/**
    * Copyright 2004 Juan Heyns. All rights reserved.
    * <p/>
    * Redistribution and use in source and binary forms, with or without modification, are
    * permitted provided that the following conditions are met:
    * <p/>
    * 1. Redistributions of source code must retain the above copyright notice, this list of
    * conditions and the following disclaimer.
    * <p/>
   * 2. Redistributions in binary form must reproduce the above copyright notice, this list
   * of conditions and the following disclaimer in the documentation and/or other materials
   * provided with the distribution.
   * <p/>
   * THIS SOFTWARE IS PROVIDED BY JUAN HEYNS ``AS IS'' AND ANY EXPRESS OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JUAN HEYNS OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
   * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   * <p/>
   * The views and conclusions contained in the software and documentation are those of the
   * authors and should not be interpreted as representing official policies, either expressed
   * or implied, of Juan Heyns.
   */
  package fr.ifremer.quadrige3.ui.swing.component.date;
  
  /*
   * #%L
   * Reef DB :: UI
   * $Id:$
   * $HeadURL:$
   * %%
   * Copyright (C) 2014 - 2015 Ifremer
   * %%
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Affero 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 Affero General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   * #L%
   */
  
  import javax.swing.event.ChangeEvent;
  import javax.swing.event.ChangeListener;
  import java.beans.PropertyChangeEvent;
  import java.beans.PropertyChangeListener;
  import java.time.LocalDate;
  import java.util.Date;
  import java.util.HashSet;
  import java.util.Set;
  
  /**
   * Created 18 April 2010
   * Updated 26 April 2010
   *
   * @author Juan Heyns
   */
  public class LocalDateModel {
  
      /**
       * Constant <code>PROPERTY_YEAR="year"</code>
       */
      private static final String PROPERTY_YEAR = "year";
      /**
       * Constant <code>PROPERTY_MONTH="month"</code>
       */
      private static final String PROPERTY_MONTH = "month";
      /**
       * Constant <code>PROPERTY_DAY="day"</code>
       */
      private static final String PROPERTY_DAY = "day";
      /**
       * Constant <code>PROPERTY_VALUE="value"</code>
       */
      static final String PROPERTY_VALUE = "value";
      /**
       * Constant <code>PROPERTY_SELECTED="selected"</code>
       */
      private static final String PROPERTY_SELECTED = "selected";
  
      private boolean modelAdjusting;
      private boolean selected;
      private LocalDate date;
      private final Set<ChangeListener> changeListeners;
      private final Set<PropertyChangeListener> propertyChangeListeners;
  
      /**
       * <p>Constructor for DateModel.</p>
       *
      * @param dateValue a {@link Date} object.
      */
     LocalDateModel(LocalDate dateValue) {
         this();
         setLocalDate(dateValue);
     }
 
     /**
      * <p>Constructor for DateModel.</p>
      */
     LocalDateModel() {
         changeListeners = new HashSet<>();
         propertyChangeListeners = new HashSet<>();
         selected = false;
         date = LocalDate.now();
     }
 
     /**
      * <p>addChangeListener.</p>
      *
      * @param changeListener a {@link ChangeListener} object.
      */
     synchronized void addChangeListener(ChangeListener changeListener) {
         changeListeners.add(changeListener);
     }
 
     /**
      * <p>removeChangeListener.</p>
      *
      * @param changeListener a {@link ChangeListener} object.
      */
     synchronized void removeChangeListener(ChangeListener changeListener) {
         changeListeners.remove(changeListener);
     }
 
     /**
      * <p>fireChangeEvent.</p>
      */
     private synchronized void fireChangeEvent() {
         if (modelAdjusting) {
             return;
         }
         modelAdjusting = true;
         for (ChangeListener changeListener : changeListeners) {
             changeListener.stateChanged(new ChangeEvent(this));
         }
         modelAdjusting = false;
     }
 
     /**
      * <p>addPropertyChangeListener.</p>
      *
      * @param listener a {@link PropertyChangeListener} object.
      */
     public synchronized void addPropertyChangeListener(PropertyChangeListener listener) {
         propertyChangeListeners.add(listener);
     }
 
     /**
      * <p>removePropertyChangeListener.</p>
      *
      * @param listener a {@link PropertyChangeListener} object.
      */
     public synchronized void removePropertyChangeListener(PropertyChangeListener listener) {
         propertyChangeListeners.remove(listener);
     }
 
     /**
      * <p>firePropertyChange.</p>
      *
      * @param propertyName a {@link String} object.
      * @param oldValue     a {@link Object} object.
      * @param newValue     a {@link Object} object.
      */
     protected synchronized void firePropertyChange(String propertyName, Object oldValue, Object newValue) {
         if (oldValue != null && oldValue.equals(newValue)) {
             return;
         }
 
         for (PropertyChangeListener listener : propertyChangeListeners) {
             listener.propertyChange(new PropertyChangeEvent(this, propertyName, oldValue, newValue));
         }
     }
 
     /**
      * <p>getDay.</p>
      *
      * @return a int.
      */
     int getDay() {
         return getSafeLocalDate().getDayOfMonth();
     }
 
     /**
      * <p>getMonth.</p>
      *
      * @return a int.
      */
     int getMonth() {
         return getSafeLocalDate().getMonthValue();
     }
 
     /**
      * <p>getYear.</p>
      *
      * @return a int.
      */
     public int getYear() {
         return getSafeLocalDate().getYear();
     }
 
     /**
      * <p>Getter for the field <code>date</code>.</p>
      *
      * @return a {@link Date} object.
      */
     LocalDate getLocalDate() {
         if (!selected) {
             return null;
         }
         return date;
     }
 
     LocalDate getSafeLocalDate() {
         return date != null ? date : LocalDate.now();
     }
 
     /**
      * <p>setDay.</p>
      *
      * @param day a int.
      */
     void setDay(int day) {
         int oldDayValue = getDay();
         if (day < 1) {
             date = getSafeLocalDate().withDayOfMonth(1).minusDays(1 - day);
         } else if (day > getSafeLocalDate().lengthOfMonth()) {
             date = getSafeLocalDate().withDayOfMonth(getSafeLocalDate().lengthOfMonth()).plusDays(day - getSafeLocalDate().lengthOfMonth());
         } else {
             date = getSafeLocalDate().withDayOfMonth(day);
         }
         fireChangeEvent();
         firePropertyChange(PROPERTY_DAY, oldDayValue, getDay());
         firePropertyChange(PROPERTY_VALUE, null, date);
     }
 
     /**
      * <p>addDay.</p>
      *
      * @param add a int.
      */
     public void addDay(int add) {
         int oldDayValue = getDay();
         date = getSafeLocalDate().plusDays(add);
         fireChangeEvent();
         firePropertyChange(PROPERTY_DAY, oldDayValue, getDay());
     }
 
     /**
      * <p>setMonth.</p>
      *
      * @param month a int.
      */
     void setMonth(int month) {
         int oldMonthValue = getMonth();
         int oldDayValue = getDay();
 
         date = getSafeLocalDate().withMonth(month);
 
         fireChangeEvent();
         firePropertyChange(PROPERTY_MONTH, oldMonthValue, getMonth());
         // only fire change event when day actually changed
         if (getDay() != oldDayValue) {
             firePropertyChange(PROPERTY_DAY, oldDayValue, getDay());
         }
     }
 
     /**
      * <p>addMonth.</p>
      *
      * @param add a int.
      */
     void addMonth(int add) {
         int oldMonthValue = getMonth();
         date = getSafeLocalDate().plusMonths(add);
         fireChangeEvent();
         firePropertyChange(PROPERTY_MONTH, oldMonthValue, getMonth());
     }
 
     /**
      * <p>setYear.</p>
      *
      * @param year a int.
      */
     public void setYear(int year) {
         int oldYearValue = getYear();
         int oldDayValue = getDay();
 
         date = getSafeLocalDate().withYear(year);
 
         fireChangeEvent();
         firePropertyChange(PROPERTY_YEAR, oldYearValue, getYear());
         // only fire change event when day actually changed
         if (getDay() != oldDayValue) {
             firePropertyChange(PROPERTY_DAY, oldDayValue, getDay());
         }
     }
 
     /**
      * <p>addYear.</p>
      *
      * @param add a int.
      */
     void addYear(int add) {
         int oldYearValue = getYear();
         date = getSafeLocalDate().plusYears(add);
         fireChangeEvent();
         firePropertyChange(PROPERTY_YEAR, oldYearValue, getYear());
     }
 
     /**
      * <p>Setter for the field <code>date</code>.</p>
      *
      * @param value a {@link Date} object.
      */
     void setLocalDate(LocalDate value) {
         int oldYearValue = getYear();
         int oldMonthValue = getMonth();
         int oldDayValue = getDay();
         boolean oldSelectedValue = isSelected();
 
         selected = value != null;
         date = value != null ? value : LocalDate.now();
 
         fireChangeEvent();
         firePropertyChange(PROPERTY_YEAR, oldYearValue, getYear());
         firePropertyChange(PROPERTY_MONTH, oldMonthValue, getMonth());
         firePropertyChange(PROPERTY_DAY, oldDayValue, getDay());
         firePropertyChange(PROPERTY_VALUE, null, date);
         firePropertyChange(PROPERTY_SELECTED, oldSelectedValue, this.selected);
     }
 
     /**
      * <p>Setter for the field <code>date</code>.</p>
      *
      * @param year  a int.
      * @param month a int.
      * @param day   a int.
      */
     public void setLocalDate(int year, int month, int day) {
         int oldYearValue = getYear();
         int oldMonthValue = getMonth();
         int oldDayValue = getDay();
 
         date = LocalDate.of(year, month, day);
 
         fireChangeEvent();
         firePropertyChange(PROPERTY_YEAR, oldYearValue, getYear());
         firePropertyChange(PROPERTY_MONTH, oldMonthValue, getMonth());
         firePropertyChange(PROPERTY_DAY, oldDayValue, getDay());
         firePropertyChange(PROPERTY_VALUE, null, date);
     }
 
     /**
      * <p>isSelected.</p>
      *
      * @return a boolean.
      */
     public boolean isSelected() {
         return selected;
     }
 
     /**
      * <p>Setter for the field <code>selected</code>.</p>
      *
      * @param selected a boolean.
      */
     public void setSelected(boolean selected) {
         boolean oldSelectedValue = isSelected();
         this.selected = selected;
         fireChangeEvent();
         firePropertyChange(PROPERTY_VALUE, null, date);
         firePropertyChange(PROPERTY_SELECTED, oldSelectedValue, this.selected);
     }
 
 }