/**
    * 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.time.workflow;
  
  import org.apache.cxf.common.util.StringUtils;
  import org.apache.log4j.Logger;
  import org.kuali.hr.job.Job;
  import org.kuali.hr.lm.leavecalendar.LeaveCalendarDocument;
  import org.kuali.hr.time.assignment.Assignment;
  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 TkWorkflowLeaveCalendarAttribute extends AbstractRoleAttribute {
  
      private static final Logger LOG = Logger.getLogger(TkWorkflowLeaveCalendarAttribute.class);
  
  	@Override
  	public List<String> getQualifiedRoleNames(String roleName, DocumentContent documentContent) {
  		List<String> roles = new ArrayList<String>();
  		String routeHeaderId = documentContent.getRouteContext().getDocument().getDocumentId();
  		LeaveCalendarDocument leaveDocument = TkServiceLocator.getLeaveCalendarService().getLeaveCalendarDocument(routeHeaderId);
  
  		if (leaveDocument != null) {
  			List<Assignment> assignments = leaveDocument.getAssignments();
  			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();
  		LeaveCalendarDocument leaveCalendarDocument = TkServiceLocator.getLeaveCalendarService().getLeaveCalendarDocument(routeHeaderId);
  		WorkArea workArea = null;
          if (leaveCalendarDocument != null) {
              workArea = TkServiceLocator.getWorkAreaService().getWorkArea(workAreaNumber, leaveCalendarDocument.getAsOfDate());
          }
  
          // 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, leaveCalendarDocument.getCalendarEntry().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;
 	}
 
 }