpl==null){
  			GlobalVariables.getMessageMap().putError(ERROR_PATH, RiceKeyConstants.ERROR_EMPTY_ENTRY, new String[] {"Responsibility"});
  			return false;
  		}
  
  		IdentityManagementRoleDocument document = (IdentityManagementRoleDocument)addResponsibilityEvent.getDocument();		
  	    boolean rulePassed = true;
  		if (!hasPermissionToGrantResponsibility(ResponsibilityBo.to(kimResponsibilityImpl), document)) {
              GlobalVariables.getMessageMap().putError(ERROR_PATH, RiceKeyConstants.ERROR_ASSIGN_RESPONSIBILITY, 
              		new String[] {kimResponsibilityImpl.getNamespaceCode(), kimResponsibilityImpl.getTemplate().getName()});
              return false;
  		}
  		
  		if (newResponsibility == null || StringUtils.isBlank(newResponsibility.getResponsibilityId())) {
              rulePassed = false;
              GlobalVariables.getMessageMap().putError(ERROR_PATH, RiceKeyConstants.ERROR_EMPTY_ENTRY, new String[] {"Responsibility"});
          } else {
          	int i = 0;
  		    for (KimDocumentRoleResponsibility responsibility: document.getResponsibilities()) {
  		    	if (responsibility.getResponsibilityId().equals(newResponsibility.getResponsibilityId())) {
  		            rulePassed = false;
  		            GlobalVariables.getMessageMap().putError("document.responsibilities["+i+"].responsibilityId", RiceKeyConstants.ERROR_DUPLICATE_ENTRY, new String[] {"Responsibility"});
  		    	}
  		    	i++;
  		    }
          }
  		return rulePassed;
  	} 
  
  	public boolean hasPermissionToGrantResponsibility(Responsibility kimResponsibilityInfo, IdentityManagementRoleDocument document){
  		Map<String,String> responsibilityDetails = new HashMap<String,String>();
  		responsibilityDetails.put(KimConstants.AttributeConstants.NAMESPACE_CODE, kimResponsibilityInfo.getNamespaceCode());
  		responsibilityDetails.put(KimConstants.AttributeConstants.RESPONSIBILITY_NAME, kimResponsibilityInfo.getName());
  		if (!getDocumentHelperService().getDocumentAuthorizer(document).isAuthorizedByTemplate(
  				document, 
  				KimConstants.NAMESPACE_CODE, 
  				KimConstants.PermissionTemplateNames.GRANT_RESPONSIBILITY, 
  				GlobalVariables.getUserSession().getPerson().getPrincipalId(), 
  				responsibilityDetails, null)) {
              return false;
  		}
  		return true;
  	}
  }