/* 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.time;
  
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  
  class TimeIntervalTest {
  
      @Test
      void testOf() {
          // GIVEN
          final AbsoluteDate minDate = AbsoluteDate.ARBITRARY_EPOCH;
          final AbsoluteDate maxDate = minDate.shiftedBy(1);
          // WHEN
          final TimeInterval timeInterval = TimeInterval.of(maxDate, minDate);
          // THEN
          assertEquals(minDate, timeInterval.getStartDate());
          assertEquals(maxDate, timeInterval.getEndDate());
      }
  
      @Test
      void testContainsDate() {
          // GIVEN
          final AbsoluteDate minDate = AbsoluteDate.ARBITRARY_EPOCH;
          final AbsoluteDate maxDate = minDate.shiftedBy(1);
          final TimeInterval timeInterval = TimeInterval.of(maxDate, minDate);
          // WHEN & THEN
          assertFalse(timeInterval.contains(minDate.shiftedBy(-1)));
          assertTrue(timeInterval.contains(minDate));
          assertTrue(timeInterval.contains(minDate.shiftedBy(timeInterval.duration() / 2)));
          assertTrue(timeInterval.contains(maxDate));
          assertFalse(timeInterval.contains(maxDate.shiftedBy(2)));
      }
  
      @Test
      void testContainsInterval() {
          // GIVEN
          final AbsoluteDate minDate = AbsoluteDate.ARBITRARY_EPOCH;
          final AbsoluteDate maxDate = minDate.shiftedBy(1);
          final TimeInterval timeInterval = TimeInterval.of(maxDate, minDate);
          final TimeInterval allTimes = TimeInterval.of(AbsoluteDate.PAST_INFINITY, AbsoluteDate.FUTURE_INFINITY);
          // WHEN & THEN
          assertFalse(timeInterval.contains(TimeInterval.of(maxDate.shiftedBy(1), maxDate.shiftedBy(10))));
          assertFalse(timeInterval.contains(allTimes));
          assertFalse(timeInterval.contains(TimeInterval.of(AbsoluteDate.PAST_INFINITY, maxDate)));
          assertFalse(timeInterval.contains(TimeInterval.of(minDate, AbsoluteDate.FUTURE_INFINITY)));
          assertTrue(TimeInterval.of(AbsoluteDate.PAST_INFINITY, maxDate).contains(timeInterval));
          assertTrue(TimeInterval.of(minDate, AbsoluteDate.FUTURE_INFINITY).contains(timeInterval));
          assertTrue(allTimes.contains(timeInterval));
          assertTrue(timeInterval.contains(TimeInterval.of(minDate, minDate)));
          assertTrue(timeInterval.contains(TimeInterval.of(maxDate, maxDate)));
          assertTrue(timeInterval.contains(timeInterval));
          assertTrue(timeInterval.contains(TimeInterval.of(minDate.shiftedBy(0.5), maxDate.shiftedBy(-0.1))));
      }
  
      @Test
      void testIntersects() {
          // GIVEN
          final AbsoluteDate minDate = AbsoluteDate.ARBITRARY_EPOCH;
          final AbsoluteDate maxDate = minDate.shiftedBy(1);
          final TimeInterval timeInterval = TimeInterval.of(maxDate, minDate);
          final TimeInterval allTimes = TimeInterval.of(AbsoluteDate.PAST_INFINITY, AbsoluteDate.FUTURE_INFINITY);
          // WHEN & THEN
          assertFalse(timeInterval.intersects(TimeInterval.of(minDate.shiftedBy(-10), minDate.shiftedBy(-1))));
          assertFalse(timeInterval.intersects(TimeInterval.of(maxDate.shiftedBy(1), maxDate.shiftedBy(10))));
          assertTrue(timeInterval.intersects(allTimes));
          assertTrue(allTimes.intersects(timeInterval));
          assertTrue(timeInterval.intersects(timeInterval));
          assertTrue(timeInterval.intersects(TimeInterval.of(minDate, minDate)));
          assertTrue(timeInterval.intersects(TimeInterval.of(maxDate, maxDate)));
          assertTrue(timeInterval.intersects(TimeInterval.of(minDate.shiftedBy(0.1), maxDate.shiftedBy(-0.5))));
      }
  
      @Test
      void testDuration() {
          // GIVEN
          final AbsoluteDate minDate = AbsoluteDate.ARBITRARY_EPOCH;
          final double expectedDuration = 42;
          final AbsoluteDate maxDate = minDate.shiftedBy(expectedDuration);
          final TimeInterval timeInterval = TimeInterval.of(minDate, maxDate);
          // WHEN
         final double actualDuration = timeInterval.duration();
         // THEN
         assertEquals(expectedDuration, actualDuration);
     }
 }