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

import org.gcube.datacatalogue.utillibrary.shared.ItemStatus;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.ClickItemEvent;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.ClickItemEventHandler;
import org.gcube.portlets.widgets.ckancontentmoderator.client.ui.CkanFramePanel;
import org.gcube.portlets.widgets.ckancontentmoderator.client.ui.ContentModeratorPaginatedView;
import org.gcube.portlets.widgets.ckancontentmoderator.client.ui.ContentModeratorSystemBaseView;
import org.gcube.portlets.widgets.ckancontentmoderator.client.ui.ContentModeratorToolbar;
import org.gcube.portlets.widgets.ckancontentmoderator.client.ui.MainTabPanel;
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.event.shared.HandlerManager;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.ComplexPanel;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.VerticalPanel;

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

	public final static CkanContentModeratorServiceAsync contentModeratorService = GWT
			.create(CkanContentModeratorService.class);
	
	private FlowPanel mainPanel = new FlowPanel();

//	private ItemsTable<CatalogueDataset> itemsTable;
	private ContentModeratorSystemBaseView cmsPanel = new ContentModeratorSystemBaseView();
	private ContentModeratorToolbar toolbar;
	private MainTabPanel mainTabPanel = new MainTabPanel();
	private Boolean isContentModeratorEnabled = null;
	private ContentModeratorPaginatedView paginatedView;
	public final static HandlerManager eventBus = new HandlerManager(null);

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

		toolbar = new ContentModeratorToolbar(eventBus);
		paginatedView = new ContentModeratorPaginatedView(eventBus, status, displayFields, sortByField);
		// cmsPanel.addToTop(new LoadingPanel(new HTML("Loading...")));
		//cmsPanel.addToTop(toolbar);
		cmsPanel.addToCenter(paginatedView.getCellPanel());
		cmsPanel.addToBottom(paginatedView.getPagerPanel());
		mainTabPanel.addHomeWidget(cmsPanel.getPanel());
		mainPanel.add(toolbar);
		mainPanel.add(mainTabPanel);
		bindEvents();
	}

	/**
	 * Bind events.
	 */
	private void bindEvents() {

		eventBus.addHandler(ClickItemEvent.TYPE, new ClickItemEventHandler() {

			@Override
			public <T> void onClick(ClickItemEvent<T> clickItemEvent) {

				if (clickItemEvent.getItem() instanceof CatalogueDataset) {
					CatalogueDataset clickedDataset = (CatalogueDataset) clickItemEvent.getItem();
					CkanFramePanel cfp = new CkanFramePanel(eventBus);
					cfp.instanceFrame(clickedDataset.getUrl(), null);
					mainTabPanel.addTab(clickedDataset.getName(), cfp);
					// Window.open(clickedDataset.getUrl(), null, "_blank");
				}

			}
		});
	}

	/**
	 * Checks if is content moderator enabled.
	 *
	 * @return true, if is content moderator enabled
	 * @throws Exception the exception
	 */
	public boolean isContentModeratorEnabled() throws Exception {

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

		return isContentModeratorEnabled;

	}


	/**
	 * Check content moderator configuration.
	 *
	 * @param whenDone the when done
	 * @throws Exception the exception
	 */
	public void checkContentModeratorConfiguration(final Command whenDone) throws Exception {

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

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

			}

			@Override
			public void onSuccess(Boolean result) {
				isContentModeratorEnabled = result;
				if(whenDone!=null)
					whenDone.execute();

			}
		});

	}

	/**
	 * Gets the main panel.
	 *
	 * @return the main panel
	 */
	public ComplexPanel getMainPanel() {
		return mainPanel;
	}

}