package org.argeo.documents.composites;
   
   import java.io.IOException;
   import java.nio.file.Files;
   import java.nio.file.Path;
   import java.nio.file.spi.FileSystemProvider;
   
   import javax.jcr.Node;
   import javax.jcr.RepositoryException;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.argeo.cms.util.CmsUtils;
  import org.argeo.connect.util.ConnectJcrUtils;
  import org.argeo.connect.util.ConnectUtils;
  import org.argeo.documents.DocumentsException;
  import org.argeo.documents.DocumentsService;
  import org.argeo.eclipse.ui.EclipseUiUtils;
  import org.argeo.eclipse.ui.fs.FsUiUtils;
  import org.eclipse.rap.rwt.RWT;
  import org.eclipse.swt.SWT;
  import org.eclipse.swt.browser.Browser;
  import org.eclipse.swt.custom.SashForm;
  import org.eclipse.swt.layout.GridData;
  import org.eclipse.swt.layout.GridLayout;
  import org.eclipse.swt.widgets.Composite;
  import org.eclipse.swt.widgets.Label;
  
  /**
   * Default Documents file composite: a sashForm with a browser in the middle and
   * meta data at right hand side.
   */
  public class DocumentsFileComposite extends Composite {
  	private static final long serialVersionUID = -7567632342889241793L;
  
  	private final static Log log = LogFactory.getLog(DocumentsFileComposite.class);
  
  	private final Node currentBaseContext;
  
  	// UI Parts for the browser
  	private Composite rightPannelCmp;
  
  	public DocumentsFileComposite(Composite parent, int style, Node context, DocumentsService documentsService,
  			FileSystemProvider fsp) {
  		super(parent, style);
  		this.currentBaseContext = context;
  		this.setLayout(EclipseUiUtils.noSpaceGridLayout());
  		SashForm form = new SashForm(this, SWT.HORIZONTAL);
  
  		Composite centerCmp = new Composite(form, SWT.BORDER | SWT.NO_FOCUS);
  		createDisplay(centerCmp);
  
  		rightPannelCmp = new Composite(form, SWT.NO_FOCUS);
  
  		Path path = documentsService.getPath(fsp, ConnectJcrUtils.getPath(context));
  		setOverviewInput(path);
  		form.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
  		form.setWeights(new int[] { 55, 20 });
  	}
  
  	private void createDisplay(final Composite parent) {
  		parent.setLayout(EclipseUiUtils.noSpaceGridLayout());
  		Browser browser = new Browser(parent, SWT.NONE);
  		// browser.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, true,
  		// true));
  		browser.setLayoutData(EclipseUiUtils.fillAll());
  		try {
  			// FIXME make it more robust
  			String url = CmsUtils.getDataUrl(currentBaseContext, RWT.getRequest());
  			// FIXME issue with the redirection to https
  			if (url.startsWith("http://") && !url.startsWith("http://localhost"))
  				url = "https://" + url.substring("http://".length(), url.length());
  			if (log.isTraceEnabled())
  				log.debug("Trying to display " + url);
  			browser.setUrl(url);
  			browser.layout(true, true);
  		} catch (RepositoryException re) {
  			throw new DocumentsException("Cannot open file at " + currentBaseContext, re);
  		}
  	}
  
  	/**
  	 * Recreates the content of the box that displays information about the
  	 * current selected Path.
  	 */
  	private void setOverviewInput(Path path) {
  		try {
  			EclipseUiUtils.clear(rightPannelCmp);
  			rightPannelCmp.setLayout(new GridLayout());
  			if (path != null) {
  				// if (isImg(context)) {
  				// EditableImage image = new Img(parent, RIGHT, context,
  				// imageWidth);
  				// image.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER,
  				// true, false,
  				// 2, 1));
  				// }
  
  				Label contextL = new Label(rightPannelCmp, SWT.NONE);
 				contextL.setText(path.getFileName().toString());
 				contextL.setFont(EclipseUiUtils.getBoldFont(rightPannelCmp));
 				addProperty(rightPannelCmp, "Last modified", Files.getLastModifiedTime(path).toString());
 				// addProperty(rightPannelCmp, "Owner",
 				// Files.getOwner(path).getName());
 				if (Files.isDirectory(path)) {
 					addProperty(rightPannelCmp, "Type", "Folder");
 				} else {
 					String mimeType = Files.probeContentType(path);
 					if (EclipseUiUtils.isEmpty(mimeType))
 						mimeType = "<i>Unknown</i>";
 					addProperty(rightPannelCmp, "Type", mimeType);
 					addProperty(rightPannelCmp, "Size", FsUiUtils.humanReadableByteCount(Files.size(path), false));
 				}
 			}
 			rightPannelCmp.layout(true, true);
 		} catch (IOException e) {
 			throw new DocumentsException("Cannot display details for " + path.toString(), e);
 		}
 	}
 
 	// Simplify UI implementation
 	private void addProperty(Composite parent, String propName, String value) {
 		Label propLbl = new Label(parent, SWT.NONE);
 		propLbl.setText(ConnectUtils.replaceAmpersand(propName + ": " + value));
 		CmsUtils.markup(propLbl);
 	}
 }