/**
    * This file Copyright (c) 2010-2014 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.cms.gui.i18n;
  
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.gui.control.Control;
  import info.magnolia.cms.gui.control.Select;
  import info.magnolia.cms.gui.dialog.Dialog;
  import info.magnolia.cms.gui.dialog.DialogControlImpl;
  import info.magnolia.cms.i18n.I18nContentSupport;
  import info.magnolia.cms.i18n.I18nContentSupportFactory;
  import info.magnolia.cms.util.BooleanUtil;
  import info.magnolia.context.MgnlContext;
  import info.magnolia.link.LinkUtil;
  
  import java.util.List;
  import java.util.Locale;
  
  import org.apache.commons.lang.LocaleUtils;
  import org.apache.commons.lang.StringUtils;
  
  
  /**
   * @author pbaerfuss
   * @version $Id$
   *
   */
  public class DefaultI18nAuthoringSupport implements I18nAuthoringSupport {
  
      private final I18nContentSupport i18nContentSupport;
      private boolean enabled = false;
  
      public DefaultI18nAuthoringSupport() {
          this.i18nContentSupport = I18nContentSupportFactory.getI18nSupport();
      }
  
      @Override
      public Control getLanguageChooser() {
          if (isEnabled() && i18nContentSupport.isEnabled() && i18nContentSupport.getLocales().size()>1){
              Select select = new Select();
  
              select.setName("locale");
              select.setEvent("onchange", "window.location = this.value");
  
              Content currentPage = MgnlContext.getAggregationState().getMainContent();
              String currentUri = createURI(currentPage, i18nContentSupport.getLocale());
              select.setValue(currentUri);
  
              for (Locale locale : i18nContentSupport.getLocales()) {
                  String uri = createURI(currentPage, locale);
                  String label = StringUtils.capitalize(locale.getDisplayLanguage(locale));
                  if(StringUtils.isNotEmpty(locale.getCountry())){
                      label += " (" + StringUtils.capitalize(locale.getDisplayCountry()) + ")";
                  }
                  select.setOptions(label, uri);
              }
  
              return select;
          }
          return null;
      }
  
      protected String createURI(Content currentPage, Locale locale) {
          // we are going to change the context language, this is ugly but is safe as only the current Thread is modified
          Locale currentLocale = i18nContentSupport.getLocale();
          String uri=null;
          try {
              // this is going to set the local in the aggregation state and hence wont change the i18nSupport object itself
             i18nContentSupport.setLocale(locale);
             uri = LinkUtil.createAbsoluteLink(currentPage);
         }
         // make sure that we always reset to the original locale
         finally{
             i18nContentSupport.setLocale(currentLocale);
         }
         return uri;
     }
 
     @Override
     public void i18nIze(Dialog dialog) {
         // TODO: should this be set in the aggregation state?
         Locale locale = LocaleUtils.toLocale(dialog.getConfigValue("locale", null));
         boolean isFallbackLanguage = i18nContentSupport.getFallbackLocale().equals(locale);
 
         if (isEnabled() && i18nContentSupport.isEnabled() && locale != null) {
             List<DialogControlImpl> tabs = dialog.getSubs();
             for (DialogControlImpl tab : tabs) {
                 List<DialogControlImpl> controls = tab.getSubs();
                 for (DialogControlImpl control : controls) {
                     boolean i18n = BooleanUtil.toBoolean(control.getConfigValue("i18n"), false);
                     if (i18n) {
                         if(!isFallbackLanguage){
                             String newName = control.getName() + "_" + locale.toString();
                             control.setName(newName);
                         }
                         String translatedLabel = control.getMessage(control.getLabel());
                         control.setLabel(translatedLabel + " (" + locale.toString() + ")");
                     }
                 }
             }
         }
     }
 
     @Override
     public boolean isEnabled() {
         return this.enabled;
     }
 
     public void setEnabled(boolean enabled) {
         this.enabled = enabled;
     }
 
 }