package org.kuali.ole.batch.helper;
   
   import org.apache.commons.lang.StringUtils;
   import org.kuali.ole.OLEConstants;
   import org.kuali.ole.batch.bo.OLEBatchProcessScheduleBo;
   import org.kuali.ole.batch.document.OLEBatchProcessDefinitionDocument;
   
   import java.util.Date;
   import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /**
   * Created with IntelliJ IDEA.
   * User: rajeshbabuk
   * Date: 7/20/13
   * Time: 3:32 PM
   * To change this template use File | Settings | File Templates.
   */
  public class OLESchedulerHelper {
  
      private static volatile OLESchedulerHelper helper = new OLESchedulerHelper();
  
      private OLESchedulerHelper(){
  
      }
  
      public static synchronized OLESchedulerHelper getInstance(){
          return helper;
      }
  
      public String getCronExpression(OLEBatchProcessScheduleBo oleBatchProcessScheduleBo){
          String cronExpression=null;
          String oneTimeOrRecur = oleBatchProcessScheduleBo.getOneTimeOrRecurring();
          if(oneTimeOrRecur.equalsIgnoreCase(OLEConstants.OLEBatchProcess.SCHEDULE_ONETIME)){
              Date oneDate = oleBatchProcessScheduleBo.getOneTimeDate();
              String oneTime = oleBatchProcessScheduleBo.getOneTimeStartTime();
              cronExpression = getCronExpressionForOneTime(oneDate, oneTime);
          }
  
          if(oneTimeOrRecur.equalsIgnoreCase(OLEConstants.OLEBatchProcess.SCHEDULE_RECURRING)){
              String schduleType = oleBatchProcessScheduleBo.getScheduleType();
              if(schduleType.equalsIgnoreCase(OLEConstants.OLEBatchProcess.SCHEDULE_TYPE_DAILY)){
                  String startTimeDaily = oleBatchProcessScheduleBo.getStartTime();
                  cronExpression = getCronExpressionForDaily(startTimeDaily);
              }
              if(schduleType.equalsIgnoreCase(OLEConstants.OLEBatchProcess.SCHEDULE_TYPE_WEEKLY)){
                  String startTimeWeekly = oleBatchProcessScheduleBo.getStartTime();
                  String weekDays = oleBatchProcessScheduleBo.getWeekDays();
                  cronExpression = getCronExpressionForWeekly(startTimeWeekly, weekDays);
              }
              if(schduleType.equalsIgnoreCase(OLEConstants.OLEBatchProcess.SCHEDULE_TYPE_MONTHLY)){
                  String startTimeMonthly = oleBatchProcessScheduleBo.getStartTime();
                  String dayNumberMonthly = oleBatchProcessScheduleBo.getDayNumber();
                  String monthNumberMonthly = oleBatchProcessScheduleBo.getMonthNumber();
                  cronExpression = getCronExpressionForMonthly(startTimeMonthly, dayNumberMonthly, monthNumberMonthly);
              }
          }
  
          boolean validCronExpression = org.quartz.CronExpression.isValidExpression(cronExpression);
              if(validCronExpression){
                 return cronExpression;
              }else{
                  return null;
              }
      }
  
      public String getCronExpressionForOneTime(Date oneTimeDate, String oneTime) {
          String[] oneTimeArray = oneTime.split(":");
          String hour = oneTimeArray[0];
          String minutes = oneTimeArray[1];
          String startDate = oneTimeDate.toString();
          String[] dateArray = startDate.split("\\-");
          String year = dateArray[0];
          String month = dateArray[1];
          if (month.charAt(0) == '0') {
              month = month.substring(1);
          }
          String day = dateArray[2];
          if (day.charAt(0) == '0') {
              day = day.substring(1);
          }
          String cronExp = "0 " + minutes + " " + hour + " " + day + " " + month
                  + " ? " + year;
          return cronExp;
      }
  
      public String getCronExpressionForDaily(String startTime) {
          String[] startTimeArray = startTime.split(":");
          String hour = startTimeArray[0];
          String minutes = startTimeArray[1];
          String cronExp = "0 " + minutes + " " + hour + " " + "1/1 " + "* " + "? " + "*";
          return cronExp;
      }
  
      public String getCronExpressionForWeekly(String startTime, String weekdays) {
          String[] startTimeArray = startTime.split(":");
          String hour = startTimeArray[0];
          String minutes = startTimeArray[1];
          String cronExp = "0 " + minutes + " " + hour + " " + "? " + "* " + weekdays + " *";
         return cronExp;
     }
 
     public String getCronExpressionForMonthly(String startTime, String dayNumber, String monthNumber) {
         String[] startTimeArray = startTime.split(":");
         String hour = startTimeArray[0];
         String minutes = startTimeArray[1];
         String cronExp = "0 " + minutes + " " + hour + " " + dayNumber + " " + "1/" + monthNumber + " " + "?" + " " + "*";
         return cronExp;
     }
 
     /*public String getCronExpressionForDaily24Hr(String startTime) {
         String[] time = startTime.split(":");
         String minutes = time[1];
         String hour = time[0];
         String cronExp = "0 " + minutes + " " + hour + " " + "* * ?";
         boolean validCronExpression = org.quartz.CronExpression.isValidExpression(cronExp);
         if(validCronExpression){
             return cronExp;
         }else{
             return null;
         }
     }*/
 
 
     /*private String[] splitTime(String time){
         String[] minsAndHour = new String[2];
         String[] time1 = time.split(":");
         String[] time2 = new String[2];
         Matcher spaceMatch = Pattern.compile("\\s").matcher(time1[1]);
         if(spaceMatch.matches()){
         time2 = time1[1].split("\\ ");
         }else{
             time2[0] = time1[1].substring(0,2);
             time2[1] = time1[1].substring(2);
         }
         String hour;
         String minutes;
         if (time2[1].equalsIgnoreCase(OLEConstants.OLEBatchProcess.TIME_PM)) {
             Integer hourInt = Integer.parseInt(time1[0]) + 12;
             if (hourInt == 24) {
                 hourInt = 0;
             }
             hour = hourInt.toString();
         } else {
             hour = time1[0];
         }
         minutes = time2[0];
         minsAndHour[0] = hour;
         minsAndHour[1] = minutes;
         return minsAndHour;
     }*/
 
 }