package org.gcube.portlets.user.dataminermanager.client.info;

import java.util.ArrayList;
import java.util.List;

import org.gcube.data.analysis.dataminermanagercl.shared.service.ServiceInfo;
import org.gcube.portlets.user.dataminermanager.client.common.EventBusProvider;
import org.gcube.portlets.user.dataminermanager.client.events.ServiceInfoEvent;
import org.gcube.portlets.user.dataminermanager.client.events.ServiceInfoRequestEvent;

import com.allen_sauer.gwt.log.client.Log;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Style.Unit;
import com.sencha.gxt.core.client.dom.ScrollSupport.ScrollMode;
import com.sencha.gxt.core.client.util.Margins;
import com.sencha.gxt.data.shared.ListStore;
import com.sencha.gxt.widget.core.client.FramedPanel;
import com.sencha.gxt.widget.core.client.container.HtmlLayoutContainer;
import com.sencha.gxt.widget.core.client.container.MarginData;
import com.sencha.gxt.widget.core.client.container.SimpleContainer;
import com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer;
import com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer.VerticalLayoutData;
import com.sencha.gxt.widget.core.client.form.FieldSet;
import com.sencha.gxt.widget.core.client.grid.ColumnConfig;
import com.sencha.gxt.widget.core.client.grid.ColumnModel;
import com.sencha.gxt.widget.core.client.grid.Grid;

/**
 * 
 * @author Giancarlo Panichi
 *
 *
 */
public class ServiceInfoPanel extends FramedPanel {

	private static final ServiceInfoDataProperties props = GWT.create(ServiceInfoDataProperties.class);
	private VerticalLayoutContainer v;
	private VerticalLayoutContainer environmentVBox;

	public ServiceInfoPanel() {
		super();
		Log.debug("ServiceInfoPanel");
		init();
		create();
		bind();
		EventBusProvider.INSTANCE.fireEvent(new ServiceInfoRequestEvent());

	}

	private void init() {
		setItemId("ServiceInfoPanel");
		forceLayoutOnResize = true;
		setBodyBorder(false);
		setBorders(false);
		setBodyStyle("backgroundColor:white;");
		setHeaderVisible(false);
		setResize(true);
		setHeadingText("Service Info");
		setBodyStyle("backgroundColor:white;");

	}

	private void create() {
		try {
			v = new VerticalLayoutContainer();
			v.setScrollMode(ScrollMode.AUTO);
			add(v);
			createView();
			forceLayout();
		} catch (Throwable e) {
			Log.error("Error creating ServiceInfoPanel: " + e.getLocalizedMessage(), e);
		}
	}

	private void bind() {

		EventBusProvider.INSTANCE.addHandler(ServiceInfoEvent.TYPE, new ServiceInfoEvent.ServiceInfoEventHandler() {

			@Override
			public void onRequest(ServiceInfoEvent event) {
				Log.debug("Catch ServiceInfoEvent");
				showServiceInfo(event.getServiceInfo());

			}

		});

	}

	private void createView() {

		SimpleContainer sectionTitle = new SimpleContainer();
		// title
		HtmlLayoutContainer title = new HtmlLayoutContainer(
				"<center style='font-size:16px;font-weight:bold;'>Service Info</center>");
		sectionTitle.add(title, new MarginData());
		sectionTitle.getElement().getStyle().setMarginRight(20, Unit.PX);
		// v.add(sectionTitle, new VerticalLayoutData(1, -1, new
		// Margins(0)));
		v.add(sectionTitle, new VerticalLayoutData(-1, -1, new Margins(10)));

		FieldSet environmentFieldSet = environmentView();
		v.add(environmentFieldSet, new VerticalLayoutData(-1, -1, new Margins(10)));

	}

	private FieldSet environmentView() {
		try {
			environmentVBox = new VerticalLayoutContainer();

			FieldSet configurationFieldSet = new FieldSet();
			configurationFieldSet.setHeadingText("Environment");
			configurationFieldSet.setCollapsible(true);
			configurationFieldSet.add(environmentVBox);
			configurationFieldSet.getElement().getStyle().setMarginRight(20, Unit.PX);
			return configurationFieldSet;
		} catch (Throwable e) {
			Log.error("Error in ServiceInfoPanel in environment: " + e.getLocalizedMessage(), e);
			throw e;
		}
	}

	private void showServiceInfo(ServiceInfo serviceInfo) {

		if (serviceInfo != null && serviceInfo.getServiceProperties() != null
				&& !serviceInfo.getServiceProperties().isEmpty()) {
			ArrayList<ServiceInfoData> serviceInfoDataList = new ArrayList<>();
			for (String key : serviceInfo.getServiceProperties().keySet()) {
				ServiceInfoData serviceInfoData = new ServiceInfoData(key, serviceInfo.getServiceProperties().get(key));
				serviceInfoDataList.add(serviceInfoData);
			}

			Grid<ServiceInfoData> grid = createInfoGrid(serviceInfoDataList);
			environmentVBox.add(grid, new VerticalLayoutData(1, -1, new Margins(0, 4, 0, 4)));

		} else {
			HtmlLayoutContainer emptyInfoContainer = new HtmlLayoutContainer(
					"<div class='service-property'><p>No Info Available.</p></div>");

			environmentVBox.add(emptyInfoContainer, new VerticalLayoutData(1, -1, new Margins(0, 4, 0, 4)));
		}

		forceLayout();

	}

	private Grid<ServiceInfoData> createInfoGrid(ArrayList<ServiceInfoData> serviceInfoDataList) {

		ColumnConfig<ServiceInfoData, String> keyCol = new ColumnConfig<ServiceInfoData, String>(props.key(), 100,
				"Key");
		ColumnConfig<ServiceInfoData, String> valueCol = new ColumnConfig<ServiceInfoData, String>(props.value(), 100,
				"Value");

		List<ColumnConfig<ServiceInfoData, ?>> columns = new ArrayList<ColumnConfig<ServiceInfoData, ?>>();
		columns.add(keyCol);
		columns.add(valueCol);

		ColumnModel<ServiceInfoData> cm = new ColumnModel<ServiceInfoData>(columns);

		ListStore<ServiceInfoData> store = new ListStore<ServiceInfoData>(props.id());
		store.addAll(serviceInfoDataList);

		Grid<ServiceInfoData> grid = new Grid<ServiceInfoData>(store, cm);
		
		grid.setAllowTextSelection(false);
		grid.getView().setAutoFill(true);
		grid.getView().setAutoExpandColumn(valueCol);
		grid.getView().setEmptyText("No info retrieved");
		grid.setAllowTextSelection(true);
		grid.getView().setStripeRows(true);
		grid.getView().setColumnLines(true);
		grid.setBorders(false);
		grid.setColumnReordering(false);

		// Stage manager, turn on state management
		grid.setStateful(true);
		grid.setStateId("gridServiceInfoData");

		return grid;

	}

}