/**
 * @file PswGen/Generator/module.cpp
 * @brief Implementation of the iGenerator interface
 * @author Enar Vaikene
 *
 * Copyright (c) 2011-2019 Enar Vaikene
 *
 * This file is part of the eVaf C++ cross-platform application development framework.
 *
 * This file can be used under the terms of the GNU General Public License
 * version 3.0 as published by the Free Software Foundation and appearing in
 * the file LICENSE included in the packaging of this file. Please review the
 * the following information to ensure the GNU General Public License version
 * 3.0 requirements will be met: http://www.gnu.org/copyleft/gpl.html.
 *
 * Alternatively, this file may be used in accordance with the Commercial License
 * Agreement provided with the Software.
 */

#include "module.h"

#include <Common/iLogger>
#include <Common/iRegistry>

#include <QtCore>

VER_EXPORT_VERSION_INFO()

using namespace eVaf;
using namespace eVaf::PswGen;
using namespace eVaf::PswGen::Generator;

//-------------------------------------------------------------------

Module::Module()
    : Plugins::iPlugin()
{
    setObjectName(QString("%1.%2").arg(VER_MODULE_NAME_STR).arg(__FUNCTION__));

    mGenerator = new Internal::GeneratorImpl;

    EVAF_INFO("%s created", qPrintable(objectName()));
}

Module::~Module()
{
    delete mGenerator;

    EVAF_INFO("%s destroyed", qPrintable(objectName()));
}

bool Module::init(QString const & args)
{
    Q_UNUSED(args)

    EVAF_INFO("%s initialized", qPrintable(objectName()));

    return true;
}

void Module::done()
{
    EVAF_INFO("%s finalized", qPrintable(objectName()));
}


//-------------------------------------------------------------------

using namespace eVaf::PswGen::Generator::Internal;

GeneratorImpl::GeneratorImpl()
    : QObject()
{
    setObjectName(QString("%1.iGenerator").arg(VER_MODULE_NAME_STR));

    Common::iRegistry::instance()->registerInterface("iGenerator", this);

    EVAF_INFO("%s created", qPrintable(objectName()));
}

GeneratorImpl::~GeneratorImpl()
{
    EVAF_INFO("%s destroyed", qPrintable(objectName()));
}

QString GeneratorImpl::generatePassword(QString const & name, QString const & masterPassword, int length, uint flags) const
{
    Q_UNUSED(flags)

    QByteArray inputString = QString("%1%2").arg(name).arg(masterPassword).toLatin1();
    QCryptographicHash hash(QCryptographicHash::Md5);
    hash.addData(inputString);
    QByteArray result = hash.result().toBase64();
    if (length > 0)
        result.resize(length);

    if (flags & uint(ALPHANUMERIC)) {
        // Convert all characters to alpha-numeric
        for (int i = 0; i < result.size(); ++i) {
            char c = result.at(i);
            while (isalnum(c) == 0)
                c++;
            result[i] = c;
        }
    }

    return result;
}