/*

  * Copyright 2005-2007 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.kns.workflow.service.impl;

 import java.text.MessageFormat;

 import java.util.ArrayList;

 import java.util.List;

 import org.apache.commons.lang.StringUtils;

 import org.apache.commons.lang.time.StopWatch;

 import org.kuali.rice.core.api.exception.RiceRuntimeException;

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

 import org.kuali.rice.kew.dto.RouteNodeInstanceDTO;

 import org.kuali.rice.kew.exception.DocumentTypeNotFoundException;

 import org.kuali.rice.kew.exception.InvalidActionTakenException;

 import org.kuali.rice.kew.exception.WorkflowException;

 import org.kuali.rice.kew.service.WorkflowInfo;

 import org.kuali.rice.kew.util.KEWConstants;

 import org.kuali.rice.kim.bo.Group;

 import org.kuali.rice.kim.bo.Person;

 import org.kuali.rice.kim.bo.entity.KimPrincipal;

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

 import org.kuali.rice.kns.bo.AdHocRouteRecipient;

 import org.kuali.rice.kns.exception.UnknownDocumentIdException;

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

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

 import org.kuali.rice.kns.workflow.service.KualiWorkflowDocument;

 import org.kuali.rice.kns.workflow.service.KualiWorkflowInfo;

 import org.kuali.rice.kns.workflow.service.WorkflowDocumentService;

 import org.springframework.transaction.annotation.Transactional;

 /**

  * This class is the implementation of the WorkflowDocumentService, which makes use of Workflow.

  */

 @Transactional

 public class WorkflowDocumentServiceImpl implements WorkflowDocumentService {

     private static org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(WorkflowDocumentServiceImpl.class);

     private KualiWorkflowInfo workflowInfoService;

     public boolean workflowDocumentExists(String documentHeaderId) {

         boolean exists = false;

         if (StringUtils.isBlank(documentHeaderId)) {

             throw new IllegalArgumentException("invalid (blank) documentHeaderId");

         }

         Long routeHeaderId = null;

         try {

             routeHeaderId = new Long(documentHeaderId);

         }

         catch (NumberFormatException e) {

             throw new IllegalArgumentException("cannot convert '" + documentHeaderId + "' into a Long");

         }

         exists = workflowInfoService.routeHeaderExists(routeHeaderId);

         return exists;

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#createWorkflowDocument(java.lang.String,

      *      org.kuali.rice.kew.user.WorkflowUser)

      */

     public KualiWorkflowDocument createWorkflowDocument(String documentTypeId, Person person) throws WorkflowException {

         String watchName = "createWorkflowDocument";

         StopWatch watch = new StopWatch();

         watch.start();

         if (LOG.isDebugEnabled()) {

             LOG.debug(watchName + ": started");

         }

         if (StringUtils.isBlank(documentTypeId)) {

             throw new IllegalArgumentException("invalid (blank) documentTypeId");

         }

         if (person == null) {

             throw new IllegalArgumentException("invalid (null) person");

         }

         if (StringUtils.isBlank(person.getPrincipalName())) {

             throw new IllegalArgumentException("invalid (empty) PrincipalName");

         }

         if (LOG.isDebugEnabled()) {

             LOG.debug("creating workflowDoc(" + documentTypeId + "," + person.getPrincipalName() + ")");

         }

         KualiWorkflowDocument document = new KualiWorkflowDocumentImpl(person.getPrincipalId(), documentTypeId);

         // workflow doesn't complain about invalid docTypes until the first call to getRouteHeaderId, but the rest of our code

         // assumes that you get the exception immediately upon trying to create a document of that invalid type

         //

         // and it throws the generic WorkflowException, apparently, instead of the more specific DocumentTypeNotFoundException,

         // so as long as I'm here I'll do that conversion as well

         try {

             document.getRouteHeaderId();

         }

         catch (WorkflowException e) {

             if (e.getMessage().contains("Could not locate the given document type name")) {

                 throw new DocumentTypeNotFoundException("unknown document type '" + documentTypeId + "'");

             }

             throw e;

         }

         watch.stop();

         if (LOG.isDebugEnabled()) {

             LOG.debug(watchName + ": " + watch.toString());        

         }

         return document;

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#createWorkflowDocument(java.lang.Long,

      *      org.kuali.rice.kew.user.WorkflowUser)

      */

     public KualiWorkflowDocument createWorkflowDocument(Long documentHeaderId, Person user) throws WorkflowException {

         if (documentHeaderId == null) {

             throw new IllegalArgumentException("invalid (null) documentHeaderId");

         }

         if (user == null) {

             throw new IllegalArgumentException("invalid (null) workflowUser");

         }

         else if (StringUtils.isEmpty(user.getPrincipalName())) {

             throw new IllegalArgumentException("invalid (empty) workflowUser");

         }

         if (LOG.isDebugEnabled()) {

             LOG.debug("retrieving document(" + documentHeaderId + "," + user.getPrincipalName() + ")");

         }

         KualiWorkflowDocument document = new KualiWorkflowDocumentImpl(user.getPrincipalId(), documentHeaderId);

         if (document.getRouteHeader() == null) {

             throw new UnknownDocumentIdException("unable to locate document with documentHeaderId '" + documentHeaderId + "'");

         }

         return document;

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#acknowledge(org.kuali.rice.kew.rule.FlexDoc)

      */

     public void acknowledge(KualiWorkflowDocument workflowDocument, String annotation, List<AdHocRouteRecipient> adHocRecipients) throws WorkflowException {

         if (LOG.isDebugEnabled()) {

             LOG.debug("acknowleding document(" + workflowDocument.getRouteHeaderId() + ",'" + annotation + "')");

         }

         handleAdHocRouteRequests(workflowDocument, annotation, filterAdHocRecipients(adHocRecipients, new String[] { KEWConstants.ACTION_REQUEST_ACKNOWLEDGE_REQ, KEWConstants.ACTION_REQUEST_FYI_REQ }));

         workflowDocument.acknowledge(annotation);

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#approve(org.kuali.rice.kew.rule.FlexDoc)

      */

     public void approve(KualiWorkflowDocument workflowDocument, String annotation, List<AdHocRouteRecipient> adHocRecipients) throws WorkflowException {

         if (LOG.isDebugEnabled()) {

             LOG.debug("approving document(" + workflowDocument.getRouteHeaderId() + ",'" + annotation + "')");

         }

         handleAdHocRouteRequests(workflowDocument, annotation, filterAdHocRecipients(adHocRecipients, new String[] { KEWConstants.ACTION_REQUEST_ACKNOWLEDGE_REQ, KEWConstants.ACTION_REQUEST_FYI_REQ, KEWConstants.ACTION_REQUEST_APPROVE_REQ }));

         workflowDocument.approve(annotation);

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#superUserApprove(org.kuali.rice.kns.workflow.service.KualiWorkflowDocument,

      *      java.lang.String)

      */

     public void superUserApprove(KualiWorkflowDocument workflowDocument, String annotation) throws WorkflowException {

             if ( LOG.isInfoEnabled() ) {

                     LOG.info("super user approve document(" + workflowDocument.getRouteHeaderId() + ",'" + annotation + "')");

             }

         workflowDocument.superUserApprove(annotation);

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#superUserCancel(org.kuali.rice.kns.workflow.service.KualiWorkflowDocument,

      *      java.lang.String)

      */

     public void superUserCancel(KualiWorkflowDocument workflowDocument, String annotation) throws WorkflowException {

         LOG.info("super user cancel document(" + workflowDocument.getRouteHeaderId() + ",'" + annotation + "')");

         workflowDocument.superUserCancel(annotation);

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#superUserDisapprove(org.kuali.rice.kns.workflow.service.KualiWorkflowDocument,

      *      java.lang.String)

      */

     public void superUserDisapprove(KualiWorkflowDocument workflowDocument, String annotation) throws WorkflowException {

             if ( LOG.isInfoEnabled() ) {

                     LOG.info("super user disapprove document(" + workflowDocument.getRouteHeaderId() + ",'" + annotation + "')");

             }

         workflowDocument.superUserDisapprove(annotation);

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#blanketApprove(org.kuali.rice.kew.rule.FlexDoc)

      */

     public void blanketApprove(KualiWorkflowDocument workflowDocument, String annotation, List<AdHocRouteRecipient> adHocRecipients) throws WorkflowException {

         if (LOG.isDebugEnabled()) {

             LOG.debug("blanket approving document(" + workflowDocument.getRouteHeaderId() + ",'" + annotation + "')");

         }

         handleAdHocRouteRequests(workflowDocument, annotation, filterAdHocRecipients(adHocRecipients, new String[] { KEWConstants.ACTION_REQUEST_ACKNOWLEDGE_REQ, KEWConstants.ACTION_REQUEST_FYI_REQ }));

         workflowDocument.blanketApprove(annotation);

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#cancel(org.kuali.rice.kew.rule.FlexDoc)

      */

     public void cancel(KualiWorkflowDocument workflowDocument, String annotation) throws WorkflowException {

         if (LOG.isDebugEnabled()) {

             LOG.debug("canceling document(" + workflowDocument.getRouteHeaderId() + ",'" + annotation + "')");

         }

         workflowDocument.cancel(annotation);

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#clearFyi(org.kuali.rice.kew.rule.FlexDoc)

      */

     public void clearFyi(KualiWorkflowDocument workflowDocument, List<AdHocRouteRecipient> adHocRecipients) throws WorkflowException {

         if (LOG.isDebugEnabled()) {

             LOG.debug("clearing FYI for document(" + workflowDocument.getRouteHeaderId() + ")");

         }

         handleAdHocRouteRequests(workflowDocument, "", filterAdHocRecipients(adHocRecipients, new String[] { KEWConstants.ACTION_REQUEST_FYI_REQ }));

         workflowDocument.fyi();

     }

     public void sendWorkflowNotification(KualiWorkflowDocument workflowDocument, String annotation, List<AdHocRouteRecipient> adHocRecipients) throws WorkflowException {

             sendWorkflowNotification(workflowDocument, annotation, adHocRecipients, null);

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#sendWorkflowNotification(org.kuali.rice.kns.workflow.service.KualiWorkflowDocument, java.lang.String, java.util.List)

      */

     public void sendWorkflowNotification(KualiWorkflowDocument workflowDocument, String annotation, List<AdHocRouteRecipient> adHocRecipients, String notificationLabel) throws WorkflowException {

         if (LOG.isDebugEnabled()) {

             LOG.debug("sending FYI for document(" + workflowDocument.getRouteHeaderId() + ")");

         }

         handleAdHocRouteRequests(workflowDocument, annotation, adHocRecipients, notificationLabel);

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#disapprove(org.kuali.rice.kew.rule.FlexDoc)

      */

     public void disapprove(KualiWorkflowDocument workflowDocument, String annotation) throws WorkflowException {

         if (LOG.isDebugEnabled()) {

             LOG.debug("disapproving document(" + workflowDocument.getRouteHeaderId() + ",'" + annotation + "')");

         }

         workflowDocument.disapprove(annotation);

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#route(org.kuali.rice.kew.rule.FlexDoc)

      */

     public void route(KualiWorkflowDocument workflowDocument, String annotation, List<AdHocRouteRecipient> adHocRecipients) throws WorkflowException {

         if (LOG.isDebugEnabled()) {

             LOG.debug("routing document(" + workflowDocument.getRouteHeaderId() + ",'" + annotation + "')");

         }

         handleAdHocRouteRequests(workflowDocument, annotation, filterAdHocRecipients(adHocRecipients, new String[] { KEWConstants.ACTION_REQUEST_ACKNOWLEDGE_REQ, KEWConstants.ACTION_REQUEST_FYI_REQ, KEWConstants.ACTION_REQUEST_APPROVE_REQ }));

         workflowDocument.routeDocument(annotation);

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#save(org.kuali.rice.kns.workflow.service.KualiWorkflowDocument, java.lang.String)

      */

     public void save(KualiWorkflowDocument workflowDocument, String annotation) throws WorkflowException {

         if (workflowDocument.isStandardSaveAllowed()) {

         if (LOG.isDebugEnabled()) {

             LOG.debug("saving document(" + workflowDocument.getRouteHeaderId() + ",'" + annotation + "')");

         }

         workflowDocument.saveDocument(annotation);

     }

         else {

             this.saveRoutingData(workflowDocument);

         }

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#saveRoutingData(org.kuali.rice.kns.workflow.service.KualiWorkflowDocument)

      */

     public void saveRoutingData(KualiWorkflowDocument workflowDocument) throws WorkflowException {

         if (LOG.isDebugEnabled()) {

             LOG.debug("saving document(" + workflowDocument.getRouteHeaderId() + ")");

         }

         workflowDocument.saveRoutingData();

     }

     /**

      * @see org.kuali.rice.kns.workflow.service.WorkflowDocumentService#getCurrentRouteLevelName(org.kuali.rice.kns.workflow.service.KualiWorkflowDocument)

      */

     public String getCurrentRouteLevelName(KualiWorkflowDocument workflowDocument) throws WorkflowException {

         if (LOG.isDebugEnabled()) {

             LOG.debug("getting current route level name for document(" + workflowDocument.getRouteHeaderId());

         }

 //        return KEWServiceLocator.getRouteHeaderService().getRouteHeader(workflowDocument.getRouteHeaderId()).getCurrentRouteLevelName();

         KualiWorkflowDocument freshCopyWorkflowDoc = createWorkflowDocument(workflowDocument.getRouteHeaderId(), GlobalVariables.getUserSession().getPerson());

         return freshCopyWorkflowDoc.getCurrentRouteNodeNames();

     }

     private void handleAdHocRouteRequests(KualiWorkflowDocument workflowDocument, String annotation, List<AdHocRouteRecipient> adHocRecipients) throws WorkflowException {

             handleAdHocRouteRequests(workflowDocument, annotation, adHocRecipients, null);

     }

     /**

      * Convenience method for generating ad hoc requests for a given document

      *

      * @param flexDoc

      * @param annotation

      * @param adHocRecipients

      * @throws InvalidActionTakenException

      * @throws InvalidRouteTypeException

      * @throws InvalidActionRequestException

      */

     private void handleAdHocRouteRequests(KualiWorkflowDocument workflowDocument, String annotation, List<AdHocRouteRecipient> adHocRecipients, String notificationLabel) throws WorkflowException {

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

             String currentNode = null;

             String[] currentNodes = workflowDocument.getNodeNames();

             if (currentNodes.length == 0) {

                 WorkflowInfo workflowInfo = new WorkflowInfo();

                 RouteNodeInstanceDTO[] nodes = workflowInfo.getTerminalNodeInstances(workflowDocument.getRouteHeaderId());

                 currentNodes = new String[nodes.length];

                 for (int nodeIndex = 0; nodeIndex < nodes.length; nodeIndex++) {

                     currentNodes[nodeIndex] = nodes[nodeIndex].getName();

                 }

             }

             // for now just pick a node and go with it...

             for (int i = 0; i < currentNodes.length; i++) {

                 currentNode = currentNodes[i];

             }

             for (AdHocRouteRecipient recipient : adHocRecipients) {

                 if (StringUtils.isNotEmpty(recipient.getId())) {

                         String newAnnotation = annotation;

                         if ( StringUtils.isBlank( annotation ) ) {

                                 try {

                                         String message = KNSServiceLocator.getKualiConfigurationService().getPropertyString(RiceKeyConstants.MESSAGE_ADHOC_ANNOTATION);

                                         newAnnotation = MessageFormat.format(message, GlobalVariables.getUserSession().getPrincipalName() );

                                 } catch ( Exception ex ) {

                                         LOG.warn("Unable to set annotation", ex );

                                 }

                         }

                     if (AdHocRouteRecipient.PERSON_TYPE.equals(recipient.getType())) {

                         // TODO make the 1 a constant

                             KimPrincipal principal = KIMServiceLocator.getIdentityManagementService().getPrincipalByPrincipalName(recipient.getId());

                                 if (principal == null) {

                                         throw new RiceRuntimeException("Could not locate principal with name '" + recipient.getId() + "'");

                                 }

                         workflowDocument.adHocRouteDocumentToPrincipal(recipient.getActionRequested(), currentNode, newAnnotation, principal.getPrincipalId(), "", true, notificationLabel);

                     }

                     else {

                             Group group = KIMServiceLocator.getIdentityManagementService().getGroup(recipient.getId());

                                 if (group == null) {

                                         throw new RiceRuntimeException("Could not locate group with id '" + recipient.getId() + "'");

                                 }

                             workflowDocument.adHocRouteDocumentToGroup(recipient.getActionRequested(), currentNode, newAnnotation, group.getGroupId() , "", true, notificationLabel);

                     }

                 }

             }

         }

     }

     /**

      * Convenience method to filter out any ad hoc recipients that should not be allowed given the action requested of the user that

      * is taking action on the document

      *

      * @param adHocRecipients

      */

     private List<AdHocRouteRecipient> filterAdHocRecipients(List<AdHocRouteRecipient> adHocRecipients, String[] validTypes) {

         // now filter out any but ack or fyi from the ad hoc list

         List<AdHocRouteRecipient> realAdHocRecipients = new ArrayList<AdHocRouteRecipient>();

         if (adHocRecipients != null) {

             for (AdHocRouteRecipient proposedRecipient : adHocRecipients) {

                 if (StringUtils.isNotBlank(proposedRecipient.getActionRequested())) {

                     for (int i = 0; i < validTypes.length; i++) {

                         if (validTypes[i].equals(proposedRecipient.getActionRequested())) {

                             realAdHocRecipients.add(proposedRecipient);

                         }

                     }

                 }

             }

         }

         return realAdHocRecipients;

     }

     public void setWorkflowInfoService(KualiWorkflowInfo workflowInfoService) {

         this.workflowInfoService = workflowInfoService;

     }

     public KualiWorkflowInfo getWorkflowInfoService() {

         return workflowInfoService;

     }

 }