/*
 * 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 2 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 "UBVersion.h"

#include <QtCore>
#include <QStringList>


#include "core/memcheck.h"

UBVersion::UBVersion()
    : mIsValid(false)
    , mPlatform(-1)
    , mMajor(-1)
    , mMinor(-1)
{
    // NOOP
}


UBVersion::UBVersion(const QString &string)
{
    setString(string);
}


UBVersion::~UBVersion()
{
    // NOOP
}


QString UBVersion::toString() const
{
    return isValid() ? mString : "INVALID";
}

void UBVersion::setString(const QString &string)
{
    mIsValid = true;
    mString = string;
    QStringList versionParts = string.split(".");
    int count = versionParts.count();

    if (count <  2)
    {
        mIsValid = false;
        return;
    }

    mPlatform = versionParts.at(0).toInt(&mIsValid);
    if (!isValid()) return;
    mMajor = versionParts.at(1).toInt(&mIsValid);
    if (!isValid()) return;

    if (count == 2)
    {
        mMinor = 0;
        mReleaseStage = ReleaseCandidate;
    }
    else if (count == 3)
    {
        // Format 4.1.2 (implicitly release)
        mMinor = versionParts.at(2).toInt(&mIsValid);
        if (!isValid()) return;
        mReleaseStage = ReleaseCandidate;
    }
    else if (count >= 4)
    {
        // Format 4.1.x.2 (where x = a|b|r|<integer>)
        if ("a" == versionParts.at(2))
        {
            mReleaseStage = Alpha;
        }
        else if ("b" == versionParts.at(2))
        {
            mReleaseStage = Beta;
        }
        else if ("r" == versionParts.at(2))
        {
            mReleaseStage = ReleaseCandidate;
        }
        else
        {
            mMinor = versionParts.at(2).toInt(&mIsValid);
            if (!isValid()) return;
            mReleaseStage = ReleaseCandidate;
            return;
        }

        QStringList lastParts = versionParts.at(3).split(" ");
        mMinor = lastParts.at(0).toInt();
    }
}

bool UBVersion::isValid() const
{
    return mIsValid;
}

int UBVersion::platformNumber() const
{
    Q_ASSERT(isValid());
    return mPlatform;
}

int UBVersion::majorNumber() const
{
    Q_ASSERT(isValid());
    return mMajor;
}

ReleaseStage UBVersion::releaseStage() const
{
    Q_ASSERT(isValid());
    return mReleaseStage;
}

int UBVersion::minorNumber() const
{
    Q_ASSERT(isValid());
    return mMinor;
}

bool UBVersion::operator < (const UBVersion &otherVersion) const
{
    Q_ASSERT(isValid());
    Q_ASSERT(otherVersion.isValid());

    if (platformNumber() != otherVersion.platformNumber())
        return platformNumber() < otherVersion.platformNumber();
    if (majorNumber() != otherVersion.majorNumber())
        return majorNumber() < otherVersion.majorNumber();
    if (releaseStage() != otherVersion.releaseStage())
        return releaseStage() < otherVersion.releaseStage();
    if (minorNumber() != otherVersion.minorNumber())
        return minorNumber() < otherVersion.minorNumber();
    return false;
}

bool UBVersion::operator == (const UBVersion &otherVersion) const
{
    Q_ASSERT(isValid());
    Q_ASSERT(otherVersion.isValid());

    return (platformNumber() == otherVersion.platformNumber() &&
            majorNumber() == otherVersion.majorNumber() &&
            releaseStage() == otherVersion.releaseStage() &&
            minorNumber() == otherVersion.minorNumber());
}

bool UBVersion::operator > (const UBVersion &otherVersion) const
{
    Q_ASSERT(isValid());
    Q_ASSERT(otherVersion.isValid());

    if (platformNumber() != otherVersion.platformNumber())
        return platformNumber() > otherVersion.platformNumber();
    if (majorNumber() != otherVersion.majorNumber())
        return majorNumber() > otherVersion.majorNumber();
    if (releaseStage() != otherVersion.releaseStage())
        return releaseStage() > otherVersion.releaseStage();
    if (minorNumber() != otherVersion.minorNumber())
        return minorNumber() > otherVersion.minorNumber();
    return false;
}
