/* Copyright 2002-2026 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.hipparchus.util.FastMath;
  import org.orekit.files.rinex.navigation.RinexNavigation;
  import org.orekit.files.rinex.navigation.parsers.ParseInfo;
  import org.orekit.propagation.analytical.gnss.data.NavICLegacyNavigationMessage;
  import org.orekit.propagation.analytical.gnss.data.NavICLegacyNavigationMessageFactory;
  import org.orekit.time.GNSSDate;
  import org.orekit.utils.units.Unit;
  
  /** Parser for NavIC legacy.
   * @author Bryan Cazabonne
   * @author Luc Maisonobe
   * @since 14.0
   */
  public class NavICLnavParser
      extends LegacyNavigationParser<NavICLegacyNavigationMessage, NavICLegacyNavigationMessageFactory> {
  
      /** URA index to URA mapping (table 23 of NavIC ICD). */
      // CHECKSTYLE: stop Indentation check
      static final double[] NAVIC_URA = {
             2.40,    3.40,    4.85,   6.85,
             9.65,   13.65,   24.00,  48.00,
            96.00,  192.00,  384.00, 768.00,
          1536.00, 3072.00, 6144.00, Double.NaN
      };
      // CHECKSTYLE: resume Indentation check
  
      /** Simple constructor.
       * @param parseInfo container for parsing data
       * @param factory factory for navigation message
       */
      public NavICLnavParser(final ParseInfo parseInfo, final NavICLegacyNavigationMessageFactory factory) {
          super(parseInfo, factory);
      }
  
      /** {@inheritDoc} */
      @Override
      public void parseLine00() {
          final ParseInfo parseInfo = getParseInfo();
          parseSvEpochSvClockLine(parseInfo.getTimeScales().getNavIC(), parseInfo, getFactory());
      }
  
      /** {@inheritDoc} */
      @Override
      public void parseLine01() {
          super.parseLine01();
          // for NavIC legacy, Issue Of Data applies to both clock and ephemeris
          final NavICLegacyNavigationMessageFactory factory = getFactory();
          factory.setIodc(factory.getIode());
      }
  
      /** {@inheritDoc} */
      @Override
      public void parseLine06() {
          super.parseLine06();
  
          // for NavIC legacy, the User Range Accurary is provided as an index in a table
          // the base class implementation just parsed it as a double, we need to fix it
          final NavICLegacyNavigationMessageFactory factory = getFactory();
          final int index = (int) FastMath.rint(factory.getSvAccuracy());
          factory.setSvAccuracy(NAVIC_URA[FastMath.min(index, NAVIC_URA.length - 1)]);
  
      }
  
      /** {@inheritDoc} */
      @Override
      public void parseLine07() {
          final ParseInfo parseInfo = getParseInfo();
          final NavICLegacyNavigationMessageFactory factory = getFactory();
          factory.setTransmissionTime(new GNSSDate(factory.getTimeOfEphemeris().getWeekNumber(),
                                                   parseInfo.parseDouble1(Unit.SECOND),
                                                   factory.getSystem()));
          // there is no fit interval in NavIC L message
          parseInfo.closePendingRecord();
      }
  
      /** {@inheritDoc} */
      @Override
      public void closeRecord(final RinexNavigation file) {
          file.addNavICLegacyNavigationMessage(getMessage());
      }
  
 }