/**
    * 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.poc;
  
  import static com.vaadin.server.Sizeable.Unit.PERCENTAGE;
  
  import info.magnolia.ui.vaadin.actionbar.Actionbar;
  import info.magnolia.ui.vaadin.gwt.client.actionbar.shared.ActionbarItem;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.util.HashMap;
  import java.util.Map;
  
  import javax.servlet.annotation.WebServlet;
  
  import com.vaadin.annotations.Theme;
  import com.vaadin.annotations.Title;
  import com.vaadin.annotations.VaadinServletConfiguration;
  import com.vaadin.annotations.Widgetset;
  import com.vaadin.server.VaadinRequest;
  import com.vaadin.server.VaadinServlet;
  import com.vaadin.ui.Component;
  import com.vaadin.ui.CssLayout;
  import com.vaadin.ui.GridLayout;
  import com.vaadin.ui.HorizontalLayout;
  import com.vaadin.ui.Label;
  import com.vaadin.ui.UI;
  
  @Theme("poctheme")
  @Title("Magnolia 6 Resurface - Icon Presenter")
  @Widgetset("info.magnolia.poc.Widgetset")
  public class IconPresenterUI extends UI {
  
      @Override
      protected void init(VaadinRequest request) {
          HorizontalLayout layout = new HorizontalLayout();
  
          GridLayout workbench = new GridLayout(4, 10);
          workbench.setMargin(true);
          workbench.setSpacing(true);
          workbench.addStyleNames("workbench", "actionbar-scrolling");
  
          final Map<String, String> icons = getAllIcons();
  
          Component actionbar = buildActionBar(icons);
          layout.addComponents(workbench, actionbar);
  
          icons.entrySet().forEach(entry -> {
              final Label present = new Label();
              present.setCaptionAsHtml(true);
              final String formattedContent = String.format("<span class=\"v-icon sampler-style %s\"></span>" +
                      "<span class=\"sampler-text\">%s</span>", entry.getKey(), entry.getKey());
              present.setCaption(formattedContent);
              workbench.addComponent(present);
          });
  
          layout.setExpandRatio(workbench, 1f);
          layout.setExpandRatio(actionbar, 0f);
  
          workbench.setSizeFull();
          layout.setWidth(100, PERCENTAGE);
  
          setContent(layout);
      }
  
     private Map<String, String> getAllIcons() {
         Map<String, String> iconsToCode = new HashMap<>();
         try (
                 InputStream file = getClass().getResourceAsStream("/VAADIN/themes/magnolia-icons/variables.scss");
                 InputStreamReader fr = new InputStreamReader(file);
                 BufferedReader br = new BufferedReader(fr)
         ) {
             String line = br.readLine();
             while (line != null) {
                 final boolean matches = line.matches("(?:\\$)(?:.*)(?:\\\"\\\\e)\\w+(?:\\\"\\;)$");
                 if (matches) {
                     final String iconName = line.substring(1, line.indexOf(":"));
                     final String iconCode = line.substring(line.indexOf("\"") + 2, line.lastIndexOf("\""));
                     iconsToCode.put(iconName, iconCode);
                 }
                 line = br.readLine();
             }
         } catch (IOException ignore) {
         }
         return iconsToCode;
     }
 
     private Component buildActionBar(Map<String, String> icons) {
         Actionbar actionbar = new Actionbar();
         actionbar.addSection("main", "Icons");
 
         icons.entrySet().stream().forEach(icon -> {
             actionbar.addAction(new ActionbarItem(icon.getKey(), icon.getKey(), icon.getKey(), "Icons"), "main");
         });
 
         actionbar.setOpen(false);
         actionbar.setHeightUndefined();
 
         CssLayout wrapper = new CssLayout();
         wrapper.addComponent(actionbar);
         wrapper.setWidthUndefined();
         wrapper.setHeight(100, PERCENTAGE);
         wrapper.addStyleNames("actionbar", "actionbar-scrolling");
         return wrapper;
     }
 
     @WebServlet(value = "/icons/*", asyncSupported = true)
     @VaadinServletConfiguration(productionMode = false, ui = IconPresenterUI.class)
     public static class Servlet extends VaadinServlet {
     }
 }