/* 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.forces.maneuvers.trigger;
  
  import org.hipparchus.CalculusFieldElement;
  import org.hipparchus.Field;
  import org.orekit.propagation.events.BooleanDetector;
  import org.orekit.propagation.events.FieldBooleanDetector;
  import org.orekit.propagation.events.FieldEventDetectionSettings;
  import org.orekit.propagation.events.FieldEventDetector;
  import org.orekit.propagation.events.FieldTimeIntervalDetector;
  import org.orekit.propagation.events.TimeIntervalDetector;
  import org.orekit.propagation.events.handlers.ContinueOnEvent;
  import org.orekit.propagation.events.handlers.EventHandler;
  import org.orekit.propagation.events.handlers.FieldContinueOnEvent;
  import org.orekit.propagation.events.handlers.FieldEventHandler;
  import org.orekit.propagation.events.intervals.AdaptableInterval;
  import org.orekit.propagation.events.intervals.DateDetectionAdaptableIntervalFactory;
  import org.orekit.time.TimeInterval;
  import org.orekit.time.TimeStamped;
  import org.orekit.utils.ParameterDriver;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  import java.util.stream.Collectors;
  
  /**
   * Maneuver trigger based on time intervals.
   *
   * @author Romain Serra
   * @since 13.1
   * @see TimeInterval
   * @see IntervalEventTrigger
   */
  public class TimeIntervalsManeuverTrigger extends IntervalEventTrigger<BooleanDetector> {
  
      /**
       * Private constructor.
       * @param booleanDetector prototype detector
       */
      private TimeIntervalsManeuverTrigger(final BooleanDetector booleanDetector) {
          super(booleanDetector);
      }
  
      /**
       * Build an instance based on the input time intervals. Detectors are created with default settings.
       * @param timeIntervals intervals
       * @return maneuver trigger
       */
      public static TimeIntervalsManeuverTrigger of(final TimeInterval... timeIntervals) {
          final EventHandler arbitraryHandler = new ContinueOnEvent();
          final BooleanDetector detector = BooleanDetector.orCombine(Arrays.stream(timeIntervals)
                  .map(timeInterval -> new TimeIntervalDetector(arbitraryHandler, timeInterval))
                  .collect(Collectors.toList()));
          final Set<TimeStamped> dates = new HashSet<>();
          Arrays.stream(timeIntervals).forEach(interval -> dates.add(interval.getStartDate()));
          Arrays.stream(timeIntervals).forEach(interval -> dates.add(interval.getEndDate()));
          final AdaptableInterval maxCheck = DateDetectionAdaptableIntervalFactory
                  .getDatesDetectionInterval(dates.toArray(new TimeStamped[0]));
          return new TimeIntervalsManeuverTrigger(detector.withMaxCheck(maxCheck));
      }
  
      /**
       * Build an instance based on the input time interval detectors.
       * @param timeIntervalDetectors detectors
       * @return maneuver trigger
       */
      public static TimeIntervalsManeuverTrigger of(final TimeIntervalDetector... timeIntervalDetectors) {
          final BooleanDetector detector = BooleanDetector.orCombine(timeIntervalDetectors);
          return new TimeIntervalsManeuverTrigger(detector);
      }
  
      @Override
      @SuppressWarnings("unchecked")
      protected <D extends FieldEventDetector<S>, S extends CalculusFieldElement<S>> D convertIntervalDetector(final Field<S> field,
                                                                                                               final BooleanDetector detector) {
          final FieldEventHandler<S> arbitraryHandler = new FieldContinueOnEvent<>();
          return (D) FieldBooleanDetector.orCombine(detector.getDetectors().stream()
                  .map(TimeIntervalDetector.class::cast)
                  .map(intervalDetector -> new FieldTimeIntervalDetector<>(new FieldEventDetectionSettings<>(field,
                          intervalDetector.getDetectionSettings()), arbitraryHandler, intervalDetector.getTimeInterval()))
                  .collect(Collectors.toList()));
     }
 
     @Override
     public List<ParameterDriver> getParametersDrivers() {
         return Collections.emptyList();
     }
 }