/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qbs.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "version.h"

#include <QtCore/qregexp.h>
#include <QtCore/qstring.h>

namespace qbs {

Version::Version(int major, int minor, int patch, int buildNr)
    : m_major(major), m_minor(minor), m_patch(patch), m_build(buildNr)
{
}

int Version::majorVersion() const
{
    return m_major;
}

void Version::setMajorVersion(int major)
{
    m_major = major;
}

int Version::minorVersion() const
{
    return m_minor;
}

void Version::setMinorVersion(int minor)
{
    m_minor = minor;
}
int Version::patchLevel() const
{
    return m_patch;
}

void Version::setPatchLevel(int patch)
{
    m_patch = patch;
}

int Version::buildNumber() const
{
    return m_build;
}

void Version::setBuildNumber(int nr)
{
    m_build = nr;
}

Version Version::fromString(const QString &versionString, bool buildNumberAllowed)
{
    QString pattern = QStringLiteral("(\\d+)"); // At least one number.
    for (int i = 0; i < 2; ++i)
        pattern += QStringLiteral("(?:\\.(\\d+))?"); // Followed by a dot and a number up to two times.
    if (buildNumberAllowed)
        pattern += QStringLiteral("(?:[-.](\\d+))?"); // And possibly a dash or dot followed by the build number.
    QRegExp rex(pattern);
    if (!rex.exactMatch(versionString))
        return Version{};
    const int majorNr = rex.cap(1).toInt();
    const int minorNr = rex.captureCount() >= 2 ? rex.cap(2).toInt() : 0;
    const int patchNr = rex.captureCount() >= 3 ? rex.cap(3).toInt() : 0;
    const int buildNr = rex.captureCount() >= 4 ? rex.cap(4).toInt() : 0;
    return Version{majorNr, minorNr, patchNr, buildNr};
}

QString Version::toString() const
{
    if (m_build) {
        return QString(QStringLiteral("%1.%2.%3-%4"))
                .arg(m_major).arg(m_minor).arg(m_patch).arg(m_build);
    }
    return QString(QStringLiteral("%1.%2.%3")).arg(m_major).arg(m_minor).arg(m_patch);
}

int compare(const Version &lhs, const Version &rhs)
{
    if (lhs.majorVersion() < rhs.majorVersion())
        return -1;
    if (lhs.majorVersion() > rhs.majorVersion())
        return 1;
    if (lhs.minorVersion() < rhs.minorVersion())
        return -1;
    if (lhs.minorVersion() > rhs.minorVersion())
        return 1;
    if (lhs.patchLevel() < rhs.patchLevel())
        return -1;
    if (lhs.patchLevel() > rhs.patchLevel())
        return 1;
    if (lhs.buildNumber() < rhs.buildNumber())
        return -1;
    if (lhs.buildNumber() > rhs.buildNumber())
        return 1;
    return 0;
}

VersionRange::VersionRange(const Version &minVersion, const Version &maxVersion)
    : minimum(minVersion), maximum(maxVersion)
{
}

VersionRange &VersionRange::narrowDown(const VersionRange &other)
{
    if (other.minimum > minimum)
        minimum = other.minimum;
    if (other.maximum.isValid() && other.maximum < maximum)
        maximum = other.maximum;
    return *this;
}

} // namespace qbs