/*******************************************************************************
 * 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.xsd.ui.internal.wizards;

import java.io.ByteArrayInputStream;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Preferences;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.part.FileEditorInput;
import org.eclipse.ui.part.ISetSelectionTarget;
import org.eclipse.wst.sse.core.preferences.CommonModelPreferenceNames;
import org.eclipse.wst.xml.core.XMLModelPlugin;
import org.eclipse.wst.xsd.ui.internal.XSDEditorPlugin;


public class NewXSDWizard extends Wizard implements INewWizard
{
  private XSDNewFilePage newFilePage;
  private IStructuredSelection selection;
  private IWorkbench workbench;

  public NewXSDWizard()
  {   
  }

  public void init(IWorkbench aWorkbench, IStructuredSelection aSelection)
  {
    this.selection = aSelection;
    this.workbench = aWorkbench;

    this.setDefaultPageImageDescriptor(ImageDescriptor.createFromFile(XSDEditorPlugin.class, "icons/NewXSD.gif"));
    this.setWindowTitle(XSDEditorPlugin.getXSDString("_UI_WIZARD_CREATE_XSD_MODEL_TITLE"));
  }

  public void addPages()
  {
    newFilePage = new XSDNewFilePage(selection);
    addPage(newFilePage);
  }

  public boolean performFinish()
  {
    IFile file = newFilePage.createNewFile();
    
    //
    // Get the xsd schema name from the full path name
    //   e.g. f:/b2b/po.xsd => schema name = po
    //
    IPath iPath = file.getFullPath().removeFileExtension();
    // String schemaName = iPath.lastSegment();
    String schemaName = iPath.lastSegment();
    String schemaPrefix = "tns";
    String prefixForSchemaNamespace = "";
    String schemaNamespaceAttribute = "xmlns";
    if (XSDEditorPlugin.getPlugin().isQualifyXMLSchemaLanguage())
    {
      // Added this if check before disallowing blank prefixes in the preferences...
      // Can take this out.  See also XSDEditor
      if (XSDEditorPlugin.getPlugin().getXMLSchemaPrefix().trim().length() > 0)
      {
        prefixForSchemaNamespace = XSDEditorPlugin.getPlugin().getXMLSchemaPrefix() + ":";
        schemaNamespaceAttribute += ":" + XSDEditorPlugin.getPlugin().getXMLSchemaPrefix();
      }
    }
    
    Preferences preference = XMLModelPlugin.getDefault().getPluginPreferences();
	String charSet = preference.getString(CommonModelPreferenceNames.OUTPUT_CODESET);
     if (charSet == null || charSet.trim().equals(""))
    {
    	charSet = "UTF-8";
    }

    String newContents = "<?xml version=\"1.0\" encoding=\"" + charSet + "\"?>\n";
     
    String defaultTargetURI = XSDEditorPlugin.getPlugin().getXMLSchemaTargetNamespace();
    newContents += "<" + prefixForSchemaNamespace + "schema " + schemaNamespaceAttribute + "=\"http://www.w3.org/2001/XMLSchema\" targetNamespace=\"" + defaultTargetURI + schemaName + "\" xmlns:" + schemaPrefix + "=\""+ defaultTargetURI + schemaName + "\">\n</"+prefixForSchemaNamespace+"schema>";

    try
    {
      byte[] bytes = newContents.getBytes(charSet);
      ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
      
      file.setContents(inputStream,true,false,null);
      inputStream.close();
    }
    catch (Exception e)
    {
//      XSDEditorPlugin.getPlugin().getMsgLogger().write("Error writing default content:\n" + newContents);      
//      XSDEditorPlugin.getPlugin().getMsgLogger().write(e);
    }

    if (file != null)
    {
      revealSelection(new StructuredSelection(file));
    }
    
    openEditor(file);

    return true;
  }

  private void revealSelection(final ISelection selection)
  {
    if (selection != null)
    {
      IWorkbench workbench = XSDEditorPlugin.getPlugin().getWorkbench();
      final IWorkbenchWindow workbenchWindow = workbench.getActiveWorkbenchWindow();
      final IWorkbenchPart focusPart = workbenchWindow.getActivePage().getActivePart();
      if (focusPart instanceof ISetSelectionTarget)
      {
        Display.getCurrent().asyncExec
        (new Runnable()
            {
          public void run()
          {
            ((ISetSelectionTarget)focusPart).selectReveal(selection);
          }
        });
      }
    }
  }

  public void openEditor(final IFile iFile)
  {
    if (iFile != null)
    {
      IWorkbench workbench = XSDEditorPlugin.getPlugin().getWorkbench();
      final IWorkbenchWindow workbenchWindow = workbench.getActiveWorkbenchWindow();

      Display.getDefault().asyncExec
      (new Runnable()
          {
        public void run()
        {
          try
          {
            IEditorPart editorPart = workbenchWindow.getActivePage().openEditor(new FileEditorInput(iFile), XSDEditorPlugin.XSD_EDITOR_ID);
          }
          catch (PartInitException ex)
          {
          }
        }
      });
    }
  }
  
}