/*
    * *************************************************************************************************************************************************************
    *
    * SteelBlue: DCI User Interfaces
    * http://tidalwave.it/projects/steelblue
    *
    * Copyright (C) 2015 - 2024 by Tidalwave s.a.s. (http://tidalwave.it)
    *
    * *************************************************************************************************************************************************************
   *
   * Licensed 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.
   *
   * *************************************************************************************************************************************************************
   *
   * git clone https://bitbucket.org/tidalwave/steelblue-src
   * git clone https://github.com/tidalwave-it/steelblue-src
   *
   * *************************************************************************************************************************************************************
   */
  package it.tidalwave.role.ui.javafx.impl.common;
  
  import javax.annotation.Nonnegative;
  import javax.annotation.Nonnull;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.Executor;
  import java.util.concurrent.RejectedExecutionException;
  import java.util.function.Consumer;
  import java.util.function.Supplier;
  import javafx.collections.ObservableList;
  import javafx.application.Platform;
  import it.tidalwave.util.annotation.VisibleForTesting;
  import it.tidalwave.role.ui.PresentationModel;
  import it.tidalwave.role.ui.javafx.impl.util.Logging;
  import lombok.experimental.UtilityClass;
  import lombok.extern.slf4j.Slf4j;
  import static java.util.Collections.emptyList;
  import static javafx.collections.FXCollections.*;
  import static it.tidalwave.role.SimpleComposite._SimpleComposite_;
  import static it.tidalwave.role.ui.javafx.impl.util.Logging.INDENT;
  
  /***************************************************************************************************************************************************************
   *
   * @author  Fabrizio Giudici
   *
   **************************************************************************************************************************************************************/
  @UtilityClass @Slf4j
  public class JavaFXWorker
    {
      public static <T> void run (@Nonnull final Executor executor,
                                  @Nonnull Supplier<T> backgroundSupplier,
                                  @Nonnull Consumer<T> javaFxFinalizer)
        {
          try
            {
              executor.execute(() ->
                {
                  final var value = backgroundSupplier.get();
                  Platform.runLater(() -> javaFxFinalizer.accept(value));
                });
            }
          catch (RejectedExecutionException e)
            {
              log.error("Background task failed: {}", e.getMessage());
            }
        }
  
      @Nonnull
      public static ObservableList<PresentationModel> childrenPm (@Nonnull final PresentationModel pm)
        {
          return childrenPm(pm, 0);
        }
  
      @Nonnull
      public static ObservableList<PresentationModel> childrenPm (@Nonnull final PresentationModel pm,
                                                                  @Nonnegative int depth)
        {
          final var indent = INDENT.substring(0, depth * 8);
          final var composite = pm.maybeAs(_SimpleComposite_);
          composite.ifPresent(c -> Logging.logObject(indent, composite));
          final List<PresentationModel> items = composite.map(c -> c.findChildren().results()).orElse(emptyList());
          final var badItems = extractBadItems(items);
  
          if (!badItems.isEmpty()) // defensive
            {
              log.error("Child object are not PresentationModel: (only 10 are shown)");
              log.error("This happens when the PresentationModel doesn't have its own Composite role that decorates the" +
                        " owner entity Composite - see SimpleCompositePresentable for instance.");
              badItems.stream().limit(10).forEach(item -> log.error("    {}", item));
              return emptyObservableList();
            }
  
          Logging.logObjects(indent, items);
         return observableArrayList(items);
       }
 
     @Nonnull
     @VisibleForTesting static List<Object> extractBadItems (@Nonnull final List<PresentationModel> items)
       {
         final List<Object> badItems = new ArrayList<>(items);
         badItems.removeIf(item -> item instanceof PresentationModel);
         return badItems;
 //        return items.stream()
 //                    .map(item -> (Object)item)
 //                    .filter(item -> !(item instanceof PresentationModel))
 //                    .peek(item -> log.error(">>>> {}", item))
 //                    .collect(toList());
       }
   }