/* FirefoxProfilesOperator.java
Copyright (C) 2011,2012 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
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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
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 */

package net.sourceforge.jnlp.browsertesting.browsers.firefox;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.IOException;
import java.nio.channels.FileChannel;
import net.sourceforge.jnlp.ServerAccess;

/**
 * This class is able to backup and restore firefox profiles.
 *
 */
public class FirefoxProfilesOperator {

    private File backupDir;
    private File sourceDir;
    private boolean backuped = false;
    private FilenameFilter firefoxProfilesFilter = new FilenameFilter() {

        @Override
        public boolean accept(File dir, String name) {
            return name.endsWith(".default") || name.equals("profiles.ini");
        }
    };


    public void backupProfiles() throws IOException {
        if (backuped) {
            return;
        }
        sourceDir = new File(System.getProperty("user.home") + "/.mozilla/firefox/");
        File f = File.createTempFile("backupedFirefox_", "_profiles.default");
        f.delete();
        f.mkdir();
        backupDir = f;
        String message = "Backuping firefox profiles from " + sourceDir.getAbsolutePath() + " to " + backupDir.getAbsolutePath();
        ServerAccess.logOutputReprint(message);
        copyDirs(sourceDir, backupDir, firefoxProfilesFilter);
        backuped = true;
        Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    restoreProfiles();
                } catch (Exception ex) {
                    ServerAccess.logException(ex);
                }
            }
        }));

    }

    public void restoreProfiles() throws IOException {
        if (!backuped) {
            return;
        }
        try {
            removeProfiles();
        } catch (Exception ex) {
            ServerAccess.logException(ex);
        }
        String message = ("Restoring all firefox profiles in " + sourceDir.getAbsolutePath() + " from in " + backupDir.getAbsolutePath());
        ServerAccess.logOutputReprint(message);
        copyDirs(backupDir, sourceDir, firefoxProfilesFilter);

    }

    public void removeProfiles() throws IOException {
        if (!backuped) {
            return;
        }
        String message = ("Removing all firefox profiles from " + sourceDir.getAbsolutePath() + " backup avaiable in " + backupDir.getAbsolutePath());
        ServerAccess.logOutputReprint(message);
        File[] oldProfiles = sourceDir.listFiles(firefoxProfilesFilter);
        for (File file : oldProfiles) {
            deleteRecursively(file);

        }

    }

    private void copyDirs(File sourceDir, File backupDir, FilenameFilter firefoxProfilesFilter) throws IOException {
        File[] profiles = sourceDir.listFiles(firefoxProfilesFilter);
        for (File file : profiles) {
            copyRecursively(file, backupDir);
        }
    }

    public static void copyFile(File from, File to) throws IOException {
        FileInputStream is = new FileInputStream(from);
        FileOutputStream fos = new FileOutputStream(to);
        FileChannel f = is.getChannel();
        try (FileChannel f2 = fos.getChannel()) {
            f.transferTo(0, f.size(), f2);
        } finally {
            f.close();
        }
    }

    public static void deleteRecursively(File f) throws IOException {
        if (f.isDirectory()) {
            for (File c : f.listFiles()) {
                deleteRecursively(c);
            }
        }
        boolean d = true;
        d = f.delete();
        if (!d) {
            throw new IOException("Failed to delete file: " + f);
        }
    }

    public static void copyRecursively(File srcFileDir, File destDir) throws IOException {
        if (srcFileDir.isDirectory()) {
            File nwDest = new File(destDir, srcFileDir.getName());
            nwDest.mkdir();
            for (File c : srcFileDir.listFiles()) {
                copyRecursively(c, nwDest);
            }
        } else {
            copyFile(srcFileDir, new File(destDir, srcFileDir.getName()));
        }

    }

    public static void main(String[] args) throws IOException {
        FirefoxProfilesOperator ff = new FirefoxProfilesOperator();
        ff.restoreProfiles();
        ff.backupProfiles();
        ff.restoreProfiles();
        ff.backupProfiles();

    }
}