/*
 * Copyright 2014 Corpuslinguistic working group Humboldt University Berlin.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package annis.gui.admin;

import annis.gui.admin.view.CorpusListView;
import annis.service.objects.AnnisCorpus;
import com.vaadin.data.util.BeanContainer;
import com.vaadin.shared.ui.MarginInfo;
import com.vaadin.ui.Alignment;
import com.vaadin.ui.Button;
import com.vaadin.ui.Grid;
import com.vaadin.ui.Panel;
import com.vaadin.ui.VerticalLayout;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;

/**
 *
 * @author Thomas Krause <krauseto@hu-berlin.de>
 */
public class CorpusAdminPanel extends Panel
  implements CorpusListView
{

  private final List<CorpusListView.Listener> listeners = new LinkedList<>();

  private final BeanContainer<String, AnnisCorpus> corpusContainer = new BeanContainer<>(
    AnnisCorpus.class);

  public CorpusAdminPanel()
  {
    corpusContainer.setBeanIdProperty("name");

    final Grid corporaGrid = new Grid(corpusContainer);
    corporaGrid.setSizeFull();
    corporaGrid.setSelectionMode(Grid.SelectionMode.MULTI);
    corporaGrid.setColumns("name", "textCount", "tokenCount", "sourcePath");

    corporaGrid.getColumn("textCount").setHeaderCaption("Texts");
    corporaGrid.getColumn("tokenCount").setHeaderCaption("Tokens");
    corporaGrid.getColumn("sourcePath").setHeaderCaption("Source Path");

    Button btDelete = new Button("Delete selected");
    btDelete.addClickListener(new Button.ClickListener()
    {

      @Override
      public void buttonClick(Button.ClickEvent event)
      {
        Set<String> selection = new TreeSet<>();
        for (Object o : corporaGrid.getSelectedRows())
        {
          selection.add((String) o);
        }
        corporaGrid.getSelectionModel().reset();
        if (!selection.isEmpty())
        {

          for (CorpusListView.Listener l : listeners)
          {
            l.deleteCorpora(selection);
          }
        }
      }
    });

    VerticalLayout layout = new VerticalLayout(btDelete, corporaGrid);
    layout.setSizeFull();
    layout.setExpandRatio(corporaGrid, 1.0f);
    layout.setSpacing(true);
    layout.setMargin(new MarginInfo(true, false, false, false));

    layout.setComponentAlignment(btDelete, Alignment.MIDDLE_CENTER);

    setContent(layout);
    setSizeFull();
  }

  @Override
  public void addListener(CorpusListView.Listener listener)
  {
    listeners.add(listener);
  }

  @Override
  public void setAvailableCorpora(Collection<AnnisCorpus> corpora)
  {
    corpusContainer.removeAllItems();
    corpusContainer.addAll(corpora);
  }

}