/* 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.forces.maneuvers;
  
  import org.hipparchus.CalculusFieldElement;
  import org.hipparchus.Field;
  import org.hipparchus.analysis.differentiation.Gradient;
  import org.hipparchus.analysis.differentiation.GradientField;
  import org.hipparchus.complex.Complex;
  import org.hipparchus.complex.ComplexField;
  import org.hipparchus.geometry.euclidean.threed.FieldVector3D;
  import org.hipparchus.geometry.euclidean.threed.Vector3D;
  import org.hipparchus.util.Binary64;
  import org.hipparchus.util.Binary64Field;
  import org.hipparchus.util.MathArrays;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.DisplayName;
  import org.junit.jupiter.api.Test;
  import org.mockito.Mockito;
  import org.orekit.attitudes.*;
  import org.orekit.forces.maneuvers.propulsion.BasicConstantThrustPropulsionModel;
  import org.orekit.forces.maneuvers.propulsion.PropulsionModel;
  import org.orekit.forces.maneuvers.propulsion.ThrustPropulsionModel;
  import org.orekit.forces.maneuvers.trigger.DateBasedManeuverTriggers;
  import org.orekit.forces.maneuvers.trigger.ManeuverTriggers;
  import org.orekit.frames.Frame;
  import org.orekit.frames.FramesFactory;
  import org.orekit.orbits.CartesianOrbit;
  import org.orekit.propagation.FieldSpacecraftState;
  import org.orekit.propagation.SpacecraftState;
  import org.orekit.time.AbsoluteDate;
  import org.orekit.time.FieldAbsoluteDate;
  import org.orekit.utils.PVCoordinates;
  import org.orekit.utils.ParameterDriver;
  
  import java.util.ArrayList;
  import java.util.List;
  
  class ManeuverTest {
  
      @Test
      void testGetName() {
          // GIVEN
          final String tooShortName = "a";
          final String expectedName = "aa";
          final double arbitraryDuration = 0.;
          final DateBasedManeuverTriggers triggers = new DateBasedManeuverTriggers(tooShortName, AbsoluteDate.ARBITRARY_EPOCH, arbitraryDuration);
          final double arbitraryThrust = 1.;
          final double arbitraryIsp = 1.;
          final PropulsionModel propulsion = new BasicConstantThrustPropulsionModel(arbitraryThrust, arbitraryIsp, Vector3D.PLUS_I, expectedName);
          // WHEN
          final Maneuver maneuver = new Maneuver(null, triggers, propulsion);
          final String actualName = maneuver.getName();
          // THEN
          Assertions.assertEquals(expectedName, actualName);
      }
  
      @Test
      void testGetParametersDrivers() {
          // GIVEN
          final ManeuverTriggers mockedTriggers = Mockito.mock(ManeuverTriggers.class);
          final PropulsionModel mockedPropulsion = Mockito.mock(PropulsionModel.class);
          final AttitudeProvider mocedkAttitudeProvider = Mockito.mock(AttitudeProvider.class);
          final List<ParameterDriver> driverList = new ArrayList<>();
          driverList.add(Mockito.mock(ParameterDriver.class));
          Mockito.when(mocedkAttitudeProvider.getParametersDrivers()).thenReturn(driverList);
          // WHEN
          final Maneuver maneuver = new Maneuver(mocedkAttitudeProvider, mockedTriggers, mockedPropulsion);
          final List<ParameterDriver> actualDrivers = maneuver.getParametersDrivers();
          // THEN
          Assertions.assertEquals(driverList.size(), actualDrivers.size());
      }
  
      @Test
      void testGetMassDerivativeNotFiring() {
          // GIVEN
          final ManeuverTriggers mockedTriggers = Mockito.mock(ManeuverTriggers.class);
          final double[] array = new double[0];
          final AbsoluteDate date = AbsoluteDate.ARBITRARY_EPOCH;
          Mockito.when(mockedTriggers.isFiring(date, array)).thenReturn(false);
          final PropulsionModel mockedPropulsion = Mockito.mock(PropulsionModel.class);
          final SpacecraftState mockedState = Mockito.mock();
          Mockito.when(mockedState.getDate()).thenReturn(date);
          // WHEN
          final Maneuver maneuver = new Maneuver(null, mockedTriggers, mockedPropulsion);
         final double rate = maneuver.getMassDerivative(mockedState, array);
         // THEN
         Assertions.assertEquals(0, rate);
     }
 
     @Test
     void testFieldGetMassDerivativeNotFiring() {
         // GIVEN
         final ManeuverTriggers mockedTriggers = Mockito.mock(ManeuverTriggers.class);
         final Binary64[] array = new Binary64[0];
         final FieldAbsoluteDate<Binary64> date = FieldAbsoluteDate.getArbitraryEpoch(Binary64Field.getInstance());
         Mockito.when(mockedTriggers.isFiring(date, array)).thenReturn(false);
         final PropulsionModel mockedPropulsion = Mockito.mock(PropulsionModel.class);
         @SuppressWarnings("unchecked")
         final FieldSpacecraftState<Binary64> mockedState = Mockito.mock();
         Mockito.when(mockedState.getDate()).thenReturn(date);
         Mockito.when(mockedState.getMass()).thenReturn(Binary64.ONE);
         // WHEN
         final Maneuver maneuver = new Maneuver(null, mockedTriggers, mockedPropulsion);
         final Binary64 rate = maneuver.getMassDerivative(mockedState, array);
         // THEN
         Assertions.assertEquals(Binary64.ZERO, rate);
     }
 
     @Test
     void testGetControl3DVectorCostType() {
         // GIVEN
         final ManeuverTriggers mockedTriggers = Mockito.mock(ManeuverTriggers.class);
         final PropulsionModel mockedPropulsion = Mockito.mock(PropulsionModel.class);
         Mockito.when(mockedPropulsion.getControl3DVectorCostType()).thenReturn(Control3DVectorCostType.TWO_NORM);
         // WHEN
         final Maneuver maneuver = new Maneuver(null, mockedTriggers, mockedPropulsion);
         final Control3DVectorCostType actualCostType = maneuver.getControl3DVectorCostType();
         // THEN
         final Control3DVectorCostType expectedCostType = mockedPropulsion.getControl3DVectorCostType();
         Assertions.assertEquals(expectedCostType, actualCostType);
     }
 
     @Test
     @DisplayName("Test comparing Field acceleration w/ and w/o attitude override.")
     @SuppressWarnings("unchecked")
     void testAccelerationFieldAttitudeOverride() {
         // GIVEN
         final ComplexField field = ComplexField.getInstance();
 
         // mock triggers
         final ManeuverTriggers mockedTriggers = Mockito.mock(ManeuverTriggers.class);
         Mockito.when(mockedTriggers.isFiring(Mockito.any(AbsoluteDate.class), Mockito.any(double[].class))).
                 thenReturn(true);
         Mockito.when(mockedTriggers.isFiring(Mockito.any(FieldAbsoluteDate.class), Mockito.any(Complex[].class))).
                 thenReturn(true);
         Mockito.when(mockedTriggers.getParametersDrivers()).thenReturn(new ArrayList<>());
 
         // mock propulsion model
         final ThrustPropulsionModel mockedPropulsion = Mockito.mock(ThrustPropulsionModel.class);
         final Vector3D returnedVector = Vector3D.MINUS_I;
         final FieldVector3D<Complex> returnedFieldVector = new FieldVector3D<>(field, returnedVector);
         Mockito.when(mockedPropulsion.getAcceleration(Mockito.any(SpacecraftState.class), Mockito.any(Attitude.class),
                 Mockito.any(double[].class))).thenReturn(returnedVector);
         Mockito.when(mockedPropulsion.getAcceleration(Mockito.any(FieldSpacecraftState.class), Mockito.any(FieldAttitude.class),
                 Mockito.any(Complex[].class))).thenReturn(returnedFieldVector);
         Mockito.when(mockedPropulsion.getParametersDrivers()).thenReturn(new ArrayList<>());
 
         // create FieldSpacecraftState
         final int arbitraryNumber = 6;
         final AbsoluteDate epoch = AbsoluteDate.ARBITRARY_EPOCH;
         final Frame frame = FramesFactory.getGCRF();
         final FieldSpacecraftState<Complex> fieldState = createFieldState(field, frame, epoch);
 
         // create Maneuver
         final FrameAlignedProvider attitudeOverride = new FrameAlignedProvider(frame);
         final Maneuver maneuverWithOverride = new Maneuver(attitudeOverride, mockedTriggers, mockedPropulsion);
         final Complex[] fieldParameters = MathArrays.buildArray(field, arbitraryNumber);
         
         // WHEN
         final FieldVector3D<Complex> actualAcceleration = maneuverWithOverride.acceleration(fieldState, fieldParameters);
         
         // THEN
         final Maneuver maneuverWithoutOverride = new Maneuver(null, mockedTriggers, mockedPropulsion);
         Assertions.assertNotEquals(0., actualAcceleration.toVector3D().getNorm());
         final Vector3D expectedAcceleration = maneuverWithoutOverride.acceleration(fieldState.toSpacecraftState(),
                 new double[fieldParameters.length]);
         Assertions.assertEquals(expectedAcceleration, actualAcceleration.toVector3D());
         Assertions.assertEquals(returnedVector, actualAcceleration.toVector3D());
     }
 
     @Test
     @DisplayName("Test comparing Field acceleration to standard one.")
     @SuppressWarnings("unchecked")
     void testAccelerationField() {
         // GIVEN
         final GradientField field = GradientField.getField(1);
 
         // mock triggers
         final ManeuverTriggers mockedTriggers = Mockito.mock(ManeuverTriggers.class);
         Mockito.when(mockedTriggers.isFiring(Mockito.any(AbsoluteDate.class), Mockito.any(double[].class))).
                 thenReturn(true);
         Mockito.when(mockedTriggers.isFiring(Mockito.any(FieldAbsoluteDate.class), Mockito.any(Gradient[].class))).
                 thenReturn(true);
         Mockito.when(mockedTriggers.getParametersDrivers()).thenReturn(new ArrayList<>());
 
         // mock propulsion model
         final ThrustPropulsionModel mockedPropulsion = Mockito.mock(ThrustPropulsionModel.class);
         final Vector3D returnedVector = Vector3D.MINUS_I;
         final FieldVector3D<Gradient> returnedFieldVector = new FieldVector3D<>(field, returnedVector);
         Mockito.when(mockedPropulsion.getAcceleration(Mockito.any(SpacecraftState.class), Mockito.any(Attitude.class),
                         Mockito.any(double[].class))).thenReturn(returnedVector);
         Mockito.when(mockedPropulsion.getAcceleration(Mockito.any(FieldSpacecraftState.class), Mockito.any(FieldAttitude.class),
                 Mockito.any(Gradient[].class))).thenReturn(returnedFieldVector);
         Mockito.when(mockedPropulsion.getParametersDrivers()).thenReturn(new ArrayList<>());
 
         // create FieldSpacecraftState
         final int arbitraryNumber = 6;
         final AbsoluteDate epoch = AbsoluteDate.ARBITRARY_EPOCH;
         final FieldSpacecraftState<Gradient> fieldState = createFieldState(field, FramesFactory.getEME2000(), epoch);
 
         // create Maneuver
         final Maneuver maneuver = new Maneuver(null, mockedTriggers, mockedPropulsion);
         final Gradient[] fieldParameters = MathArrays.buildArray(field, arbitraryNumber);
         
         // WHEN
         final FieldVector3D<Gradient> acceleration = maneuver.acceleration(fieldState, fieldParameters);
         
         // THEN
         final Vector3D expectedAcceleration = maneuver.acceleration(fieldState.toSpacecraftState(), new double[arbitraryNumber]);
         Assertions.assertNotEquals(0., acceleration.toVector3D().getNorm());
         Assertions.assertEquals(expectedAcceleration, acceleration.toVector3D());
     }
 
     private <T extends CalculusFieldElement<T>> FieldSpacecraftState<T> createFieldState(final Field<T> field, 
                                                                                          final Frame frame, 
                                                                                          final AbsoluteDate epoch) {
         final double arbitraryMu = 1.;
         final PVCoordinates pvCoordinates = new PVCoordinates(Vector3D.PLUS_I, Vector3D.PLUS_J);
         final CartesianOrbit orbit = new CartesianOrbit(pvCoordinates, frame, epoch, arbitraryMu);
         final SpacecraftState state = new SpacecraftState(orbit);
         return new FieldSpacecraftState<>(field, state);
     }
 
     @Test
     void testGetAttitudeModelParametersNull() {
         final double[] parameters = new double[] {1};
         final Maneuver maneuver = new Maneuver(null, null, null);
         final double[] actualDrivers = maneuver.getAttitudeModelParameters(parameters);
         Assertions.assertArrayEquals(new double[0], actualDrivers);
     }
 
     @Test
     void testGetAttitudeModelParameters() {
         final AttitudeRotationModel mockedRotationModel = Mockito.mock(AttitudeRotationModel.class);
         final double[] parameters = new double[] {1};
         Mockito.when(mockedRotationModel.getParameters()).thenReturn(parameters);
         final List<ParameterDriver> drivers = new ArrayList<>();
         drivers.add(Mockito.mock(ParameterDriver.class));
         Mockito.when(mockedRotationModel.getParametersDrivers()).thenReturn(drivers);
         final Maneuver maneuver = new Maneuver(mockedRotationModel, null, null);
         final double[] actualDrivers = maneuver.getAttitudeModelParameters(parameters);
         Assertions.assertArrayEquals(parameters, actualDrivers);
     }
 
     @Test
     void testGetAttitudeModelParametersFieldNull() {
         final Binary64Field field = Binary64Field.getInstance();
         final Binary64[] parameters = MathArrays.buildArray(field, 1);
         parameters[0] = Binary64.ONE;
         final Maneuver maneuver = new Maneuver(null, null, null);
         final Binary64[] actualDrivers = maneuver.getAttitudeModelParameters(parameters);
         Assertions.assertEquals(0, actualDrivers.length);
     }
 
     @Test
     void testGetAttitudeModelParametersField() {
         final AttitudeRotationModel mockedRotationModel = Mockito.mock(AttitudeRotationModel.class);
         final Binary64Field field = Binary64Field.getInstance();
         final Binary64[] parameters = MathArrays.buildArray(field, 1);
         parameters[0] = Binary64.ONE;
         Mockito.when(mockedRotationModel.getParameters(field)).thenReturn(parameters);
         final List<ParameterDriver> drivers = new ArrayList<>();
         drivers.add(Mockito.mock(ParameterDriver.class));
         Mockito.when(mockedRotationModel.getParametersDrivers()).thenReturn(drivers);
         final Maneuver maneuver = new Maneuver(mockedRotationModel, null, null);
         final Binary64[] actualDrivers = maneuver.getAttitudeModelParameters(parameters);
         Assertions.assertArrayEquals(parameters, actualDrivers);
     }
 }