/*
 * Copyright (C) 2000 - 2022 Silverpeas
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * As a special exception to the terms and conditions of version 3.0 of
 * the GPL, you may redistribute this Program in connection with Free/Libre
 * Open Source Software ("FLOSS") applications as described in Silverpeas's
 * FLOSS exception.  You should have received a copy of the text describing
 * the FLOSS exception, and it is also available here:
 * "https://www.silverpeas.org/legal/floss_exception.html"
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.silverpeas.mobile.client.apps.news.pages;

import com.google.gwt.core.client.GWT;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.ui.Widget;
import org.silverpeas.mobile.client.apps.documents.events.pages.navigation.*;
import org.silverpeas.mobile.client.apps.favorites.pages.widgets.AddToFavoritesButton;
import org.silverpeas.mobile.client.apps.news.events.app.NewsLoadEvent;
import org.silverpeas.mobile.client.apps.news.events.pages.*;
import org.silverpeas.mobile.client.apps.news.pages.widgets.NewsItem;
import org.silverpeas.mobile.client.apps.news.resources.NewsMessages;
import org.silverpeas.mobile.client.common.EventBus;
import org.silverpeas.mobile.client.common.navigation.LinksManager;
import org.silverpeas.mobile.client.components.UnorderedList;
import org.silverpeas.mobile.client.components.base.PageContent;
import org.silverpeas.mobile.client.components.base.widgets.AddButton;
import org.silverpeas.mobile.client.components.base.widgets.ShareButton;
import org.silverpeas.mobile.shared.dto.ContentsTypes;
import org.silverpeas.mobile.shared.dto.RightDTO;
import org.silverpeas.mobile.shared.dto.news.NewsDTO;

import java.util.List;

public class NewsPage extends PageContent implements NewsPagesEventHandler, GedNavigationPagesEventHandler {

  private static NewsPageUiBinder uiBinder = GWT.create(NewsPageUiBinder.class);

  @UiField(provided = true) protected NewsMessages msg = null;
  @UiField UnorderedList news;

  private AddToFavoritesButton favorite = new AddToFavoritesButton();
  private ShareButton share = new ShareButton();

  private AddButton buttonCreate = new AddButton();
  private String instanceId;

  interface NewsPageUiBinder extends UiBinder<Widget, NewsPage> {
  }

  public NewsPage() {
    msg = GWT.create(NewsMessages.class);
    setPageTitle(msg.title());
    initWidget(uiBinder.createAndBindUi(this));
    EventBus.getInstance().addHandler(AbstractNewsPagesEvent.TYPE, this);
    EventBus.getInstance().addHandler(AbstractGedNavigationPagesEvent.TYPE, this);
    EventBus.getInstance().fireEvent(new NewsLoadEvent());

    buttonCreate.setId("add-news");
    buttonCreate.setCallback(new Command() {
      @Override
      public void execute() {
        NewsEditPage page = new NewsEditPage();
        page.setApp(getApp());
        page.show();
      }
    });
  }

  @Override
  public void stop() {
    super.stop();
    EventBus.getInstance().removeHandler(AbstractNewsPagesEvent.TYPE, this);
    EventBus.getInstance().removeHandler(AbstractGedNavigationPagesEvent.TYPE, this);
  }

  @Override
  public void onNewsLoad(final NewsLoadedEvent event) {

    if (news.isEmpty()) {
      RightDTO r = event.getApplicationInstance().getRights();
      if (r.getManager() || r.getPublisher()) {
        addActionShortcut(buttonCreate);
      }
      addActionMenu(favorite);
      favorite.init(instanceId, instanceId, ContentsTypes.Component.name(), getPageTitle());
      addActionMenu(share);
      share.init(getPageTitle(), getPageTitle(), LinksManager.createApplicationPermalink(instanceId));
    }

    news.clear();
    List<NewsDTO> newsDTOList = event.getNews();
    int i = 1;
    int max = newsDTOList.size();
    for (NewsDTO newsDTO : newsDTOList) {
      NewsItem item = new NewsItem();
      item.setData(i, max, newsDTO);
      news.add(item);
      instanceId = newsDTO.getInstanceId();
      i++;
    }
  }

  @Override
  public void onNewsSaved(NewsSavedEvent newsSavedEvent) {
    EventBus.getInstance().fireEvent(new NewsLoadEvent());
  }

  @Override
  public void onOneNewsLoaded(OneNewsLoadedEvent oneNewsLoadedEvent) {}

  @Override
  public void onLoadedTopics(GedItemsLoadedEvent event) {}

  @Override
  public void onGedItemClicked(GedItemClickEvent event) {}

  @Override
  public void onPublicationPublished(GedItemPublishedEvent event) {
    EventBus.getInstance().fireEvent(new NewsLoadEvent());
  }

}