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#include "version.h"

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

namespace qbs {

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.
    const QRegularExpression rex(QRegularExpression::anchoredPattern(pattern));
    const QRegularExpressionMatch match = rex.match(versionString);
    if (!match.hasMatch())
        return Version{};
    const int majorNr = match.captured(1).toInt();
    const int minorNr = match.lastCapturedIndex() >= 2 ? match.captured(2).toInt() : 0;
    const int patchNr = match.lastCapturedIndex() >= 3 ? match.captured(3).toInt() : 0;
    const int buildNr = match.lastCapturedIndex() >= 4 ? match.captured(4).toInt() : 0;
    return Version{majorNr, minorNr, patchNr, buildNr};
}

QString Version::toString(const QChar &separator, const QChar &buildSeparator) const
{
    if (m_build) {
        return QStringLiteral("%1%5%2%5%3%6%4")
                .arg(QString::number(m_major), QString::number(m_minor),
                     QString::number(m_patch), QString::number(m_build),
                     separator, buildSeparator);
    }
    return QStringLiteral("%1%4%2%4%3")
            .arg(QString::number(m_major), QString::number(m_minor),
                 QString::number(m_patch), separator);
}

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