/*******************************************************************************
 * Copyright (c) 2004, 2007 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
 * yyyymmdd bug      Email and other contact information
 * -------- -------- -----------------------------------------------------------
 * 20060728	  151723 mahutch@ca.ibm.com - Mark Hutchinson
 * 20070109   130965 kathy@ca.ibm.com - Kathy Chan
 *******************************************************************************/

package org.eclipse.jst.ws.internal.consumption.ui.preferences;

import java.util.ArrayList;
import java.util.Arrays;

import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.jst.ws.internal.consumption.ui.ConsumptionUIMessages;
import org.eclipse.jst.ws.internal.consumption.ui.plugin.WebServiceConsumptionUIPlugin;
import org.eclipse.jst.ws.internal.consumption.ui.wsrt.WebServiceRuntimeExtensionUtils2;
import org.eclipse.jst.ws.internal.ui.common.UIUtils;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;
import org.eclipse.wst.command.internal.env.core.selection.SelectionListChoices;


/**
 *
 */
public class ServerRuntimePreferencePage extends PreferencePage implements IWorkbenchPreferencePage, Listener 
{
	private String pluginId_= "org.eclipse.jst.ws.consumption.ui";
	
	/* CONTEXT_ID SRPF0001 for server preference on the server runtime preference page */
	private String INFOPOP_SRPF_SERVER_PREF = pluginId_ + ".SRPF0001";
	private Combo server_;

	/* CONTEXT_ID SRPF0002 for runtime preference on the server runtime preference page */
	private String INFOPOP_SRPF_RUNTIME_PREF = pluginId_ + ".SRPF0002";
	private Combo runtime_;	

	/* CONTEXT_ID SRPF0003 for J2EE version preference on the server runtime preference page */
    /*
	private String INFOPOP_SRPF_J2EE_PREF = pluginId_ + ".SRPF0003";
	private Combo j2eeVersion_;
    */
	
	SelectionListChoices serverToRuntimeToJ2EE_;
	
	public void init(IWorkbench workbench)   { }	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite)
	 */
	protected Control createContents(Composite parent) 
	{
	  UIUtils uiUtils = new UIUtils(pluginId_);
	  
	  Composite page = new Composite(parent, SWT.NONE);
	  GridLayout gl = new GridLayout();
	  gl.numColumns = 2;
	  page.setLayout(gl);
	  GridData gd = new GridData(GridData.VERTICAL_ALIGN_FILL | GridData.HORIZONTAL_ALIGN_FILL);
	  page.setLayoutData(gd);
	  
	  server_ = uiUtils.createCombo(page,ConsumptionUIMessages.LABEL_SERVERS_LIST,
			  ConsumptionUIMessages.TOOLTIP_SRPF_COMBO_SERVER,
									INFOPOP_SRPF_SERVER_PREF,
									SWT.SINGLE|SWT.BORDER|SWT.READ_ONLY);
	  
	  runtime_ = uiUtils.createCombo(page,ConsumptionUIMessages.LABEL_RUNTIMES_LIST,
			  ConsumptionUIMessages.TOOLTIP_SRPF_COMBO_RUNTIME,
									 INFOPOP_SRPF_RUNTIME_PREF,
									 SWT.SINGLE|SWT.BORDER|SWT.READ_ONLY);

/*
	  j2eeVersion_ = uiUtils.createCombo(page,ConsumptionUIMessages.LABEL_J2EE_VERSION,
			  ConsumptionUIMessages.TOOLTIP_SRPF_COMBO_J2EE,
			                             INFOPOP_SRPF_J2EE_PREF,
			                             SWT.SINGLE|SWT.BORDER|SWT.READ_ONLY);	  
*/

	  initializeValues();
	  startListening();
	  applyDialogFont(page);
	  return page;
	}

	private void initializeValues()
	{
		PersistentServerRuntimeContext context = WebServiceConsumptionUIPlugin.getInstance().getServerRuntimeContext();
        serverToRuntimeToJ2EE_ = WebServiceRuntimeExtensionUtils2.getServerToRuntimeToJ2EE();


		setServerItems(serverToRuntimeToJ2EE_.getList().getList());
		String defaultServerText = context.getServerFactoryId();
		serverToRuntimeToJ2EE_.getList().setSelectionValue(defaultServerText);
		setServerSelection(defaultServerText);
		
		setRuntimeItems(serverToRuntimeToJ2EE_.getChoice().getList().getList());
		String defaultRuntimeText = context.getRuntimeId();
		serverToRuntimeToJ2EE_.getChoice().getList().setSelectionValue(defaultRuntimeText);
		setRuntimeSelection(defaultRuntimeText);			
	}
	
	public void handleEvent(Event event)
	{
		if (server_ == event.widget)
		{
			handleServerSelected();
		}
		else if (runtime_ == event.widget)
		{
			handleRuntimeSelected();
		}
	}

	private void handleServerSelected()
	{
		stopListening();
		
		String selectedText = getServerSelection();
		serverToRuntimeToJ2EE_.getList().setSelectionValue(selectedText);
		
		// TODO (see bug 116025) - Since the server and runtime set in serverToRuntimeToJ2EE is just the list of 
		// all servers and all runtime (i.e. no validation checking is being done), no need to update the runtime,
		// just keep the original value.
		//Update the runtime -------------------------------
//		setRuntimeItems(serverToRuntimeToJ2EE_.getChoice().getList().getList());
//		if (serverToRuntimeToJ2EE_.getChoice().getList().getList().length > 0)
//		  serverToRuntimeToJ2EE_.getChoice().getList().setIndex(0);
//		
//		String newRuntimeText = serverToRuntimeToJ2EE_.getChoice().getList().getSelection();
//		if (newRuntimeText!=null && newRuntimeText.length()>0)
//			setRuntimeSelection(newRuntimeText);		
		
		startListening();
	}
	
	private void handleRuntimeSelected()
	{
		stopListening();
		
		String selectedText = getRuntimeSelection();
		serverToRuntimeToJ2EE_.getChoice().getList().setSelectionValue(selectedText);						
		startListening();		
	}
	

    /**
	 * Does anything necessary because the default button has been pressed.
	*/
	protected void performDefaults()
	{
	  super.performDefaults();
	  setToDefaults();
	}
	
	private void setToDefaults()
	{
		PersistentServerRuntimeContext context = WebServiceConsumptionUIPlugin.getInstance().getServerRuntimeContext();

		String defaultServerText = context.getDefaultServerFactoryId();
		serverToRuntimeToJ2EE_.getList().setSelectionValue(defaultServerText);
		setServerSelection(defaultServerText);
		
		setRuntimeItems(serverToRuntimeToJ2EE_.getChoice().getList().getList());
		String defaultRuntimeText = context.getDefaultRuntimeId();
		serverToRuntimeToJ2EE_.getChoice().getList().setSelectionValue(defaultRuntimeText);
		setRuntimeSelection(defaultRuntimeText);
	}

	/**
	 * Do anything necessary because the OK button has been pressed.
	 *  @return whether it is okay to close the preference page
	 */
	public boolean performOk()
	{
	  storeValues();
	  return true;
	}

	private void storeValues()
	{
      PersistentServerRuntimeContext context = WebServiceConsumptionUIPlugin.getInstance().getServerRuntimeContext();
      context.setServerFactoryId(getServerSelection());
      context.setRuntimeId(getRuntimeSelection());      
	}
	
	protected void performApply()
	{
	  performOk();
	}
	
  	
	private void startListening()
	{
	  server_.addListener(SWT.Selection,this);
	  runtime_.addListener(SWT.Selection,this);
	}

	private void stopListening()
	{
	  server_.removeListener(SWT.Selection, this);
	  runtime_.removeListener(SWT.Selection, this);
	}

	private void setServerItems(String[] factoryIds)
	{
	  
	  if (factoryIds != null)
	  {
	    ArrayList serverLabelsList = new ArrayList();
		  for (int i=0;i<factoryIds.length;i++)
		  {
			  //String thisServerLabel = WebServiceServerRuntimeTypeRegistry.getInstance().getServerLabel(factoryIds[i]);
        String thisServerLabel = WebServiceRuntimeExtensionUtils2.getServerLabelById(factoryIds[i]);
			  if (thisServerLabel!=null && thisServerLabel.length()>0)
			  {
			    serverLabelsList.add(thisServerLabel);
			  }
			
		  }
		  String[] serverLabels = convertToStringArray(serverLabelsList.toArray()); 
		  server_.setItems(serverLabels);
	  }
		
	}
	
	private void setRuntimeItems(String[] ids)
	{
	  if (ids != null)
	  {
		String[] runtimeLabels = new String[ids.length];
		for (int i=0;i<ids.length;i++)
		{
		  //runtimeLabels[i] = WebServiceServerRuntimeTypeRegistry.getInstance().getRuntimeLabel(ids[i]);
      runtimeLabels[i] = WebServiceRuntimeExtensionUtils2.getRuntimeLabelById(ids[i]);
		}

		//sort the labels (bug 151723)
		Arrays.sort(runtimeLabels);
		runtime_.setItems(runtimeLabels);
	  }
		
	}
	
    /*
    private void setJ2EEItems(String[] versions)
    {
      if (versions != null)
      {
        String[] j2eeLabels = new String[versions.length];
        for (int i = 0; i < versions.length; i++)
        {
          String label = J2EEUtils.getLabelFromJ2EEVersion(versions[i]);
          if (label != null && label.length()>0)
            j2eeLabels[i] = label;
          else
            j2eeLabels[i] = ConsumptionUIMessages.LABEL_NA;
        }
        j2eeVersion_.setItems(j2eeLabels);
        
        //Disable the combo if it has no items.
        if (j2eeLabels.length > 0)
          j2eeVersion_.setEnabled(true);
        else
          j2eeVersion_.setEnabled(false);
      }
        
    }
    */
	
	private String getServerSelection()
	{
	  String serverLabel = server_.getText();
	  //return WebServiceServerRuntimeTypeRegistry.getInstance().getServerFactoryId(serverLabel);
    return WebServiceRuntimeExtensionUtils2.getServerFactoryId(serverLabel);
	}
	
	private String getRuntimeSelection()
	{
      String runtimeLabel = runtime_.getText();
	  //return WebServiceServerRuntimeTypeRegistry.getInstance().getRuntimeId(runtimeLabel);
      return WebServiceRuntimeExtensionUtils2.getRuntimeId(runtimeLabel);
	}
	
    /*
	private String getJ2EESelection()
	{
	  String j2eeLabel = j2eeVersion_.getText();
	  return J2EEUtils.getJ2EEVersionFromLabel(j2eeLabel);		
	}
    */
	
	private void setServerSelection(String factoryId)
	{
		//String label = WebServiceServerRuntimeTypeRegistry.getInstance().getServerLabel(factoryId);
    String label = WebServiceRuntimeExtensionUtils2.getServerLabelById(factoryId);
		setSelection(server_,label);
	}
	
	private void setRuntimeSelection(String id)
	{
		//String label = WebServiceServerRuntimeTypeRegistry.getInstance().getRuntimeLabel(id);
    String label = WebServiceRuntimeExtensionUtils2.getRuntimeLabelById(id);
		setSelection(runtime_,label);		
	}
	
    /*
	private void setJ2EESelection(String version)
	{
	  String label = J2EEUtils.getLabelFromJ2EEVersion(version);
      setSelection(j2eeVersion_, label);
	}
    */
	
	private void setSelection(Combo combo, String s)
	{
		String[] items = combo.getItems();
		for (int i=0; i<items.length; i++)
		{
			if (items[i].equals(s))
			{
				combo.select(i);
				return;
			}
		}
	}
	
	private String[] convertToStringArray(Object[] a)
	{
	  if (a==null) return new String[0];
	  	
	  int length = a.length;
	  String[] sa = new String[length];
	  for (int i=0; i<length; i++)
	  {
	  	Object obj = a[i];
	  	if (obj instanceof String)
	  	{
	      sa[i] = (String)obj;
	  	}
	  }
	  return sa;
	}	
}