/*******************************************************************************
 * Copyright (c) 2002 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
 *     Jens Lukowski/Innoopract - initial renaming/restructuring
 *     
 *******************************************************************************/
package org.eclipse.wst.xml.ui.internal.catalog;

import java.io.ByteArrayInputStream;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.MultiStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.window.Window;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.SaveAsDialog;
import org.eclipse.wst.common.ui.internal.dialogs.SelectSingleFileDialog;
import org.eclipse.wst.xml.core.internal.catalog.CatalogSet;
import org.eclipse.wst.xml.core.internal.catalog.provisional.ICatalog;
import org.eclipse.wst.xml.ui.internal.XMLUIPlugin;

public class AdvancedOptionsDialog extends Dialog 
{
  protected ICatalog workingUserCatalog;

  public AdvancedOptionsDialog(Shell parentShell, ICatalog workingUserCatalog) 
  {
    super(parentShell);
    setShellStyle(getShellStyle() | SWT.RESIZE);   
    this.workingUserCatalog = workingUserCatalog;
  }


  protected void createButtonsForButtonBar(Composite parent) 
  {
    createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
  }


  protected Control createDialogArea(Composite parent) 
  {
    Composite dialogArea = (Composite)super.createDialogArea(parent);
//    WorkbenchHelp.setHelp(dialogArea, new ControlContextComputer(dialogArea, XMLBuilderContextIds.XMLP_PROJECT_DIALOG));
          
    Composite composite = new Composite(dialogArea, SWT.NONE);
    composite.setLayout(new GridLayout());
    composite.setLayoutData(new GridData(GridData.FILL_BOTH));  

    Label label = new Label(composite, SWT.NONE);
    label.setText(XMLCatalogMessages.UI_LABEL_DIALOG_DESCRIPTION);
                                         
    Composite buttonComposite = new Composite(composite, SWT.NONE);
    GridLayout gridLayout = new GridLayout();
    gridLayout.numColumns = 3;
    buttonComposite.setLayout(gridLayout);     
    buttonComposite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
   
    Composite placeHolder = new Composite(buttonComposite, SWT.NONE);
    placeHolder.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
    
    Composite buttonGroup = new Composite(buttonComposite, SWT.NONE);
    gridLayout = new GridLayout();
    gridLayout.numColumns = 2;
    gridLayout.makeColumnsEqualWidth = true;
    buttonGroup.setLayout(gridLayout); 
    buttonGroup.setLayoutData(createGridData());

    Button importButton = new Button(buttonGroup, SWT.PUSH | SWT.CENTER);
    importButton.setText("  " + XMLCatalogMessages.UI_BUTTON_IMPORT + "  "); //$NON-NLS-1$ //$NON-NLS-2$

    Button exportButton = new Button(buttonGroup, SWT.PUSH | SWT.CENTER);
    exportButton.setText("  " + XMLCatalogMessages.UI_BUTTON_EXPORT + "  "); //$NON-NLS-1$ //$NON-NLS-2$

    placeHolder = new Composite(buttonComposite, SWT.NONE);
    placeHolder.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

    // add importButton listener
    SelectionListener importButtonSelectionListener = new SelectionAdapter()
    {
      public void widgetSelected(SelectionEvent e)
      {                                                                 
        invokeImportDialog();              
      }     
    }; 
    importButton.addSelectionListener(importButtonSelectionListener);
        
    // add exportButton listener
    SelectionListener exportButtonSelectionListener = new SelectionAdapter()
    {
      public void widgetSelected(SelectionEvent e)
      {                                                                 
        invokeExportDialog();              
      }     
    }; 
    exportButton.addSelectionListener(exportButtonSelectionListener);

    return dialogArea;
  }
       
  protected GridData createGridData()
  {
    GridData gd = new GridData(GridData.CENTER);
    gd.horizontalAlignment = GridData.HORIZONTAL_ALIGN_CENTER;
    gd.verticalAlignment = GridData.VERTICAL_ALIGN_CENTER;
    return gd;
  }
 
                                      
  protected void invokeImportDialog()
  {                          
    SelectSingleFileDialog dialog = new SelectSingleFileDialog(getShell(), null, true); 
    String[] extensions = {".xmlcatalog", ".xml"}; //$NON-NLS-1$ //$NON-NLS-2$
    dialog.addFilterExtensions(extensions);   
    dialog.create();   
    dialog.getShell().setText(XMLCatalogMessages.UI_LABEL_IMPORT_DIALOG_TITLE);
    dialog.setTitle(XMLCatalogMessages.UI_LABEL_IMPORT_DIALOG_HEADING);
    dialog.setMessage(XMLCatalogMessages.UI_LABEL_IMPORT_DIALOG_MESSAGE);
    dialog.setBlockOnOpen(true);
    int rc = dialog.open();                        
    if (rc == Window.OK)
    {             
      IFile file = dialog.getFile();
      if (file != null)
      {
        String fileName = file.getLocation().toFile().toURI().toString();
        try
        {
            CatalogSet tempResourceSet = new CatalogSet(); 
            ICatalog newCatalog = tempResourceSet.lookupOrCreateCatalog("temp", fileName);       //$NON-NLS-1$
  		      workingUserCatalog.addEntriesFromCatalog(newCatalog); 
        }
        catch (Exception e)
        {
          //TODO... give error message
        }   
      }
      close();
    }
  }
  

  protected void invokeExportDialog()
  {                                                          
    IPath originalFilePath = null;
    IProject[] projects = ResourcesPlugin.getWorkspace().getRoot().getProjects();
    if (projects.length > 0)
    {
      originalFilePath = projects[0].getFullPath().append(".xmlcatalog"); //$NON-NLS-1$
    }
                                         
    SaveAsDialog dialog = new SaveAsDialog(getShell());
    if (originalFilePath != null)
    {
	    IFile originalFile = ResourcesPlugin.getWorkspace().getRoot().getFile(originalFilePath);   
      dialog.setOriginalFile(originalFile); 
    }
    dialog.create();    

    dialog.getShell().setText(XMLCatalogMessages.UI_LABEL_EXPORT_DIALOG_TITLE);
    dialog.setTitle(XMLCatalogMessages.UI_LABEL_EXPORT_DIALOG_HEADING);
    dialog.setMessage(XMLCatalogMessages.UI_LABEL_EXPORT_DIALOG_MESSAGE);

    dialog.setBlockOnOpen(true);
    int rc = dialog.open();                        
    if (rc == Window.OK)
    { 
      IPath path = dialog.getResult();
      if (path != null)
      {                   
        IFile file = ResourcesPlugin.getWorkspace().getRoot().getFile(path);
		String fileName = file.getLocation().toFile().toURI().toString();
        
        // here we save the catalog entries to the selected file      
        try
        {         
          createFileIfRequired(file); 
          workingUserCatalog.setLocation(fileName);
          workingUserCatalog.save();
        }
        catch (Exception ex)
        {                                                                    
          try
          {  
            String title = XMLCatalogMessages.UI_LABEL_CATALOG_SAVE_ERROR;    
            String briefMessage = XMLCatalogMessages.UI_LABEL_CATALOG_COULD_NOT_BE_SAVED;     
            String reason = file.isReadOnly() ?
            		NLS.bind(XMLCatalogMessages.UI_LABEL_FILE_IS_READ_ONLY, fileName) : 
            			NLS.bind(XMLCatalogMessages.ERROR_SAVING_FILE, fileName);
            String details = NLS.bind(XMLCatalogMessages.ERROR_SAVING_FILE, fileName);
                                                               
            ErrorDialog.openError(Display.getCurrent().getActiveShell(), title, briefMessage, createStatus(reason, details));
          }
          catch (Exception ex2)
          {
          }
        } 
        close();
      }
    }
  }
  
  // TODO... This was copied from WindowUtility.  Is there an easier way to create a status object?
  // If not, we should open an eclipse bug or add a similar utility to baseExtensionsUI.
  //
  private static IStatus createStatus(String reason, String msg)
  {
	String pluginId = XMLUIPlugin.getDefault().getBundle().getSymbolicName();    
	MultiStatus multiStatus = new MultiStatus(pluginId, 0, reason, null);
	Status status = new Status(IStatus.ERROR, pluginId, 0, msg, null);
	multiStatus.add(status);
	return multiStatus;
  }   
  

  protected void createFileIfRequired(IFile file)
  {
    try
    {                                
      if (file != null && !file.exists())
      {
        ByteArrayInputStream inputStream = new ByteArrayInputStream(new byte[0]);      
	      file.create(inputStream, true, null);
        //createEmptyXMLCatalog(file);
      }
    }
    catch (Exception e)
    {
    }
  } 
}