/*
    * Copyright 2010 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.osedu.org/licenses/ECL-2.0
    *
   * 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.student.contract.model.util;
  
  import java.text.DateFormat;
  import java.text.ParseException;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import java.util.TimeZone;
  
  import org.joda.time.DateTime;
  import org.joda.time.DateTimeZone;
  import org.joda.time.LocalDateTime;
  import org.joda.time.format.DateTimeFormat;
  import org.joda.time.format.DateTimeFormatter;
  import org.joda.time.format.DateTimeFormatterBuilder;
  import org.kuali.student.contract.exception.DictionaryExecutionException;
  
  /**
   *
   * @author nwright
   */
  public class DateUtility {
  
      public static String asYMD(String date)
              throws ParseException {
          if (date == null) {
              return null;
          }
          return asYMD(asDate(date));
      }
  
      public static Date asDate(String date)
              throws ParseException {
          if (date == null) {
              return null;
          }
          String[] formats = {
              "yyyy-MM-dd",
              "MM/dd/yyyy"
          };
          ParseException pe = null;
          for (int i = 0; i < formats.length; i++) {
              DateFormat df = new SimpleDateFormat(formats[i]);
              try {
                  return df.parse(date);
              } catch (ParseException e) {
                  pe = e;
              }
          }
          throw pe;
      }
  
      public static String asYMD(Date date) {
          if (date == null) {
              return null;
          }
          DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
          return df.format(date);
      }
      
      private static DateTimeFormatter adjustToEasternTimeZoneFormatter = DateTimeFormat.forPattern("YYYY-MM-dd HH:mm zzz");
      
      public static String asYMDHMInEasternTimeZone (DateTime date) {
      	if (date == null)
      		return null;
      	
      	DateTime adjustedDate = date.withZone(DateTimeZone.forTimeZone(TimeZone.getTimeZone("America/Toronto")));
      	
      	String formattedDate = adjustToEasternTimeZoneFormatter.print(adjustedDate);
      	
  //    	DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm zzz", Locale.);
  
      	return formattedDate;
      }
  }