package org.gcube.portlets.user.td.rulewidget.client;

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

import org.gcube.portlets.user.td.expressionwidget.client.rpc.ExpressionServiceAsync;
import org.gcube.portlets.user.td.expressionwidget.shared.rule.RuleDescriptionDataProperties;
import org.gcube.portlets.user.td.gwtservice.shared.exception.TDGWTSessionExpiredException;
import org.gcube.portlets.user.td.gwtservice.shared.rule.description.RuleDescriptionData;
import org.gcube.portlets.user.td.rulewidget.client.resources.ResourceBundle;
import org.gcube.portlets.user.td.widgetcommonevent.client.CommonMessages;
import org.gcube.portlets.user.td.widgetcommonevent.client.event.SessionExpiredEvent;
import org.gcube.portlets.user.td.widgetcommonevent.client.type.SessionExpiredType;
import org.gcube.portlets.user.td.wizardwidget.client.util.UtilsGXT3;

import com.allen_sauer.gwt.log.client.Log;
import com.google.gwt.cell.client.AbstractCell;
import com.google.gwt.cell.client.DateCell;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.event.logical.shared.SelectionEvent;
import com.google.gwt.event.logical.shared.SelectionHandler;
import com.google.gwt.i18n.client.DateTimeFormat;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.web.bindery.event.shared.EventBus;
import com.sencha.gxt.cell.core.client.ButtonCell.IconAlign;
import com.sencha.gxt.core.client.IdentityValueProvider;
import com.sencha.gxt.core.client.Style.SelectionMode;
import com.sencha.gxt.core.client.XTemplates;
import com.sencha.gxt.core.client.resources.ThemeStyles;
import com.sencha.gxt.core.client.util.Margins;
import com.sencha.gxt.data.client.loader.RpcProxy;
import com.sencha.gxt.data.shared.ListStore;
import com.sencha.gxt.data.shared.ModelKeyProvider;
import com.sencha.gxt.data.shared.Store;
import com.sencha.gxt.data.shared.Store.StoreFilter;
import com.sencha.gxt.data.shared.loader.ListLoadConfig;
import com.sencha.gxt.data.shared.loader.ListLoadResult;
import com.sencha.gxt.data.shared.loader.ListLoadResultBean;
import com.sencha.gxt.data.shared.loader.ListLoader;
import com.sencha.gxt.data.shared.loader.LoadResultListStoreBinding;
import com.sencha.gxt.widget.core.client.FramedPanel;
import com.sencha.gxt.widget.core.client.button.TextButton;
import com.sencha.gxt.widget.core.client.container.BoxLayoutContainer.BoxLayoutData;
import com.sencha.gxt.widget.core.client.container.BoxLayoutContainer.BoxLayoutPack;
import com.sencha.gxt.widget.core.client.container.HBoxLayoutContainer;
import com.sencha.gxt.widget.core.client.container.HBoxLayoutContainer.HBoxLayoutAlign;
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.event.SelectEvent;
import com.sencha.gxt.widget.core.client.event.SelectEvent.SelectHandler;
import com.sencha.gxt.widget.core.client.form.TextField;
import com.sencha.gxt.widget.core.client.grid.CheckBoxSelectionModel;
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;
import com.sencha.gxt.widget.core.client.menu.Item;
import com.sencha.gxt.widget.core.client.menu.Menu;
import com.sencha.gxt.widget.core.client.menu.MenuItem;
import com.sencha.gxt.widget.core.client.toolbar.LabelToolItem;
import com.sencha.gxt.widget.core.client.toolbar.ToolBar;

public class RuleDeletePanel extends FramedPanel {
	private static final String WIDTH = "760px";
	private static final String HEIGHT = "520px";
	private static final String GRID_HEIGHT = "384px";
	private static final DateTimeFormat sdf=DateTimeFormat.getFormat("yyyy-MM-dd HH:mm");
	
	interface RuleDeleteTemplates extends XTemplates {
		@XTemplate("<span title=\"{value}\">{value}</span>")
		SafeHtml format(String value);
	}

	private EventBus eventBus;
	private RuleDeleteDialog parent;

	private TextButton btnDelete;
	private TextButton btnClose;

	private ListLoader<ListLoadConfig, ListLoadResult<RuleDescriptionData>> loader;
	private Grid<RuleDescriptionData> grid;
	private ExtendedListStore<RuleDescriptionData> store;
	private RuleDeleteMessages msgs;
	private CommonMessages msgsCommon;

	public RuleDeletePanel(RuleDeleteDialog parent, EventBus eventBus) {
		this.parent = parent;
		this.eventBus = eventBus;
		Log.debug("RuleDeletePanel");
		initMessages();
		initPanel();
		create();

	}
	protected void initMessages(){
		msgs = GWT.create(RuleDeleteMessages.class);
		msgsCommon = GWT.create(CommonMessages.class);
	}
	
	protected void initPanel(){
		setWidth(WIDTH);
		setHeight(HEIGHT);
		setHeaderVisible(false);
		setBodyBorder(false);
	}

	protected void create() {
		ToolBar toolBarHead = new ToolBar();
		toolBarHead.add(new LabelToolItem(msgsCommon.toolItemSearchLabel()));
		final TextField searchField = new TextField();
		toolBarHead.add(searchField);

		TextButton btnReload = new TextButton();
		// btnReload.setText("Reload");
		btnReload.setIcon(ResourceBundle.INSTANCE.refresh());
		btnReload.setToolTip(msgsCommon.toolItemReloadLabel());
		toolBarHead.add(btnReload);

		IdentityValueProvider<RuleDescriptionData> identity = new IdentityValueProvider<RuleDescriptionData>();
		CheckBoxSelectionModel<RuleDescriptionData> sm = new CheckBoxSelectionModel<RuleDescriptionData>(
				identity);

		RuleDescriptionDataProperties props = GWT
				.create(RuleDescriptionDataProperties.class);

		ColumnConfig<RuleDescriptionData, String> nameCol = new ColumnConfig<RuleDescriptionData, String>(
				props.name(), 120, msgs.nameCol());

		nameCol.setCell(new AbstractCell<String>() {

			@Override
			public void render(Context context, String value, SafeHtmlBuilder sb) {
				RuleDeleteTemplates ruleDeleteTemplates = GWT
						.create(RuleDeleteTemplates.class);
				sb.append(ruleDeleteTemplates.format(value));
			}
		});

		ColumnConfig<RuleDescriptionData, String> scopeCol = new ColumnConfig<RuleDescriptionData, String>(
				props.scopeLabel(), 40, msgs.scopeCol());

		nameCol.setCell(new AbstractCell<String>() {

			@Override
			public void render(Context context, String value, SafeHtmlBuilder sb) {
				RuleDeleteTemplates ruleDeleteTemplates = GWT
						.create(RuleDeleteTemplates.class);
				sb.append(ruleDeleteTemplates.format(value));
			}
		});

		ColumnConfig<RuleDescriptionData, String> descriptionCol = new ColumnConfig<RuleDescriptionData, String>(
				props.description(), 120, msgs.descriptionCol());
		descriptionCol.setCell(new AbstractCell<String>() {

			@Override
			public void render(Context context, String value, SafeHtmlBuilder sb) {
				RuleDeleteTemplates ruleDeleteTemplates = GWT
						.create(RuleDeleteTemplates.class);
				sb.append(ruleDeleteTemplates.format(value));
			}
		});

		ColumnConfig<RuleDescriptionData, String> ownerCol = new ColumnConfig<RuleDescriptionData, String>(
				props.ownerLogin(), 70, msgs.ownerCol());
		ownerCol.setCell(new AbstractCell<String>() {

			@Override
			public void render(Context context, String value, SafeHtmlBuilder sb) {
				RuleDeleteTemplates ruleDeleteTemplates = GWT
						.create(RuleDeleteTemplates.class);
				sb.append(ruleDeleteTemplates.format(value));
			}
		});

		ColumnConfig<RuleDescriptionData, Date> creationDateCol = new ColumnConfig<RuleDescriptionData, Date>(
				props.creationDate(), 56, msgs.creationDateCol());

		creationDateCol.setCell(new DateCell(sdf));
		

		List<ColumnConfig<RuleDescriptionData, ?>> l = new ArrayList<ColumnConfig<RuleDescriptionData, ?>>();
		l.add(nameCol);
		l.add(scopeCol);
		l.add(descriptionCol);
		l.add(ownerCol);
		l.add(creationDateCol);
		
		ColumnModel<RuleDescriptionData> cm = new ColumnModel<RuleDescriptionData>(
				l);

		store = new ExtendedListStore<RuleDescriptionData>(props.id());

		searchField.addKeyUpHandler(new KeyUpHandler() {

			public void onKeyUp(KeyUpEvent event) {
				Log.trace("searchTerm: " + searchField.getCurrentValue());
				store.applyFilters();
			}
		});

		store.addFilter(new StoreFilter<RuleDescriptionData>() {

			@Override
			public boolean select(Store<RuleDescriptionData> store,
					RuleDescriptionData parent, RuleDescriptionData item) {
				String searchTerm = searchField.getCurrentValue();
				if (searchTerm == null)
					return true;
				return RuleDeletePanel.this.select(item, searchTerm);
			}
		});

		store.setEnableFilters(true);

		RpcProxy<ListLoadConfig, ListLoadResult<RuleDescriptionData>> proxy = new RpcProxy<ListLoadConfig, ListLoadResult<RuleDescriptionData>>() {

			public void load(
					ListLoadConfig loadConfig,
					final AsyncCallback<ListLoadResult<RuleDescriptionData>> callback) {
				loadData(loadConfig, callback);
			}
		};
		loader = new ListLoader<ListLoadConfig, ListLoadResult<RuleDescriptionData>>(
				proxy);

		loader.setRemoteSort(false);
		loader.addLoadHandler(new LoadResultListStoreBinding<ListLoadConfig, RuleDescriptionData, ListLoadResult<RuleDescriptionData>>(
				store) {
		});

		SelectHandler sh = new SelectHandler() {
			public void onSelect(SelectEvent event) {
				loader.load();
			}
		};

		btnReload.addSelectHandler(sh);

		grid = new Grid<RuleDescriptionData>(store, cm) {
			@Override
			protected void onAfterFirstAttach() {
				super.onAfterFirstAttach();
				Scheduler.get().scheduleDeferred(new ScheduledCommand() {

					public void execute() {
						loader.load();
					}
				});
			}
		};

		sm.setSelectionMode(SelectionMode.MULTI);
		grid.setLoader(loader);
		grid.setSelectionModel(sm);
		grid.setHeight(GRID_HEIGHT);
		grid.getView().setStripeRows(true);
		grid.getView().setColumnLines(true);
		grid.getView().setAutoFill(true);
		grid.setBorders(false);
		grid.setLoadMask(true);
		grid.setColumnReordering(true);
		grid.setColumnResize(true);
		grid.getView().setAutoExpandColumn(descriptionCol);

		createContextMenu();

		ToolBar toolBar = new ToolBar();
		toolBar.add(grid);
		toolBar.addStyleName(ThemeStyles.get().style().borderTop());
		toolBar.getElement().getStyle().setProperty("borderBottom", "none");

		btnDelete = new TextButton(msgs.btnDeleteText());
		btnDelete.setIcon(ResourceBundle.INSTANCE.ruleDelete());
		btnDelete.setIconAlign(IconAlign.RIGHT);
		btnDelete.setToolTip(msgs.btnDeleteToolTip());
		btnDelete.addSelectHandler(new SelectHandler() {

			public void onSelect(SelectEvent event) {
				Log.debug("Pressed Delete");
				delete();

			}
		});

		btnClose = new TextButton(msgs.btnCloseText());
		btnClose.setIcon(ResourceBundle.INSTANCE.close());
		btnClose.setIconAlign(IconAlign.RIGHT);
		btnClose.setToolTip(msgs.btnCloseToolTip());
		btnClose.addSelectHandler(new SelectHandler() {

			public void onSelect(SelectEvent event) {
				Log.debug("Pressed Close");
				close();
			}
		});

		HBoxLayoutContainer flowButton = new HBoxLayoutContainer();
		flowButton.setHBoxLayoutAlign(HBoxLayoutAlign.MIDDLE);
		flowButton.setPack(BoxLayoutPack.CENTER);

		BoxLayoutData boxLayoutData = new BoxLayoutData(new Margins(2, 4, 2, 4));
		flowButton.add(btnDelete, boxLayoutData);
		flowButton.add(btnClose, boxLayoutData);

		VerticalLayoutContainer v = new VerticalLayoutContainer();
		v.add(toolBarHead, new VerticalLayoutData(1, -1, new Margins(0)));
		v.add(grid, new VerticalLayoutData(1, -1, new Margins(0)));
		v.add(toolBar, new VerticalLayoutData(1, 25, new Margins(0)));
		v.add(flowButton,
				new VerticalLayoutData(1, 36, new Margins(5, 2, 5, 2)));
		add(v);

	}

	protected void loadData(ListLoadConfig loadConfig,
			final AsyncCallback<ListLoadResult<RuleDescriptionData>> callback) {

		ExpressionServiceAsync.INSTANCE.getRules(
				new AsyncCallback<ArrayList<RuleDescriptionData>>() {

					@Override
					public void onFailure(Throwable caught) {
						if (caught instanceof TDGWTSessionExpiredException) {
							eventBus.fireEvent(new SessionExpiredEvent(
									SessionExpiredType.EXPIREDONSERVER));
						} else {
							Log.error("Load rules failure:"
									+ caught.getLocalizedMessage());
							UtilsGXT3.alert(msgs.errorRetrievingRulesHead(),
									msgs.errorRetrievingRules());
						}
						callback.onFailure(caught);

					}

					@Override
					public void onSuccess(ArrayList<RuleDescriptionData> result) {
						Log.trace("loaded " + result.size() + " Rules");
						callback.onSuccess(new ListLoadResultBean<RuleDescriptionData>(
								result));

					}
				});
	}

	protected ArrayList<RuleDescriptionData> getSelectedItem() {
		ArrayList<RuleDescriptionData> rules = new ArrayList<RuleDescriptionData>();
		for (RuleDescriptionData rule : grid.getSelectionModel()
				.getSelectedItems()) {
			rules.add(rule);
		}
		return rules;
	}

	protected void delete() {
		ArrayList<RuleDescriptionData> rules = getSelectedItem();
		if (rules == null || rules.size() == 0) {
			UtilsGXT3.info(msgsCommon.attention(), msgs.selectTheRuleToBeDeleted());
		} else {
			Log.debug("Rules Delete: " + rules);
			parent.removeRule(rules);

		}

	}

	protected void close() {
		parent.close();
	}

	protected class ExtendedListStore<M> extends ListStore<M> {

		public ExtendedListStore(ModelKeyProvider<? super M> keyProvider) {
			super(keyProvider);
		}

		public void applyFilters() {
			super.applyFilters();
		}

	}

	public void gridReload() {
		grid.getLoader().load();
	}

	protected boolean select(RuleDescriptionData item, String searchTerm) {
		if (item.getName() != null
				&& item.getName().toLowerCase()
						.contains(searchTerm.toLowerCase()))
			return true;
		if (item.getDescription() != null
				&& item.getDescription().toLowerCase()
						.contains(searchTerm.toLowerCase()))
			return true;
		return false;
	}

	protected void requestInfo(RuleDescriptionData rule) {

		final RuleInfoDialog infoRuleDialog = new RuleInfoDialog(rule);
		infoRuleDialog.show();


	}

	protected void createContextMenu() {
		Menu contextMenu = new Menu();

		MenuItem infoItem = new MenuItem();
		infoItem.setText(msgs.infoItemText());
		infoItem.setIcon(ResourceBundle.INSTANCE.information());
		infoItem.addSelectionHandler(new SelectionHandler<Item>() {

			@Override
			public void onSelection(SelectionEvent<Item> event) {
				RuleDescriptionData selected = grid.getSelectionModel()
						.getSelectedItem();
				Log.debug(selected.toString());
				requestInfo(selected);
			}
		});

		contextMenu.add(infoItem);

		grid.setContextMenu(contextMenu);

	}

}