/* Copyright 2002-2025 CS GROUP
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    * contributor license agreements.  See the NOTICE file distributed with
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    * 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,
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   * See the License for the specific language governing permissions and
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  package org.orekit.propagation.events;
  
  import org.hamcrest.CoreMatchers;
  import org.hamcrest.MatcherAssert;
  import org.hipparchus.CalculusFieldElement;
  import org.hipparchus.Field;
  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.propagation.FieldSpacecraftState;
  import org.orekit.time.FieldAbsoluteDate;
  
  /**
   * Unit tests for {@link FieldNegateDetector}.
   *
   * @author Evan Ward
   */
  class FieldNegateDetectorTest {
  
      @Test
      void testGetDetector() {
          // GIVEN
          final FieldDateDetector<Binary64> expectedDetector = new FieldDateDetector<>(FieldAbsoluteDate.getArbitraryEpoch(Binary64Field.getInstance()));
          
          // WHEN
          final FieldNegateDetector<Binary64> negateDetector = new FieldNegateDetector<>(expectedDetector);
          
          // THEN
          Assertions.assertEquals(expectedDetector, negateDetector.getDetector());
          Assertions.assertEquals(expectedDetector, negateDetector.getOriginal());
      }
  
      /**
       * check g function is negated.
       */
      @Test
      void testG() {
          doTestG(Binary64Field.getInstance());
      }
  
      private <T extends CalculusFieldElement<T>> void doTestG(final Field<T> field) {
          //setup
          @SuppressWarnings("unchecked")
          FieldEventDetector<T> a = Mockito.mock(FieldEventDetector.class);
          Mockito.when(a.getDetectionSettings()).thenReturn(new FieldEventDetectionSettings<>(field,
                  EventDetectionSettings.getDefaultEventDetectionSettings()));
          FieldNegateDetector<T> detector = new FieldNegateDetector<>(a);
          @SuppressWarnings("unchecked")
          FieldSpacecraftState<T> s = Mockito.mock(FieldSpacecraftState.class);
  
          // verify + to -
          Mockito.when(a.g(s)).thenReturn(field.getZero().newInstance(1.0));
          MatcherAssert.assertThat(detector.g(s).getReal(), CoreMatchers.is(-1.0));
          // verify - to +
          Mockito.when(a.g(s)).thenReturn(field.getZero().newInstance(-1.0));
          MatcherAssert.assertThat(detector.g(s).getReal(), CoreMatchers.is(1.0));
      }
  
      /** Check a with___ method. */
      @Test
      void testCreate() {
          doTestCreate(Binary64Field.getInstance());
      }
  
      private <T extends CalculusFieldElement<T>> void doTestCreate(final Field<T> field) {
          //setup
          @SuppressWarnings("unchecked")
          FieldEventDetector<T> a = Mockito.mock(FieldEventDetector.class);
          Mockito.when(a.getDetectionSettings()).thenReturn(new FieldEventDetectionSettings<>(field,
                  EventDetectionSettings.getDefaultEventDetectionSettings()));
          FieldNegateDetector<T> detector = new FieldNegateDetector<>(a);
  
          // action
          FieldNegateDetector<T> actual = detector.withMaxCheck(100);
  
          //verify
          MatcherAssert.assertThat(actual.getMaxCheckInterval().currentInterval(null, true), CoreMatchers.is(100.0));
          Assertions.assertTrue(actual.getOriginal() == a);
      }
  }