/*******************************************************************************
 * Copyright (c) 2001, 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.wsdl.ui.internal.properties.section;

import java.util.Map;

import org.eclipse.core.resources.IFile;
import org.eclipse.emf.common.util.URI;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CLabel;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.wst.common.ui.internal.dialogs.SelectSingleFileDialog;
import org.eclipse.wst.common.ui.properties.internal.provisional.ITabbedPropertyConstants;
import org.eclipse.wst.common.ui.properties.internal.provisional.TabbedPropertySheetWidgetFactory;
import org.eclipse.wst.wsdl.Definition;
import org.eclipse.wst.wsdl.Import;
import org.eclipse.wst.wsdl.ui.internal.WSDLEditor;
import org.eclipse.wst.wsdl.ui.internal.WSDLEditorPlugin;
import org.eclipse.wst.wsdl.ui.internal.util.ComponentReferenceUtil;
import org.eclipse.wst.wsdl.ui.internal.util.WSDLEditorUtil;
import org.eclipse.wst.wsdl.ui.internal.util.XMLQuickScan;
import org.w3c.dom.Element;

public class ImportSection extends AbstractSection
{
  protected Text namespaceText, prefixText, locationText;
  private String oldPrefixValue;
  Button button;
  IEditorPart editorPart;
  
	/**
	 * @see org.eclipse.wst.common.ui.properties.internal.provisional.ITabbedPropertySection#createControls(org.eclipse.swt.widgets.Composite, org.eclipse.wst.common.ui.properties.internal.provisional.TabbedPropertySheetWidgetFactory)
	 */
	public void createControls(Composite parent, TabbedPropertySheetWidgetFactory factory)
	{
		super.createControls(parent, factory);
		Composite composite = getWidgetFactory().createFlatFormComposite(parent);
		FormData data;

		namespaceText = getWidgetFactory().createText(composite, ""); //$NON-NLS-1$
		namespaceText.setEditable(false);
//		namespaceText.addListener(SWT.Modify, this);
		data = new FormData();
		data.left = new FormAttachment(0, 100);
		data.right = new FormAttachment(100, -rightMarginSpace - ITabbedPropertyConstants.HSPACE);
		data.top = new FormAttachment(0, 0);
		namespaceText.setLayoutData(data);

		CLabel namespaceLabel = getWidgetFactory().createCLabel(composite, WSDLEditorPlugin.getWSDLString("_UI_LABEL_NAMESPACE")); //$NON-NLS-1$
		data = new FormData();
		data.left = new FormAttachment(0, 0);
		data.right = new FormAttachment(namespaceText, -ITabbedPropertyConstants.HSPACE);
		data.top = new FormAttachment(namespaceText, 0, SWT.CENTER);
		namespaceLabel.setLayoutData(data);

		prefixText = getWidgetFactory().createText(composite, ""); //$NON-NLS-1$
//		prefixText.setEditable(false);
		prefixText.addListener(SWT.Modify, this);
		data = new FormData();
		data.left = new FormAttachment(0, 100);
		data.right = new FormAttachment(100, -rightMarginSpace - ITabbedPropertyConstants.HSPACE);
		data.top = new FormAttachment(namespaceText, +ITabbedPropertyConstants.VSPACE);
		prefixText.setLayoutData(data);

		CLabel prefixLabel = getWidgetFactory().createCLabel(composite, WSDLEditorPlugin.getWSDLString("_UI_LABEL_PREFIX")); //$NON-NLS-1$
		data = new FormData();
		data.left = new FormAttachment(0, 0);
		data.right = new FormAttachment(prefixText, -ITabbedPropertyConstants.HSPACE);
		data.top = new FormAttachment(prefixText, 0, SWT.CENTER);
		prefixLabel.setLayoutData(data);

		locationText = getWidgetFactory().createText(composite, ""); //$NON-NLS-1$
		locationText.setEditable(false);
//		locationText.addListener(SWT.Modify, this);

		CLabel locationLabel = getWidgetFactory().createCLabel(composite, WSDLEditorPlugin.getWSDLString("_UI_LABEL_LOCATION")); //$NON-NLS-1$
		data = new FormData();
		data.left = new FormAttachment(0, 0);
		data.right = new FormAttachment(locationText, -ITabbedPropertyConstants.HSPACE);
		data.top = new FormAttachment(locationText, 0, SWT.CENTER);
		locationLabel.setLayoutData(data);

    button = getWidgetFactory().createButton(composite, "", SWT.PUSH); //$NON-NLS-1$
    button.setImage(WSDLEditorPlugin.getInstance().getImage("icons/browsebutton.gif")); //$NON-NLS-1$

    button.addSelectionListener(this);
		data = new FormData();
		data.left = new FormAttachment(100, -rightMarginSpace + 2);
		data.right = new FormAttachment(100,0);
		data.top = new FormAttachment(locationText, 0, SWT.CENTER);
		button.setLayoutData(data);
    
    data = new FormData();
    data.left = new FormAttachment(0, 100);
    data.right = new FormAttachment(button, 0);
    data.top = new FormAttachment(prefixText, +ITabbedPropertyConstants.VSPACE);
    locationText.setLayoutData(data);
	}

	/*
	 * @see org.eclipse.wst.common.ui.properties.internal.provisional.view.ITabbedPropertySection#refresh()
	 */
	public void refresh()
	{
	  setListenerEnabled(false);  
	  Object obj = getElement();
    boolean refreshPrefixText = true;
    boolean refreshLocationText = true;
    boolean refreshNamespaceText = true;
    if (prefixText.isFocusControl())
    {
      refreshPrefixText = false;
    }
    if (locationText.isFocusControl())
    {
      refreshLocationText = false;
    }
    if (namespaceText.isFocusControl())
    {
      refreshNamespaceText = false;
    }
    
    if (refreshPrefixText)
    {
      prefixText.setText(""); //$NON-NLS-1$
    }
    if (refreshLocationText)
    {
      locationText.setText(""); //$NON-NLS-1$
    }
    if (refreshNamespaceText)
    {
      namespaceText.setText(""); //$NON-NLS-1$
    }
	  if (obj instanceof Import)
	  {
	    Element element = ((Import)obj).getElement();                           
      if (refreshLocationText)
      {
        String locationValue = element.getAttribute("location"); //$NON-NLS-1$
  	    locationText.setText(locationValue != null ? locationValue : ""); //$NON-NLS-1$
      }

      String namespaceValue = element.getAttribute("namespace"); //$NON-NLS-1$
      if (refreshNamespaceText)
      {
        namespaceText.setText(namespaceValue != null ? namespaceValue : ""); //$NON-NLS-1$
      }
      
      if (refreshPrefixText)
      {
  	    String prefix = ((Import)obj).getEnclosingDefinition().getPrefix(namespaceValue);
  	    prefixText.setText(prefix != null ? prefix : ""); //$NON-NLS-1$
      }
	  }
	oldPrefixValue = prefixText.getText();
    setListenerEnabled(true);
	}

	public void doHandleEvent(Event event) {
	    if (event.widget == prefixText && locationText.getText().length() > 0 && namespaceText.getText().length() > 0) {    	
	    	Object input = getElement();
	        Import importObj = (Import)input;
//	        org.w3c.dom.Element importElement = WSDLEditorUtil.getInstance().getElementForObject(importObj);
	        Map namespacesMap = importObj.getEnclosingDefinition().getNamespaces();

	        if (namespacesMap.containsKey(prefixText.getText())) {
	        	// We should add error messages.........
	 //           setErrorMessage(XSDEditorPlugin.getXSDString("_ERROR_LABEL_PREFIX_EXISTS"));
	        }
	        else {
	            Element definitionElement = importObj.getEnclosingDefinition().getElement();
	            definitionElement.removeAttribute("xmlns:"+oldPrefixValue);
	            definitionElement.setAttribute("xmlns:" + prefixText.getText(), namespaceText.getText());

//	            clearErrorMessage();
	            oldPrefixValue = prefixText.getText();
	        }
	    }
	}
	
  public void widgetSelected(SelectionEvent e)
  {
	  if (e.widget == button)
	  {
		  Object input = getElement();
		  
		  WSDLEditor editor = (WSDLEditor)editorPart;
		  IFile currentWSDLFile = ((IFileEditorInput)editor.getEditorInput()).getFile();
		  
		  SelectSingleFileDialog dialog = new SelectSingleFileDialog(WSDLEditorPlugin.getShell(), null, true);
		  String [] filters = { "xsd", "wsdl" }; //$NON-NLS-1$
		  IFile [] excludedFiles = { currentWSDLFile };
		  
		  dialog.addFilterExtensions(filters, excludedFiles);
		  dialog.create();
		  dialog.getShell().setText(WSDLEditorPlugin.getWSDLString("_UI_TITLE_SELECT")); //$NON-NLS-1$
		  dialog.setTitle(WSDLEditorPlugin.getWSDLString("_UI_TITLE_SELECT_FILE")); //$NON-NLS-1$
		  dialog.setMessage(WSDLEditorPlugin.getWSDLString("_UI_DESCRIPTION_SELECT_WSDL_OR_XSD")); //$NON-NLS-1$
		  int rc = dialog.open();
		  if (rc == IDialogConstants.OK_ID)
		  {
			  IFile selectedFile = dialog.getFile();
			  
			  //if (selectedFile.getLocation().toOSString().equals(currentWSDLFile.getLocation().toOSString()))
			  //{
			  //  System.out.println("SAME FILE:" + currentWSDLFile.getLocation());
			  //}
			  
			  String location = ComponentReferenceUtil.computeRelativeURI(selectedFile, currentWSDLFile, true);
			  
			  Import importObj = (Import)input;
			  org.w3c.dom.Element importElement = WSDLEditorUtil.getInstance().getElementForObject(importObj);
			  Definition definition = importObj.getEnclosingDefinition();
			  org.w3c.dom.Element definitionElement = WSDLEditorUtil.getInstance().getElementForObject(definition);
			  
			  String importTargetNamespace = ""; //$NON-NLS-1$
			  String prefix = prefixText.getText();
			  String uniquePrefix = ""; //$NON-NLS-1$
			  
			  URI uri = URI.createPlatformResourceURI(selectedFile.getFullPath().toString());      
			  
			  // note that the getTargetNamespaceURIForSchema works for both schema and wsdl files
			  // I should change the name of this convenience method
			  importTargetNamespace =  XMLQuickScan.getTargetNamespaceURIForSchema(uri.toString());
			  
			  if (prefix.trim().equals("")) //$NON-NLS-1$
			  {
				  uniquePrefix = getUniquePrefix(definition, uri.fileExtension());
			  }
			  else
			  {
				  uniquePrefix = prefix; 
			  }
			  
			  
			  if (importTargetNamespace == null ||
					  (importTargetNamespace != null && importTargetNamespace.trim().length() == 0))
			  {
				  return;  // what to do with no namespace docs?
			  }
			  
			  importElement.setAttribute("location", location); //$NON-NLS-1$
			  importElement.setAttribute("namespace", importTargetNamespace); //$NON-NLS-1$
			  
			  definitionElement.setAttribute("xmlns:" + uniquePrefix, importTargetNamespace); //$NON-NLS-1$
			  
			  namespaceText.setText(importTargetNamespace);
			  locationText.setText(location);
			  prefixText.setText(uniquePrefix);
		  }
		  
		  refresh();
	  }
  }
	
  
  private String getUniquePrefix(Definition definition, String initPrefix)
  {
    String uniquePrefix;
    Map map = definition.getNamespaces();

    if (definition.getNamespace(initPrefix) == null)
    {
      uniquePrefix = initPrefix;
    }
    else // if used, then try to create a unique one
    {
      String tempPrefix = initPrefix;
      int i = 1;
      while(map.containsKey(tempPrefix + i))
      {
        i++;
      }
      uniquePrefix = tempPrefix + i;
    }
    return uniquePrefix;    
  } 
  
  public void setEditorPart(IEditorPart editorPart)
  {
    this.editorPart = editorPart;
  }

}