package fr.ifremer.tutti.ui.swing.content.protocol;
   
   /*
    * #%L
    * Tutti :: UI
    * $Id:$
    * $HeadURL:$
    * %%
    * Copyright (C) 2012 - 2016 Ifremer
   * %%
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as
   * published by the Free Software Foundation, either version 3 of the
   * License, or (at your option) any later version.
   * 
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   * 
   * You should have received a copy of the GNU General Public
   * License along with this program.  If not, see
   * <http://www.gnu.org/licenses/gpl-3.0.html>.
   * #L%
   */
  
  import com.google.common.base.Predicate;
  import fr.ifremer.tutti.persistence.entities.referential.Caracteristic;
  import jaxx.runtime.swing.editor.bean.BeanDoubleList;
  import org.apache.commons.lang3.mutable.MutableInt;
  
  import javax.swing.JList;
  import java.util.Collection;
  import java.util.List;
  import java.util.Map;
  import java.util.Objects;
  import java.util.TreeMap;
  
  /**
   * Un compteur de caractéristiques.
   *
   * Created on 27/04/16.
   *
   * @author Tony Chemit - chemit@codelutin.com
   * @since 4.5
   */
  public class CaracteristicsCount {
  
      public void attachPredicateToUi(BeanDoubleList<Caracteristic> ui) {
          Predicate<List<Caracteristic>> listPredicate = input -> {
              JList<Caracteristic> selectedList = ui.getSelectedList();
              List<Caracteristic> selectedValuesList = selectedList.getSelectedValuesList();
              for (Caracteristic caracteristic : selectedValuesList) {
                  if (isCaracteristicUsed(caracteristic)) {
                      return false;
                  }
              }
              return true;
          };
          ui.getModel().addCanRemoveItemsPredicate(listPredicate);
  
      }
  
      private final MutableInt ZERO = new MutableInt();
  
      private final Map<Integer, MutableInt> counts = new TreeMap<>();
  
      public boolean isCaracteristicUsed(Caracteristic caracteristic) {
          Objects.requireNonNull(caracteristic);
          MutableInt result = counts.getOrDefault(caracteristic.getIdAsInt(), ZERO);
          return result.intValue() > 0;
      }
  
      public void addCaracteristic(Caracteristic caracteristic) {
          Objects.requireNonNull(caracteristic);
          counts.compute(caracteristic.getIdAsInt(), (k, v) -> {
              if (v == null) {
                  return new MutableInt(1);
              } else {
                  v.increment();
                  return v;
              }
          });
  
      }
  
      public void removeCaracteristic(Caracteristic caracteristic) {
          Objects.requireNonNull(caracteristic);
          counts.compute(caracteristic.getIdAsInt(), (k, v) -> {
              if (v == null || v.intValue() == 1) {
                  return null;
              } else {
                  v.decrement();
                  return v;
              }
          });
  
      }
  
     public void removeCaracteristics(Collection<Caracteristic> caracteristics) {
         Objects.requireNonNull(caracteristics);
         caracteristics.forEach(this::removeCaracteristic);
     }
 
 }