/*

  * 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 permissions and

  * limitations under the License.

  */

 package org.kuali.rice.kim.document.rule;

 import org.kuali.rice.core.util.AttributeSet;

 import org.kuali.rice.core.util.RiceKeyConstants;

 import org.kuali.rice.kim.api.group.Group;

 import org.kuali.rice.kim.api.services.KimApiServiceLocator;

 import org.kuali.rice.kim.api.type.KimType;

 import org.kuali.rice.kim.bo.ui.GroupDocumentMember;

 import org.kuali.rice.kim.bo.ui.GroupDocumentQualifier;

 import org.kuali.rice.kim.document.IdentityManagementGroupDocument;

 import org.kuali.rice.kim.rule.event.ui.AddGroupMemberEvent;

 import org.kuali.rice.kim.rule.ui.AddGroupMemberRule;

 import org.kuali.rice.kim.rules.ui.GroupDocumentMemberRule;

 import org.kuali.rice.kim.api.entity.services.IdentityService;

 import org.kuali.rice.kim.service.KIMServiceLocatorWeb;

 import org.kuali.rice.kim.service.support.KimTypeService;

 import org.kuali.rice.kim.util.KimConstants;

 import org.kuali.rice.kns.document.Document;

 import org.kuali.rice.kns.rules.TransactionalDocumentRuleBase;

 import org.kuali.rice.kns.service.BusinessObjectService;

 import org.kuali.rice.kns.service.KNSServiceLocator;

 import org.kuali.rice.kns.util.GlobalVariables;

 import org.kuali.rice.kns.util.KNSConstants;

 import org.kuali.rice.kns.util.MessageMap;

 import java.sql.Timestamp;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 /**

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class IdentityManagementGroupDocumentRule extends TransactionalDocumentRuleBase implements AddGroupMemberRule {

         protected AddGroupMemberRule addGroupMemberRule;

         protected AttributeValidationHelper attributeValidationHelper = new AttributeValidationHelper();

         protected BusinessObjectService businessObjectService;

         protected Class<? extends GroupDocumentMemberRule> addGroupMemberRuleClass = GroupDocumentMemberRule.class;

         protected IdentityService identityService; 

     public IdentityService getIdentityService() {

         if ( identityService == null) {

             identityService = KimApiServiceLocator.getIdentityService();

         }

         return identityService;

     }

     @Override

     protected boolean processCustomSaveDocumentBusinessRules(Document document) {

         if (!(document instanceof IdentityManagementGroupDocument))

             return false;

         IdentityManagementGroupDocument groupDoc = (IdentityManagementGroupDocument)document;

         boolean valid = true;

         GlobalVariables.getMessageMap().addToErrorPath(KNSConstants.DOCUMENT_PROPERTY_NAME);

         valid &= validAssignGroup(groupDoc);

         valid &= validDuplicateGroupName(groupDoc);

         getDictionaryValidationService().validateDocumentAndUpdatableReferencesRecursively(document, getMaxDictionaryValidationDepth(), true, false);

         valid &= validateGroupQualifier(groupDoc.getQualifiers(), groupDoc.getKimType());

         valid &= validGroupMemberActiveDates(groupDoc.getMembers());

         GlobalVariables.getMessageMap().removeFromErrorPath(KNSConstants.DOCUMENT_PROPERTY_NAME);

         return valid;

     }

         protected boolean validAssignGroup(IdentityManagementGroupDocument document){

         boolean rulePassed = true;

         Map<String,String> additionalPermissionDetails = new HashMap<String,String>();

         additionalPermissionDetails.put(KimConstants.AttributeConstants.NAMESPACE_CODE, document.getGroupNamespace());

         additionalPermissionDetails.put(KimConstants.AttributeConstants.GROUP_NAME, document.getGroupName());

                 if(document.getMembers()!=null && document.getMembers().size()>0){

                         if(!getDocumentHelperService().getDocumentAuthorizer(document).isAuthorizedByTemplate(

                                         document, KimConstants.NAMESPACE_CODE, KimConstants.PermissionTemplateNames.POPULATE_GROUP, 

                                         GlobalVariables.getUserSession().getPrincipalId(), additionalPermissionDetails, null)){

                             GlobalVariables.getMessageMap().putError("document.groupName", 

                                             RiceKeyConstants.ERROR_ASSIGN_GROUP, 

                                             new String[] {document.getGroupNamespace(), document.getGroupName()});

                     rulePassed = false;

                         }

                 }

                 return rulePassed;

         }

     @SuppressWarnings("unchecked")

         protected boolean validDuplicateGroupName(IdentityManagementGroupDocument groupDoc){

         Group group = KimApiServiceLocator.getGroupService().getGroupByName(groupDoc.getGroupNamespace(), groupDoc.getGroupName());

         boolean rulePassed = true;

             if(group!=null){

                     if(group.getId().equals(groupDoc.getGroupId()))

                             rulePassed = true;

                     else{

                             GlobalVariables.getMessageMap().putError("document.groupName", 

                                             RiceKeyConstants.ERROR_DUPLICATE_ENTRY, new String[] {"Group Name"});

                             rulePassed = false;

                     }

             }

             return rulePassed;

     }

     protected boolean validGroupMemberActiveDates(List<GroupDocumentMember> groupMembers) {

             boolean valid = true;

                 int i = 0;

             for(GroupDocumentMember groupMember: groupMembers) {

                            valid &= validateActiveDate("document.members["+i+"].activeToDate", groupMember.getActiveFromDate(), groupMember.getActiveToDate());

                     i++;

             }

             return valid;

     }

     protected boolean validateGroupQualifier(List<GroupDocumentQualifier> groupQualifiers, KimType kimType){

                 AttributeSet validationErrors = new AttributeSet();

                 AttributeSet errorsTemp;

                 AttributeSet attributeSetToValidate;

         KimTypeService kimTypeService = KIMServiceLocatorWeb.getKimTypeService(kimType);

         GlobalVariables.getMessageMap().removeFromErrorPath(KNSConstants.DOCUMENT_PROPERTY_NAME);

                 attributeSetToValidate = attributeValidationHelper.convertQualifiersToMap(groupQualifiers);

                 errorsTemp = kimTypeService.validateAttributes(kimType.getId(), attributeSetToValidate);

                 validationErrors.putAll( attributeValidationHelper.convertErrors("",attributeValidationHelper.convertQualifiersToAttrIdxMap(groupQualifiers),errorsTemp) );

                 GlobalVariables.getMessageMap().addToErrorPath(KNSConstants.DOCUMENT_PROPERTY_NAME);

             if (validationErrors.isEmpty()) {

                     return true;

             } 

             attributeValidationHelper.moveValidationErrorsToErrorMap(validationErrors);

             return false;

     }

         protected boolean validateActiveDate(String errorPath, Timestamp activeFromDate, Timestamp activeToDate) {

                 // TODO : do not have detail bus rule yet, so just check this for now.

                 boolean valid = true;

                 if (activeFromDate != null && activeToDate !=null && activeToDate.before(activeFromDate)) {

                 MessageMap errorMap = GlobalVariables.getMessageMap();

             errorMap.putError(errorPath, RiceKeyConstants.ERROR_ACTIVE_TO_DATE_BEFORE_FROM_DATE);

             valid = false;

                 }

                 return valid;

         }

         /**

          * @return the addGroupMemberRule

          */

         public AddGroupMemberRule getAddGroupMemberRule() {

                 if(addGroupMemberRule == null){

                         try {

                                 addGroupMemberRule = addGroupMemberRuleClass.newInstance();

                         } catch ( Exception ex ) {

                                 throw new RuntimeException( "Unable to create AddMemberRule instance using class: " + addGroupMemberRuleClass, ex );

                         }

                 }

                 return addGroupMemberRule;

         }

     public boolean processAddGroupMember(AddGroupMemberEvent addGroupMemberEvent) {

         return new GroupDocumentMemberRule().processAddGroupMember(addGroupMemberEvent);    

     }

     /**

          * @return the businessObjectService

          */

         public BusinessObjectService getBusinessObjectService() {

                 if(businessObjectService == null){

                         businessObjectService = KNSServiceLocator.getBusinessObjectService();

                 }

                 return businessObjectService;

         }

 }