/**
    * 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;
  
  import info.magnolia.ui.api.app.SubAppContext;
  import info.magnolia.ui.api.location.DefaultLocation;
  import info.magnolia.ui.api.location.Location;
  import info.magnolia.ui.contentapp.configuration.BrowserDescriptor;
  import info.magnolia.ui.contentapp.browser.Browser;
  import info.magnolia.ui.contentapp.browser.context.ActionConfigurationContext;
  import info.magnolia.ui.framework.UiFrameworkView;
  import info.magnolia.ui.framework.ViewProvider;
  import info.magnolia.ui.framework.app.BaseSubApp;
  
  import javax.inject.Inject;
  
  import org.apache.commons.lang3.StringUtils;
  
  import com.vaadin.ui.CssLayout;
  
  /**
   * Browser sub-app.
   */
  public class ContentBrowserSubApp extends BaseSubApp<ContentBrowserSubApp.RootView> {
  
      private Browser browser;
  
      @Inject
      public ContentBrowserSubApp(SubAppContext subAppContext, ViewProvider viewProvider) {
          super(subAppContext, viewProvider.create(subAppContext.getSubAppDescriptor().getLabel(), RootView.class));
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public RootView start(Location location) {
          final SubAppContext subAppContext = getSubAppContext();
          final BrowserDescriptor browserDescriptor = (BrowserDescriptor) subAppContext.getSubAppDescriptor();
  
          getView().bindContext(ActionConfigurationContext.class).actions().set(browserDescriptor.getActions());
          getView().bindDatasourceDefinition(browserDescriptor.getDatasource());
  
          this.browser = getView().getViewProvider().create("browser", Browser.class, browserDescriptor);
          this.browser.setLocation(BrowserLocation.wrap(location));
  
          getView().addComponent(browser.asVaadinComponent());
  
          return super.start(location);
      }
  
      @Override
      public void locationChanged(Location location) {
          super.locationChanged(location);
          browser.setLocation(BrowserLocation.wrap(location));
      }
  
      @Override
      public void stop() {
          getView().destroy();
      }
  
      @Override
      public String getCaption() {
          return getSubAppContext().getSubAppDescriptor().getLabel();
      }
  
      @Override
      public String getIcon(Location location) {
          return getSubAppContext().getSubAppDescriptor().getIcon();
     }
 
     /**
      * Root view.
      */
     public static class RootView extends CssLayout implements UiFrameworkView {
 
         public RootView() {
             setSizeFull();
         }
     }
 
     /**
      * Location used in ContentSubApps. Extends the Default Location by adding fields for the nodePath, viewType and query.
      */
     public static class BrowserLocation extends DefaultLocation {
 
         private String nodePath;
         private String viewType;
         private String query;
 
         public BrowserLocation(String appName, String subAppId, String parameter) {
             super(LOCATION_TYPE_APP, appName, subAppId, parameter);
 
             parameter = StringUtils.defaultString(parameter);
             setNodePath(extractNodePath(parameter));
             setViewType(extractView(parameter));
             setQuery(extractQuery(parameter));
         }
 
         public String getNodePath() {
             return unescapeSpecialCharacters(nodePath);
         }
 
         /**
          * If the node path is empty, assume root path.
          */
         private void setNodePath(String nodePath) {
             this.nodePath = (nodePath == null || nodePath.isEmpty()) ? "/" : escapeSpecialCharacters(nodePath);
         }
 
         public String getViewType() {
             return unescapeSpecialCharacters(viewType);
         }
 
         private void setViewType(String viewType) {
             this.viewType = escapeSpecialCharacters(viewType);
         }
 
         public String getQuery() {
             return unescapeSpecialCharacters(query);
         }
 
         private void setQuery(String query) {
             this.query = escapeSpecialCharacters(query);
         }
 
         private String extractNodePath(String parameter) {
             int i = parameter.indexOf(':');
             return i != -1 ? parameter.substring(0, i) : parameter;
         }
 
         private String extractView(String parameter) {
             // first param is path
             int i = parameter.indexOf(':');
             if (i != -1) {
                 // isolate view type parameter, there can be more
                 int j = parameter.indexOf(':', i + 1);
                 String view = (j != -1) ? parameter.substring(i + 1, j) : parameter.substring(i + 1);
                 if (StringUtils.isNotBlank(view)) {
                     return view;
                 }
             }
             return null;
         }
 
         public static String extractQuery(String fragment) {
             // nodePath
             int i = fragment.indexOf(':');
             if (i == -1) {
                 return "";
             }
             // view
             int j = fragment.indexOf(':', i + 1);
             if (j == -1) {
                 return "";
             }
             // query
             return fragment.substring(j + 1);
         }
 
         protected void updateParameter() {
             StringBuilder sb = new StringBuilder();
             sb.append(nodePath);
             sb.append(":");
             sb.append(viewType);
             sb.append(":");
             sb.append(query);
             super.setParameter(sb.toString());
         }
 
         public static BrowserLocation wrap(Location location) {
             return new BrowserLocation(location.getAppName(), location.getSubAppId(), location.getParameter());
         }
 
         public void updateNodePath(String newNodePath) {
             setNodePath(newNodePath);
             updateParameter();
         }
 
         public void updateViewType(String newViewType) {
             setViewType(newViewType);
             updateParameter();
         }
 
         public void updateQuery(String newQuery) {
             setQuery(newQuery);
             updateParameter();
         }
 
     }
 }