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.events.CheckBoxSelectIemsEvent;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.CheckBoxSelectIemsEventHandler;
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.events.CloseAllTabsEvent;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.CloseAllTabsEventHandler;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.IFrameInstanciedEvent;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.IFrameInstanciedEvent.OPERATION;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.IFrameInstanciedEventHandler;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.SelectItemsWithItemStatusEvent;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.SelectItemsWithItemStatusEventHandler;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.ShowItemEvent;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.ShowItemEventHandler;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.ShowMessageEvent;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.ShowMessageEventHandler;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.TableRangeViewChangedEvent;
import org.gcube.portlets.widgets.ckancontentmoderator.client.events.TableRangeViewChangedEventHandler;
import org.gcube.portlets.widgets.ckancontentmoderator.client.ui.CkanFramePanel;
import org.gcube.portlets.widgets.ckancontentmoderator.client.ui.ContentModeratorToolbar;
import org.gcube.portlets.widgets.ckancontentmoderator.client.ui.HomeView;
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.github.gwtbootstrap.client.ui.Alert;
import com.github.gwtbootstrap.client.ui.constants.AlertType;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.shared.HandlerManager;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.ComplexPanel;
import com.google.gwt.user.client.ui.FlowPanel;

/**
 * The Class CkanContentModeratorWidgetController.
 *
 * @author Francesco Mangiacrapa at ISTI-CNR francesco.mangiacrapa@isti.cnr.it
 * 
 *         Jun 29, 2021
 */
public class CkanContentModeratorWidgetController {

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

	private FlowPanel mainPanel = new FlowPanel();
	private FlowPanel infoPanel = new FlowPanel();

	private ContentModeratorToolbar toolbar;
	private MainTabPanel mainTabPanel = new MainTabPanel();

	public final static HandlerManager eventBus = new HandlerManager(null);
	private HomeView howeView;

	/**
	 * 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) {
		toolbar = new ContentModeratorToolbar(eventBus, status);
		howeView = new HomeView(eventBus, status, displayFields, sortByField);
		mainTabPanel.addHomeWidget(howeView.getPanel());
		mainPanel.add(toolbar);
		mainPanel.add(infoPanel);
		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.getSelectItems() != null) {
					List<T> items = clickItemEvent.getSelectItems();
					// if items selected are > 0 then shows button "Update status as.."
					howeView.setVisibleUpdateStatusAction(items.size() > 0);

				}
			}
		});

		eventBus.addHandler(ShowItemEvent.TYPE, new ShowItemEventHandler() {

			@Override
			public <T> void onShowItemClicked(ShowItemEvent<T> showItemEvent) {

				if (showItemEvent.getSelectItems() != null) {
					List<T> items = showItemEvent.getSelectItems();

					for (T t : items) {
						CatalogueDataset clickedDataset = (CatalogueDataset) t;
						CkanFramePanel cfp = new CkanFramePanel(eventBus);
						cfp.instanceFrame(clickedDataset.getUrl());
						mainTabPanel.addTab(clickedDataset.getTitle(), cfp);

					}
				}
			}
		});

		eventBus.addHandler(IFrameInstanciedEvent.TYPE, new IFrameInstanciedEventHandler() {

			@Override
			public void onIFrameAction(IFrameInstanciedEvent iFrameInstanciedEent) {

				OPERATION operation = iFrameInstanciedEent.getOperation();
				if (operation != null) {
					switch (operation) {
					case INIT:
						break;
					case ONLOAD:

						break;

					default:
						break;
					}
				}

			}
		});

		eventBus.addHandler(CheckBoxSelectIemsEvent.TYPE, new CheckBoxSelectIemsEventHandler() {

			@Override
			public <T> void onValueChanged(CheckBoxSelectIemsEvent<T> onValueChangedEvent) {
				howeView.markItemsAsChecked(onValueChangedEvent.isChecked(), true);

			}
		});

		eventBus.addHandler(TableRangeViewChangedEvent.TYPE, new TableRangeViewChangedEventHandler() {

			@Override
			public <T> void onRangeChanged(TableRangeViewChangedEvent<T> tableRangeViewChangedEvent) {
				howeView.setVisibleUpdateStatusAction(false);
				howeView.setCheckedCheckboxSelectAll(false);
			}
		});

		eventBus.addHandler(CloseAllTabsEvent.TYPE, new CloseAllTabsEventHandler() {

			@Override
			public void onClick(CloseAllTabsEvent closeAllTabsEvent) {
				mainTabPanel.closeTabs();
			}
		});

		eventBus.addHandler(SelectItemsWithItemStatusEvent.TYPE, new SelectItemsWithItemStatusEventHandler() {

			@Override
			public void onValueChanged(SelectItemsWithItemStatusEvent statusSelectedEvent) {
				GWT.log("On value changed: " + statusSelectedEvent.getItemStatus());
				infoPanel.clear();
				if (statusSelectedEvent.getItemStatus() != null) {
					howeView.loadItemsWithStatus(statusSelectedEvent.getItemStatus());
					mainTabPanel.selectTab(0);
				}

				if (statusSelectedEvent.getDisplayMessage() != null) {
					showMessage(statusSelectedEvent.getDisplayMessage(), statusSelectedEvent.getAlertType());
				}

			}
		});

		eventBus.addHandler(ShowMessageEvent.TYPE, new ShowMessageEventHandler() {

			@Override
			public void onShowMessage(ShowMessageEvent showMessageEvent) {

				if (showMessageEvent.getMsg() != null) {
					showMessage(showMessageEvent.getMsg(), showMessageEvent.getAlerType());

				}
			}
		});
	}

	private void showMessage(String msg, AlertType alertType) {

		final Alert alert = new Alert(msg);
		alertType = alertType != null ? alertType : AlertType.INFO;
		alert.setType(alertType);
		alert.setClose(true);
		alert.setAnimation(true);
		infoPanel.add(alert);

		// Cleans the info panel after 12 sec.
		Timer t = new Timer() {

			@Override
			public void run() {
				infoPanel.clear();
			}
		};

		t.schedule(12000);
	}

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

}