/**
    * 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.ui.contentapp.browser.context.ValueContext;
  import info.magnolia.ui.contentapp.browser.drop.RowDragger;
  import info.magnolia.ui.contentapp.configuration.ListViewDefinition;
  import info.magnolia.ui.framework.datasource.components.SelectedItems;
  import info.magnolia.util.OptionalConsumer;
  
  import java.util.Optional;
  
  import javax.inject.Inject;
  
  import org.vaadin.patrik.FastNavigation;
  
  import com.vaadin.shared.ui.grid.DropMode;
  import com.vaadin.ui.CustomComponent;
  import com.vaadin.ui.Grid;
  
  /**
   * Content view presenting a flat dataset via {@link Grid Vaadin Grid component}.
   * @param <T> item type.
   */
  public class ListView<T> extends CustomComponent implements ContentView {
  
      protected final Grid<T> grid;
  
      @Inject
      public ListView(ValueContext<T> valueContext, ListViewDefinition<T> definition) {
          ListPresenter<T> listPresenter = this.create(ListPresenter.class);
          bindInstance(ListPresenter.class, listPresenter);
  
          grid = Grid.withPropertySet(listPresenter.getPropertySet());
          grid.setSizeFull();
          grid.setSelectionMode(definition.isMultiSelect() ? Grid.SelectionMode.MULTI : Grid.SelectionMode.SINGLE);
          grid.addSelectionListener(event -> valueContext.current().set(SelectedItems.of(event.getAllSelectedItems())));
          grid.addItemClickListener(event -> {
              grid.deselectAll();
              grid.select(event.getItem());
          });
  
          FastNavigation<T> navigation = new FastNavigation<>(grid, true);
          navigation.setOpenEditorWithSingleClick(false);
          navigation.setOpenEditorOnTyping(true);
          navigation.addEditorOpenShortcut(13);
  
          listPresenter.createColumns(grid);
  
          Optional.ofNullable(definition.getDropConstraint()).ifPresent(dropConstraint -> getComponentProvider().newInstance(RowDragger.class, grid, DropMode.BETWEEN, dropConstraint));
  
          valueContext
                  .current()
                  .observe(value -> OptionalConsumer.of(value)
                                  .ifPresent(ts -> {
                                      if (ts.size() > 0) {
                                          ts.stream().forEach(grid::select);
                                      } else {
                                          grid.deselectAll();
                                      }
                                  })
                                  .ifNotPresent(grid::deselectAll));
  
          grid.setDataProvider(listPresenter.getDataProvider());
  
          setSizeFull();
          setCompositionRoot(grid);
      }
 }