/**
    * Copyright 2004-2013 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.hr.lm.workflow;
  
  
  import org.apache.cxf.common.util.StringUtils;
  import org.apache.log4j.Logger;
  import org.kuali.hr.job.Job;
  import org.kuali.hr.lm.leaveblock.LeaveBlock;
  import org.kuali.hr.time.assignment.Assignment;
  import org.kuali.hr.time.calendar.CalendarEntries;
  import org.kuali.hr.time.roles.TkRole;
  import org.kuali.hr.time.roles.service.TkRoleService;
  import org.kuali.hr.time.service.base.TkServiceLocator;
  import org.kuali.hr.time.util.TKUtils;
  import org.kuali.hr.time.util.TkConstants;
  import org.kuali.hr.time.workarea.WorkArea;
  import org.kuali.rice.kew.api.identity.Id;
  import org.kuali.rice.kew.api.identity.PrincipalId;
  import org.kuali.rice.kew.api.rule.RoleName;
  import org.kuali.rice.kew.engine.RouteContext;
  import org.kuali.rice.kew.routeheader.DocumentContent;
  import org.kuali.rice.kew.rule.AbstractRoleAttribute;
  import org.kuali.rice.kew.rule.ResolvedQualifiedRole;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  
  public class LeaveRequestWorkflowAttribute extends AbstractRoleAttribute {
      private static final Logger LOG = Logger.getLogger(LeaveRequestWorkflowAttribute.class);
  
      @Override
      public List<String> getQualifiedRoleNames(String roleName, DocumentContent documentContent) {
          List<String> roles = new ArrayList<String>();
          String documentNumber = documentContent.getRouteContext().getDocument().getDocumentId();
          LeaveRequestDocument leaveRequestDocument = TkServiceLocator.getLeaveRequestDocumentService().getLeaveRequestDocument(documentNumber);
  
          if (leaveRequestDocument != null) {
              LeaveBlock leaveBlock = leaveRequestDocument.getLeaveBlock();
              CalendarEntries ce = getCalendarEntry(leaveBlock);
              List<Assignment> assignments = TkServiceLocator.getAssignmentService().getAssignmentsByCalEntryForLeaveCalendar(leaveBlock.getPrincipalId(), ce);
              for (Assignment assignment : assignments) {
                  String roleStr = roleName + "_" +assignment.getWorkArea();
                  if(!roles.contains(roleStr)){
                      roles.add(roleStr);
                  }
              }
          }
          return roles;
      }
  
      /**
       * Role name is passed in in the routing rule.
       */
      @Override
      public ResolvedQualifiedRole resolveQualifiedRole(RouteContext routeContext, String roleName, String qualifiedRole) {
          ResolvedQualifiedRole rqr = new ResolvedQualifiedRole();
          Long workAreaNumber = null;
  
          try {
              int pos = qualifiedRole.lastIndexOf("_");
              if (pos > -1) {
                  String subs = qualifiedRole.substring(pos+1, qualifiedRole.length());
                  workAreaNumber = Long.parseLong(subs);
              }
          } catch (NumberFormatException nfe) {
              LOG.error("qualifiedRole did not contain numeric data for work area.");
          }
  
          if (workAreaNumber == null) {
              throw new RuntimeException("Unable to resolve work area during routing.");
          }
  
          List<Id> principals = new ArrayList<Id>();
          String routeHeaderId = routeContext.getDocument().getDocumentId();
          TkRoleService roleService = TkServiceLocator.getTkRoleService();
          LeaveRequestDocument leaveRequestDocument = TkServiceLocator.getLeaveRequestDocumentService().getLeaveRequestDocument(routeHeaderId);
          LeaveBlock leaveBlock = TkServiceLocator.getLeaveBlockService().getLeaveBlock(leaveRequestDocument.getLmLeaveBlockId());
          WorkArea workArea = TkServiceLocator.getWorkAreaService().getWorkArea(workAreaNumber, leaveBlock.getLeaveDate());
  
          // KPME-1071
          List<TkRole> approvers = roleService.getWorkAreaRoles(workAreaNumber, roleName, TKUtils.getCurrentDate());
          List<TkRole> approverDelegates = roleService.getWorkAreaRoles(workAreaNumber, TkConstants.ROLE_TK_APPROVER_DELEGATE, TKUtils.getCurrentDate());
          List<TkRole> roles = new ArrayList<TkRole>();
          roles.addAll(approvers);
         roles.addAll(approverDelegates);
 
         for (TkRole role : roles) {
             //Position routing
             if(StringUtils.isEmpty(role.getPrincipalId())){
                 String positionNumber = role.getPositionNumber();
                 List<Job> lstJobsForPosition = TkServiceLocator.getJobService().getActiveJobsForPosition(positionNumber, getCalendarEntry(leaveBlock).getEndPeriodDateTime());
                 for(Job job : lstJobsForPosition){
                     PrincipalId pid = new PrincipalId(job.getPrincipalId());
                     if (!principals.contains(pid)) {
                         principals.add(pid);
                     }
                 }
             } else {
                 PrincipalId pid = new PrincipalId(role.getPrincipalId());
                 if (!principals.contains(pid)) {
                     principals.add(pid);
                 }
             }
         }
 
         if (principals.size() == 0)
             throw new RuntimeException("No principals to route to. Push to exception routing.");
 
         rqr.setRecipients(principals);
         rqr.setAnnotation("Dept: "+ workArea.getDept()+", Work Area: "+workArea.getWorkArea());
 
         return rqr;
     }
 
     @Override
     public List<RoleName> getRoleNames() {
         return Collections.EMPTY_LIST;
     }
 
     private CalendarEntries getCalendarEntry(LeaveBlock leaveBlock) {
         return TkServiceLocator.getCalendarEntriesService().getCalendarEntries(leaveBlock.getCalendarId());
     }
 }