/**
    * This file Copyright (c) 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.contentapp.browser;
  
  import info.magnolia.icons.MagnoliaIcons;
  import info.magnolia.ui.contentapp.browser.Workbench.WorkbenchContext;
  import info.magnolia.ui.contentapp.configuration.ContentViewDefinition;
  import info.magnolia.ui.contentapp.configuration.ContentViewsDefinition;
  import info.magnolia.ui.framework.UiFrameworkView;
  import info.magnolia.ui.theme.ResurfaceTheme;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Optional;
  
  import javax.inject.Inject;
  
  import com.vaadin.ui.Alignment;
  import com.vaadin.ui.Button;
  import com.vaadin.ui.Component;
  import com.vaadin.ui.CssLayout;
  import com.vaadin.ui.HorizontalLayout;
  import com.vaadin.ui.VerticalLayout;
  
  import lombok.AccessLevel;
  import lombok.Getter;
  
  /**
   * Container view that manages display of one of the pre-configured {@link ContentViewsDefinition content views}.
   *
   * @param <T>
   *     type of data displayed in a content view
   */
  public class ContentViews<T> extends VerticalLayout implements UiFrameworkView {
  
      private final Map<String, Component> contentViewToggleControls = new HashMap<>();
      @Getter(AccessLevel.PROTECTED)
      private final ContentViewsDefinition<T> definition;
      @Getter(AccessLevel.PROTECTED)
      private final HorizontalLayout toolBar;
  
      private ContentView currentActiveContentView;
      private WorkbenchContext workbenchContext;
  
      @Inject
      public ContentViews(WorkbenchContext workbenchContext, ContentViewsDefinition<T> definition) {
  
          this.workbenchContext = workbenchContext;
          this.definition = definition;
  
          setSizeFull();
          setSpacing(false);
          setMargin(false);
          addStyleName("content-views");
  
          toolBar = new HorizontalLayout();
          toolBar.addStyleName("toolbar");
          toolBar.setWidth(100, Unit.PERCENTAGE);
  
          toolBar.setSpacing(true);
          toolBar.setDefaultComponentAlignment(Alignment.BOTTOM_LEFT);
  
  
          final CssLayout viewModes = new CssLayout();
          viewModes.addStyleName("view-modes");
          toolBar.addComponent(viewModes);
          toolBar.setComponentAlignment(viewModes, Alignment.BOTTOM_RIGHT);
  
         addComponents(toolBar);
 
         definition.getViews().forEach((id, presenterDefinition) -> {
             final Button contentViewIcon = createContentViewIcon(id, presenterDefinition.getIcon());
             contentViewToggleControls.put(id, contentViewIcon);
             viewModes.addComponent(contentViewIcon);
         });
 
         workbenchContext.displayedContentViewId().observe(viewId -> {
             this.contentViewToggleControls.values().forEach(control -> control.removeStyleName("active"));
             viewId.ifPresent(this::switchView);
         });
     }
 
     private void switchView(String viewId) {
         Optional.ofNullable(currentActiveContentView).ifPresent(UiFrameworkView::destroy);
 
         final ContentViewDefinition<T> contentViewDefinition = definition.getViews().get(viewId);
         //TODO: we don't always want tree here, there should be a more clever check!
         this.currentActiveContentView = getViewProvider().create(contentViewDefinition);
         this.contentViewToggleControls.get(viewId).addStyleName("active");
 
         addComponent(currentActiveContentView.asVaadinComponent());
         setExpandRatio(currentActiveContentView.asVaadinComponent(), 1f);
     }
 
     protected Button createContentViewIcon(final String viewType, final String icon) {
         Button button = new Button(MagnoliaIcons.forCssClass(icon).orElse(MagnoliaIcons.VIEW_LIST),
                 clickEvent -> workbenchContext.displayedContentViewId().set(viewType));
         button.addStyleName(ResurfaceTheme.BUTTON_ICON);
         return button;
     }
 
 }