package org.zend.php.zendserver.deployment.ui.editors;

import java.util.Collections;
import java.util.List;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.dialogs.ElementTreeSelectionDialog;

/**
 * A class to select workspace elements of out a tree structure or by entering name directly in control field. 
 *
 */
public class AnyResourceTreeSelectionDialog extends
		ElementTreeSelectionDialog {

	private Text text;

	private boolean isRefresh;

	private TreeViewer viewer;
	
	private List<IPath> result;

	private String textMessage;
	
	public AnyResourceTreeSelectionDialog(Shell parent,
			ILabelProvider labelProvider, ITreeContentProvider contentProvider) {
		super(parent, labelProvider, contentProvider);
	}
	
	@Override
	protected TreeViewer createTreeViewer(Composite parent) {
		viewer = super.createTreeViewer(parent);
		
		viewer.addSelectionChangedListener(new ISelectionChangedListener() {
			
			public void selectionChanged(SelectionChangedEvent event) {
				if (isRefresh) {
					return;
				}
				
				isRefresh = true;
				try {
					IStructuredSelection ssel = ((IStructuredSelection) event.getSelection());
					String newText = ssel.isEmpty() ? "" : ((IResource)ssel.getFirstElement()).getProjectRelativePath().toPortableString();  //$NON-NLS-1$
					text.setText(newText);
					result = null;
				} finally {
					isRefresh = false;
				}
			}
		});
		
		Label label = new Label(parent, SWT.BORDER);
		label.setText(textMessage);
		text = new Text(parent, SWT.BORDER);
		text.setLayoutData(new GridData(SWT.FILL, SWT.DEFAULT, true, false));
		text.addModifyListener(new ModifyListener() {

			public void modifyText(ModifyEvent e) {
				if (isRefresh) {
					return;
				}
				
				isRefresh = true;
				try {
					String newtext = text.getText();
					IPath path = new Path(newtext);
					IResource res = ((IContainer)viewer.getInput()).findMember(path);
					if (res != null) {
						viewer.setSelection(new StructuredSelection(res));
					} else {
						viewer.setSelection(StructuredSelection.EMPTY);
					}
					result = Collections.singletonList(path);
				} finally {
					isRefresh = false;
				}
			}
		});
		
		return viewer;
	}
	
	/*
     * @see SelectionStatusDialog#computeResult()
     */
    protected void computeResult() {
       if (result != null) {
    	   setResult(result);
       } else {
    	   super.computeResult();
       }
    }

	public void setTextMessage(String text) {
		textMessage = text;
	}

}