/* 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.propagation.integration;
  
  import org.hipparchus.CalculusFieldElement;
  import org.hipparchus.Field;
  import org.hipparchus.complex.Complex;
  import org.hipparchus.complex.ComplexField;
  import org.hipparchus.ode.FieldODEIntegrator;
  import org.hipparchus.ode.nonstiff.ClassicalRungeKuttaFieldIntegrator;
  import org.hipparchus.util.Binary64;
  import org.hipparchus.util.Binary64Field;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  import org.mockito.Mockito;
  import org.orekit.TestUtils;
  import org.orekit.attitudes.AttitudeProvider;
  import org.orekit.frames.Frame;
  import org.orekit.frames.FramesFactory;
  import org.orekit.orbits.EquinoctialOrbit;
  import org.orekit.orbits.FieldCartesianOrbit;
  import org.orekit.orbits.FieldEquinoctialOrbit;
  import org.orekit.orbits.FieldOrbit;
  import org.orekit.orbits.Orbit;
  import org.orekit.orbits.OrbitType;
  import org.orekit.orbits.PositionAngleType;
  import org.orekit.propagation.FieldSpacecraftState;
  import org.orekit.propagation.PropagationType;
  import org.orekit.propagation.events.EventDetectionSettings;
  import org.orekit.propagation.events.FieldDateDetector;
  import org.orekit.propagation.events.FieldEventDetectionSettings;
  import org.orekit.propagation.events.handlers.FieldEventHandler;
  import org.orekit.propagation.events.handlers.FieldResetDerivativesOnEvent;
  import org.orekit.propagation.numerical.FieldNumericalPropagator;
  import org.orekit.time.AbsoluteDate;
  import org.orekit.time.FieldAbsoluteDate;
  import org.orekit.utils.Constants;
  
  class FieldAbstractIntegratedPropagatorTest {
  
      @Test
      void testIntegrateWithResetDerivativesAndEvents() {
          // GIVEN
          final Orbit initialOrbit = TestUtils.getDefaultOrbit(AbsoluteDate.ARBITRARY_EPOCH);
          final Binary64Field field = Binary64Field.getInstance();
          final FieldOrbit<Binary64> fieldOrbit = new FieldCartesianOrbit<>(Binary64Field.getInstance(), initialOrbit);
          final FieldNumericalPropagator<Binary64> propagator = new FieldNumericalPropagator<>(field,
                  new ClassicalRungeKuttaFieldIntegrator<>(field,
                  fieldOrbit.getDate().getField().getZero().newInstance(100.)));
          propagator.setInitialState(new FieldSpacecraftState<>(fieldOrbit));
          final TestDetector detector = new TestDetector(fieldOrbit.getDate().shiftedBy(10.));
          propagator.addEventDetector(detector);
          // WHEN
          propagator.propagate(fieldOrbit.getDate().shiftedBy(100));
          // THEN
          Assertions.assertTrue(detector.resetted);
      }
  
      private static class TestDetector extends FieldDateDetector<Binary64> {
          boolean resetted = false;
  
          public TestDetector(FieldAbsoluteDate<Binary64> fieldAbsoluteDate) {
              super(fieldAbsoluteDate);
          }
  
          @Override
          public void reset(FieldSpacecraftState<Binary64> state, FieldAbsoluteDate<Binary64> target) {
              super.reset(state, target);
              resetted = true;
          }
  
          @Override
          public FieldEventHandler<Binary64> getHandler() {
              return new FieldResetDerivativesOnEvent<>();
          }
  
          @Override
          public FieldEventDetectionSettings<Binary64> getDetectionSettings() {
              return new FieldEventDetectionSettings<>(Binary64Field.getInstance(),
                      EventDetectionSettings.getDefaultEventDetectionSettings());
          }
      }
  
      @Test
      void testGetResetAtEndTrue() {
         testGetResetAtEnd(true);
     }
 
     @Test
     void testGetResetAtEndFalse() {
         testGetResetAtEnd(false);
     }
 
     void testGetResetAtEnd(final boolean expectedResetAtEnd) {
         // GIVEN
         final TestFieldAbstractIntegratedPropagator testAbstractIntegratedPropagator = new TestFieldAbstractIntegratedPropagator();
         // WHEN
         testAbstractIntegratedPropagator.setResetAtEnd(expectedResetAtEnd);
         // THEN
         final boolean actualResetAtEnd = testAbstractIntegratedPropagator.getResetAtEnd();
         Assertions.assertEquals(expectedResetAtEnd, actualResetAtEnd);
     }
     
     /** Test issue 1461.
      * <p>Test for the new generic method AbstractIntegratedPropagator.reset(SpacecraftState, PropagationType)
      */
     @Test
     void testIssue1461() {
         doTestIssue1461(Binary64Field.getInstance());
     }
     
     /** Method for running test for issue 1461. */
     private <T extends CalculusFieldElement<T>> void doTestIssue1461(Field<T> field) {
         // GIVEN
         
         final T zero = field.getZero();
         // GEO orbit
         final FieldOrbit<T> startOrbit = new FieldEquinoctialOrbit<>(field,
                         new EquinoctialOrbit(42165765.0, 0.0, 0.0, 0.0, 0.0, 0.0, PositionAngleType.TRUE,
                                              FramesFactory.getEME2000(), AbsoluteDate.J2000_EPOCH,
                                              Constants.IERS2010_EARTH_MU));
 
         // Init numerical propagator
         final FieldSpacecraftState<T> state = new FieldSpacecraftState<>(startOrbit);
         final FieldNumericalPropagator<T> propagator = new FieldNumericalPropagator<>(field,
                         new ClassicalRungeKuttaFieldIntegrator<T>(field, zero.newInstance(300.)));
         propagator.setInitialState(state);
 
         // WHEN
         propagator.resetInitialState(state, PropagationType.OSCULATING);
         final FieldSpacecraftState<T> oscState = propagator.getInitialState();
         
         propagator.resetInitialState(state, PropagationType.MEAN);
         final FieldSpacecraftState<T> meanState = propagator.getInitialState();
 
         // THEN
         
         // Check that all three states are identical
         final double dpOsc = oscState.getPosition().distance(state.getPosition()).getReal();
         final double dvOsc = oscState.getPVCoordinates().getVelocity().distance(state.getPVCoordinates().getVelocity()).getReal();
         
         final double dpMean = meanState.getPosition().distance(state.getPosition()).getReal();
         final double dvMean = meanState.getPVCoordinates().getVelocity().distance(state.getPVCoordinates().getVelocity()).getReal();
         
         Assertions.assertEquals(0., dpOsc, 0.);
         Assertions.assertEquals(0., dvOsc, 0.);
         Assertions.assertEquals(0., dpMean, 0.);
         Assertions.assertEquals(0., dvMean, 0.);
     }
 
     private static class TestFieldAbstractIntegratedPropagator extends FieldAbstractIntegratedPropagator<Complex> {
 
         @SuppressWarnings("unchecked")
         protected TestFieldAbstractIntegratedPropagator() {
             super(ComplexField.getInstance(), Mockito.mock(FieldODEIntegrator.class), PropagationType.OSCULATING);
         }
 
         @Override
         protected FieldStateMapper<Complex> createMapper(FieldAbsoluteDate<Complex> referenceDate, Complex mu,
                                                          OrbitType orbitType, PositionAngleType positionAngleType,
                                                          AttitudeProvider attitudeProvider, Frame frame) {
             return null;
         }
 
         @Override
         protected MainStateEquations<Complex> getMainStateEquations(FieldODEIntegrator<Complex> integ) {
             return null;
         }
     }
 
 }