/* Copyright 2002-2025 CS GROUP
    * Licensed to CS GROUP (CS) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * CS licenses this file to You under the Apache 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.apache.org/licenses/LICENSE-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.orekit.files.rinex.navigation.parsers.ephemeris;
  
  import org.orekit.files.rinex.navigation.RinexNavigation;
  import org.orekit.files.rinex.navigation.parsers.ParseInfo;
  import org.orekit.files.rinex.utils.ParsingUtils;
  import org.orekit.propagation.analytical.gnss.data.GLONASSFdmaNavigationMessage;
  import org.orekit.time.AbsoluteDate;
  import org.orekit.utils.Constants;
  import org.orekit.utils.units.Unit;
  
  /** Parser for Glonass FDMA.
   * @author Bryan Cazabonne
   * @author Luc Maisonobe
   * @since 14.0
   */
  public class GlonassFdmaParser extends AbstractEphemerisParser<GLONASSFdmaNavigationMessage> {
  
      /** Simple constructor.
       * @param parseInfo container for parsing data
       * @param message container for navigation message
       */
      public GlonassFdmaParser(final ParseInfo parseInfo, final GLONASSFdmaNavigationMessage message) {
          super(parseInfo, message);
      }
  
      /** {@inheritDoc} */
      @Override
      public void parseLine00() {
  
          final ParseInfo parseInfo = getParseInfo();
          final GLONASSFdmaNavigationMessage message = getMessage();
  
          if (parseInfo.getHeader().getFormatVersion() < 3.0) {
  
              message.setPRN(ParsingUtils.parseInt(parseInfo.getLine(), 0, 2));
  
              // Toc
              final int year = ParsingUtils.convert2DigitsYear(ParsingUtils.parseInt(parseInfo.getLine(), 3, 2));
              final int month = ParsingUtils.parseInt(parseInfo.getLine(), 6, 2);
              final int day = ParsingUtils.parseInt(parseInfo.getLine(), 9, 2);
              final int hours = ParsingUtils.parseInt(parseInfo.getLine(), 12, 2);
              final int min = ParsingUtils.parseInt(parseInfo.getLine(), 15, 2);
              final double sec = ParsingUtils.parseDouble(parseInfo.getLine(), 17, 5);
              message.setEpochToc(new AbsoluteDate(year, month, day, hours, min, sec,
                                                   parseInfo.getTimeScales().getUTC()));
  
              // clock
              message.setTauN(Unit.SECOND.toSI(-ParsingUtils.parseDouble(parseInfo.getLine(), 22, 19)));
              message.setGammaN(Unit.NONE.toSI(ParsingUtils.parseDouble(parseInfo.getLine(), 41, 19)));
  
              // Set the ephemeris epoch (same as time of clock epoch)
              message.setDate(message.getEpochToc());
  
          } else {
              message.setPRN(ParsingUtils.parseInt(parseInfo.getLine(), 1, 2));
  
              // Toc
              message.setEpochToc(parseInfo.parseDate(parseInfo.getTimeScales().getUTC()));
  
              // clock
              message.setTauN(-parseInfo.parseDouble2(Unit.ONE));
              message.setGammaN(parseInfo.parseDouble3(Unit.ONE));
              message.setTime(fmod(parseInfo.parseDouble4(Unit.ONE), Constants.JULIAN_DAY));
  
              // Set the ephemeris epoch (same as time of clock epoch)
              message.setDate(message.getEpochToc());
          }
  
      }
  
      /** {@inheritDoc} */
      @Override
      public void parseLine01() {
          super.parseLine01();
          getMessage().setHealth(getParseInfo().parseDouble4(Unit.NONE));
      }
  
      /** {@inheritDoc} */
      @Override
      public void parseLine02() {
          super.parseLine02();
          getMessage().setFrequencyNumber(getParseInfo().parseDouble4(Unit.NONE));
      }
 
     /** {@inheritDoc} */
     @Override
     public void parseLine03() {
         super.parseLine03();
         final ParseInfo parseInfo = getParseInfo();
         if (parseInfo.getHeader().getFormatVersion() < 3.045) {
             parseInfo.closePendingRecord();
         }
     }
 
     /** {@inheritDoc} */
     @Override
     public void parseLine04() {
         final ParseInfo parseInfo = getParseInfo();
         final GLONASSFdmaNavigationMessage message = getMessage();
         message.setStatusFlags(parseInfo.parseDouble1(Unit.NONE));
         message.setGroupDelayDifference(parseInfo.parseDouble2(Unit.NONE));
         message.setURA(parseInfo.parseDouble3(Unit.NONE));
         message.setHealthFlags(parseInfo.parseDouble4(Unit.NONE));
         parseInfo.closePendingRecord();
     }
 
     /** {@inheritDoc} */
     @Override
     public void closeRecord(final RinexNavigation file) {
         file.addGlonassNavigationMessage(getMessage());
     }
 
 }