/* 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.opm;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.Optional;
  
  import org.orekit.annotation.Nullable;
  import org.orekit.files.ccsds.ndm.odm.CartesianCovariance;
  import org.orekit.files.ccsds.ndm.odm.KeplerianElements;
  import org.orekit.files.ccsds.ndm.odm.KeplerianElementsKey;
  import org.orekit.files.ccsds.ndm.odm.SpacecraftParameters;
  import org.orekit.files.ccsds.ndm.odm.StateVector;
  import org.orekit.files.ccsds.ndm.odm.UserDefined;
  import org.orekit.files.ccsds.section.Data;
  import org.orekit.files.ccsds.utils.Initializer;
  
  /**
   * Container for Orbit Parameter Message data.
   * @author Luc Maisonobe
   * @since 11.0
   */
  public class OpmData implements Data {
  
      /** State vector block. */
      private final StateVector stateVectorBlock;
  
      /** Keplerian elements block. */
      @Nullable
      private final KeplerianElements keplerianElementsBlock;
  
      /** Spacecraft parameters block. */
      @Nullable
      private final SpacecraftParameters spacecraftParametersBlock;
  
      /** Covariance matrix logical block being read. */
      @Nullable
      private final CartesianCovariance covarianceBlock;
  
      /** Maneuvers. */
      private final List<Maneuver> maneuverBlocks;
  
      /** User defined parameters. */
      @Nullable
      private final UserDefined userDefinedBlock;
  
      /** Mass. */
      private final double mass;
  
      /** Simple constructor.
       * @param stateVectorBlock state vector logical block
       * @param keplerianElementsBlock Keplerian elements logical block (may be null)
       * @param spacecraftParametersBlock spacecraft parameters logical block (may be null)
       * @param covarianceBlock covariance matrix logical block (may be null)
       * @param maneuverBlocks maneuvers block list
       * @param userDefinedBlock user-defined logical block
       * @param mass mass (always defined, even if there is no {@code spacecraftParameters} block
       */
      public OpmData(final StateVector stateVectorBlock,
                     final KeplerianElements keplerianElementsBlock,
                     final SpacecraftParameters spacecraftParametersBlock,
                     final CartesianCovariance covarianceBlock,
                     final List<Maneuver> maneuverBlocks,
                     final UserDefined userDefinedBlock,
                     final double mass) {
          this.stateVectorBlock          = stateVectorBlock;
          this.keplerianElementsBlock    = keplerianElementsBlock;
          this.spacecraftParametersBlock = spacecraftParametersBlock;
          this.covarianceBlock           = covarianceBlock;
          this.maneuverBlocks            = Initializer.emptyListIfNull(maneuverBlocks);
          this.userDefinedBlock          = userDefinedBlock;
          this.mass                      = mass;
      }
  
      /** {@inheritDoc} */
      @Override
      public void validate(final double version) {
          stateVectorBlock.validate(version);
          if (keplerianElementsBlock != null) {
              keplerianElementsBlock.validate(version);
              // in OPM, only semi-major axis is allowed, not mean motion
              keplerianElementsBlock.checkNotNaN(keplerianElementsBlock.getA().orElse(Double.NaN),
                                                 KeplerianElementsKey.SEMI_MAJOR_AXIS.name());
          }
         if (spacecraftParametersBlock != null) {
             spacecraftParametersBlock.validate(version);
         }
         if (covarianceBlock != null) {
             covarianceBlock.setEpoch(stateVectorBlock.getEpoch());
             covarianceBlock.validate(version);
         }
         maneuverBlocks.forEach(maneuver -> maneuver.validate(version));
         if (userDefinedBlock != null) {
             userDefinedBlock.validate(version);
         }
     }
 
     /** Get the state vector logical block.
      * @return state vector block
      */
     public StateVector getStateVectorBlock() {
         return stateVectorBlock;
     }
 
     /** Get the Keplerian elements logical block.
      * @return Keplerian elements block
      */
     public Optional<KeplerianElements> getKeplerianElementsBlock() {
         return Optional.ofNullable(keplerianElementsBlock);
     }
 
     /** Get the spacecraft parameters logical block.
      * @return spacecraft parameters block
      */
     public Optional<SpacecraftParameters> getSpacecraftParametersBlock() {
         return Optional.ofNullable(spacecraftParametersBlock);
     }
 
     /** Get the covariance matrix logical block.
      * @return covariance matrix block
      */
     public Optional<CartesianCovariance> getCovarianceBlock() {
         return Optional.ofNullable(covarianceBlock);
     }
 
     /** Get the mass.
      * @return mass
      */
     public double getMass() {
         return mass;
     }
 
     /**
      * Get the number of maneuvers present in the APM.
      * @return the number of maneuvers
      */
     public int getNbManeuvers() {
         return maneuverBlocks.size();
     }
 
     /**
      * Get a list of all maneuvers.
      * @return unmodifiable list of all maneuvers.
      */
     public List<Maneuver> getManeuvers() {
         return Collections.unmodifiableList(maneuverBlocks);
     }
 
     /**
      * Get a maneuver.
      * @param index maneuver index, counting from 0
      * @return maneuver
      */
     public Maneuver getManeuver(final int index) {
         return maneuverBlocks.get(index);
     }
 
     /**
      * Get boolean testing whether the APM contains at least one maneuver.
      * @return true if APM contains at least one maneuver
      *         false otherwise
      */
     public boolean hasManeuvers() {
         return !maneuverBlocks.isEmpty();
     }
 
     /** Get the user defined parameters logical block.
      * @return user defined parameters block
      */
     public Optional<UserDefined> getUserDefinedBlock() {
         return Optional.ofNullable(userDefinedBlock);
     }
 
 }