package org.simantics.document.ui.graphfile;

import java.net.MalformedURLException;
import java.net.URL;

import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.browser.IWebBrowser;
import org.eclipse.ui.browser.IWorkbenchBrowserSupport;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.common.request.ReadRequest;
import org.simantics.db.exception.DatabaseException;
import org.simantics.document.DocumentResource;
import org.simantics.document.ui.Activator;
import org.simantics.ui.SimanticsUI;
import org.simantics.ui.workbench.editor.AbstractResourceEditorAdapter;
import org.simantics.ui.workbench.editor.EditorAdapter;
import org.simantics.utils.ui.ExceptionUtils;

public class UrlEditorAdapter extends AbstractResourceEditorAdapter implements EditorAdapter {
	
	public UrlEditorAdapter() {
		super("Browser",Activator.imageDescriptorFromPlugin("com.famfamfam.silk", "icons/world.png"));
	}

	
	@Override
	public boolean canHandle(ReadGraph g, Resource r) throws DatabaseException {
		DocumentResource doc = DocumentResource.getInstance(g);
		if (!g.isInstanceOf(r, doc.UrlDocument))
			return false;
		String url = g.getPossibleRelatedValue(r, doc.HasUrl);
		return url != null;
	}
	
	@Override
	protected void openEditor(final Resource input) throws Exception {
		SimanticsUI.getSession().asyncRequest(new ReadRequest() {
			
			@Override
			public void run(ReadGraph graph) throws DatabaseException {
				DocumentResource doc = DocumentResource.getInstance(graph);
				final String urlString = graph.getPossibleRelatedValue(input, doc.HasUrl);
				if (urlString == null)
					return;
				
				Display.getDefault().asyncExec(new Runnable() {
					
					@Override
					public void run() {
						IWorkbenchBrowserSupport browserSupport = PlatformUI.getWorkbench().getBrowserSupport();					
						IWebBrowser browser;
						try {
							browser = browserSupport.createBrowser(null);
							URL url = new URL(urlString);
							browser.openURL(url);
							
						} catch (PartInitException e1) {
							ExceptionUtils.logAndShowError(e1);
						} catch (MalformedURLException e2) {
							ExceptionUtils.logAndShowError(e2);
						}

					}
				});
			}
		});
		

	}


}