/* Copyright 2002-2021 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.adm.apm;
  
  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.adm.AdmMetadata;
  import org.orekit.files.ccsds.ndm.adm.AdmMetadataWriter;
  import org.orekit.files.ccsds.section.Header;
  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.time.AbsoluteDate;
  import org.orekit.utils.IERSConventions;
  
  
  /**
   * Writer for CCSDS Orbit Parameter Message.
   *
   * @author Luc Maisonobe
   * @since 11.0
   */
  public class ApmWriter extends AbstractMessageWriter<Header, Segment<AdmMetadata, ApmData>, Apm> {
  
      /** Version number implemented. **/
      public static final double CCSDS_APM_VERS = 1.0;
  
      /** Padding width for aligning the '=' sign. */
      public static final int KVN_PADDING_WIDTH = 17;
  
      /** Complete constructor.
       * <p>
       * Calling this constructor directly is not recommended. Users should rather use
       * {@link org.orekit.files.ccsds.ndm.WriterBuilder#buildApmWriter()
       * writerBuilder.buildOpmWriter()}.
       * </p>
       * @param conventions IERS Conventions
       * @param dataContext used to retrieve frames, time scales, etc.
       * @param missionReferenceDate reference date for Mission Elapsed Time or Mission Relative Time time systems
       */
      public ApmWriter(final IERSConventions conventions, final DataContext dataContext,
                       final AbsoluteDate missionReferenceDate) {
          super(Apm.ROOT, Apm.FORMAT_VERSION_KEY, CCSDS_APM_VERS,
                new ContextBinding(
                    () -> conventions,
                    () -> false, () -> dataContext, () -> ParsedUnitsBehavior.STRICT_COMPLIANCE,
                    () -> missionReferenceDate, () -> TimeSystem.UTC,
                    () -> 0.0, () -> 1.0));
      }
  
      /** {@inheritDoc} */
      @Override
      public void writeSegmentContent(final Generator generator, final double formatVersion,
                                      final Segment<AdmMetadata, ApmData> segment)
          throws IOException {
  
          // write the metadata
          final ContextBinding oldContext = getContext();
          final AdmMetadata    metadata   = segment.getMetadata();
          setContext(new ContextBinding(oldContext::getConventions,
                                        oldContext::isSimpleEOP,
                                        oldContext::getDataContext,
                                        oldContext::getParsedUnitsBehavior,
                                        oldContext::getReferenceDate,
                                        metadata::getTimeSystem,
                                        oldContext::getClockCount,
                                        oldContext::getClockRate));
          new AdmMetadataWriter(metadata).write(generator);
  
          // start data block
          if (generator.getFormat() == FileFormat.XML) {
              generator.enterSection(XmlStructureKey.data.name());
          }
  
          generator.writeComments(segment.getData().getComments());
  
          // write mandatory quaternion block
          new ApmQuaternionWriter(XmlSubStructureKey.quaternionState.name(), null,
                                  segment.getData().getQuaternionBlock(), getTimeConverter()).
         write(generator);
 
         if (segment.getData().getEulerBlock() != null) {
             // write optional Euler block for three axis stabilized satellites
             new EulerWriter(XmlSubStructureKey.eulerElementsThree.name(), null,
                             segment.getData().getEulerBlock()).
             write(generator);
         }
 
         if (segment.getData().getSpinStabilizedBlock() != null) {
             // write optional Euler block for spin stabilized satellites
             new SpinStabilizedWriter(XmlSubStructureKey.eulerElementsSpin.name(), null,
                                      segment.getData().getSpinStabilizedBlock()).
             write(generator);
         }
 
         if (segment.getData().getSpacecraftParametersBlock() != null) {
             // write optional spacecraft parameters block
             new SpacecraftParametersWriter(XmlSubStructureKey.spacecraftParameters.name(), null,
                                            segment.getData().getSpacecraftParametersBlock()).
             write(generator);
         }
 
         if (!segment.getData().getManeuvers().isEmpty()) {
             for (final Maneuver maneuver : segment.getData().getManeuvers()) {
                 // write optional maneuver block
                 new ManeuverWriter(XmlSubStructureKey.maneuverParameters.name(), null,
                                    maneuver, getTimeConverter()).write(generator);
             }
         }
 
         // stop data block
         if (generator.getFormat() == FileFormat.XML) {
             generator.exitSection();
         }
 
     }
 
 }