/* 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.adjoint.cost;
  
  import org.hipparchus.geometry.euclidean.threed.Vector3D;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.params.ParameterizedTest;
  import org.junit.jupiter.params.provider.ValueSource;
  import org.mockito.Mockito;
  import org.orekit.errors.OrekitException;
  import org.orekit.errors.OrekitMessages;
  import org.orekit.propagation.events.EventDetectionSettings;
  
  class PenalizedCartesianFuelCostTest {
  
      @Test
      void testGetters() {
          // GIVEN
          final double expectedMagnitude = 1.;
          final double expectedEpsilon = 0.5;
          // WHEN
          final TestPenalizedCost penalizedCost = new TestPenalizedCost(expectedMagnitude, expectedEpsilon);
          // THEN
          Assertions.assertEquals(expectedEpsilon, penalizedCost.getEpsilon());
          Assertions.assertEquals(expectedMagnitude, penalizedCost.getMaximumThrustMagnitude());
      }
  
      @Test
      void testGetThrustDirection() {
          // GIVEN
          final double expectedMagnitude = 1.;
          final double expectedEpsilon = 0.5;
          final EventDetectionSettings expectedDetectionSettings = Mockito.mock(EventDetectionSettings.class);
          final TestPenalizedCost penalizedCost = new TestPenalizedCost(expectedMagnitude, expectedEpsilon);
          final double[] adjoint = new double[] {0, 0, 0, 1, 2, 3};
          // WHEN
          final Vector3D thrustDirection = penalizedCost.getThrustDirection(adjoint);
          // THEN
          Assertions.assertEquals(new Vector3D(adjoint[3], adjoint[4], adjoint[5]).normalize(), thrustDirection);
      }
  
      @ParameterizedTest
      @ValueSource(doubles = {-2, 2})
      void testExceptionConstructor(final double outOfBoundsEpsilon) {
          // GIVEN outOfBoundsEpsilon
          // WHEN & THEN
          final OrekitException exception = Assertions.assertThrows(OrekitException.class,
                  () -> new TestPenalizedCost(1, outOfBoundsEpsilon));
          Assertions.assertEquals(OrekitMessages.INVALID_PARAMETER_RANGE, exception.getSpecifier());
      }
  
      private static class TestPenalizedCost extends PenalizedCartesianFuelCost {
  
          protected TestPenalizedCost(double maximumThrustMagnitude, double epsilon) {
              super("", 0., maximumThrustMagnitude, epsilon);
          }
  
          @Override
          public double evaluatePenaltyFunction(double controlNorm) {
              return 0;
          }
  
          @Override
          public Vector3D getThrustAccelerationVector(double[] adjointVariables, double mass) {
              return null;
          }
  
          @Override
          public void updateAdjointDerivatives(double[] adjointVariables, double mass, double[] adjointDerivatives) {
              // not used
          }
      }
  }