/***************************************************************************
 *   Copyright (C) 2010 by Thomas Keller                                   *
 *   me@thomaskeller.biz                                                   *
 *                                                                         *
 *   This program 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 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>. *
 ***************************************************************************/

#include "MonotoneResourceFile.h"
#include "Platform.h"
#include "Settings.h"

#include <QDir>
#include <QDateTime>
#include <QCryptographicHash>

MonotoneResourceFile::MonotoneResourceFile() : QFile(0)
{
    QByteArray data;
    data.append(QDateTime::currentDateTime().toString());
    data.append(Platform::getUsername());
    QByteArray hash = QCryptographicHash::hash(data, QCryptographicHash::Md5);

    QString tempPath = QDir::tempPath();
    tempPath.append(QDir::separator()).append(hash.toHex()).append(".lua");
    setFileName(tempPath);

    open(QIODevice::ReadWrite);
    setPermissions(QFile::ReadOwner | QFile::WriteOwner);

    write(
        "-- this is an automatically created configuration file\n"
        "-- for a running monotone instance of guitone\n\n"
    );

    QMap<QString, QVariant> keyPasswords = Settings::getItemMap("KeyPasswords");
    if (keyPasswords.size() > 0)
    {
        write("if type(get_passphrase) == 'function' then\n");
        write("  old_get_passphrase = get_passphrase\n");
        write("end\n\n");
        write("function get_passphrase(key_identity)\n");
        write("  if type(old_get_passphrase) == 'function' then\n");
        write("    phrase = old_get_passphrase(key_identity)\n");
        write("    if phrase ~= nil then\n");
        write("      return phrase\n");
        write("    end\n");
        write("  end\n");

        QMapIterator<QString, QVariant> it(keyPasswords);
        while (it.hasNext())
        {
            it.next();
            write("  if key_identity.id == \"" + it.key().toUtf8() + "\" then\n");
            write("    return \"" + it.value().toString().toUtf8() + "\"\n");
            write("  end\n");
        }
        write("end\n");
    }
    close();
}

MonotoneResourceFile::~MonotoneResourceFile()
{
    remove();
}