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

import java.util.ArrayList;
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.ui.table.ItemsTable.DISPLAY_FIELD;
import org.gcube.portlets.widgets.ckancontentmoderator.shared.CatalogueDataset;

import com.github.gwtbootstrap.client.ui.AlertBlock;
import com.github.gwtbootstrap.client.ui.Button;
import com.github.gwtbootstrap.client.ui.CheckBox;
import com.github.gwtbootstrap.client.ui.Dropdown;
import com.github.gwtbootstrap.client.ui.Heading;
import com.github.gwtbootstrap.client.ui.NavLink;
import com.github.gwtbootstrap.client.ui.base.AlertBase;
import com.github.gwtbootstrap.client.ui.constants.AlertType;
import com.github.gwtbootstrap.client.ui.event.ClosedEvent;
import com.github.gwtbootstrap.client.ui.event.ClosedHandler;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.HandlerManager;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.ScrollPanel;
import com.google.gwt.user.client.ui.Widget;

// TODO: Auto-generated Javadoc
/**
 * The Class HomeView.
 *
 * @author Francesco Mangiacrapa at ISTI-CNR francesco.mangiacrapa@isti.cnr.it
 * 
 *         Jun 22, 2021
 */
public class HomeView extends Composite {

	private static HomeViewUiBinder uiBinder = GWT.create(HomeViewUiBinder.class);
	private ContentModeratorSystemBaseView cmsPanel = new ContentModeratorSystemBaseView();
	private ContentModeratorPaginatedView paginatedView;

	@UiField
	HTMLPanel panelContainer;

	@UiField
	CheckBox cbSelectAll;

	@UiField
	Dropdown dropdownSetStatus;

	@UiField
	Heading pageHeader;

	@UiField
	HTMLPanel confirmPanel;
	
	private ScrollPanel confirmPanelContainer =  new ScrollPanel();

	private List<NavLink> setStatusOptions = new ArrayList<NavLink>();

	private ItemStatus displayingItemStatus;

	private HandlerManager eventBus;

	private List<CatalogueDataset> selectedItems;

	/**
	 * The Interface HomeViewUiBinder.
	 *
	 * @author Francesco Mangiacrapa at ISTI-CNR francesco.mangiacrapa@isti.cnr.it
	 * 
	 *         Jun 22, 2021
	 */
	interface HomeViewUiBinder extends UiBinder<Widget, HomeView> {
	}

	/**
	 * Instantiates a new home view.
	 *
	 * @param eventBus      the event bus
	 * @param status        the status
	 * @param displayFields the display fields
	 * @param sortByField   the sort by field
	 */
	public HomeView(HandlerManager eventBus, ItemStatus status, DISPLAY_FIELD[] displayFields,
			DISPLAY_FIELD sortByField) {
		initWidget(uiBinder.createAndBindUi(this));
		setDisplayingWithStatus(status);
		this.eventBus = eventBus;
		paginatedView = new ContentModeratorPaginatedView(eventBus, status, displayFields, sortByField);
		cmsPanel.addToCenter(paginatedView.getCellPanel());
		cmsPanel.addToBottom(paginatedView.getPagerPanel());
		panelContainer.add(cmsPanel.getPanel());
		setVisibleUpdateStatusAction(false);
		fillSetStatusOptions();
		bindEvents();
		confirmPanel.add(confirmPanelContainer);
	}

	/**
	 * Fill set status options.
	 */
	private void fillSetStatusOptions() {
		for (ItemStatus status : ItemStatus.values()) {
			if (!status.equals(displayingItemStatus)) {
				NavLink nl = new NavLink(status.getLabel());
				dropdownSetStatus.add(nl);
				setStatusOptions.add(nl);
			}
		}

	}

	private void setDisplayingWithStatus(ItemStatus status) {
		this.displayingItemStatus = status;
		this.pageHeader.setSubtext(status.getLabel());
	}

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

		cbSelectAll.addValueChangeHandler(new ValueChangeHandler<Boolean>() {

			@Override
			public void onValueChange(ValueChangeEvent<Boolean> event) {
				GWT.log("Is checked: " + cbSelectAll.getValue());
				eventBus.fireEvent(new CheckBoxSelectIemsEvent<CatalogueDataset>(cbSelectAll.getValue()));

			}
		});

		for (final NavLink navLink : setStatusOptions) {
			navLink.addClickHandler(new ClickHandler() {

				@Override
				public void onClick(ClickEvent event) {
					selectedItems = paginatedView.getSelectItems();
					int count = selectedItems.size();
					String msg = "Going to update status of";
					if (count > 0) {
						if (count == 1) {
							msg += " one item";
						} else {
							msg += " " + count + " items";
						}

						msg += " from <b>" + displayingItemStatus.getLabel() + "</b> to <b>" + navLink.getText()
								+ "</b>. Confirm?";
					}else
						return;
					
					showConfirm(msg);

				}
			});
		}
	}

	/**
	 * Gets the panel.
	 *
	 * @return the panel
	 */
	public Composite getPanel() {
		return this;
	}

	/**
	 * Sets the visible update status action.
	 *
	 * @param bool the new visible update status action
	 */
	public void setVisibleUpdateStatusAction(boolean bool) {
		dropdownSetStatus.setVisible(bool);
	}

	/**
	 * Mark items as checked.
	 *
	 * @param select      the select
	 * @param limitToPage the limit to page
	 */
	public void markItemsAsChecked(boolean select, boolean limitToPage) {
		paginatedView.selectItems(select, limitToPage);
	}

	/**
	 * Sets the checked checkbox select all.
	 *
	 * @param bool the new checked checkbox select all
	 */
	public void setCheckedCheckboxSelectAll(boolean bool) {
		cbSelectAll.setValue(bool);
	}

	/**
	 * Show confirm.
	 *
	 * @param msg the msg
	 */
	public void showConfirm(String msg) {
		confirmPanelContainer.clear();
		
		final AlertBlock newAlertBlock = new AlertBlock(AlertType.DEFAULT);
		newAlertBlock.setAnimation(true);
		newAlertBlock.setClose(true);

		newAlertBlock.addClosedHandler(new ClosedHandler<AlertBase>() {

			@Override
			public void onClosed(ClosedEvent<AlertBase> event) {
				confirmPanelContainer.clear();
			}
		});

		Button buttActionConfirmYes = new Button(new ClickHandler() {

			@Override
			public void onClick(ClickEvent event) {
				confirmPanelContainer.clear();
			}
		});
		buttActionConfirmYes.getElement().getStyle().setMarginLeft(10, Unit.PX);
		buttActionConfirmYes.setText("YES");
		newAlertBlock.add(buttActionConfirmYes);

		Button buttonActionConfirmNo = new Button(new ClickHandler() {

			@Override
			public void onClick(ClickEvent event) {
				confirmPanelContainer.clear();
			}
		});
		buttonActionConfirmNo.getElement().getStyle().setMarginLeft(10, Unit.PX);
		buttonActionConfirmNo.setText("NO");
		newAlertBlock.add(buttonActionConfirmNo);
		
		newAlertBlock.setHTML(msg);

		confirmPanelContainer.add(newAlertBlock);
	}

	/**
	 * Load form server the items with status.
	 *
	 * @param itemStatus the item status
	 */
	public void loadItemsWithStatus(ItemStatus itemStatus) {
		GWT.log("loadItemsWithStatus started");
		setDisplayingWithStatus(itemStatus);
		setCheckedCheckboxSelectAll(false);
		setVisibleUpdateStatusAction(false);
		try {
			confirmPanelContainer.clear();
		}catch (Exception e) {
			GWT.log("error: "+e.getMessage() + " cause: "+e.getCause().toString());
		}
		paginatedView.loadItemsForStatus(itemStatus);


		GWT.log("loadItemsWithStatus end");
	}

}