/* Main.java
   Copyright (C) 2008 Red Hat, Inc.

This file is part of IcedTea.

IcedTea 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, version 2.

IcedTea is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
IcedTea; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is making a
combined work based on this library. Thus, the terms and conditions of the GNU
General Public License cover the whole combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent modules, and
to copy and distribute the resulting executable under terms of your choice,
provided that you also meet, for each linked independent module, the terms and
conditions of the license of that module. An independent module is a module
which is not derived from or based on this library. If you modify this library,
you may extend this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this exception
statement from your version.
*/

package net.adoptopenjdk.icedteaweb.client.parts.about;

import net.adoptopenjdk.icedteaweb.IcedTeaWebConstants;
import net.adoptopenjdk.icedteaweb.logging.Logger;
import net.adoptopenjdk.icedteaweb.logging.LoggerFactory;
import net.adoptopenjdk.icedteaweb.ui.swing.ScreenFinder;
import net.adoptopenjdk.icedteaweb.ui.swing.SwingUtils;
import net.sourceforge.jnlp.util.docprovider.TextsProvider;
import net.sourceforge.jnlp.util.docprovider.formatters.formatters.HtmlFormatter;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.Locale;

import static net.adoptopenjdk.icedteaweb.i18n.Translator.R;

public final class AboutDialog extends JPanel implements Runnable, ActionListener {

    private final static Logger LOG = LoggerFactory.getLogger(AboutDialog.class);

    private static final String about_url_stub = "/net/sourceforge/jnlp/resources/about";
    private static final String authors_url = "/net/sourceforge/jnlp/resources/AUTHORS.html";
    private static final String changelog_url = "/net/sourceforge/jnlp/resources/ChangeLog.html";
    private static final String copying_url = "/net/sourceforge/jnlp/resources/COPYING.html";
    private static final String news_url = "/net/sourceforge/jnlp/resources/NEWS.html";

    private final  String app;

    private final JDialog frame;
    private JPanel contentPane;
    //singletons to not load/generate them all around
    private static HTMLPanel aboutPanel, authorsPanel, newsPanel, changelogPanel, copyingPanel, helpPanel;
    private final JButton aboutButton, authorsButton, newsButton, changelogButton, copyingButton, helpButton;

    private final URL res_authors = getClass().getResource(authors_url);
    private final URL res_news = getClass().getResource(news_url);
    private final URL res_changelog = getClass().getResource(changelog_url);
    private final URL res_copying = getClass().getResource(copying_url);

    public static enum ShowPage{
        ABOUT /*default*/,
        AUTHORS,
        NEWS,
        CHANGELOG,
        LICENSE,
        HELP
        
    }
    private  AboutDialog(boolean modal, String app, ShowPage showPage) {
        super(new GridBagLayout());
        this.app = app;
        frame = new JDialog((Frame) null, R("AboutDialogueTabAbout") + " IcedTea-Web", modal);
        frame.setName("AboutDialog");
        SwingUtils.info(frame);
        frame.setContentPane(this);
        frame.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);

        aboutButton = new JButton( R("AboutDialogueTabAbout"));
        aboutButton.addActionListener(this);

        authorsButton = new JButton(R("AboutDialogueTabAuthors"));
        authorsButton.addActionListener(this);

        newsButton = new JButton( R("AboutDialogueTabNews"));
        newsButton.addActionListener(this);

        changelogButton = new JButton(R("AboutDialogueTabChangelog"));
        changelogButton.addActionListener(this);

        copyingButton = new JButton(R("AboutDialogueTabGPLv2"));
        copyingButton.addActionListener(this);
        
        helpButton = new JButton(R("APPEXTSECguiPanelHelpButton"));
        helpButton.addActionListener(this);

        
        switch (showPage) {
            case ABOUT:
                actionPerformed(new ActionEvent(aboutButton, 0, ""));
                break;
            case AUTHORS:
                actionPerformed(new ActionEvent(authorsButton, 0, ""));
                break;
            case CHANGELOG:
                actionPerformed(new ActionEvent(changelogButton, 0, ""));
                break;
            case HELP:
                actionPerformed(new ActionEvent(helpButton, 0, ""));
                break;
            case LICENSE:
                actionPerformed(new ActionEvent(copyingButton, 0, ""));
                break;
            case NEWS:
                actionPerformed(new ActionEvent(newsButton, 0, ""));
                break;

            default:
                actionPerformed(new ActionEvent(aboutButton, 0, ""));
        }
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        Object action = e.getSource();

        if (action.equals(aboutButton)) {
            if (aboutPanel == null) {
                String lang = Locale.getDefault().getLanguage();
                URL about_lang;
                try {
                    about_lang = getClass().getResource(about_url_stub + "_" + lang + ".html");
                    about_lang.openStream().close();
                } catch (Exception ex) {
                    LOG.error(IcedTeaWebConstants.DEFAULT_ERROR_MESSAGE, ex);
                    //probably unknown locale, switch to english
                    about_lang = getClass().getResource(about_url_stub + "_en.html");
                }
                aboutPanel = new HTMLPanel(about_lang);
            }
            contentPane = aboutPanel;
        } else if (action.equals(authorsButton)) {
            if (authorsPanel == null) {
                authorsPanel = new HTMLPanel(res_authors);
            }
            contentPane = authorsPanel;
        } else if (action.equals(newsButton)) {
            if (newsPanel == null) {
                newsPanel = new HTMLPanel(res_news);
            }
            contentPane = newsPanel;
        } else if (action.equals(changelogButton)) {
            if (changelogPanel == null) {
                changelogPanel = new HTMLPanel(res_changelog);
            }
            contentPane = changelogPanel;
        } else if (action.equals(copyingButton)) {
            if (copyingPanel == null) {
                copyingPanel = new HTMLPanel(res_copying);
            }
            contentPane = copyingPanel;
        } else if (action.equals(helpButton)) {
            if (helpPanel == null) {
                //copy logo and generate resources to tmp dir
                try {
                    File f = File.createTempFile("icedtea-web", "help");
                    f.delete();
                    f.mkdir();
                    f.deleteOnExit();
                    TextsProvider.generateRuntimeHtmlTexts(f);
                    //detect running application
                    File target = new File(f, TextsProvider.ITW + "." + HtmlFormatter.SUFFIX);
                    if (app != null) {
                        target = new File(f, app + "." + HtmlFormatter.SUFFIX);
                    }
                    helpPanel = new InternalHTMLPanel(target.toURI().toURL());
                } catch (IOException ex) {
                    LOG.error(IcedTeaWebConstants.DEFAULT_ERROR_MESSAGE, ex);
                }
            }
            contentPane = helpPanel;
        }

        layoutWindow();
    }

    private void layoutWindow() {
        this.removeAll();

        GridBagConstraints gbc = new GridBagConstraints();

        gbc.fill = GridBagConstraints.BOTH;
        gbc.gridy = 0;
        gbc.gridx = 0;
        gbc.gridwidth = 6;
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;
        this.add(contentPane, gbc);

        gbc.gridy = 1;
        gbc.gridx = 0;
        gbc.gridwidth = 1;
        gbc.ipady = 16;
        this.add(aboutButton, gbc);

        gbc.gridx = 1;
        this.add(authorsButton, gbc);

        gbc.gridx = 2;
        this.add(newsButton, gbc);

        gbc.gridx = 3;
        this.add(changelogButton, gbc);

        gbc.gridx = 4;
        this.add(copyingButton, gbc);
        
        gbc.gridx = 5;
        this.add(helpButton, gbc);

        Dimension contentSize = new Dimension(640, 480);
        contentPane.setMinimumSize(contentSize);
        contentPane.setPreferredSize(contentSize);
        contentPane.setBorder(new EmptyBorder(0, 0, 8, 0));

        this.setBorder(new EmptyBorder(8, 8, 8, 8));

        frame.pack();
    }

    @Override
    public void run() {
        layoutWindow();
        ScreenFinder.centerWindowsToCurrentScreen(frame);
        frame.setVisible(true);
    }

    public static void display(String app) {
        display(false, app);
    }

    public static void display(boolean modal, String app) {
        display(modal, app, ShowPage.ABOUT);
    }
    
    public static void display(boolean modal, String app, ShowPage showPage) {
        SwingUtils.invokeLater(new AboutDialog(modal, app, showPage));
    }
}

