package fr.ifremer.quadrige3.core.dao.technical;
   
   /*-
    * #%L
    * Quadrige3 Core :: Quadrige3 Core Shared
    * $Id:$
    * $HeadURL:$
    * %%
    * Copyright (C) 2017 Ifremer
   * %%
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Affero General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   * #L%
   */
  
  import org.apache.commons.lang3.StringUtils;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  
  import java.sql.Timestamp;
  import java.time.*;
  import java.time.format.DateTimeFormatter;
  import java.time.format.DateTimeParseException;
  import java.util.Date;
  import java.util.TimeZone;
  
  /**
   * Utilitaire sur les heures.
   */
  public class Times {
  
      /**
       * Constant <code>FILE_SUFFIX_DATE_FORMAT</code>
       */
      private static final DateTimeFormatter FILE_SUFFIX_DATE_FORMAT = DateTimeFormatter.ofPattern("yyyy-MM-dd-HHmmss");
  
      /**
       * Logger.
       */
      private static final Log LOG = LogFactory.getLog(Times.class);
  
      /**
       * Hour format.
       */
      private static final DateTimeFormatter HOUR_MINUTE_FORMAT = DateTimeFormatter.ofPattern("HH:mm");
  
      /**
       * Conversion d une heure (en seconde) en String hh:mm.
       *
       * @param seconds L heure
       * @return String
       */
      public static String secondsToString(final Integer seconds) {
          if (seconds == null) return null; // or empty string ?
          return LocalTime.ofSecondOfDay(seconds).format(HOUR_MINUTE_FORMAT);
      }
  
      /**
       * Convertir une heure hh:mm en secondes.
       *
       * @param string String
       * @return Heure en seconde
       */
      public static Integer stringToSeconds(final String string) throws DateTimeParseException {
          if (StringUtils.isBlank(string)) return null;
          return LocalTime.parse(string, HOUR_MINUTE_FORMAT).toSecondOfDay();
      }
  
      /**
       * Convertir une heure en date.
       *
       * @param seconds L heure a convertir
       * @return La date
       */
      public static Date secondsToDate(final Integer seconds) {
          if (seconds == null) return null;
          return Dates.convertToDate(LocalDate.now().atTime(LocalTime.ofSecondOfDay(seconds)), TimeZone.getTimeZone(ZoneOffset.UTC));
      }
  
      /**
       * Convert date into hour (second).
       *
       * @param date Date
       * @return Hour in seconds
       */
      public static Integer dateToSeconds(final Date date) {
          if (date == null) return null;
          return Dates.convertToLocalDateTime(date, TimeZone.getTimeZone(ZoneOffset.UTC)).toLocalTime().toSecondOfDay();
      }
 
     /**
      * Human readable format of a period of time
      *
      * @param millis period of time in millisecond
      * @return pretty print
      */
     public static String durationToString(long millis) {
         return Duration.ofMillis(millis).toString()
                 .substring(2)
                 .replaceAll("(\\d[HMS])(?!$)", "$1 ")
                 .toLowerCase();
     }
 
     /**
      * <p>
      * getTimestampOrNull.
      * </p>
      *
      * @param date a {@link java.util.Date} object.
      * @return a {@link java.sql.Timestamp} object.
      */
     public static Timestamp getTimestampOrNull(Date date) {
         return date == null ? null : new Timestamp(date.getTime());
     }
 
     public static String getFileSuffix() {
         return getFileSuffix(LocalDateTime.now());
     }
 
     public static String getFileSuffix(LocalDateTime localDateTime) {
         return localDateTime.format(FILE_SUFFIX_DATE_FORMAT);
     }
 }