/**
    * 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.framework.overlay;
  
  import info.magnolia.ui.DialogBuilder;
  import info.magnolia.ui.api.ioc.UiContextScoped;
  import info.magnolia.ui.framework.chooser.Chooser;
  import info.magnolia.ui.framework.chooser.definition.ChooserDefinition;
  import info.magnolia.ui.framework.ioc.UiContextBoundComponentProvider;
  
  import java.util.Arrays;
  import java.util.Optional;
  import java.util.concurrent.CompletableFuture;
  
  import javax.inject.Inject;
  
  import org.apache.commons.lang3.StringUtils;
  
  import com.vaadin.ui.Button;
  import com.vaadin.ui.Window;
  
  import lombok.AccessLevel;
  import lombok.AllArgsConstructor;
  
  /**
   * Simple utility for handling the lifecycle of {@link Chooser}s.
   */
  @UiContextScoped
  public class ChooserController {
  
      private final UiContextBoundComponentProvider parentComponentProvider;
  
      @Inject
      public ChooserController(UiContextBoundComponentProvider parentComponentProvider) {
          this.parentComponentProvider = parentComponentProvider;
      }
  
      private <T> CompletableFuture<ChooseResult<T>> openChooser(Chooser<T> chooser) {
          CompletableFuture<ChooseResult<T>> result = new CompletableFuture<>();
  
          Button cancel = new Button("Cancel");
          Button choose = new Button("Select");
  
          cancel.addStyleName("v-button-secondary");
          choose.addStyleName("v-button-commit");
  
          Window chooserWindow = DialogBuilder.dialog()
                  .withTitle(StringUtils.defaultIfBlank(chooser.getTitle(), "Choose"))
                  .withContent(chooser.asVaadinComponent())
                  .withActions(Arrays.asList(cancel, choose))
                  .buildAndOpen();
  
          chooserWindow.setWidth("500px");
          chooserWindow.setHeight("500px");
          chooserWindow.addCloseListener(e -> chooser.destroy());
  
          cancel.addClickListener(e -> {
              result.complete(ChooseResult.ofNoChoice());
              chooserWindow.close();
          });
  
          choose.addClickListener(event -> {
              result.complete(ChooseResult.ofChoice(chooser.getChoice()));
              chooserWindow.close();
          });
  
          return result;
      }
 
     public <T, C extends Chooser<T>> CompletableFuture<ChooseResult<T>> openChooser(ChooserDefinition<T, C> definition) {
         return this.openChooser(definition, null);
     }
 
     public <T, C extends Chooser<T>> CompletableFuture<ChooseResult<T>> openChooser(ChooserDefinition<T, C> definition, T initialChoice) {
         Chooser<T> chooser = this.parentComponentProvider.inChildContext(definition).newInstance(definition.getImplementationClass());
         chooser.setChoice(initialChoice);
         return openChooser(chooser);
     }
 
     /**
      * Holds the choice.
      *
      * @param <T>
      *     choice item type.
      */
     @AllArgsConstructor(access = AccessLevel.PRIVATE)
     public static class ChooseResult<T> {
         private boolean isChosen;
         private T choice;
 
         static <T> ChooseResult<T> ofNoChoice() {
             return new ChooseResult<>(false, null);
         }
 
         static <T> ChooseResult<T> ofChoice(T choice) {
             return new ChooseResult<>(true, choice);
         }
 
         public boolean isChosen() {
             return this.isChosen;
         }
 
         public Optional<T> getChoice() {
             return Optional.ofNullable(choice);
         }
     }
 }