package org.argeo.documents.e4.parts;
   
   import java.nio.file.Path;
   
   import javax.annotation.PostConstruct;
   import javax.annotation.PreDestroy;
   import javax.inject.Inject;
   import javax.inject.Named;
   import javax.jcr.Node;
  import javax.jcr.NodeIterator;
  import javax.jcr.Repository;
  import javax.jcr.RepositoryException;
  import javax.jcr.Session;
  import javax.jcr.query.Query;
  import javax.jcr.query.QueryManager;
  import javax.jcr.query.QueryResult;
  
  import org.argeo.cms.util.CmsUtils;
  import org.argeo.connect.ui.ConnectUiConstants;
  import org.argeo.connect.ui.SystemWorkbenchService;
  import org.argeo.connect.ui.util.BasicNodeListContentProvider;
  import org.argeo.connect.ui.widgets.DelayedText;
  import org.argeo.connect.util.ConnectJcrUtils;
  import org.argeo.connect.util.XPathUtils;
  import org.argeo.documents.DocumentsException;
  import org.argeo.documents.ui.DocumentsSingleColumnLP;
  import org.argeo.eclipse.ui.EclipseUiUtils;
  import org.argeo.jcr.JcrUtils;
  import org.eclipse.e4.ui.di.Focus;
  import org.eclipse.jface.layout.TableColumnLayout;
  import org.eclipse.jface.viewers.ColumnWeightData;
  import org.eclipse.jface.viewers.DoubleClickEvent;
  import org.eclipse.jface.viewers.IDoubleClickListener;
  import org.eclipse.jface.viewers.ILabelProvider;
  import org.eclipse.jface.viewers.IStructuredSelection;
  import org.eclipse.jface.viewers.StructuredSelection;
  import org.eclipse.jface.viewers.TableViewer;
  import org.eclipse.rap.rwt.RWT;
  import org.eclipse.rap.rwt.client.service.BrowserNavigation;
  import org.eclipse.swt.SWT;
  import org.eclipse.swt.events.KeyEvent;
  import org.eclipse.swt.events.KeyListener;
  import org.eclipse.swt.events.ModifyEvent;
  import org.eclipse.swt.events.ModifyListener;
  import org.eclipse.swt.layout.GridData;
  import org.eclipse.swt.layout.GridLayout;
  import org.eclipse.swt.widgets.Composite;
  import org.eclipse.swt.widgets.Table;
  import org.eclipse.swt.widgets.TableColumn;
  import org.eclipse.swt.widgets.Text;
  
  public class DocumentsDashboard implements IDoubleClickListener {
  	@Inject
  	@Named("(cn=home)")
  	private Repository repository;
  	@Inject
  	private SystemWorkbenchService systemWorkbenchService;
  
  	private Session session;
  	private Text filterTxt;
  	private TableViewer searchResultsViewer;
  	private Composite searchCmp;
  
  	@PostConstruct
  	public void createPartControl(Composite parent) {
  		session = ConnectJcrUtils.login(repository);
  		// MainLayout
  		parent.setLayout(new GridLayout());
  		addFilterPanel(parent);
  		searchCmp = new Composite(parent, SWT.NO_FOCUS);
  		searchCmp.setLayout(EclipseUiUtils.noSpaceGridLayout());
  		searchResultsViewer = createListPart(searchCmp, new DocumentsSingleColumnLP(systemWorkbenchService));
  		GridData gd = EclipseUiUtils.fillWidth();
  		gd.heightHint = 0;
  		searchCmp.setLayoutData(gd);
  	}
  
  	public void addFilterPanel(Composite parent) {
  		// Use a delayed text: the query won't be done until the user stop
  		// typing for 800ms
  		int style = SWT.BORDER | SWT.SEARCH | SWT.ICON_CANCEL;
  		DelayedText delayedText = new DelayedText(parent, style, ConnectUiConstants.SEARCH_TEXT_DELAY);
  		filterTxt = delayedText.getText();
  		filterTxt.setLayoutData(EclipseUiUtils.fillWidth());
  
  		// final ServerPushSession pushSession = new ServerPushSession();
  		delayedText.addDelayedModifyListener(null, new ModifyListener() {
  			private static final long serialVersionUID = 5003010530960334977L;
  
  			public void modifyText(ModifyEvent event) {
  				delayedText.getText().getDisplay().asyncExec(new Runnable() {
  					@Override
  					public void run() {
  						int resultNb = refreshFilteredList();
  						if (resultNb > 0)
  							((GridData) searchCmp.getLayoutData()).heightHint = 120;
  						else
  							((GridData) searchCmp.getLayoutData()).heightHint = 0;
  						parent.layout(true, true);
 					}
 				});
 				// pushSession.stop();
 			}
 		});
 
 		// Jump to the first item of the list using the down arrow
 		filterTxt.addKeyListener(new KeyListener() {
 			private static final long serialVersionUID = -4523394262771183968L;
 
 			@Override
 			public void keyReleased(KeyEvent e) {
 			}
 
 			@Override
 			public void keyPressed(KeyEvent e) {
 				// boolean shiftPressed = (e.stateMask & SWT.SHIFT) != 0;
 				// boolean altPressed = (e.stateMask & SWT.ALT) != 0;
 				if (e.keyCode == SWT.ARROW_DOWN || e.keyCode == SWT.TAB) {
 					Object first = searchResultsViewer.getElementAt(0);
 					if (first != null) {
 						searchResultsViewer.getTable().setFocus();
 						searchResultsViewer.setSelection(new StructuredSelection(first), true);
 					}
 					e.doit = false;
 				}
 			}
 		});
 	}
 
 	protected TableViewer createListPart(Composite parent, ILabelProvider labelProvider) {
 		parent.setLayout(new GridLayout());
 
 		Composite tableComposite = new Composite(parent, SWT.NONE);
 		tableComposite.setLayoutData(EclipseUiUtils.fillAll());
 
 		TableViewer v = new TableViewer(tableComposite);
 		v.setLabelProvider(labelProvider);
 
 		TableColumn singleColumn = new TableColumn(v.getTable(), SWT.V_SCROLL);
 		TableColumnLayout tableColumnLayout = new TableColumnLayout();
 		tableColumnLayout.setColumnData(singleColumn, new ColumnWeightData(100));
 		tableComposite.setLayout(tableColumnLayout);
 
 		// Corresponding table & style
 		Table table = v.getTable();
 		table.setLinesVisible(false);
 		table.setHeaderVisible(false);
 		CmsUtils.markup(table);
 		CmsUtils.setItemHeight(table, 26);
 
 		v.setContentProvider(new BasicNodeListContentProvider());
 		v.addDoubleClickListener(this);
 		return v;
 	}
 
 	protected int refreshFilteredList() {
 		try {
 			String filter = filterTxt.getText();
 			if (EclipseUiUtils.isEmpty(filter)) {
 				searchResultsViewer.setInput(null);
 				return 0;
 			}
 			// XPATH Query
 			// String cf = XPathUtils.encodeXPathStringValue(filter);
 			// String xpathQueryStr = "//element(*, nt:hierarchyNode)";
 			// // + ConnectJcrUtils.getLocalJcrItemName(NodeType.NT_FILE) + ")";
 			// String xpathFilter = XPathUtils.getFreeTextConstraint(filter);
 			// if (notEmpty(xpathFilter))
 			// xpathQueryStr += "[(" + xpathFilter + ") or "
 			// //
 			// + "(fn:name() = '" + cf + "' )" + "]";
 			// QueryManager queryManager =
 			// session.getWorkspace().getQueryManager();
 			// Query xpathQuery = queryManager.createQuery(xpathQueryStr,
 			// ConnectConstants.QUERY_XPATH);
 
 			// SQL2 QUERY
 			String cf = XPathUtils.encodeXPathStringValue(filter);
 			String qStr = "SELECT * FROM [nt:hierarchyNode] WHERE UPPER(LOCALNAME()) LIKE '%" + cf.toUpperCase() + "%'";
 			QueryManager queryManager = session.getWorkspace().getQueryManager();
 			Query xpathQuery = queryManager.createQuery(qStr, Query.JCR_SQL2);
 
 			// xpathQuery.setLimit(TrackerUiConstants.SEARCH_DEFAULT_LIMIT);
 			QueryResult result = xpathQuery.execute();
 			NodeIterator nit = result.getNodes();
 			searchResultsViewer.setInput(JcrUtils.nodeIteratorToList(nit));
 
 			return (int) nit.getSize();
 		} catch (RepositoryException e) {
 			throw new DocumentsException("Unable to list files", e);
 		}
 	}
 
 	@Override
 	public void doubleClick(DoubleClickEvent event) {
 		IStructuredSelection selection = (IStructuredSelection) event.getSelection();
 		if (selection.isEmpty())
 			return;
 		else {
 			Object element = selection.getFirstElement();
 			Node currNode;
 
 			if (element instanceof Node) {
 				currNode = (Node) element;
 			} else if (element instanceof Path) {
 				Path currPath = (Path) element;
 				String jcrPath = currPath.toString();
 				// TODO rather directly use the jcrPath / an URI?
 				currNode = ConnectJcrUtils.getNode(session, jcrPath);
 			} else
 				throw new IllegalArgumentException("Cannot manage " + element + ", only Node and Path are supported.");
 			systemWorkbenchService.openEntityEditor(currNode);
 		}
 	}
 
 	@Focus
 	public void setFocus() {
 		// RAP specific
 		RWT.getClient().getService(BrowserNavigation.class).pushState("~", "Docs");
 	}
 
 	@PreDestroy
 	public void destroy() {
 		JcrUtils.logoutQuietly(session);
 	}
 }