/*******************************************************************************
 * 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.properties;

import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.DialogCellEditor;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.SWT;
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.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.ui.views.properties.IPropertyDescriptor;
import org.eclipse.ui.views.properties.IPropertySource;
import org.eclipse.ui.views.properties.PropertyDescriptor;
import org.eclipse.wst.xsd.ui.internal.XSDEditorPlugin;
import org.eclipse.wst.xsd.ui.internal.util.TypesHelper;
import org.eclipse.wst.xsd.ui.internal.util.ViewUtility;
import org.eclipse.wst.xsd.ui.internal.widgets.TypeSection;
import org.eclipse.xsd.XSDSchema;
import org.eclipse.xsd.util.XSDConstants;


public class SimpleTypeUnionPropertySource
  extends BasePropertySource
  implements IPropertySource
{
  /**
   * 
   */
  public SimpleTypeUnionPropertySource()
  {
    super();
  }
  /**
   * @param viewer
   * @param xsdSchema
   */
  public SimpleTypeUnionPropertySource(Viewer viewer, XSDSchema xsdSchema)
  {
    super(viewer, xsdSchema);
  }
  /**
   * @param xsdSchema
   */
  public SimpleTypeUnionPropertySource(XSDSchema xsdSchema)
  {
    super(xsdSchema);
  }
  /* (non-Javadoc)
   * @see org.eclipse.ui.views.properties.IPropertySource#getEditableValue()
   */
  public Object getEditableValue()
  {
    return null;
  }
  /* (non-Javadoc)
   * @see org.eclipse.ui.views.properties.IPropertySource#getPropertyDescriptors()
   */
  public IPropertyDescriptor[] getPropertyDescriptors()
  {
    List list = new ArrayList();
    // Create a descriptor and set a category
    SimpleUnionMemberTypesPropertyDescriptor typeDescriptor = new SimpleUnionMemberTypesPropertyDescriptor(
        XSDConstants.MEMBERTYPES_ATTRIBUTE,
        XSDConstants.MEMBERTYPES_ATTRIBUTE);
    
    typeDescriptor.setLabelProvider(new LabelProvider()
        {
      public String getText(Object element)
      {
        return (String) element;
      }
    });
    list.add(typeDescriptor);
    
    IPropertyDescriptor[] result = new IPropertyDescriptor[list.size()];
    list.toArray(result);
    return result;
  }
  /* (non-Javadoc)
   * @see org.eclipse.ui.views.properties.IPropertySource#getPropertyValue(java.lang.Object)
   */
  public Object getPropertyValue(Object id)
  {
    Object result = null;
    if (id instanceof String)
     {
      if (((String) id).equals(XSDConstants.MEMBERTYPES_ATTRIBUTE))
       {
        result = element.getAttribute((String) id);
        if (result == null)
        { 
          result = "";
        }
        return result;
      }
    }
    return "";
  }
  /* (non-Javadoc)
   * @see org.eclipse.ui.views.properties.IPropertySource#isPropertySet(java.lang.Object)
   */
  public boolean isPropertySet(Object id)
  {
    return false;
  }
  /* (non-Javadoc)
   * @see org.eclipse.ui.views.properties.IPropertySource#resetPropertyValue(java.lang.Object)
   */
  public void resetPropertyValue(Object id)
  {
  }
  /* (non-Javadoc)
   * @see org.eclipse.ui.views.properties.IPropertySource#setPropertyValue(java.lang.Object, java.lang.Object)
   */
  public void setPropertyValue(Object id, Object value)
  {
    if (value == null)
    {
      value = "";
    }
    
    if (value instanceof String)
    {
      String newValue = (String)value;
      if (((String) id).equals(XSDConstants.MEMBERTYPES_ATTRIBUTE))
      { 
        beginRecording("MemberTypes Change", element);
        if (newValue.length() > 0)
        {
          element.setAttribute(XSDConstants.MEMBERTYPES_ATTRIBUTE, (String)value);
        }
        else
        {
          element.removeAttribute(XSDConstants.MEMBERTYPES_ATTRIBUTE);  
        }
        endRecording(element);
      }
    }
    Runnable delayedUpdate = new Runnable()
    {
      public void run()
      {
        if (viewer != null)
          viewer.refresh();
      }
    };
    Display.getCurrent().asyncExec(delayedUpdate);
    
  }

  
  public class SimpleUnionMemberTypesPropertyDescriptor extends PropertyDescriptor
  {
    /**
     * @param id
     * @param displayName
     */
    public SimpleUnionMemberTypesPropertyDescriptor(Object id, String displayName)
    {
      super(id, displayName);
    }
    
    public CellEditor createPropertyEditor(Composite parent)
    {
      CellEditor editor = new SimpleTypeUnionMemberTypesDialogCellEditor(parent);
      if (getValidator() != null)
        editor.setValidator(getValidator());
      return editor;
    }
  }
  
  public class SimpleTypeUnionMemberTypesDialogCellEditor extends DialogCellEditor {

    /**
     * Creates a new Font dialog cell editor parented under the given control.
     * The cell editor value is <code>null</code> initially, and has no 
     * validator.
     *
     * @param parent the parent control
     */
    protected SimpleTypeUnionMemberTypesDialogCellEditor(Composite parent) {
      super(parent);
    }

    /**
     * @see org.eclipse.jface.viewers.DialogCellEditor#openDialogBox(Control)
     */
    protected Object openDialogBox(Control cellEditorWindow)
    {
      Shell shell = Display.getCurrent().getActiveShell();
      
      SimpleContentUniontMemberTypesDialog dialog = new SimpleContentUniontMemberTypesDialog(shell);
      dialog.setBlockOnOpen(true);
      dialog.create();
      
      String value = (String)getValue();

      int result = dialog.open();

      if (result == Window.OK)
       {
        return dialog.getResult();
      }
      return value;
    }

  }

  public class SimpleContentUniontMemberTypesDialog extends org.eclipse.jface.dialogs.Dialog implements SelectionListener
  {
    Table table;
    TypeSection typeSection;
    Button addButton, removeButton;
    org.eclipse.swt.widgets.List memberTypesList;
    
    private String result;
    
    public SimpleContentUniontMemberTypesDialog(Shell shell)
    {
      super(shell);
    }

    protected void configureShell(Shell shell)
    {
      super.configureShell(shell);
    }

    protected void buttonPressed(int buttonId)
    {
      if (buttonId == Dialog.OK)
      {
        StringBuffer sb = new StringBuffer();
        int length = memberTypesList.getItemCount();
        for (int i=0 ; i < length; i++)
        {
          sb.append(memberTypesList.getItem(i));
          if (i < length - 1)
          {
            sb.append(" ");
          }
        }
        result = sb.toString();
      }
      super.buttonPressed(buttonId);
    }

    public String getResult() { return result; }

    //
    // Create the controls
    //
    public Control createDialogArea(Composite parent)
    {
      int tabIndex = 0;
      Composite client = (Composite)super.createDialogArea(parent);
      getShell().setText("Union " + XSDConstants.MEMBERTYPES_ATTRIBUTE); 
      
      Label instructions = new Label(client, SWT.LEFT | SWT.WRAP);
      instructions.setText("Select from the available types and add to the memberTypes list");
      
      Composite columnsComposite = new Composite(client, SWT.NONE);
      GridLayout ccGL = new GridLayout();
      ccGL.verticalSpacing = 0;
      ccGL.horizontalSpacing = 0;
      ccGL.marginHeight = 0;
      ccGL.marginWidth = 0;
      ccGL.makeColumnsEqualWidth = true;
      ccGL.numColumns = 3;
      columnsComposite.setLayout(ccGL);
      
      GridData ccGD = new GridData();
      ccGD.grabExcessHorizontalSpace = true;
      ccGD.horizontalAlignment = GridData.FILL;
      columnsComposite.setLayoutData(ccGD);     
                             
      typeSection = new TypeSection(columnsComposite);
      typeSection.setShowUserComplexType(false);

      typeSection.createClient(columnsComposite);
      typeSection.getSimpleType().setSelection(false);
      typeSection.getSimpleType().addSelectionListener(this);
      typeSection.getUserSimpleType().addSelectionListener(this);
      
      ViewUtility.createHorizontalFiller(columnsComposite, 1);
      
      Label memberListLabel = new Label(columnsComposite, SWT.LEFT);
      memberListLabel.setText("memberTypes value:");
      
      Composite dataComposite = new Composite(client, SWT.NONE);
      GridLayout dcGL = new GridLayout();
      dcGL.verticalSpacing = 0;
      dcGL.marginHeight = 0;
      dcGL.marginWidth = 0;
      dcGL.numColumns = 3;
      dataComposite.setLayout(dcGL);
      
      GridData dcGD = new GridData();
      dcGD.grabExcessHorizontalSpace = true;
      dcGD.grabExcessVerticalSpace = true;
      dataComposite.setLayoutData(dcGD);
      
      table = new Table(dataComposite,
          SWT.SINGLE | SWT.FULL_SELECTION | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER); 
      table.setHeaderVisible(false);
      table.setLinesVisible(true);
      GridData gd2 = new GridData();
      gd2.grabExcessHorizontalSpace = true;
      gd2.grabExcessVerticalSpace = true;
      gd2.horizontalAlignment = GridData.FILL;
      gd2.verticalAlignment = GridData.FILL;
      gd2.heightHint = 200;
      gd2.widthHint = 200;
      table.setLayoutData(gd2);

      // Fill table
      handleSetInput();
      int tableItemCount = table.getItemCount();

      TableColumn tc = new TableColumn(table, SWT.LEFT);
//      tc.setImage(XSDEditorPlugin.getXSDImage("icons/XSDElement.gif"));
      //tc.setText("Available types:");
      tc.setWidth(200);
      tc.setResizable(true);
      
      Composite buttonComposite = new Composite(dataComposite, SWT.NONE);
      GridLayout bcGL = new GridLayout();
      bcGL.numColumns = 1;
      buttonComposite.setLayout(bcGL);
      addButton = new Button(buttonComposite, SWT.PUSH);
      addButton.setText(">");
      addButton.addSelectionListener(this);
      removeButton = new Button(buttonComposite, SWT.PUSH);
      removeButton.setText("<");
      removeButton.addSelectionListener(this);
      
      Composite listComposite = new Composite(dataComposite, SWT.NONE);
      GridLayout mtGL = new GridLayout();
      mtGL.numColumns = 1;
      mtGL.marginHeight = 0;
      mtGL.marginWidth = 0;
      mtGL.horizontalSpacing = 0;
      mtGL.verticalSpacing = 0;
      listComposite.setLayout(mtGL);

      GridData mtGD = new GridData();
      mtGD.grabExcessHorizontalSpace = true;
      mtGD.grabExcessVerticalSpace = true;
      mtGD.verticalAlignment = GridData.FILL;
      mtGD.horizontalAlignment = GridData.FILL;
      listComposite.setLayoutData(mtGD);
      
      memberTypesList = new org.eclipse.swt.widgets.List(listComposite, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
      GridData mtlGD = new GridData();
      mtlGD.grabExcessHorizontalSpace = true;
      mtlGD.grabExcessVerticalSpace = true;
      mtlGD.verticalAlignment = GridData.FILL;
      mtlGD.horizontalAlignment = GridData.FILL;
      mtlGD.heightHint = 200;
      mtlGD.widthHint = 200;
      memberTypesList.setLayoutData(mtlGD);
      
      initializeMemberListContent();
      return client;
    }

    private void initializeMemberListContent()
    {
      String result = element.getAttribute(XSDConstants.MEMBERTYPES_ATTRIBUTE);
      if (result == null)
      {
        return;
      }
      StringTokenizer token = new StringTokenizer(result);
      while (token.hasMoreTokens())
      {
        memberTypesList.add(token.nextToken());
      }
    }
  
    public void widgetSelected(SelectionEvent e)
    {
      if (e.widget == typeSection.getSimpleType() && typeSection.getSimpleType().getSelection())
       {
        populateBuiltInType();
      }
      else if (e.widget == typeSection.getUserSimpleType() && typeSection.getUserSimpleType().getSelection())
       {
        populateUserSimpleType(false);
      }
      else if (e.widget == addButton)
      {
        TableItem[] items = table.getItems();
        int selection = table.getSelectionIndex();
        if (items != null && items.length > 0 && selection >= 0)
        {
          String typeToAdd = items[selection].getData().toString();
          if (memberTypesList.indexOf(typeToAdd) < 0)
          {
            memberTypesList.add(items[selection].getData().toString());
          }
        }
      }
      else if (e.widget == removeButton)
      {
        String[] typesToRemove = memberTypesList.getSelection();
        for (int i=0; i < typesToRemove.length; i++)
        {
          memberTypesList.remove(typesToRemove[i]);
        }
      }
    }
    
    public void widgetDefaultSelected(SelectionEvent e)
    {
    }
    
    public void handleSetInput()
    {
      populateBuiltInType();
    }
    
    public void populateBuiltInType()
    {
      table.removeAll();
      List items = getBuiltInTypeNamesList();
      for (int i = 0; i < items.size(); i++)
       {
        TableItem item = new TableItem(table, SWT.NONE);
        item.setText(items.get(i).toString());
        item.setImage(XSDEditorPlugin.getXSDImage("icons/XSDSimpleType.gif"));
        item.setData(items.get(i));
      }
    }

    public void populateUserSimpleType(boolean showAnonymous)
    {
      table.removeAll();
      if (showAnonymous)
       {
        TableItem anonymousItem = new TableItem(table, SWT.NONE);
        anonymousItem.setText("**anonymous**");
        anonymousItem.setData("**anonymous**");
      }
      List items = getUserSimpleTypeNamesList();
      for (int i = 0; i < items.size(); i++)
       {
        TableItem item = new TableItem(table, SWT.NONE);
        item.setText(items.get(i).toString());
        item.setImage(XSDEditorPlugin.getXSDImage("icons/XSDSimpleType.gif"));
        item.setData(items.get(i));
      }
    }
    
    public java.util.List getBuiltInTypeNamesList()
    {
      TypesHelper helper = new TypesHelper(xsdSchema);
      return helper.getBuiltInTypeNamesList();
    }

    public java.util.List getUserSimpleTypeNamesList()
    {
      TypesHelper helper = new TypesHelper(xsdSchema);
      return helper.getUserSimpleTypeNamesList();
    }
  }
  
  
}