/**
    * This file Copyright (c) 2010-2018 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.ui.dialog;
  
  import info.magnolia.ui.api.overlay.OverlayLayer.ModalityLevel;
  import info.magnolia.ui.api.view.View;
  import info.magnolia.ui.dialog.actionarea.view.EditorActionAreaView;
  import info.magnolia.ui.vaadin.dialog.BaseDialog;
  import info.magnolia.ui.vaadin.dialog.BaseDialog.DialogCloseEvent;
  import info.magnolia.ui.vaadin.dialog.BaseDialog.DialogCloseEvent.Handler;
  import info.magnolia.ui.vaadin.dialog.BaseDialog.WideEvent;
  
  import java.util.LinkedHashSet;
  import java.util.Set;
  
  import com.vaadin.event.ShortcutListener;
  import com.vaadin.ui.Component;
  import com.vaadin.ui.Panel;
  
  /**
   * Base implementation of {@link DialogView}.
   */
  public class BaseDialogViewImpl extends Panel implements DialogView {
  
      public static final int DIALOG_WIDTH = 720;
  
      private BaseDialog dialog;
  
      private Set<DialogCloseHandler> dialogCloseHandlers = new LinkedHashSet<DialogCloseHandler>();
  
      private View contentView;
  
      private EditorActionAreaView actionAreaView;
  
      private ModalityLevel modalityLevel = ModalityLevel.STRONG;
  
      private boolean isClosed = false;
  
      public BaseDialogViewImpl() {
          this(new BaseDialog());
      }
  
      public BaseDialogViewImpl(BaseDialog dialog) {
          this.dialog = dialog;
  
          setContent(this.dialog);
          // We use Panel to keep keystroke events scoped within the currently focused component.
          // Without it, if you have more than one dialog open,
          // i.e. in different apps running at the same time, then all open
          // dialogs would react to the keyboard event sent on the dialog currently having the focus.
  
          setWidth(DIALOG_WIDTH, Unit.PIXELS);
          setHeight(100, Unit.PERCENTAGE); // Required for dynamic dialog shrinking upon window resize.
  
          this.dialog.addDialogCloseHandler(new Handler() {
              @Override
              public void onClose(DialogCloseEvent event) {
                  close();
              }
          });
  
          this.dialog.addWideHandler(new BaseDialog.WideEvent.Handler() {
  
              @Override
              public void onWideChanged(WideEvent event) {
                  handleSetWide(event.isWide());
              }
          });
 
         this.dialog.setSizeFull();
         this.dialog.setStyleName("dialog-panel");
     }
 
     private void handleSetWide(boolean isWide){
         if (isWide){
             setWidth(100, Unit.PERCENTAGE);
             addStyleName("wide");
         }else{
             setWidth(DIALOG_WIDTH, Unit.PIXELS);
             removeStyleName("wide");
         }
     }
 
     @Override
     public void setDescriptionVisible(boolean isDescriptionVisible) {
         dialog.setDescriptionVisibility(isDescriptionVisible);
     }
 
     @Override
     public void setDescription(String description) {
         dialog.setDialogDescription(description);
     }
 
     @Override
     public void setCaption(String caption) {
         dialog.setCaption(caption);
     }
 
     @Override
     public void setContent(View content) {
         this.contentView = content;
         dialog.setContent(content.asVaadinComponent());
     }
 
     @Override
     public void close() {
         // Some handler could call #close() method once again, but the handlers should be called only once -
         // all the subsequent calls should be avoided.
         if (!isClosed) {
             isClosed = true;
             for (final DialogCloseHandler handler : dialogCloseHandlers) {
                 handler.onDialogClose(BaseDialogViewImpl.this);
             }
             dialogCloseHandlers.clear();
         }
     }
 
     @Override
     public void setClosable(boolean isClosable) {
         if (isClosable) {
             dialog.showCloseButton();
         }
     }
 
     @Override
     public void addShortcut(ShortcutListener shortcut) {
         addShortcutListener(shortcut);
     }
 
     @Override
     public void removeShortcut(ShortcutListener shortcut) {
         removeShortcutListener(shortcut);
     }
 
     @Override
     public void addDialogCloseHandler(DialogCloseHandler handler) {
         if (handler != null) {
             dialogCloseHandlers.add(handler);
         }
     }
 
     @Override
     public void removeDialogCloseHandler(DialogCloseHandler handler) {
         dialogCloseHandlers.remove(handler);
     }
 
     @Override
     public void setActionAreaView(EditorActionAreaView actionAreaView) {
         this.actionAreaView = actionAreaView;
         dialog.setFooterToolbar(actionAreaView.asVaadinComponent());
     }
 
     @Override
     public void attach() {
         super.attach();
     }
 
     @Override
     public Component asVaadinComponent() {
         return this;
     }
 
     @Override
     public View getContentView() {
         return contentView;
     }
 
     @Override
     public EditorActionAreaView getActionAreaView() {
         return actionAreaView;
     }
 
     protected BaseDialog getDialog() {
         return this.dialog;
     }
 
     /**
      * @return the current modality or {@link ModalityLevel#STRONG} if not set.
      */
     @Override
     public ModalityLevel getModalityLevel() {
         return this.modalityLevel;
     }
 
     @Override
     public void setModalityLevel(ModalityLevel modalityLevel) {
         this.modalityLevel = modalityLevel;
         if (modalityLevel == ModalityLevel.LIGHT) {
             dialog.removeStyleName("dialog-panel");
             dialog.addStyleName("light");
             setWidth("620px");
         }
         dialog.setModalityLevel(modalityLevel.getName());
     }
 
     @Override
     public void setWide(boolean isWide) {
         handleSetWide(isWide);
         dialog.setWideOnClient(isWide);
     }
 }