/* Copyright 2022-2025 Romain Serra
    * 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.control.indirect.shooting;
  
  import org.hipparchus.CalculusFieldElement;
  import org.hipparchus.geometry.euclidean.threed.Vector3D;
  import org.hipparchus.ode.FieldOrdinaryDifferentialEquation;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  import org.mockito.Mockito;
  import org.orekit.control.indirect.shooting.propagation.AdjointDynamicsProvider;
  import org.orekit.control.indirect.shooting.propagation.ShootingIntegrationSettingsFactory;
  import org.orekit.control.indirect.shooting.propagation.ShootingPropagationSettings;
  import org.orekit.forces.ForceModel;
  import org.orekit.frames.FramesFactory;
  import org.orekit.orbits.CartesianOrbit;
  import org.orekit.orbits.OrbitType;
  import org.orekit.propagation.SpacecraftState;
  import org.orekit.propagation.integration.AdditionalDerivativesProvider;
  import org.orekit.propagation.numerical.NumericalPropagator;
  import org.orekit.time.AbsoluteDate;
  import org.orekit.time.FieldAbsoluteDate;
  import org.orekit.utils.AbsolutePVCoordinates;
  import org.orekit.utils.Constants;
  import org.orekit.utils.PVCoordinates;
  import org.orekit.utils.TimeStampedPVCoordinates;
  
  import java.util.ArrayList;
  import java.util.List;
  
  class AbstractIndirectShootingTest {
  
      @Test
      void testBuildPropagatorOrbit() {
          // GIVEN
          final TestShooting testShooting = new TestShooting(createSettings());
          final SpacecraftState state = new SpacecraftState(createOrbit());
          // WHEN
          final NumericalPropagator propagator = testShooting.buildPropagator(state);
          // THEN
          Assertions.assertEquals(OrbitType.CARTESIAN, propagator.getOrbitType());
          Assertions.assertEquals(state.getDate(), propagator.getInitialState().getDate());
          Assertions.assertEquals(state.getPosition(propagator.getFrame()), propagator.getInitialState().getPosition());
      }
  
      @Test
      void testBuildPropagator() {
          // GIVEN
          final TestShooting testShooting = new TestShooting(createSettings());
          final CartesianOrbit orbit = createOrbit();
          final SpacecraftState state = new SpacecraftState(new AbsolutePVCoordinates(orbit.getFrame(),
                  orbit.getDate(), orbit.getPVCoordinates()));
          // WHEN
          final NumericalPropagator propagator = testShooting.buildPropagator(state);
          // THEN
          Assertions.assertEquals(state.getDate(), propagator.getInitialState().getDate());
          Assertions.assertEquals(state.getPosition(propagator.getFrame()), propagator.getInitialState().getPosition());
      }
  
      private ShootingPropagationSettings createSettings() {
          final List<ForceModel> forceModelList = new ArrayList<>();
          final ForceModel mockedForceModel = Mockito.mock(ForceModel.class);
          forceModelList.add(mockedForceModel);
          final AdjointDynamicsProvider adjointDynamicsProvider = Mockito.mock(AdjointDynamicsProvider.class);
          Mockito.when(adjointDynamicsProvider.buildAdditionalDerivativesProvider())
                  .thenReturn(Mockito.mock(AdditionalDerivativesProvider.class));
          return new ShootingPropagationSettings(forceModelList, adjointDynamicsProvider,
                  ShootingIntegrationSettingsFactory.getClassicalRungeKuttaIntegratorSettings(1.));
      }
  
      private static CartesianOrbit createOrbit() {
          return new CartesianOrbit(new TimeStampedPVCoordinates(AbsoluteDate.ARBITRARY_EPOCH,
                  new PVCoordinates(Vector3D.MINUS_J.scalarMultiply(1e6), Vector3D.MINUS_K.scalarMultiply(10))),
                  FramesFactory.getGCRF(), Constants.EGM96_EARTH_MU);
      }
  
      private static class TestShooting extends AbstractIndirectShooting {
  
          public TestShooting(ShootingPropagationSettings propagationSettings) {
              super(propagationSettings);
          }
  
          @Override
          public ShootingBoundaryOutput solve(double initialMass, double[] initialGuess) {
              return null;
         }
     }
 
 }