/*******************************************************************************
 * Copyright (c) 2014 Jeff Martin.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Jeff Martin - initial API and implementation
 ******************************************************************************/
package cuchaz.enigma.gui;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.PrintWriter;
import java.io.StringWriter;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.WindowConstants;

import cuchaz.enigma.Constants;

public class CrashDialog
{
	private static CrashDialog m_instance = null;
	
	private JFrame m_frame;
	private JTextArea m_text;
	
	private CrashDialog( JFrame parent )
	{
		// init frame
		m_frame = new JFrame( Constants.Name + " - Crash Report" );
		final Container pane = m_frame.getContentPane();
		pane.setLayout( new BorderLayout() );
		
		JLabel label = new JLabel( Constants.Name + " has crashed! =(" );
		label.setBorder( BorderFactory.createEmptyBorder( 10, 10, 10, 10 ) );
		pane.add( label, BorderLayout.NORTH );
		
		// report panel
		m_text = new JTextArea();
		m_text.setTabSize( 2 );
		pane.add( new JScrollPane( m_text ), BorderLayout.CENTER );
		
		// buttons panel
		JPanel buttonsPanel = new JPanel();
		FlowLayout buttonsLayout = new FlowLayout();
		buttonsLayout.setAlignment( FlowLayout.RIGHT );
		buttonsPanel.setLayout( buttonsLayout );
		buttonsPanel.add( GuiTricks.unboldLabel( new JLabel( "If you choose exit, you will lose any unsaved work." ) ) );
		JButton ignoreButton = new JButton( "Ignore" );
		ignoreButton.addActionListener( new ActionListener( )
		{
			@Override
			public void actionPerformed( ActionEvent event )
			{
				// close (hide) the dialog
				m_frame.setVisible( false );
			}
		} );
		buttonsPanel.add( ignoreButton );
		JButton exitButton = new JButton( "Exit" );
		exitButton.addActionListener( new ActionListener( )
		{
			@Override
			public void actionPerformed( ActionEvent event )
			{
				// exit enigma
				System.exit( 1 );
			}
		} );
		buttonsPanel.add( exitButton );
		pane.add( buttonsPanel, BorderLayout.SOUTH );
		
		// show the frame
		m_frame.setSize( 600, 400 );
		m_frame.setLocationRelativeTo( parent );
		m_frame.setDefaultCloseOperation( WindowConstants.DO_NOTHING_ON_CLOSE );
	}
	
	public static void init( JFrame parent )
	{
		m_instance = new CrashDialog( parent );
	}
	
	public static void show( Throwable ex )
	{
		// get the error report
		StringWriter buf = new StringWriter();
		ex.printStackTrace( new PrintWriter( buf ) );
		String report = buf.toString();
		
		// show it!
		m_instance.m_text.setText( report );
		m_instance.m_frame.doLayout();
		m_instance.m_frame.setVisible( true );
	}
}