/**
    * 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.util;
  
  import java.math.BigDecimal;
  import java.sql.Date;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.hr.earncodesec.EarnCodeSecurity;
  import org.kuali.hr.location.Location;
  import org.kuali.hr.paygrade.PayGrade;
  import org.kuali.hr.time.accrual.AccrualCategory;
  import org.kuali.hr.time.accrual.TimeOffAccrual;
  import org.kuali.hr.time.authorization.DepartmentalRule;
  import org.kuali.hr.time.calendar.Calendar;
  import org.kuali.hr.time.department.Department;
  import org.kuali.hr.time.earncode.EarnCode;
  import org.kuali.hr.time.earngroup.EarnGroup;
  import org.kuali.hr.time.earngroup.EarnGroupDefinition;
  import org.kuali.hr.time.paytype.PayType;
  import org.kuali.hr.time.salgroup.SalGroup;
  import org.kuali.hr.time.service.base.TkServiceLocator;
  import org.kuali.hr.time.task.Task;
  import org.kuali.hr.time.workarea.WorkArea;
  import org.kuali.kfs.coa.businessobject.Chart;
  import org.kuali.rice.kim.api.identity.Person;
  import org.kuali.rice.kim.api.services.KimApiServiceLocator;
  import org.kuali.rice.krad.service.KRADServiceLocator;
  
  /**
   * A few methods to assist with various validation tasks.
   */
  public class ValidationUtils {
  
      /**
       * For DepartmentalRule objects, if a work area is defined, you can not
       * leave the department field with a wildcard. Permission for wildcarding
       * will be checked with other methods.
       *
       * @param dr The DepartmentalRule to examine.
       * @return true if valid, false otherwise.
       */
      public static boolean validateWorkAreaDeptWildcarding(DepartmentalRule dr) {
          boolean ret = true;
  
          if (StringUtils.equals(dr.getDept(), TkConstants.WILDCARD_CHARACTER)) {
              ret = dr.getWorkArea().equals(TkConstants.WILDCARD_LONG);
          }
  
          return ret;
      }
  
  	/**
  	 * Most basic validation: Only checks for presence in the database.
  	 */
  	public static boolean validateWorkArea(Long workArea) {
  		return validateWorkArea(workArea, null);
  	}
  
  	/**
  	 * Most basic validation: Only checks for presence in the database.
  	 */
  	public static boolean validateDepartment(String department) {
  		return validateDepartment(department, null);
  	}
  
  	/**
  	 * Most basic validation: Only checks for presence in the database.
  	 */
  	public static boolean validateAccrualCategory(String accrualCategory) {
  		return validateAccrualCategory(accrualCategory, null);
  	}
  
  
  	public static boolean validateSalGroup(String salGroup, Date asOfDate) {
  		boolean valid = false;
  
  		if (StringUtils.equals(salGroup, TkConstants.WILDCARD_CHARACTER)) {
  			valid = true;
  		} else if (asOfDate != null) {
  			SalGroup sg = TkServiceLocator.getSalGroupService().getSalGroup(salGroup, asOfDate);
  			valid = (sg != null);
  		} else {
 			int count = TkServiceLocator.getSalGroupService().getSalGroupCount(salGroup);
 			valid = (count > 0);
 		}
 
 		return valid;
 	}
 
 	public static boolean validateEarnCode(String earnCode, Date asOfDate) {
 		boolean valid = false;
 
 		if (asOfDate != null) {
 			EarnCode ec = TkServiceLocator.getEarnCodeService().getEarnCode(earnCode, asOfDate);
 			valid = (ec != null);
 		} else {
 			int count = TkServiceLocator.getEarnCodeService().getEarnCodeCount(earnCode);
 			valid = (count > 0);
 		}
 
 		return valid;
 	}
 	
 	public static boolean validateEarnCodeOfAccrualCategory(String earnCode, String accrualCategory, String principalId, Date asOfDate) {
 		boolean valid = false;
 		
 		return valid;
 	}
 	
 	public static boolean validateAccCategory(String accrualCategory, Date asOfDate) {
 		boolean valid = false;
 		
 		if (asOfDate != null) {
 			AccrualCategory ac = TkServiceLocator.getAccrualCategoryService().getAccrualCategory(accrualCategory, asOfDate);
 			valid = (ac != null);
 		} else {
 			Map<String, String> fieldValues = new HashMap<String, String>();
 			fieldValues.put("accrualCategory", accrualCategory);
 			int matches = KRADServiceLocator.getBusinessObjectService().countMatching(AccrualCategory.class, fieldValues);
 			
 			valid = matches > 0;
 		}
 		
 		return valid;
 	}
 	
 	public static boolean validateLocation(String location, Date asOfDate) {
 		boolean valid = false;
 
 		if (asOfDate != null) {
 			Location l = TkServiceLocator.getLocationService().getLocation(location, asOfDate);
 			valid = (l != null);
 		} else {
 			int count = TkServiceLocator.getLocationService().getLocationCount(location);
 			valid = (count > 0);
 		}
 
 		return valid;
 	}
 
 	public static boolean validatePayType(String payType, Date asOfDate) {
 		boolean valid = false;
 
 		if (asOfDate != null) {
 			PayType pt = TkServiceLocator.getPayTypeService().getPayType(payType, asOfDate);
 			valid = (pt != null);
 		} else {
 			int count = TkServiceLocator.getPayTypeService().getPayTypeCount(payType);
 			valid = (count > 0);
 		}
 
 		return valid;
 	}
 
 
 	public static boolean validatePayGrade(String payGrade, Date asOfDate) {
 		boolean valid = false;
 
 		if (asOfDate != null) {
 			PayGrade pg = TkServiceLocator.getPayGradeService().getPayGrade(payGrade, asOfDate);
 			valid = (pg != null);
 		} else {
 			int count = TkServiceLocator.getPayGradeService().getPayGradeCount(payGrade);
 			valid = (count > 0);
 		}
 
 		return valid;
 	}
 
     /**
      *
      * @param earnCode
      * @param otEarnCode If true, earn code is valid ONLY if it is an overtime earn code.
      * @param asOfDate
      * @return
      */
     public static boolean validateEarnCode(String earnCode, boolean otEarnCode, Date asOfDate) {
         boolean valid = false;
 
         if (asOfDate != null) {
             EarnCode ec = TkServiceLocator.getEarnCodeService().getEarnCode(earnCode, asOfDate);
             valid = (ec != null) && (otEarnCode ? ec.getOvtEarnCode().booleanValue() : true);
         }
 
         return valid;
     }
 
 	/**
 	 * Checks for row presence of a department, and optionally whether or not
 	 * it is active as of the specified date.
 	 */
 	public static boolean validateDepartment(String department, Date asOfDate) {
 		boolean valid = false;
 
         if (StringUtils.isEmpty(department)) {
           // do nothing, let false be returned.
         } else if (asOfDate != null) {
 			Department d = TkServiceLocator.getDepartmentService().getDepartment(department, asOfDate);
 		    valid = (d != null);
 		} else {
 			int count = TkServiceLocator.getDepartmentService().getDepartmentCount(department);
 			valid = (count > 0);
 		}
 
 		return valid;
 	}
 
     public static boolean validateChart(String chart) {
         boolean valid = false;
 
         if (!StringUtils.isEmpty(chart)) {
             Object o = KRADServiceLocator.getBusinessObjectService().findBySinglePrimaryKey(Chart.class, chart);
             valid = (o instanceof Chart);
         }
 
         return valid;
     }
 
 	/**
 	 * Checks for row presence of a work area, and optionally whether or not
 	 * it is active as of the specified date.
 	 */
     public static boolean validateWorkArea(Long workArea, Date asOfDate) {
         return ValidationUtils.validateWorkArea(workArea, null, asOfDate);
     }
 
 	public static boolean validateWorkArea(Long workArea, String dept, Date asOfDate) {
 		boolean valid = false;
 
 		if (workArea == null) {
 			valid = false;
 		} else if (workArea.equals(TkConstants.WILDCARD_LONG)) {
 			valid = true;
 		} else if (asOfDate != null) {
 			WorkArea wa = TkServiceLocator.getWorkAreaService().getWorkArea(workArea, asOfDate);
             if (wa != null && dept != null) {
                 valid = StringUtils.equalsIgnoreCase(dept, wa.getDept());
             } else {
 			    valid = (wa != null);
             }
 		} else {
             // Not valid if no date is passed.
 		}
 
 		return valid;
 	}
 	/**
 	 * Checks for row presence of a Accrual Category, and optionally whether or not
 	 * it is active as of the specified date.
 	 */
 	public static boolean validateAccrualCategory(String accrualCategory, Date asOfDate) {
 		boolean valid = false;
 
 		if (StringUtils.equals(accrualCategory, TkConstants.WILDCARD_CHARACTER)) {
 			valid = true;
 		} else if (asOfDate != null) {
 			AccrualCategory ac = TkServiceLocator.getAccrualCategoryService().getAccrualCategory(accrualCategory, asOfDate);
 			valid = (ac != null);
 		}
 
 		return valid;
 	}
 
 	/**
 	 * Checks for row presence of a principal Id, and optionally whether or not
 	 * it is active as of the specified date.
 	 */
 	public static boolean validatePrincipalId(String principalId) {
 		boolean valid = false;
 		if (principalId != null) {
 			Person p = KimApiServiceLocator.getPersonService().getPerson(principalId);
 		    valid = (p != null);
 		}
 		return valid;
 	}
 
     /**
      * No wildcarding is accounted for in this method.
      * @param task Task "Long Name"
      * @param asOfDate Can be null, if we just want to look for the general case.
      * @return True if the task is present / valid.
      */
     public static boolean validateTask(Long task, Date asOfDate) {
         boolean valid = false;
 
         if (task != null && asOfDate != null) {
             Task t = TkServiceLocator.getTaskService().getTask(task, asOfDate);
             valid = (t != null);
         } else if (task != null) {
         	int count = TkServiceLocator.getTaskService().getTaskCount(task);
             valid = (count > 0);
         }
 
         return valid;
     }
 
     /**
      * No wildcarding is accounted for in this method.
      * @param earnGroup EarnCodeGroup
      * @param asOfDate Can be null, if we just want to look for the general case.
      * @return True if the EarnCodeGroup is present / valid.
      */
     public static boolean validateEarnGroup(String earnGroup, Date asOfDate) {
         boolean valid = false;
 
         if (earnGroup != null && asOfDate != null) {
             EarnGroup eg = TkServiceLocator.getEarnGroupService().getEarnGroup(earnGroup, asOfDate);
             valid = (eg != null);
         } else if (earnGroup != null) {
         	int count = TkServiceLocator.getEarnGroupService().getEarnGroupCount(earnGroup);
             valid = (count > 0);
         }
 
         return valid;
     }
 
     /**
      * @param earnGroup EarnCodeGroup
      * @param asOfDate
      * @return True if the EarnCodeGroup has overtime earn codes
      */
     public static boolean earnGroupHasOvertimeEarnCodes(String earnGroup, Date asOfDate) {
          if (earnGroup != null && asOfDate != null) {
              EarnGroup eg = TkServiceLocator.getEarnGroupService().getEarnGroup(earnGroup, asOfDate);
              if(eg != null) {
             	for(EarnGroupDefinition egd : eg.getEarnGroups()) {
             		if(egd.getEarnCode() != null) {
             			EarnCode ec = TkServiceLocator.getEarnCodeService().getEarnCode(egd.getEarnCode(), asOfDate);
             			if(ec != null && ec.getOvtEarnCode()) {
             				return true;
             			}
             		}
             	}
              }
          }
 
         return false;
     }
 
 
 	/**
 	 * Checks for row presence of a pay calendar
 	 */
 	public static boolean validateCalendar(String calendarName) {
 		Map<String, String> fieldValues = new HashMap<String, String>();
 		fieldValues.put("calendarName", calendarName);
 		int matches = KRADServiceLocator.getBusinessObjectService().countMatching(Calendar.class, fieldValues);
 
         return matches > 0;
 	}
 
    public static boolean duplicateDeptEarnCodeExists(EarnCodeSecurity deptEarnCode) {
 	   boolean valid = false;
 	   int count = TkServiceLocator.getEarnCodeSecurityService().getEarnCodeSecurityCount
                (deptEarnCode.getDept(), deptEarnCode.getHrSalGroup(), deptEarnCode.getEarnCode(), deptEarnCode.isEmployee() ? "1" : "0",
                        deptEarnCode.isApprover() ? "1" : "0", deptEarnCode.getLocation(), deptEarnCode.getActive() ? "Y" : "N", deptEarnCode.getEffectiveDate(), null);
        if(count == 1) {
     	   valid = true;
     	   count = TkServiceLocator.getEarnCodeSecurityService().getEarnCodeSecurityCount
                    (deptEarnCode.getDept(), deptEarnCode.getHrSalGroup(), deptEarnCode.getEarnCode(), deptEarnCode.isEmployee() ? "1" : "0",
                            deptEarnCode.isApprover() ? "1" : "0", deptEarnCode.getLocation(), deptEarnCode.getActive() ? "Y" : "N", deptEarnCode.getEffectiveDate(), deptEarnCode.getHrEarnCodeSecurityId());
     	   if(count == 1) {
     		   valid = false;
     	   }
        } else if(count > 1) {
     	   valid = true;
        }
 
 	   return valid;
    }
    
    public static boolean duplicateTimeOffAccrual (TimeOffAccrual timeOffAccrual) {
 	   boolean valid = false;
 	   int count = TkServiceLocator.getTimeOffAccrualService().getTimeOffAccrualCount
                (timeOffAccrual.getAccrualCategory(), timeOffAccrual.getEffectiveDate(), timeOffAccrual.getPrincipalId(), null);
 	   if(count == 1) {
     	   valid = true;
     	   count = TkServiceLocator.getTimeOffAccrualService().getTimeOffAccrualCount
                    (timeOffAccrual.getAccrualCategory(), timeOffAccrual.getEffectiveDate(), timeOffAccrual.getPrincipalId(), timeOffAccrual.getLmAccrualId());
     	   if(count == 1) {
     		   valid = false;
     	   }
        } else if(count > 1) {
     	   valid = true;
        }
 	   return valid;
    }
 
    /**
     * Checks for date not more than one year in the future or current date
     * 
     */
 
    public static boolean validateOneYearFutureDate(Date date){
 	   java.util.Calendar startDate = java.util.Calendar.getInstance();
 	   startDate.add(java.util.Calendar.DATE, -1);
 	   startDate.set(java.util.Calendar.SECOND, 0);
 	   startDate.set(java.util.Calendar.MINUTE, 0);
 	   startDate.set(java.util.Calendar.HOUR_OF_DAY, 0);
 	   java.util.Calendar endDate = java.util.Calendar.getInstance();
 	   endDate.add(java.util.Calendar.YEAR, 1); // One year after the current date
 	   return date.compareTo(startDate.getTime()) * date.compareTo(endDate.getTime()) <= 0;
    }
    
    /**
     * Checks for date not more than one year in the future and does not consider past date
     * 
     */
 
    public static boolean validateOneYearFutureEffectiveDate(Date date){
 	   java.util.Calendar startDate = java.util.Calendar.getInstance();
 	   startDate.set(java.util.Calendar.MILLISECOND, 0);
 	   startDate.set(java.util.Calendar.SECOND, 0);
 	   startDate.set(java.util.Calendar.MINUTE, 0);
 	   startDate.set(java.util.Calendar.HOUR_OF_DAY, 0);
 	   startDate.add(java.util.Calendar.YEAR, 1); // One year after the current date
 	   return date.compareTo(startDate.getTime()) <= 0;
    }
    
    /**
     * Checks for date in the future
     * 
     */
    
    public static boolean validateFutureDate(Date date){
 	   java.util.Calendar startDate = java.util.Calendar.getInstance();
 	   startDate.add(java.util.Calendar.DATE, 0);
 	   startDate.set(java.util.Calendar.SECOND, 0);
 	   startDate.set(java.util.Calendar.MINUTE, 0);
 	   startDate.set(java.util.Calendar.HOUR_OF_DAY, 0);
 	   return date.compareTo(startDate.getTime()) > 0;
    }
 
 	/**
 	 * Checks for row presence of a pay calendar by calendar type
 	 */
 	public static boolean validateCalendarByType(String calendarName, String calendarType) {
 		Map<String, String> fieldValues = new HashMap<String, String>();
 		fieldValues.put("calendarName", calendarName);
 		fieldValues.put("calendarTypes", calendarType);
 		int matches = KRADServiceLocator.getBusinessObjectService().countMatching(Calendar.class, fieldValues);
 		
 		return matches > 0;
 	}
 	
 	public static boolean validateRecordMethod(String recordMethod, String accrualCategory, Date asOfDate) {
 		boolean valid = false;
 		if (asOfDate != null) {
 			AccrualCategory ac = TkServiceLocator.getAccrualCategoryService().getAccrualCategory(accrualCategory, asOfDate);
 			if (ac != null
                     && ac.getUnitOfTime() != null) {
                 if (TkConstants.RECORD_METHOD.HOUR.equals(ac.getUnitOfTime())
                         && (TkConstants.RECORD_METHOD.HOUR.equals(recordMethod))
                             || TkConstants.RECORD_METHOD.TIME.equals(recordMethod)) {
                     valid = true;
                 } else {
                     valid = StringUtils.equalsIgnoreCase(ac.getUnitOfTime(), recordMethod);
                 }
 
             }
 		}
 		return valid;
 	}
 	
 }