/* 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.orbits;
  
  import org.hipparchus.complex.Complex;
  import org.hipparchus.util.Binary64;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.params.ParameterizedTest;
  import org.junit.jupiter.params.provider.EnumSource;
  import org.junit.jupiter.params.provider.ValueSource;
  import org.orekit.errors.OrekitException;
  import org.orekit.errors.OrekitMessages;
  
  class FieldEquinoctialLongitudeArgumentUtilityTest {
  
      private static final Complex EX = new Complex(0.1, 0.);
      private static final Complex EY = new Complex(0.66, 0.);
      private static final double TOLERANCE = 1e-10;
  
      @Test
      void testMeanToTrueAndBack() {
          // GIVEN
          final Complex expectedLatitudeArgument = new Complex(3., 0.);
          // WHEN
          final Complex intermediateLatitudeArgument = FieldEquinoctialLongitudeArgumentUtility.meanToTrue(
                  EX, EY, expectedLatitudeArgument);
          final Complex actualLatitudeArgument = FieldEquinoctialLongitudeArgumentUtility.trueToMean(
                  EX, EY, intermediateLatitudeArgument);
          // THEN
          Assertions.assertEquals(expectedLatitudeArgument.getReal(), actualLatitudeArgument.getReal(), TOLERANCE);
      }
  
      @Test
      void testEccentricToTrueAndBack() {
          // GIVEN
          final Complex expectedLatitudeArgument = new Complex(3., 0.);
          // WHEN
          final Complex intermediateLatitudeArgument = FieldEquinoctialLongitudeArgumentUtility
                  .eccentricToTrue(EX, EY, expectedLatitudeArgument);
          final Complex actualLatitudeArgument = FieldEquinoctialLongitudeArgumentUtility
                  .trueToEccentric(EX, EY, intermediateLatitudeArgument);
          // THEN
          Assertions.assertEquals(expectedLatitudeArgument.getReal(), actualLatitudeArgument.getReal(), TOLERANCE);
      }
  
      @Test
      void testEccentricToMeanAndBack() {
          // GIVEN
          final Complex expectedLatitudeArgument = new Complex(3., 0.);
          // WHEN
          final Complex intermediateLatitudeArgument = FieldEquinoctialLongitudeArgumentUtility
                  .eccentricToMean(EX, EY, expectedLatitudeArgument);
          final Complex actualLatitudeArgument = FieldEquinoctialLongitudeArgumentUtility
                  .meanToEccentric(EX, EY, intermediateLatitudeArgument);
          // THEN
          Assertions.assertEquals(expectedLatitudeArgument.getReal(), actualLatitudeArgument.getReal(), TOLERANCE);
      }
  
      @Test
      void testMeanToTrueVersusDouble() {
          // GIVEN
          final Complex fieldOriginalPositionAngle = new Complex(3., 0.);
          // WHEN
          final double actualConvertedPositionAngle = FieldEquinoctialLongitudeArgumentUtility.meanToTrue(
                  EX, EY, fieldOriginalPositionAngle).getReal();
          // THEN
          final double expectedPositionAngle = CircularLatitudeArgumentUtility.meanToTrue(
                  EX.getReal(), EY.getReal(), fieldOriginalPositionAngle.getReal());
          Assertions.assertEquals(expectedPositionAngle, actualConvertedPositionAngle, TOLERANCE);
      }
  
      @Test
      void testMeanToEccentricVersusDouble() {
          // GIVEN
          final Complex fieldOriginalPositionAngle = new Complex(3., 0.);
          // WHEN
          final double actualConvertedPositionAngle = FieldEquinoctialLongitudeArgumentUtility.meanToEccentric(
                  EX, EY, fieldOriginalPositionAngle).getReal();
          // THEN
          final double expectedPositionAngle = CircularLatitudeArgumentUtility.meanToEccentric(
                  EX.getReal(), EY.getReal(), fieldOriginalPositionAngle.getReal());
          Assertions.assertEquals(expectedPositionAngle, actualConvertedPositionAngle, TOLERANCE);
      }
  
     @Test
     void testTrueToEccentricVersusDouble() {
         // GIVEN
         final Complex fieldOriginalPositionAngle = new Complex(3., 0.);
         // WHEN
         final double actualConvertedPositionAngle = FieldEquinoctialLongitudeArgumentUtility.trueToEccentric(
                 EX, EY, fieldOriginalPositionAngle).getReal();
         // THEN
         final double expectedPositionAngle = CircularLatitudeArgumentUtility.trueToEccentric(
                 EX.getReal(), EY.getReal(), fieldOriginalPositionAngle.getReal());
         Assertions.assertEquals(expectedPositionAngle, actualConvertedPositionAngle, TOLERANCE);
     }
 
     @Test
     void testTrueToMeanVersusDouble() {
         // GIVEN
         final Complex fieldOriginalPositionAngle = new Complex(3., 0.);
         // WHEN
         final double actualConvertedPositionAngle = FieldEquinoctialLongitudeArgumentUtility.trueToMean(
                 EX, EY, fieldOriginalPositionAngle).getReal();
         // THEN
         final double expectedPositionAngle = CircularLatitudeArgumentUtility.trueToMean(
                 EX.getReal(), EY.getReal(), fieldOriginalPositionAngle.getReal());
         Assertions.assertEquals(expectedPositionAngle, actualConvertedPositionAngle, TOLERANCE);
     }
 
     @Test
     void testEccentricToMeanVersusDouble() {
         // GIVEN
         final Complex fieldOriginalPositionAngle = new Complex(3., 0.);
         // WHEN
         final double actualConvertedPositionAngle = FieldEquinoctialLongitudeArgumentUtility.eccentricToMean(
                 EX, EY, fieldOriginalPositionAngle).getReal();
         // THEN
         final double expectedPositionAngle = CircularLatitudeArgumentUtility.eccentricToMean(
                 EX.getReal(), EY.getReal(), fieldOriginalPositionAngle.getReal());
         Assertions.assertEquals(expectedPositionAngle, actualConvertedPositionAngle, TOLERANCE);
     }
 
     @Test
     void testEccentricToTrueVersusDouble() {
         // GIVEN
         final Complex fieldOriginalPositionAngle = new Complex(3., 0.);
         // WHEN
         final double actualConvertedPositionAngle = FieldEquinoctialLongitudeArgumentUtility.eccentricToTrue(
                 EX, EY, fieldOriginalPositionAngle).getReal();
         // THEN
         final double expectedPositionAngle = CircularLatitudeArgumentUtility.eccentricToTrue(
                 EX.getReal(), EY.getReal(), fieldOriginalPositionAngle.getReal());
         Assertions.assertEquals(expectedPositionAngle, actualConvertedPositionAngle, TOLERANCE);
     }
 
     @Test
     void testMeanToEccentricException() {
         // GIVEN
         final Complex fieldNaNPositionAngle = Complex.NaN;
         // WHEN & THEN
         Assertions.assertThrows(OrekitException.class, () -> FieldEquinoctialLongitudeArgumentUtility.meanToEccentric(EX,
                 EY, fieldNaNPositionAngle), OrekitMessages.UNABLE_TO_COMPUTE_ECCENTRIC_LONGITUDE_ARGUMENT.toString());
     }
 
     @ParameterizedTest
     @EnumSource(PositionAngleType.class)
     void testConvertLVersusDouble(final PositionAngleType positionAngleType) {
         // GIVEN
         final Complex fieldOriginalPositionAngle = new Complex(3., 0.);
         final PositionAngleType outputType = PositionAngleType.ECCENTRIC;
         // WHEN
         final double actualConvertedPositionAngle = FieldEquinoctialLongitudeArgumentUtility.convertL(positionAngleType,
                 fieldOriginalPositionAngle, EX, EY, outputType).getReal();
         // THEN
         final double expectedPositionAngle = EquinoctialLongitudeArgumentUtility.convertL(positionAngleType,
                 fieldOriginalPositionAngle.getReal(), EX.getReal(), EY.getReal(), outputType);
         Assertions.assertEquals(expectedPositionAngle, actualConvertedPositionAngle, TOLERANCE);
     }
 
     @ParameterizedTest
     @ValueSource(doubles = {1e3, 5e3, 1e4, 1e5, 5e5})
     void testIssue1525(final double alphaM) {
         final double ex = 0.44940492906694396;
         final double ey = 0.56419162961687;
         final Binary64 zero = Binary64.ZERO;
         Assertions.assertDoesNotThrow(() -> FieldEquinoctialLongitudeArgumentUtility
                 .meanToEccentric(zero.newInstance(ex), zero.newInstance(ey), zero.newInstance(alphaM)));
     }
 
 }