/**
    * 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.kpme.core.bo;
  
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.Comparator;
  import java.util.Date;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.commons.lang.StringUtils;
  import org.joda.time.LocalDate;
  import org.kuali.kpme.core.lookup.KPMELookupableHelper;
  import org.kuali.rice.kns.lookup.LookupUtils;
  import org.kuali.rice.krad.bo.BusinessObject;
  import org.kuali.rice.krad.lookup.CollectionIncomplete;
  
  public abstract class HrEffectiveDateActiveLookupableHelper extends KPMELookupableHelper {
  
  	/**
  	 * 
  	 */
  	private static final long serialVersionUID = 1L;
  
  	@SuppressWarnings("unchecked")
  	@Override
  	/**
  	 * Core HR Effective dating lookup logic
  	 * alter at your own risk
  	 */
  	public List<? extends BusinessObject> getSearchResults(
  			Map<String, String> fieldValues) {
  		if (fieldValues.containsKey("workArea")
  				&& StringUtils.equals(fieldValues.get("workArea"), "%")) {
  			fieldValues.put("workArea", "");
  		}
  		if (fieldValues.containsKey("jobNumber")
  				&& StringUtils.equals(fieldValues.get("jobNumber"), "%")) {
  			fieldValues.put("jobNumber", "");
  		}
  		if (fieldValues.containsKey("dept")
  				&& StringUtils.equals(fieldValues.get("dept"), "%")) {
  			fieldValues.put("dept", "");
  		}
  		if (fieldValues.containsKey("principalId")
  				&& StringUtils.equals(fieldValues.get("principalId"), "%")) {
  			fieldValues.put("principalId", "");
  		}		
  		String showHistory = "Y";
  		if (fieldValues.containsKey("history")) {
  			showHistory = fieldValues.get("history");
  			fieldValues.remove("history");
  		}
  		String active = "";
  		if(fieldValues.containsKey("active")){
  			active = fieldValues.get("active");
  			fieldValues.put("active", "");
  		}
  		
  		List<HrBusinessObject> hrObjList = (List<HrBusinessObject>)super.getSearchResults(fieldValues);
  		//Create a principalId+jobNumber map as this is the unique key for results
  		Map<String,List<HrBusinessObject>> hrBusinessMap = new HashMap<String,List<HrBusinessObject>>();
  		
  		for(HrBusinessObject hrObj : hrObjList){
  			String key = hrObj.getUniqueKey();
  			
  			//If no key exists for this business object return full collection
  			if(StringUtils.isEmpty(key)){
  				return hrObjList;
  			}
  			if(hrBusinessMap.get(key)!= null){
  				List<HrBusinessObject> lstHrBusinessList = hrBusinessMap.get(key);
  				lstHrBusinessList.add(hrObj);
  			} else {
  				List<HrBusinessObject> lstHrBusinessObj = new ArrayList<HrBusinessObject>();
  				lstHrBusinessObj.add(hrObj);
  				hrBusinessMap.put(key, lstHrBusinessObj);
  			}
  		}
  		
  		List<BusinessObject> finalBusinessObjectList = new ArrayList<BusinessObject>();
  		
  		for(List<HrBusinessObject> lstHrBusinessObj: hrBusinessMap.values()){
 			Collections.sort(lstHrBusinessObj, new EffectiveDateTimestampCompare());
 			Collections.reverse(lstHrBusinessObj);
 		}
 		
 		
 		LocalDate currDate = LocalDate.now();
 		//Active = Both and Show History = Yes
 		//return all results
 		if(StringUtils.isEmpty(active) && StringUtils.equals("Y", showHistory)){
 			return hrObjList;
 		} 
 		//Active = Both and show history = No
 		//return the most effective results from today and any future rows
 		else if(StringUtils.isEmpty(active) && StringUtils.equals("N", showHistory)){
 			for(List<HrBusinessObject> lstHrBusiness : hrBusinessMap.values()){
 				for(HrBusinessObject hrBus : lstHrBusiness){
 					if(hrBus.getEffectiveLocalDate().isBefore(currDate)){
 						finalBusinessObjectList.add(hrBus);
 						break;
 					} else {
 						finalBusinessObjectList.add(hrBus);
 					}
 				}
 			}
 		}
 		//Active = Yes and Show History = No
 		//return all active records as of today and any active future rows
 		//if there is an inactive record before the active one then do not show the results as this record is inactive
 		else if(StringUtils.equals(active, "Y") && StringUtils.equals("N", showHistory)){
 			for(List<HrBusinessObject> lstHrBus : hrBusinessMap.values()){
 				for(HrBusinessObject hrBusinessObject : lstHrBus){
 					if(!hrBusinessObject.isActive() && hrBusinessObject.getEffectiveLocalDate().isBefore(currDate)){
 						break;
 					}
 					else {
 						if(hrBusinessObject.getEffectiveLocalDate().isBefore(currDate)){
 							finalBusinessObjectList.add(hrBusinessObject);
 							break;
 						} else {
 							if(hrBusinessObject.isActive()){
 								finalBusinessObjectList.add(hrBusinessObject);
 							}
 						}
 					}
 				}
 			}			
 		}
 		//Active = Yes and Show History = Yes
 		//return all active records from database
 		//if there is an inactive record before the active one then do not show the results as this record is inactive
 		else if(StringUtils.equals(active, "Y") && StringUtils.equals("Y", showHistory)){
 			for(List<HrBusinessObject> lstHrBus : hrBusinessMap.values()){
 				for(HrBusinessObject hrBus : lstHrBus){
 					if(!hrBus.isActive() && hrBus.getEffectiveLocalDate().isBefore(currDate)){
 						break;
 					}
 					else if(hrBus.isActive()){
 						finalBusinessObjectList.add(hrBus);			
 					}
 				}
 			}
 		}
 		//Active = No and Show History = Yes
 		//return all inactive records in the database
 		else if(StringUtils.equals(active, "N") && StringUtils.equals(showHistory, "Y")){
 			for(List<HrBusinessObject> lstHrBus : hrBusinessMap.values()){
 				for(HrBusinessObject hrBus : lstHrBus){
 					if(!hrBus.isActive()){
 						finalBusinessObjectList.add(hrBus);	
 					}
 				}
 			}
 		}
 		//Active = No and Show History = No
 		//return the most effective inactive rows if there are no active rows <= the curr date
 		else if(StringUtils.equals(active, "N") && StringUtils.equals(showHistory, "N")){
 			for(List<HrBusinessObject> lstHrBusiness : hrBusinessMap.values()){
 				for(HrBusinessObject hrBus : lstHrBusiness){
 					if(hrBus.getEffectiveLocalDate().isBefore(currDate)){
 						if(!hrBus.isActive()){
 							finalBusinessObjectList.add(hrBus);
 						} 
 						break;
 					} else {
 						if(!hrBus.isActive()){
 							finalBusinessObjectList.add(hrBus);
 						}
 					}
 				}
 			}
 		}
 		
 		Integer searchResultsLimit = LookupUtils.getSearchResultsLimit(businessObjectClass);
 
 		Long matchingResultsCount = Long.valueOf(finalBusinessObjectList.size());
 
 		if (matchingResultsCount.intValue() <= searchResultsLimit.intValue()) {
 
 		matchingResultsCount = Long.valueOf(0);
 
 		}
 
 		return new CollectionIncomplete(finalBusinessObjectList, matchingResultsCount);
 
 	}
 	@SuppressWarnings("rawtypes")
 	public static class EffectiveDateTimestampCompare implements Comparator, Serializable {
 
 		@Override
 		public int compare(Object arg0, Object arg1) {
             HrBusinessObject hrBusinessObject = (HrBusinessObject)arg0;
 			HrBusinessObject hrBusinessObject2 = (HrBusinessObject)arg1;
 
             Date effDate1 = hrBusinessObject.getEffectiveDate();
             Date effDate2 = hrBusinessObject2.getEffectiveDate();
             if (effDate1 == null ^ effDate2 == null) {
                 return (effDate1 == null) ? -1 : 1;
             }
             if (effDate1 == null && effDate2 == null) {
                 return 0;
             }
 			int result = hrBusinessObject.getEffectiveDate().compareTo(hrBusinessObject2.getEffectiveDate());
 			if(result==0){
 				return hrBusinessObject.getTimestamp().compareTo(hrBusinessObject2.getTimestamp());
 			}
 			return result;
 		}
 		
 	}
 	
 }