/*
 *  WelcomeScreen.java
 *  Eisenkraut
 *
 *  Copyright (c) 2004-2016 Hanns Holger Rutz. All rights reserved.
 *
 *  This software is published under the GNU General Public License v3+
 *
 *
 *	For further information, please contact Hanns Holger Rutz at
 *	contact@sciss.de
 */

package de.sciss.eisenkraut.gui;

import de.sciss.common.BasicWindowHandler;
import de.sciss.eisenkraut.Main;

import javax.swing.*;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URI;

/**
 *  A new frame is created and
 *  opened that displays a welcome
 *  message to the new user
 *  (whenever preferences are absent
 *  upon application launch).
 */
@SuppressWarnings("serial")
public class WelcomeScreen
extends JFrame
implements HyperlinkListener
{
    private final JEditorPane		ggContent;
    protected final JButton			ggClose;
    protected final WelcomeScreen	welcome		= this;

    private static final String htmlWelcome1 =
        "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\">"+
        "<html><head><style type=\"text/css\"><!--\n"+
        "body { padding:20px; }\n"+
        "em { font-weight:bold; font-style:normal; }\n"+
        "a { color:white;font-weight:bold; }\n"+
        "p { font-family:\"Lucida Grande\" Helvetica sans-serif;font-size:14pt;padding:4pt 4pt 4pt 4pt;margin:0; }\n"+
        "--></style></head><body><table><tr><td valign=\"top\">";

    private static final String htmlWelcome2 =
        "<p>This is a beta version. <B>BETA</B> means it "+
        "still contains a lot of bugs that can possibly damage your files. Use this at your own risk!</p>"+
        "<p>This screen pops up because no valid "+
        "preferences file was found, which suggests that you start this application for the first time. Please take a few "+
        "minutes to read the <EM>README.md</EM> file and the introductory part of the manual. As a first step before doing "+
        "anything else, you should adjust your preferences. The preferences pane will show up when you "+
        "close this window.</p>"+
        "<p>This software is free software; you can redistribute it and/or "+
        "modify it under the terms of the GNU General Public License "+
        "as published by the Free Software Foundation; either "+
        "version 2, june 1991 of the License, or (at your option) any later version.</p>"+
        "<p>This software is distributed in the hope that it will be useful, "+
        "but <strong>WITHOUT ANY WARRANTY</strong>; without even the implied warranty of "+
        "<strong>MERCHANTABILITY</strong> or <strong>FITNESS FOR A PARTICULAR PURPOSE</strong>. See the GNU "+
        "General Public License for more details.</p>"+
        "</td></tr></table></body></html>";

    /**
     *  Create and open welcome screen. This
     *  is in the debug package because it's likely
     *  to change in a future version.
     *
     *  @param  root	application root
     */
    public WelcomeScreen( final Main root )
    {
        super( "Welcome to " + root.getName() );

        final Container cp = getContentPane();
        String			img = "";

        try {
            img = "<IMG SRC=\"" + new File( new File( "help" ), "application.png" ).getAbsoluteFile().toURI().toURL() +
            "\" ALT=\"\">";
        } catch( MalformedURLException e ) { /* ignore */ }

        System.err.println( img );

        ggContent = new JEditorPane( "text/html", htmlWelcome1 + img + "</td><td><H1>Welcome to " +
            root.getName() + "</H1>" + htmlWelcome2 );
        ggContent.setEditable( false );
        ggContent.addHyperlinkListener( this );
        cp.add( ggContent, BorderLayout.CENTER );
        final Action closeAction = new AbstractAction( "- Close -" ) {
            public void actionPerformed( ActionEvent e )
            {
                welcome.setVisible( false );
                welcome.dispose();
                root.getMenuFactory().showPreferences();
            }
        };
        ggClose = new JButton( closeAction );
        cp.add( ggClose, BorderLayout.SOUTH );
        addWindowListener( new WindowAdapter() {
            public void windowClosing( WindowEvent e )
            {
                ggClose.doClick( 150 );
            }
        });
        setSize( 640, 480 );
        setLocationRelativeTo( null );

        setVisible( true );
        toFront();
    }

    // --------- HyperlinkListener interface ---------

    public void hyperlinkUpdate( HyperlinkEvent e )
    {
        if( e.getEventType() == HyperlinkEvent.EventType.ACTIVATED ) {
            try {
                final URI uri = e.getURL().toURI();
                Desktop.getDesktop().browse(uri);
            }
            catch( Exception e1 ) {
                BasicWindowHandler.showErrorDialog( this, e1, getTitle() );
            }
        }
    }
}