/* 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.ccsds.ndm.odm.ocm;
  
  import java.io.IOException;
  
  import org.orekit.data.DataContext;
  import org.orekit.files.ccsds.definitions.TimeSystem;
  import org.orekit.files.ccsds.ndm.ParsedUnitsBehavior;
  import org.orekit.files.ccsds.ndm.odm.OdmHeader;
  import org.orekit.files.ccsds.ndm.odm.UserDefinedWriter;
  import org.orekit.files.ccsds.section.Segment;
  import org.orekit.files.ccsds.section.XmlStructureKey;
  import org.orekit.files.ccsds.utils.ContextBinding;
  import org.orekit.files.ccsds.utils.FileFormat;
  import org.orekit.files.ccsds.utils.generation.AbstractMessageWriter;
  import org.orekit.files.ccsds.utils.generation.Generator;
  import org.orekit.utils.IERSConventions;
  
  
  /**
   * Writer for CCSDS Orbit Comprehensive Message.
   *
   * @see EphemerisOcmWriter
   * @see StreamingOcmWriter
   * @author Luc Maisonobe
   * @since 11.0
   */
  public class OcmWriter extends AbstractMessageWriter<OdmHeader, Segment<OcmMetadata, OcmData>, Ocm> {
  
      /** Version number implemented. **/
      public static final double CCSDS_OCM_VERS = 3.0;
  
      /** Padding width for aligning the '=' sign. */
      public static final int KVN_PADDING_WIDTH = 24;
  
      /** Central body equatorial radius.
       * @since 12.0
       */
      private final double equatorialRadius;
  
      /** Central body flattening.
       * @since 12.0
       */
      private final double flattening;
  
      /** Complete constructor.
       * <p>
       * Calling this constructor directly is not recommended. Users should rather use
       * {@link org.orekit.files.ccsds.ndm.WriterBuilder#buildOcmWriter()
       * writerBuilder.buildOcmWriter()}.
       * </p>
       * @param conventions IERS Conventions
       * @param equatorialRadius central body equatorial radius
       * @param flattening central body flattening
       * @param dataContext used to retrieve frames, time scales, etc.
       */
      public OcmWriter(final IERSConventions conventions,
                       final double equatorialRadius, final double flattening,
                       final DataContext dataContext) {
          super(Ocm.ROOT, Ocm.FORMAT_VERSION_KEY, CCSDS_OCM_VERS,
                new ContextBinding(
                    () -> conventions, () -> false, () -> dataContext,
                    () -> ParsedUnitsBehavior.STRICT_COMPLIANCE,
                    () -> null, () -> TimeSystem.UTC,
                    () -> 0.0, () -> 1.0));
          this.equatorialRadius = equatorialRadius;
          this.flattening       = flattening;
      }
  
      /** Get the central body equatorial radius.
       * @return central body equatorial radius
       * @since 12.0
       */
      public double getEquatorialRadius() {
          return equatorialRadius;
      }
  
      /** Get the central body flattening.
       * @return central body flattening
       * @since 12.0
       */
      public double getFlattening() {
          return flattening;
      }
 
     /** {@inheritDoc} */
     @Override
     protected void writeSegmentContent(final Generator generator, final double formatVersion,
                                        final Segment<OcmMetadata, OcmData> segment)
         throws IOException {
 
         // write the metadata
         final ContextBinding oldContext = getContext();
         final OcmMetadata    metadata   = segment.getMetadata();
         setContext(new ContextBinding(oldContext::getConventions,
                                       oldContext::isSimpleEOP,
                                       oldContext::getDataContext,
                                       oldContext::getParsedUnitsBehavior,
                                       metadata::getEpochT0,
                                       metadata::getTimeSystem,
                                       metadata::getSclkOffsetAtEpoch,
                                       metadata::getSclkSecPerSISec));
         new OcmMetadataWriter(metadata, getTimeConverter()).write(generator);
 
         // start data block
         if (generator.getFormat() == FileFormat.XML) {
             generator.enterSection(XmlStructureKey.data.name());
         }
 
         // trajectory history
         if (!segment.getData().getTrajectoryBlocks().isEmpty()) {
             for (final TrajectoryStateHistory history : segment.getData().getTrajectoryBlocks()) {
                 // write optional trajectory history block
                 new TrajectoryStateHistoryWriter(history, getTimeConverter()).write(generator);
             }
         }
 
         if (segment.getData().getPhysicBlock().isPresent()) {
             // write optional physical properties block
             new OrbitPhysicalPropertiesWriter(segment.getData().getPhysicBlock().get(), getTimeConverter()).
             write(generator);
         }
 
         // covariance history
         if (!segment.getData().getCovarianceBlocks().isEmpty()) {
             for (final OrbitCovarianceHistory history : segment.getData().getCovarianceBlocks()) {
                 // write optional covariance history block
                 new OrbitCovarianceHistoryWriter(history, getTimeConverter()).write(generator);
             }
         }
 
         if (!segment.getData().getManeuverBlocks().isEmpty()) {
             for (final OrbitManeuverHistory maneuver : segment.getData().getManeuverBlocks()) {
                 // write optional maneuver block
                 new OrbitManeuverHistoryWriter(maneuver, getTimeConverter()).write(generator);
             }
         }
 
         if (segment.getData().getPerturbationsBlock().isPresent()) {
             // write optional perturbation parameters block
             new PerturbationsWriter(segment.getData().getPerturbationsBlock().get(), getTimeConverter()).
             write(generator);
         }
 
         if (segment.getData().getOrbitDeterminationBlock().isPresent()) {
             // write optional orbit determination block
             new OrbitDeterminationWriter(segment.getData().getOrbitDeterminationBlock().get(), getTimeConverter()).
             write(generator);
         }
 
         if (segment.getData().getUserDefinedBlock().isPresent()) {
             // write optional user defined parameters block
             new UserDefinedWriter(OcmDataSubStructureKey.user.name(),
                                   OcmDataSubStructureKey.USER.name(),
                                   segment.getData().getUserDefinedBlock().get()).
             write(generator);
         }
 
         // stop data block
         if (generator.getFormat() == FileFormat.XML) {
             generator.exitSection();
         }
 
     }
 
 }