/* 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.ode.events.Action;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  import org.mockito.Mockito;
  import org.orekit.propagation.SpacecraftState;
  import org.orekit.propagation.events.EventDetector;
  import org.orekit.time.AbsoluteDate;
  
  class RecallLastOccurrenceTest {
  
      private static final Action ACTION = Action.CONTINUE;
  
      @Test
      void testFinish() {
          // GIVEN
          final EventHandler mockedHandler = Mockito.mock(EventHandler.class);
          final RecallLastOccurrence wrappingHandler = new RecallLastOccurrence(mockedHandler);
          final SpacecraftState mockedState = Mockito.mock(SpacecraftState.class);
          // WHEN
          wrappingHandler.finish(mockedState, null);
          // THEN
          Mockito.verify(mockedHandler, Mockito.times(1)).finish(mockedState, null);
      }
  
      @Test
      void testEventOccurred() {
          // GIVEN
          final TestHandler testHandler = new TestHandler();
          final RecallLastOccurrence recallLastOccurrence = new RecallLastOccurrence(testHandler);
          final AbsoluteDate expectedDate = AbsoluteDate.J2000_EPOCH;
          final SpacecraftState mockedState = mockState(expectedDate);
          // WHEN
          final Action action = recallLastOccurrence.eventOccurred(mockedState, null, true);
          // THEN
          Assertions.assertEquals(expectedDate, recallLastOccurrence.getLastOccurrence());
          Assertions.assertEquals(ACTION, action);
      }
  
      @Test
      void testResetState() {
          // GIVEN
          final TestHandler testHandler = new TestHandler();
          final RecallLastOccurrence recallLastOccurrence = new RecallLastOccurrence(testHandler);
          final SpacecraftState mockedState = mockState(AbsoluteDate.ARBITRARY_EPOCH);
          // WHEN
          final SpacecraftState actualState = recallLastOccurrence.resetState(null, mockedState);
          // THEN
          Assertions.assertEquals(mockedState, actualState);
          Assertions.assertNull(recallLastOccurrence.getLastOccurrence());
      }
  
      @Test
      void testInitBackward() {
          // GIVEN
          final TestHandler testHandler = new TestHandler();
          final RecallLastOccurrence recallLastOccurrence = new RecallLastOccurrence(testHandler);
          final SpacecraftState mockedState = mockState(AbsoluteDate.FUTURE_INFINITY);
          // WHEN
          recallLastOccurrence.init(mockedState, AbsoluteDate.ARBITRARY_EPOCH, null);
          // THEN
          Assertions.assertTrue(testHandler.isInitialized);
          Assertions.assertEquals(AbsoluteDate.FUTURE_INFINITY, recallLastOccurrence.getLastOccurrence());
      }
  
      @Test
      void testInitForward() {
          // GIVEN
          final TestHandler testHandler = new TestHandler();
          final RecallLastOccurrence recallLastOccurrence = new RecallLastOccurrence(testHandler);
          final SpacecraftState mockedState = mockState(AbsoluteDate.PAST_INFINITY);
          // WHEN
          recallLastOccurrence.init(mockedState, AbsoluteDate.ARBITRARY_EPOCH, null);
          // THEN
          Assertions.assertTrue(testHandler.isInitialized);
          Assertions.assertEquals(AbsoluteDate.PAST_INFINITY, recallLastOccurrence.getLastOccurrence());
      }
  
      private SpacecraftState mockState(final AbsoluteDate date) {
          final SpacecraftState mockedState = Mockito.mock(SpacecraftState.class);
          Mockito.when(mockedState.getDate()).thenReturn(date);
          return mockedState;
     }
 
     private static class TestHandler implements EventHandler {
 
         boolean isInitialized = false;
 
         boolean isFinished = false;
 
         @Override
         public void init(SpacecraftState initialState, AbsoluteDate target, EventDetector detector) {
             isInitialized = true;
         }
 
         @Override
         public Action eventOccurred(SpacecraftState s, EventDetector detector, boolean increasing) {
             return ACTION;
         }
 
         @Override
         public void finish(SpacecraftState finalState, EventDetector detector) {
             isFinished = true;
         }
     }
 
 }