/* Copyright 2022-2025 Luc Maisonobe
    * 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.acm;
  
  import java.io.IOException;
  import java.util.Collections;
  import java.util.List;
  
  import org.orekit.files.ccsds.definitions.TimeConverter;
  import org.orekit.files.ccsds.section.AbstractWriter;
  import org.orekit.files.ccsds.utils.FileFormat;
  import org.orekit.files.ccsds.utils.generation.Generator;
  import org.orekit.utils.units.Unit;
  
  /** Writer for attitude state history data.
   * @author Luc Maisonobe
   * @since 12.0
   */
  class AttitudeStateHistoryWriter extends AbstractWriter {
  
      /** Attitude state history block. */
      private final AttitudeStateHistory history;
  
      /** Converter for dates. */
      private final TimeConverter timeConverter;
  
      /** Create a writer.
       * @param attitudeStateHistory trajectory state history to write
       * @param timeConverter converter for dates
       */
      AttitudeStateHistoryWriter(final AttitudeStateHistory attitudeStateHistory,
                                 final TimeConverter timeConverter) {
          super(AcmDataSubStructureKey.att.name(), AcmDataSubStructureKey.ATT.name());
          this.history       = attitudeStateHistory;
          this.timeConverter = timeConverter;
      }
  
      /** {@inheritDoc} */
      @Override
      protected void writeContent(final Generator generator) throws IOException {
  
          // trajectory state history block
          final AttitudeStateHistoryMetadata metadata = history.getMetadata();
          generator.writeComments(metadata.getComments());
  
          // identifiers
          generator.writeEntry(AttitudeStateHistoryMetadataKey.ATT_ID.name(),       metadata.getAttID(),      null, false);
          generator.writeEntry(AttitudeStateHistoryMetadataKey.ATT_PREV_ID.name(),  metadata.getAttPrevID(),  null, false);
          generator.writeEntry(AttitudeStateHistoryMetadataKey.ATT_BASIS.name(),    metadata.getAttBasis(),   null, false);
          generator.writeEntry(AttitudeStateHistoryMetadataKey.ATT_BASIS_ID.name(), metadata.getAttBasisID(), null, false);
  
          // references
          generator.writeEntry(AttitudeStateHistoryMetadataKey.REF_FRAME_A.name(),  metadata.getEndpoints().getFrameA().getName(),  null, true);
          generator.writeEntry(AttitudeStateHistoryMetadataKey.REF_FRAME_B.name(),  metadata.getEndpoints().getFrameB().getName(),  null, true);
  
          // types
          if (metadata.getAttitudeType() == AttitudeElementsType.EULER_ANGLES) {
              generator.writeEntry(AttitudeStateHistoryMetadataKey.EULER_ROT_SEQ.name(), metadata.getEulerRotSeq(), true);
          }
          generator.writeEntry(AttitudeStateHistoryMetadataKey.NUMBER_STATES.name(), metadata.getNbStates(),     true);
          generator.writeEntry(AttitudeStateHistoryMetadataKey.ATT_TYPE.name(),      metadata.getAttitudeType(), true);
          if (metadata.getRateType() != null) {
              generator.writeEntry(AttitudeStateHistoryMetadataKey.RATE_TYPE.name(), metadata.getRateType(),     true);
          }
  
          // data
          final List<Unit> attUnits  = metadata.getAttitudeType().getUnits();
          final List<Unit> rateUnits = metadata.getRateType() == null ?
                                       Collections.emptyList() : metadata.getRateType().getUnits();
          for (final AttitudeState state : history.getAttitudeStates()) {
              final double[]      elements = state.getElements();
              final StringBuilder line     = new StringBuilder();
              line.append(generator.dateToString(timeConverter, state.getDate()));
              for (int i = 0; i < attUnits.size(); ++i) {
                  line.append(' ');
                  line.append(generator.doubleToString(attUnits.get(i).fromSI(elements[i])));
              }
              for (int i = 0; i < rateUnits.size(); ++i) {
                  line.append(' ');
                  line.append(generator.doubleToString(rateUnits.get(i).fromSI(elements[attUnits.size() + i])));
              }
              if (generator.getFormat() == FileFormat.XML) {
                  generator.writeEntry(Acm.ATT_LINE, line.toString(), null, true);
              } else {
                 generator.writeRawData(line);
                 generator.newLine();
             }
         }
 
     }
 
 }