package org.gcube.portlets.widgets.ckancontentmoderator.client;

import java.util.List;

import org.gcube.datacatalogue.utillibrary.shared.ItemStatus;
import org.gcube.portlets.widgets.ckancontentmoderator.client.ui.ContentModeratorSystemPanel;
import org.gcube.portlets.widgets.ckancontentmoderator.client.ui.table.ItemsTable;
import org.gcube.portlets.widgets.ckancontentmoderator.client.ui.table.ItemsTable.DISPLAY_FIELD;
import org.gcube.portlets.widgets.ckancontentmoderator.shared.CatalogueDataset;

import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.view.client.ListDataProvider;

/**
 * The Class CkanContentModeratorWidget.
 *
 * @author Francesco Mangiacrapa at ISTI-CNR francesco.mangiacrapa@isti.cnr.it
 * 
 *         Jun 15, 2021
 */
public class CkanContentModeratorWidget {

	public final CkanContentModeratorServiceAsync contentModeratorService = GWT
			.create(CkanContentModeratorService.class);

	private ItemsTable<CatalogueDataset> itemsTable;
	private ContentModeratorSystemPanel cmsPanel = new ContentModeratorSystemPanel();
	private Boolean isContentModeratorEnabled = null;

	/**
	 * Instantiates a new ckan content moderator widget.
	 *
	 * @param displayFields the display fields
	 * @param sortByField   the sort by field
	 */
	public CkanContentModeratorWidget(DISPLAY_FIELD[] displayFields, DISPLAY_FIELD sortByField) {
		itemsTable = new ItemsTable<CatalogueDataset>(null, displayFields, sortByField);
		itemsTable.initTable(null, null, new ListDataProvider<CatalogueDataset>());
		cmsPanel.add(itemsTable.getCellTable());
	}

	/**
	 * Load items for status.
	 *
	 * @param status the status
	 * @throws Exception the exception
	 */
	public void loadItemsForStatus(ItemStatus status) throws Exception {

		if (isContentModeratorEnabled == null)
			throw new Exception("Please, first check if the content moderator is enabled in this context");

		if (!isContentModeratorEnabled)
			throw new Exception("Content Moderator is not enabled in this context");

		cmsPanel.showLoading(true);
		contentModeratorService.getListItemsForStatus(status, ContentModeratorWidgetConstants.ITEMS_PER_PAGE,
				ContentModeratorWidgetConstants.ITEM_START_INDEX, new AsyncCallback<List<CatalogueDataset>>() {

					@Override
					public void onSuccess(List<CatalogueDataset> result) {
						cmsPanel.showLoading(false);
						itemsTable.updateItems(result, true);

					}

					@Override
					public void onFailure(Throwable caught) {
						cmsPanel.showLoading(false);
						// TODO Auto-generated method stub

					}
				});

	}

	/**
	 * Checks if is content moderator enabled.
	 *
	 * @param onCompletation the on completation
	 */
	public void isContentModeratorEnabled(final Command onCompletation) {

		contentModeratorService.isContentModeratorEnabled(new AsyncCallback<Boolean>() {

			@Override
			public void onFailure(Throwable caught) {
				onCompletation.execute();

			}

			@Override
			public void onSuccess(Boolean result) {
				isContentModeratorEnabled = result;
				onCompletation.execute();

			}
		});

	}

	public Composite getPanel(){
		return cmsPanel.getPanel();
	}
}