/*******************************************************************************
 * Copyright (c) 2007 Chase Technology Ltd - http://www.chasetechnology.co.uk
 * 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:
 *     Doug Satchwell (Chase Technology Ltd) - initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.xsl.internal.debug.ui.preferences;

import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.jface.viewers.ComboViewer;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.jface.viewers.ViewerSorter;
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.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;
import org.eclipse.wst.xsl.internal.debug.ui.XSLDebugUIPlugin;
import org.eclipse.wst.xsl.launching.IOutputProperty;
import org.eclipse.wst.xsl.launching.IProcessorType;
import org.eclipse.wst.xsl.launching.XSLTRuntime;

public class OutputPreferencePage extends PreferencePage implements IWorkbenchPreferencePage
{
	private ComboViewer cViewer;
	private OutputBlock outputBlock;
	private OutputBlock standardOutputBlock;
	private Map<IProcessorType, Properties> typePropertyMap = new HashMap<IProcessorType, Properties>();
	private Text descriptionText;

	public OutputPreferencePage()
	{
		super();
		setTitle(Messages.getString("OutputPreferencePage.0")); //$NON-NLS-1$
		setDescription(Messages.getString("OutputPreferencePage.1")); //$NON-NLS-1$
	}

	@Override
	protected Control createContents(Composite parent)
	{
		parent = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout(2, false);
		parent.setLayout(layout);

		Group group = new Group(parent, SWT.NONE);
		group.setText(Messages.getString("OutputPreferencePage.2")); //$NON-NLS-1$
		GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true);
		gd.heightHint = 150;
		gd.widthHint = 450;
		gd.horizontalSpan = 2;
		group.setLayoutData(gd);
		group.setLayout(new GridLayout());

		standardOutputBlock = new OutputBlock();
		standardOutputBlock.createControl(group);
		standardOutputBlock.addSelectionChangedListener(new ISelectionChangedListener()
		{
			public void selectionChanged(SelectionChangedEvent event)
			{
				IStructuredSelection selection = (IStructuredSelection) event.getSelection();
				String text = null;
				if (selection != null && selection.getFirstElement() != null)
					text = ((IOutputProperty) selection.getFirstElement()).getDescription();
				descriptionText.setText(text == null ? "" : text); //$NON-NLS-1$
			}
		});
		gd = new GridData(SWT.FILL, SWT.FILL, true, true);
		standardOutputBlock.getControl().setLayoutData(gd);

		group = new Group(parent, SWT.NONE);
		group.setText(Messages.getString("OutputPreferencePage.4")); //$NON-NLS-1$
		gd = new GridData(SWT.FILL, SWT.FILL, true, true);
		gd.horizontalSpan = 2;
		group.setLayoutData(gd);
		group.setLayout(new GridLayout(2, false));

		Label label = new Label(group, SWT.NULL);
		gd = new GridData(SWT.NONE, SWT.CENTER, false, false);
		label.setText(Messages.getString("OutputPreferencePage.5")); //$NON-NLS-1$
		label.setLayoutData(gd);

		Combo combo = new Combo(group, SWT.READ_ONLY | SWT.SINGLE);
		gd = new GridData(SWT.NONE, SWT.CENTER, false, false);
		combo.setLayoutData(gd);

		cViewer = new ComboViewer(combo);
		cViewer.setContentProvider(new IStructuredContentProvider()
		{

			private IProcessorType[] types;

			public Object[] getElements(Object inputElement)
			{
				return types;
			}

			public void dispose()
			{
			}

			public void inputChanged(Viewer viewer, Object oldInput, Object newInput)
			{
				types = (IProcessorType[]) newInput;
			}
		});
		cViewer.setLabelProvider(new LabelProvider()
		{
			@Override
			public String getText(Object element)
			{
				IProcessorType type = (IProcessorType) element;
				return type.getLabel();
			}
		});
		cViewer.setSorter(new ViewerSorter()
		{
			@Override
			public int compare(Viewer viewer, Object e1, Object e2)
			{
				IProcessorType type1 = (IProcessorType) e1;
				IProcessorType type2 = (IProcessorType) e2;
				return type1.getLabel().compareTo(type2.getLabel());
			}
		});
		cViewer.addSelectionChangedListener(new ISelectionChangedListener()
		{
			public void selectionChanged(SelectionChangedEvent event)
			{
				IStructuredSelection selection = (IStructuredSelection) event.getSelection();
				IProcessorType type = (IProcessorType) selection.getFirstElement();
				if (type != null)
				{
					outputBlock.setOutputPropertyValues(type, (Properties) typePropertyMap.get(type));
					outputBlock.setInput(type.getOutputProperties());
				}
				else
				{
					outputBlock.setOutputPropertyValues(type, new Properties());
					outputBlock.setInput(new IOutputProperty[0]);
				}
			}
		});
		cViewer.addFilter(new ViewerFilter()
		{

			@Override
			public boolean select(Viewer viewer, Object parentElement, Object element)
			{
				IProcessorType type = (IProcessorType) element;
				return !type.equals(XSLTRuntime.getProcessorType(XSLTRuntime.JRE_DEFAULT_PROCESSOR_TYPE_ID));
			}
		});

		outputBlock = new OutputBlock();
		outputBlock.createControl(group);
		gd = new GridData(SWT.FILL, SWT.FILL, true, true);
		gd.horizontalSpan = 2;
		outputBlock.getControl().setLayoutData(gd);
		standardOutputBlock.getControl().setLayoutData(gd);
		outputBlock.addSelectionChangedListener(new ISelectionChangedListener()
		{
			public void selectionChanged(SelectionChangedEvent event)
			{
				IStructuredSelection selection = (IStructuredSelection) event.getSelection();
				String text = null;
				if (selection != null && selection.getFirstElement() != null)
				{
					text = ((IOutputProperty) selection.getFirstElement()).getDescription();
				}
				descriptionText.setText(text == null ? "" : text); //$NON-NLS-1$
			}
		});

		descriptionText = new Text(parent, SWT.WRAP | SWT.BORDER | SWT.READ_ONLY | SWT.V_SCROLL);
		gd = new GridData(SWT.FILL, SWT.NONE, true, false);
		gd.horizontalSpan = 2;
		gd.heightHint = 60;
		descriptionText.setLayoutData(gd);

		setInput();

		return parent;
	}

	private void setInput()
	{
		IProcessorType[] types = XSLTRuntime.getProcessorTypes();
		typePropertyMap.clear();
		for (IProcessorType type : types)
		{
			typePropertyMap.put(type, (Properties)type.getOutputPropertyValues().clone());
		}

		IProcessorType jreDefaultType = XSLTRuntime.getProcessorType(XSLTRuntime.JRE_DEFAULT_PROCESSOR_TYPE_ID);
		standardOutputBlock.setOutputPropertyValues(jreDefaultType, (Properties) typePropertyMap.get(jreDefaultType));
		standardOutputBlock.setInput(jreDefaultType.getOutputProperties());

		cViewer.setInput(types);
		cViewer.setSelection(new StructuredSelection(FeaturesPreferencePage.getInitialType()), true);
	}

	public void init(IWorkbench workbench)
	{
	}

	@Override
	protected void performDefaults()
	{
		IProcessorType[] types = XSLTRuntime.getProcessorTypes();
		typePropertyMap.clear();
		for (IProcessorType type : types)
		{
			typePropertyMap.put(type, XSLTRuntime.createDefaultOutputProperties(type.getId()));
		}

		IProcessorType jreDefaultType = XSLTRuntime.getProcessorType(XSLTRuntime.JRE_DEFAULT_PROCESSOR_TYPE_ID);
		standardOutputBlock.setOutputPropertyValues(jreDefaultType, (Properties) typePropertyMap.get(jreDefaultType));
		standardOutputBlock.setInput(jreDefaultType.getOutputProperties());

		cViewer.setInput(types);
		cViewer.setSelection(new StructuredSelection(FeaturesPreferencePage.getInitialType()), true);

		super.performDefaults();
	}

	@Override
	public boolean performOk()
	{
		outputBlock.saveColumnSettings();
		final boolean[] ok = new boolean[1];
		try
		{
			IRunnableWithProgress runnable = new IRunnableWithProgress()
			{
				public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException
				{
					try
					{
						XSLTRuntime.saveOutputPropertyPreferences(typePropertyMap,monitor);
					}
					catch (CoreException e)
					{
						XSLDebugUIPlugin.log(e);
					}
					ok[0] = !monitor.isCanceled();
				}
			};
			XSLDebugUIPlugin.getDefault().getWorkbench().getProgressService().busyCursorWhile(runnable);
		}
		catch (InvocationTargetException e)
		{
			XSLDebugUIPlugin.log(e);
		}
		catch (InterruptedException e)
		{
			XSLDebugUIPlugin.log(e);
		}
		return ok[0];
	}
}