/*

  * Copyright 2011 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 1.0 (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/ecl1.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.student.enrollment.class2.registration.controller;

 import org.apache.commons.collections.CollectionUtils;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.core.api.resourceloader.GlobalResourceLoader;

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

 import org.kuali.rice.krad.uif.UifParameters;

 import org.kuali.rice.krad.uif.util.ObjectPropertyUtils;

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

 import org.kuali.rice.krad.util.KRADConstants;

 import org.kuali.rice.krad.web.controller.UifControllerBase;

 import org.kuali.rice.krad.web.form.UifFormBase;

 import org.kuali.student.core.statement.dto.StatementTreeViewInfo;

 import org.kuali.student.core.statement.service.StatementService;

 import org.kuali.student.enrollment.class2.registration.dto.ActivityOfferingWrapper;

 import org.kuali.student.enrollment.class2.registration.dto.CourseOfferingWrapper;

 import org.kuali.student.enrollment.class2.registration.dto.MeetingScheduleWrapper;

 import org.kuali.student.enrollment.class2.registration.dto.RegistrationGroupWrapper;

 import org.kuali.student.enrollment.class2.registration.form.RegistrationForm;

 import org.kuali.student.enrollment.courseoffering.dto.ActivityOfferingInfo;

 import org.kuali.student.enrollment.courseoffering.dto.CourseOfferingInfo;

 import org.kuali.student.enrollment.courseoffering.dto.RegistrationGroupInfo;

 import org.kuali.student.enrollment.courseoffering.infc.RegistrationGroup;

 import org.kuali.student.enrollment.courseoffering.service.CourseOfferingService;

 import org.kuali.student.enrollment.courseregistration.dto.CourseRegistrationInfo;

 import org.kuali.student.enrollment.courseregistration.dto.RegRequestInfo;

 import org.kuali.student.enrollment.courseregistration.dto.RegRequestItemInfo;

 import org.kuali.student.enrollment.courseregistration.dto.RegResponseInfo;

 import org.kuali.student.enrollment.courseregistration.infc.RegRequest;

 import org.kuali.student.enrollment.courseregistration.infc.RegRequestItem;

 import org.kuali.student.enrollment.courseregistration.service.CourseRegistrationService;

 import org.kuali.student.lum.course.service.CourseService;

 import org.kuali.student.lum.course.service.CourseServiceConstants;

 import org.kuali.student.r2.common.dto.ContextInfo;

 import org.kuali.student.r2.common.dto.MeetingScheduleInfo;

 import org.kuali.student.r2.common.dto.ValidationResultInfo;

 import org.kuali.student.r2.common.exceptions.*;

 import org.kuali.student.r2.common.infc.Context;

 import org.kuali.student.r2.common.util.constants.LuiPersonRelationServiceConstants;

 import org.springframework.stereotype.Controller;

 import org.springframework.validation.BindingResult;

 import org.springframework.web.bind.annotation.ModelAttribute;

 import org.springframework.web.bind.annotation.RequestMapping;

 import org.springframework.web.bind.annotation.RequestMethod;

 import org.springframework.web.servlet.ModelAndView;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import javax.xml.namespace.QName;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.Iterator;

 import java.util.List;

 @Controller

 @RequestMapping(value = "/registration")

 public class RegistrationController extends UifControllerBase {

     private transient CourseOfferingService courseOfferingService;

     private transient StatementService statementService;

     private transient CourseService courseService;

     private transient CourseRegistrationService courseRegistrationService;

     protected UifFormBase createInitialForm(HttpServletRequest httpServletRequest) {

             return new RegistrationForm();

     }

     protected RegRequestInfo generateNewRegRequestInfo(ContextInfo context, RegistrationForm regForm){

         String id = context.getPrincipalId();

         RegRequestInfo info = new RegRequestInfo();

         info.setTermId(regForm.getTermId());

         info.setStateKey(LuiPersonRelationServiceConstants.LPRTRANS_ITEM_NEW_STATE_KEY);

         info.setTypeKey(LuiPersonRelationServiceConstants.LPRTRANS_REGISTER_TYPE_KEY);

         info.setRequestorId(id);

         info.setRegRequestItems(new ArrayList<RegRequestItemInfo>());

         return info;

     }

     protected RegRequestItemInfo generateRegRequestItem(RegistrationGroupWrapper regGroupWrapper, Context context){

         RegRequestItemInfo regRequestItem = new RegRequestItemInfo();

         regRequestItem.setTypeKey(LuiPersonRelationServiceConstants.LPRTRANS_ITEM_ADD_TYPE_KEY);

         regRequestItem.setStateKey(LuiPersonRelationServiceConstants.LPRTRANS_ITEM_NEW_STATE_KEY);

         regRequestItem.setStudentId(context.getPrincipalId());

         regRequestItem.setNewRegGroupId(regGroupWrapper.getRegistrationGroup().getId());

         regRequestItem.setCreditOptionKey("kuali.credit.option.RVG1");

         regRequestItem.setGradingOptionKey("kuali.grading.option.RVG1");

         regRequestItem.setName(regGroupWrapper.getRegistrationGroup().getName());

         regRequestItem.setOkToHoldList(false);

         regRequestItem.setOkToWaitlist(regGroupWrapper.getRegistrationGroup().getHasWaitlist());

         return regRequestItem;

     }

     protected RegRequestItemInfo generateDropRegRequestItem(RegistrationGroupWrapper regGroupWrapper, Context context){

         RegRequestItemInfo regRequestItem = new RegRequestItemInfo();

         regRequestItem.setTypeKey(LuiPersonRelationServiceConstants.LPRTRANS_ITEM_DROP_TYPE_KEY);

         regRequestItem.setStateKey(LuiPersonRelationServiceConstants.LPRTRANS_ITEM_NEW_STATE_KEY);

         regRequestItem.setStudentId(context.getPrincipalId());

         regRequestItem.setExistingRegGroupId(regGroupWrapper.getRegistrationGroup().getId());

         regRequestItem.setCreditOptionKey("kuali.credit.option.RVG1");

         regRequestItem.setGradingOptionKey("kuali.grading.option.RVG1");

         regRequestItem.setName(regGroupWrapper.getRegistrationGroup().getName());

         regRequestItem.setOkToHoldList(false);

         regRequestItem.setOkToWaitlist(regGroupWrapper.getRegistrationGroup().getHasWaitlist());

         return regRequestItem;

     }

     protected RegistrationGroupWrapper findRegGroupByIndex(RegistrationForm registrationForm){

         // Code copied roughly from UifControllerBase.deleteLine() method

         String selectedCollectionPath = registrationForm.getActionParamaterValue(UifParameters.SELLECTED_COLLECTION_PATH);

         if (StringUtils.isBlank(selectedCollectionPath)) {

             throw new RuntimeException("Selected collection was not set for registration line action, cannot register line");

         }

         int selectedLineIndex = -1;

         String selectedLine = registrationForm.getActionParamaterValue(UifParameters.SELECTED_LINE_INDEX);

         if (StringUtils.isNotBlank(selectedLine)) {

             selectedLineIndex = Integer.parseInt(selectedLine);

         }

         if (selectedLineIndex == -1) {

             throw new RuntimeException("Selected line index was not set for registration line action, cannot register line");

         }

         // get the collection instance for adding the new line

         Collection<Object> collection = ObjectPropertyUtils.getPropertyValue(registrationForm, selectedCollectionPath);

         if (collection == null) {

             throw new RuntimeException("Unable to get registration group collection property from RegistrationForm for path: " + selectedCollectionPath);

         }

         if (collection instanceof List) {

             return (RegistrationGroupWrapper) ((List<Object>) collection).get(selectedLineIndex);

         }

         else {

             throw new RuntimeException("Only List collection implementations are supported for findRegGroup by index method");

         }

     }

     protected List<CourseRegistrationInfo> getCourseRegistrations(String studentId, String termKey, ContextInfo context) throws InvalidParameterException, MissingParameterException, DisabledIdentifierException, DoesNotExistException, PermissionDeniedException, OperationFailedException {

         if (getCourseRegistrationService() != null) {

             return getCourseRegistrationService().getCourseRegistrationsForStudentByTerm(studentId, termKey, context);

         }

         return new ArrayList<CourseRegistrationInfo>();                                    }

     /**

      * Initial method called when requesting a new view instance which forwards

      * the view for rendering

      */

     @RequestMapping(method = RequestMethod.POST, params = "methodToCall=showRegistration")

     public ModelAndView showRegistration(@ModelAttribute("KualiForm") UifFormBase formBase, BindingResult result,

                               HttpServletRequest request, HttpServletResponse response) {

         ContextInfo context = new ContextInfo();

         RegistrationForm regForm = (RegistrationForm) formBase;

         try {

             regForm.setCourseRegistrations(getCourseRegistrations(context.getPrincipalId(), regForm.getTermId(), context));

             //Pull any existing 'new' cart out

             List<String> states = new ArrayList<String>();

             states.add(LuiPersonRelationServiceConstants.LPRTRANS_NEW_STATE_KEY);

             List<RegRequestInfo> regRequestInfos = getCourseRegistrationService().getRegRequestsForStudentByTerm(context.getPrincipalId(), regForm.getTermId(), states, context);

             RegRequestInfo regRequest = null;

             if(regRequestInfos != null){

                 for(RegRequestInfo info: regRequestInfos){

                     if(regRequest != null && regRequest.getMeta().getCreateTime().before(info.getMeta().getCreateTime())){

                         regRequest = info;

                     }

                     else if(regRequest == null){

                         regRequest = info;

                     }

                 }

             }

             regForm.setRegRequest(regRequest);

             if(regRequest != null && regRequest.getRegRequestItems() != null){

                 for(RegRequestItemInfo item: regRequest.getRegRequestItems()){

                     if(StringUtils.isNotBlank(item.getNewRegGroupId())){

                         RegistrationGroupInfo regGroup = getCourseOfferingService().getRegistrationGroup(item.getNewRegGroupId(), context);

                         CourseOfferingInfo courseOffering = getCourseOfferingService().getCourseOffering(regGroup.getCourseOfferingId(), context);

                         RegistrationGroupWrapper registrationGroupWrapper = new RegistrationGroupWrapper();

                         registrationGroupWrapper.setRegistrationGroup(regGroup);

                         registrationGroupWrapper.setCourseOffering(courseOffering);

                         registrationGroupWrapper.setActivityOfferingWrappers(getActivityOfferingInfos(regGroup, courseOffering, context));

                         regForm.getRegistrationGroupWrappersById().put(registrationGroupWrapper.getRegistrationGroup().getId(), registrationGroupWrapper);

                     }

                     if(StringUtils.isNotBlank(item.getExistingRegGroupId())){

                         RegistrationGroupInfo regGroup = getCourseOfferingService().getRegistrationGroup(item.getExistingRegGroupId(), context);

                         CourseOfferingInfo courseOffering = getCourseOfferingService().getCourseOffering(regGroup.getCourseOfferingId(), context);

                         RegistrationGroupWrapper registrationGroupWrapper = new RegistrationGroupWrapper();

                         registrationGroupWrapper.setRegistrationGroup(regGroup);

                         registrationGroupWrapper.setCourseOffering(courseOffering);

                         registrationGroupWrapper.setActivityOfferingWrappers(getActivityOfferingInfos(regGroup, courseOffering, context));

                         regForm.getRegistrationGroupWrappersById().put(registrationGroupWrapper.getRegistrationGroup().getId(), registrationGroupWrapper);

                     }

                 }

             }

 //            return getUIFModelAndView(regForm, regForm.getViewId(), "registrationPage");

             return getUIFModelAndView(regForm, "registrationPage");

         } catch (InvalidParameterException e) {

             throw new RuntimeException(e);

         } catch (MissingParameterException e) {

             throw new RuntimeException(e);

         } catch (OperationFailedException e) {

             throw new RuntimeException(e);

         } catch (PermissionDeniedException e) {

             throw new RuntimeException(e);

         } catch (DisabledIdentifierException e) {

             throw new RuntimeException(e);

         } catch (DoesNotExistException e) {

             throw new RuntimeException(e);

         }

     }

     /**

      * Method used to search for course offerings based on criteria entered

      */

     @RequestMapping(params = "methodToCall=searchCourseOfferings")

     public ModelAndView searchCourseOfferings(@ModelAttribute("KualiForm") RegistrationForm registrationForm, BindingResult result,

                                               HttpServletRequest request, HttpServletResponse response) {

         ContextInfo context = new ContextInfo();

         try {

             List<String> courseOfferingIds = getCourseOfferingIds(registrationForm, context);

             registrationForm.setCourseOfferingWrappers(new ArrayList<CourseOfferingWrapper>(courseOfferingIds.size()));

             for (String coId : courseOfferingIds) {

                 CourseOfferingWrapper courseOfferingWrapper = new CourseOfferingWrapper();

                 String prereq = "none";

                 courseOfferingWrapper.setCourseOffering(getCourseOfferingService().getCourseOffering(coId, context));

 //    TODO statement service wasnt working correctly when tested, commented out for now

                 List<StatementTreeViewInfo> statements = getCourseService().getCourseStatements(courseOfferingWrapper.getCourseOffering().getCourseId(),"KUALI.RULE", "en");

                 if(statements != null && !statements.isEmpty()){

                     for(StatementTreeViewInfo statement: statements){

                         if(statement.getType().equals("kuali.statement.type.course.academicReadiness.studentEligibilityPrereq")){

                             prereq = getStatementService().getNaturalLanguageForStatement(statement.getId(),"KUALI.RULE","en");

                             break;

                         }

                     }

                 }

                 courseOfferingWrapper.setPrereq(prereq);

                 List<RegistrationGroupInfo> regGroups = getRegistrationGroupInfos(coId, context);

                 List<RegistrationGroupWrapper> registrationGroupWrappers = new ArrayList<RegistrationGroupWrapper>(regGroups.size());

                 for (RegistrationGroupInfo regGroup : regGroups) {

                     RegistrationGroupWrapper registrationGroupWrapper = new RegistrationGroupWrapper();

                     registrationGroupWrapper.setRegistrationGroup(regGroup);

                     registrationGroupWrapper.setCourseOffering(courseOfferingWrapper.getCourseOffering());

                     registrationGroupWrapper.setActivityOfferingWrappers(getActivityOfferingInfos(regGroup, courseOfferingWrapper.getCourseOffering(), context));

                     registrationGroupWrappers.add(registrationGroupWrapper);

                 }

                 courseOfferingWrapper.setRegistrationGroupWrappers(registrationGroupWrappers);

                 registrationForm.getCourseOfferingWrappers().add(courseOfferingWrapper);

             }

         } catch (DoesNotExistException e) {

             throw new RuntimeException(e);

         } catch (InvalidParameterException e) {

             throw new RuntimeException(e);

         } catch (MissingParameterException e) {

             throw new RuntimeException(e);

         } catch (OperationFailedException e) {

             throw new RuntimeException(e);

         } catch (PermissionDeniedException e) {

             throw new RuntimeException(e);

         } catch (Exception e) {

             throw new RuntimeException(e);

         }

         return getUIFModelAndView(registrationForm);

     }

     protected List<String> getCourseOfferingIds(RegistrationForm registrationForm, ContextInfo context) throws InvalidParameterException, MissingParameterException, DoesNotExistException, PermissionDeniedException, OperationFailedException {

         // if the coures offering code is not blank... assume the value in the selectbox is inconsequential

         if (StringUtils.isNotBlank(registrationForm.getCourseOfferingCode())) {

             GlobalVariables.getMessageMap().putError(KRADConstants.GLOBAL_ERRORS, RiceKeyConstants.ERROR_CUSTOM, "Searching by Course Offering Code is not yet implemented");

             return new ArrayList<String>();

         } else {

             return getCourseOfferingService().getCourseOfferingIdsByTermAndSubjectArea(registrationForm.getTermId(), registrationForm.getSubjectArea(), context);

         }

     }

     protected List<RegistrationGroupInfo> getRegistrationGroupInfos(String coId, ContextInfo context) throws InvalidParameterException, MissingParameterException, DoesNotExistException, PermissionDeniedException, OperationFailedException {

         return getCourseOfferingService().getRegistrationGroupsForCourseOffering(coId, context);

     }

     protected List<ActivityOfferingWrapper> getActivityOfferingInfos(RegistrationGroup regGroup, CourseOfferingInfo courseOfferingInfo, ContextInfo context) throws InvalidParameterException, MissingParameterException, DoesNotExistException, PermissionDeniedException, OperationFailedException {

         // TODO right now getOfferingsByIds throws a not supported exception

 //        return getCourseOfferingService().getActivityOfferingsByIds(regGroup.getActivityOfferingIds(), context);

         List<ActivityOfferingWrapper> activityOfferingWrappers = new ArrayList<ActivityOfferingWrapper>(regGroup.getActivityOfferingIds().size());

         for (String activityId : regGroup.getActivityOfferingIds()) {

             ActivityOfferingInfo activityOfferingInfo = getCourseOfferingService().getActivityOffering(activityId, context);

             ActivityOfferingWrapper wrapper = new ActivityOfferingWrapper();

             wrapper.setActivityOffering(activityOfferingInfo);

             wrapper.setMeetingScheduleWrappers(setupMeetingScheduleInfos(courseOfferingInfo, activityOfferingInfo));

             activityOfferingWrappers.add(wrapper);

         }

         //generate js object that represents the times of the entire reg group

         StringBuilder builder = new StringBuilder();

         for (ActivityOfferingWrapper a : activityOfferingWrappers) {

             for (MeetingScheduleWrapper m : a.getMeetingScheduleWrappers()) {

                 if (StringUtils.isNotBlank(builder.toString())) {

                     builder.append(",");

                 }

                 builder.append(m.getJsScheduleObject());

             }

         }

         String times = "[" + builder.toString() + "]";

         for (ActivityOfferingWrapper a : activityOfferingWrappers) {

             for (MeetingScheduleWrapper m : a.getMeetingScheduleWrappers()) {

                 m.setRegGroupTimesJsObject(times);

             }

         }

         return activityOfferingWrappers;

     }

     protected List<MeetingScheduleWrapper> setupMeetingScheduleInfos(CourseOfferingInfo courseOfferingInfo, ActivityOfferingInfo activityOfferingInfo) {

         List<MeetingScheduleWrapper> wrappers = new ArrayList<MeetingScheduleWrapper>();

         // TODO: fix this to get the meeting schedule from the schedule Id and the schedule service

         List<MeetingScheduleInfo> list = new ArrayList<MeetingScheduleInfo> ();        

         for (MeetingScheduleInfo meetingScheduleInfo : list) {

             MeetingScheduleWrapper wrapper = new MeetingScheduleWrapper(meetingScheduleInfo);

             wrapper.setCourseTitle(courseOfferingInfo.getCourseOfferingTitle());

             wrapper.setCourseOfferingCode(courseOfferingInfo.getCourseOfferingCode());

             wrappers.add(wrapper);

         }

         return wrappers;

     }

         @RequestMapping(params = "methodToCall=dropClass")

     public ModelAndView dropClass(@ModelAttribute("KualiForm") RegistrationForm registrationForm, BindingResult result,

                                            HttpServletRequest request, HttpServletResponse response) {

         ContextInfo context = new ContextInfo();

         RegistrationGroupWrapper regGroupWrapper = findRegGroupByIndex(registrationForm);

         try {

             RegRequestInfo regRequest = generateNewRegRequestInfo(context, registrationForm);

             RegRequestItemInfo regRequestItem = generateDropRegRequestItem(regGroupWrapper, context);

             regRequest.getRegRequestItems().add(regRequestItem);

             List<ValidationResultInfo> validationResultInfos = getCourseRegistrationService().validateRegRequest(regRequest, context);

             if (CollectionUtils.isEmpty(validationResultInfos)) {

                 regRequest = getCourseRegistrationService().createRegRequest(regRequest, context);

                 registrationForm.getRegistrationGroupWrappersById().put(regGroupWrapper.getRegistrationGroup().getId(), regGroupWrapper);

             } else {

                 StringBuilder builder = new StringBuilder("Found multiple ValidationResultInfo objects after Registration Request validation:\n");

                 for (ValidationResultInfo resultInfo : validationResultInfos) {

                     builder.append(resultInfo.getMessage()).append("\n");

                 }

                 throw new RuntimeException(builder.toString());

             }

             //immediately submit the regRequest that was just created

             processSubmitRegRequest(regRequest, registrationForm, true);

         } catch (InvalidParameterException e) {

             throw new RuntimeException(e);

         } catch (DataValidationErrorException e) {

             throw new RuntimeException(e);

         } catch (PermissionDeniedException e) {

             throw new RuntimeException(e);

         } catch (OperationFailedException e) {

             throw new RuntimeException(e);

         } catch (MissingParameterException e) {

             throw new RuntimeException(e);

         } catch (AlreadyExistsException e) {

             throw new RuntimeException(e);

         }

         return getUIFModelAndView(registrationForm);

     }

     @RequestMapping(params = "methodToCall=registerClass")

     public ModelAndView registerClass(@ModelAttribute("KualiForm") RegistrationForm registrationForm, BindingResult result,

                                            HttpServletRequest request, HttpServletResponse response) {

         ContextInfo context = new ContextInfo();

         RegistrationGroupWrapper regGroupWrapper = findRegGroupByIndex(registrationForm);

         try {

             RegRequestInfo regRequest = generateNewRegRequestInfo(context, registrationForm);

             RegRequestItemInfo regRequestItem = generateRegRequestItem(regGroupWrapper, context);

             regRequest.getRegRequestItems().add(regRequestItem);

             List<ValidationResultInfo> validationResultInfos = getCourseRegistrationService().validateRegRequest(regRequest, context);

             if (CollectionUtils.isEmpty(validationResultInfos)) {

                 regRequest = getCourseRegistrationService().createRegRequest(regRequest, context);

                 registrationForm.getRegistrationGroupWrappersById().put(regGroupWrapper.getRegistrationGroup().getId(), regGroupWrapper);

             } else {

                 StringBuilder builder = new StringBuilder("Found multiple ValidationResultInfo objects after Registration Request validation:\n");

                 for (ValidationResultInfo resultInfo : validationResultInfos) {

                     builder.append(resultInfo.getMessage()).append("\n");

                 }

                 throw new RuntimeException(builder.toString());

             }

             //immediately submit the regRequest that was just created

             processSubmitRegRequest(regRequest, registrationForm, true);

         } catch (InvalidParameterException e) {

             throw new RuntimeException(e);

         } catch (DataValidationErrorException e) {

             throw new RuntimeException(e);

         } catch (PermissionDeniedException e) {

             throw new RuntimeException(e);

         } catch (OperationFailedException e) {

             throw new RuntimeException(e);

         } catch (MissingParameterException e) {

             throw new RuntimeException(e);

         } catch (AlreadyExistsException e) {

             throw new RuntimeException(e);

         }

         return getUIFModelAndView(registrationForm);

     }

     @RequestMapping(params = "methodToCall=submitRegistration")

     public ModelAndView submitRegistration(@ModelAttribute("KualiForm") RegistrationForm registrationForm, BindingResult result,

                                            HttpServletRequest request, HttpServletResponse response) {

         processSubmitRegRequest(registrationForm.getRegRequest(), registrationForm, false);

         return getUIFModelAndView(registrationForm);

     }

     protected void processSubmitRegRequest(RegRequestInfo regRequest, RegistrationForm registrationForm, boolean oneClick){

        ContextInfo context = new ContextInfo();

         try {

             List<ValidationResultInfo> validationResultInfos = getCourseRegistrationService().validateRegRequest(regRequest, context);

             if (CollectionUtils.isEmpty(validationResultInfos)) {

                 //RegRequestInfo regRequest = saveRegRequest(registrationForm.getRegRequest(), context);

                 RegResponseInfo regResponse = getCourseRegistrationService().submitRegRequest(regRequest.getId(), context);

                 if(regResponse.getOperationStatus().getStatus().equalsIgnoreCase("SUCCESS")){

                     GlobalVariables.getMessageMap().putInfo("GLOBAL_INFO", "enroll.registrationSuccessful");

                     //TODO check this logic

                     //Assuming registration successful if no errors returned

                     if(!oneClick){

                         registrationForm.setRegRequest(null);

                     }

                     registrationForm.setCourseRegistrations(getCourseRegistrations(context.getPrincipalId(), registrationForm.getTermId(), context));

                 }

                 else {

                     if(regResponse.getOperationStatus().getErrors().isEmpty()) {

                         GlobalVariables.getMessageMap().putError("GLOBAL_ERRORS", "enroll.registrationUnsuccessful");

                     }

                 }

                 if(!regResponse.getOperationStatus().getErrors().isEmpty()){

                     for(String message: regResponse.getOperationStatus().getErrors()){

                         GlobalVariables.getMessageMap().putError("GLOBAL_ERRORS", "error.enroll.requirementsNotMet", message);

                     }

                 }

                 if(!regResponse.getOperationStatus().getWarnings().isEmpty()){

                     for(String message: regResponse.getOperationStatus().getWarnings()){

                         GlobalVariables.getMessageMap().putWarning("GLOBAL_WARNINGS", message);

                     }

                 }

                 if(!regResponse.getOperationStatus().getMessages().isEmpty()){

                     for(String message: regResponse.getOperationStatus().getMessages()){

                         GlobalVariables.getMessageMap().putInfo("GLOBAL_INFO", message);

                     }

                 }

             } else {

                 GlobalVariables.getMessageMap().putError("GLOBAL_ERRORS", "enroll.registrationUnsuccessful");

                 StringBuilder builder = new StringBuilder("Found multiple ValidationResultInfo objects after Registration Request validation:\n");

                 for (ValidationResultInfo resultInfo : validationResultInfos) {

                     builder.append(resultInfo.getMessage()).append("\n");

                 }

                 throw new RuntimeException(builder.toString());

             }

         } catch (DataValidationErrorException e) {

             throw new RuntimeException(e);

         } catch (DoesNotExistException e) {

             throw new RuntimeException(e);

         } catch (InvalidParameterException e) {

             throw new RuntimeException(e);

         } catch (MissingParameterException e) {

             throw new RuntimeException(e);

         } catch (OperationFailedException e) {

             throw new RuntimeException(e);

         } catch (PermissionDeniedException e) {

             throw new RuntimeException(e);

         } catch (AlreadyExistsException e) {

             throw new RuntimeException(e);

         } catch (DisabledIdentifierException e) {

             throw new RuntimeException(e);

         }

     }

     /**

      * After the document is loaded calls method to setup the maintenance object

      */

     @RequestMapping(params = "methodToCall=removeFromCart")

     public ModelAndView removeFromCart(@ModelAttribute("KualiForm") RegistrationForm registrationForm, BindingResult result,

                                       HttpServletRequest request, HttpServletResponse response) {

         ContextInfo context = new ContextInfo();

         RegRequest regRequest = registrationForm.getRegRequest();

         String id = registrationForm.getActionParamaterValue("itemId");

         String regGroupId = "";

         //Must be being called from course list if blank

         if(StringUtils.isBlank(id)){

             RegistrationGroupWrapper regGroupWrapper = findRegGroupByIndex(registrationForm);

             regGroupId = regGroupWrapper.getRegistrationGroup().getId();

         }

         if(regRequest != null){

             List<? extends RegRequestItem> items = regRequest.getRegRequestItems();

             if(items != null && !items.isEmpty()){

                 Iterator<? extends RegRequestItem> it = items.iterator();

                 while(it.hasNext()){

                     RegRequestItem item = it.next();

                     if(StringUtils.isNotBlank(id) && item.getId().equals(id)){

                         it.remove();

                         break;

                     }

                     else if(StringUtils.isNotBlank(regGroupId) && StringUtils.isNotBlank(item.getNewRegGroupId())

                         && item.getNewRegGroupId().equals(regGroupId)){

                         it.remove();

                         break;

                 }

             }

         }

         }

         try {

             List<ValidationResultInfo> validationResultInfos = getCourseRegistrationService().validateRegRequest(registrationForm.getRegRequest(), context);

             if (CollectionUtils.isEmpty(validationResultInfos)) {

                 RegRequestInfo regRequestInfo = getCourseRegistrationService().updateRegRequest(registrationForm.getRegRequest().getId(), registrationForm.getRegRequest(), context);

                 registrationForm.setRegRequest(getCourseRegistrationService().getRegRequest(regRequestInfo.getId(),context));

             } else {

                 StringBuilder builder = new StringBuilder("Found multiple ValidationResultInfo objects after Registration Request validation:\n");

                 for (ValidationResultInfo resultInfo : validationResultInfos) {

                     builder.append(resultInfo.getMessage()).append("\n");

                 }

                 throw new RuntimeException(builder.toString());

             }

         } catch (InvalidParameterException e) {

             throw new RuntimeException(e);

         } catch (DoesNotExistException e) {

             throw new RuntimeException(e);

         } catch (DataValidationErrorException e) {

             throw new RuntimeException(e);

         } catch (PermissionDeniedException e) {

             throw new RuntimeException(e);

         } catch (VersionMismatchException e) {

             throw new RuntimeException(e);

         } catch (OperationFailedException e) {

             throw new RuntimeException(e);

         } catch (MissingParameterException e) {

             throw new RuntimeException(e);

         }

         return getUIFModelAndView(registrationForm);

     }

     /**

      * After the document is loaded calls method to setup the maintenance object

      */

     @RequestMapping(params = "methodToCall=addToCart")

     public ModelAndView addToCart(@ModelAttribute("KualiForm") RegistrationForm registrationForm, BindingResult result,

                                       HttpServletRequest request, HttpServletResponse response) {

         ContextInfo context = new ContextInfo();

         RegistrationGroupWrapper regGroupWrapper = findRegGroupByIndex(registrationForm);

         try {

             //Create if no reg request or if there is a reg request with an id yet for the Cart

             if (registrationForm.getRegRequest() == null ||

                     (registrationForm.getRegRequest() != null && StringUtils.isBlank(registrationForm.getRegRequest().getId()))) {

                 RegRequestInfo regRequest = generateNewRegRequestInfo(context, registrationForm);

                 registrationForm.setRegRequest(regRequest);

             }

             RegRequestItemInfo regRequestItem = generateRegRequestItem(regGroupWrapper, context);

             registrationForm.getRegRequest().getRegRequestItems().add(regRequestItem);

             List<ValidationResultInfo> validationResultInfos = getCourseRegistrationService().validateRegRequest(registrationForm.getRegRequest(), context);

             if (CollectionUtils.isEmpty(validationResultInfos)) {

                 if (StringUtils.isBlank(registrationForm.getRegRequest().getId())) {

                     RegRequestInfo regRequestInfo = getCourseRegistrationService().createRegRequest(registrationForm.getRegRequest(), context);

                     regRequestInfo = getCourseRegistrationService().getRegRequest(regRequestInfo.getId(),context);

                     registrationForm.setRegRequest(regRequestInfo);

                 } else {

                     getCourseRegistrationService().updateRegRequest(registrationForm.getRegRequest().getId(), registrationForm.getRegRequest(), context);

                     RegRequestInfo regRequestInfo = getCourseRegistrationService().getRegRequest(registrationForm.getRegRequest().getId(),context);

                     registrationForm.setRegRequest(regRequestInfo);

                 }

                 registrationForm.getRegistrationGroupWrappersById().put(regGroupWrapper.getRegistrationGroup().getId(), regGroupWrapper);

             } else {

                 StringBuilder builder = new StringBuilder("Found multiple ValidationResultInfo objects after Registration Request validation:\n");

                 for (ValidationResultInfo resultInfo : validationResultInfos) {

                     builder.append(resultInfo.getMessage()).append("\n");

                 }

                 throw new RuntimeException(builder.toString());

             }

         } catch (InvalidParameterException e) {

             throw new RuntimeException(e);

         } catch (DoesNotExistException e) {

             throw new RuntimeException(e);

         } catch (DataValidationErrorException e) {

             throw new RuntimeException(e);

         } catch (PermissionDeniedException e) {

             throw new RuntimeException(e);

         } catch (VersionMismatchException e) {

             throw new RuntimeException(e);

         } catch (OperationFailedException e) {

             throw new RuntimeException(e);

         } catch (MissingParameterException e) {

             throw new RuntimeException(e);

         } catch (AlreadyExistsException e) {

             throw new RuntimeException(e);

         }

         return getUIFModelAndView(registrationForm);

     }

     protected void processValidationResults(List<ValidationResultInfo> validationResultInfos, String operation) {

         GlobalVariables.getMessageMap().putError(KRADConstants.GLOBAL_ERRORS, RiceKeyConstants.ERROR_CUSTOM, "Found errors while trying to " + operation);

         for (ValidationResultInfo resultInfo : validationResultInfos) {

             GlobalVariables.getMessageMap().putError(KRADConstants.GLOBAL_ERRORS, RiceKeyConstants.ERROR_CUSTOM, resultInfo.getMessage());

         }

     }

     protected CourseOfferingService getCourseOfferingService() {

         if (courseOfferingService == null) {

             courseOfferingService = (CourseOfferingService) GlobalResourceLoader.getService(new QName("http://student.kuali.org/wsdl/courseOffering", "CourseOfferingService"));

         }

         return courseOfferingService;

     }

     protected CourseRegistrationService getCourseRegistrationService() {

         if (courseRegistrationService == null) {

              courseRegistrationService = (CourseRegistrationService) GlobalResourceLoader.getService(new QName("http://student.kuali.org/wsdl/courseRegistrationService", "CourseRegistrationService"));

         }

         return courseRegistrationService;

     }

     protected StatementService getStatementService() {

         if (statementService == null) {

              statementService = (StatementService) GlobalResourceLoader.getService(new QName("http://student.kuali.org/wsdl/statement", "StatementService"));

         }

         return statementService;

     }

     protected CourseService getCourseService() {

         if (courseService == null) {

             courseService = (CourseService) GlobalResourceLoader.getService(new QName(CourseServiceConstants.COURSE_NAMESPACE, "CourseService"));

         }

         return courseService;

     }

 }