/* 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.events.handlers;
  
  import org.hipparchus.complex.Complex;
  import org.hipparchus.complex.ComplexField;
  import org.hipparchus.ode.events.Action;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  import org.mockito.Mockito;
  import org.orekit.propagation.FieldSpacecraftState;
  import org.orekit.propagation.events.FieldEventDetector;
  import org.orekit.time.AbsoluteDate;
  import org.orekit.time.FieldAbsoluteDate;
  
  class FieldRecallLastOccurrenceTest {
  
      private static final Action ACTION = Action.CONTINUE;
  
      @Test
      void testEventOccurred() {
          // GIVEN
          final TestHandler testHandler = new TestHandler();
          final FieldRecallLastOccurrence<Complex> recallLastOccurrence = new FieldRecallLastOccurrence<>(testHandler);
          final FieldAbsoluteDate<Complex> expectedDate = FieldAbsoluteDate.getArbitraryEpoch(ComplexField.getInstance());
          final FieldSpacecraftState<Complex> mockedState = mockState(expectedDate);
          // WHEN
          final Action action = recallLastOccurrence.eventOccurred(mockedState, null, true);
          // THEN
          Assertions.assertEquals(expectedDate, recallLastOccurrence.getLastOccurrence());
          Assertions.assertEquals(ACTION, action);
      }
  
      @Test
      void testFinish() {
          // GIVEN
          final TestHandler testHandler = new TestHandler();
          final FieldRecallLastOccurrence<Complex> recallLastOccurrence = new FieldRecallLastOccurrence<>(testHandler);
          final FieldAbsoluteDate<Complex> expectedDate = FieldAbsoluteDate.getArbitraryEpoch(ComplexField.getInstance());
          final FieldSpacecraftState<Complex> mockedState = mockState(expectedDate);
          // WHEN
          recallLastOccurrence.finish(mockedState, null);
          // THEN
          Assertions.assertTrue(testHandler.isFinished);
      }
  
      @Test
      void testResetState() {
          // GIVEN
          final TestHandler testHandler = new TestHandler();
          final FieldRecallLastOccurrence<Complex> recallLastOccurrence = new FieldRecallLastOccurrence<>(testHandler);
          final FieldSpacecraftState<Complex> mockedState = mockState(FieldAbsoluteDate.getArbitraryEpoch(ComplexField.getInstance()));
          // WHEN
          final FieldSpacecraftState<Complex> actualState = recallLastOccurrence.resetState(null, mockedState);
          // THEN
          Assertions.assertEquals(mockedState, actualState);
          Assertions.assertNull(recallLastOccurrence.getLastOccurrence());
      }
  
      @Test
      void testInit() {
          // GIVEN
          final TestHandler testHandler = new TestHandler();
          final FieldRecallLastOccurrence<Complex> recallLastOccurrence = new FieldRecallLastOccurrence<>(testHandler);
          final FieldSpacecraftState<Complex> mockedState = mockState(new FieldAbsoluteDate<>(ComplexField.getInstance(),
              AbsoluteDate.FUTURE_INFINITY));
          // WHEN
          recallLastOccurrence.init(mockedState, FieldAbsoluteDate.getArbitraryEpoch(ComplexField.getInstance()), null);
          // THEN
          Assertions.assertTrue(testHandler.isInitialized);
      }
  
      @SuppressWarnings("unchecked")
      private FieldSpacecraftState<Complex> mockState(final FieldAbsoluteDate<Complex> date) {
          final FieldSpacecraftState<Complex> mockedState = Mockito.mock(FieldSpacecraftState.class);
          Mockito.when(mockedState.getDate()).thenReturn(date);
          return mockedState;
      }
  
      private static class TestHandler implements FieldEventHandler<Complex> {
  
          boolean isInitialized = false;
          boolean isFinished = false;
  
          @Override
         public void init(FieldSpacecraftState<Complex> initialState, FieldAbsoluteDate<Complex> target, FieldEventDetector<Complex> detector) {
             isInitialized = true;
         }
 
         @Override
         public Action eventOccurred(FieldSpacecraftState<Complex> s, FieldEventDetector<Complex> detector, boolean increasing) {
             return ACTION;
         }
 
         @Override
         public void finish(FieldSpacecraftState<Complex> finalState, FieldEventDetector<Complex> detector) {
             isFinished = true;
         }
     }
 
 }