/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Build Suite.
**
** 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
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** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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****************************************************************************/
#include "commandlineparser.h"

#include <QFileInfo>

static QString profileOption() { return "--profile"; }
static QString startCommitOption() { return "--start-commit"; }

CommandLineParser::CommandLineParser()
{
}

void CommandLineParser::parse(const QStringList &commandLine)
{
    m_profile.clear();
    m_startCommit.clear();
    m_commandLine = commandLine;
    Q_ASSERT(!m_commandLine.isEmpty());
    m_command = m_commandLine.takeFirst();
    while (!m_commandLine.isEmpty()) {
        const QString arg = m_commandLine.takeFirst();
        if (arg == profileOption())
            assignOptionArgument(arg, m_profile);
        else if (arg == startCommitOption())
            assignOptionArgument(arg, m_startCommit);
        else
            throw ParseException(QString::fromLocal8Bit("Unknown parameter '%1'").arg(arg));
    }
    if (m_profile.isEmpty())
        throw ParseException("No profile given.");
    if (m_startCommit.isEmpty())
        throw ParseException("No start commit given.");
}

QString CommandLineParser::usageString() const
{
    return QString::fromLocal8Bit("%1 %2 <profile> %3 <start commit>")
            .arg(QFileInfo(m_command).fileName(), profileOption(), startCommitOption());
}

void CommandLineParser::assignOptionArgument(const QString &option, QString &argument)
{
    if (m_commandLine.isEmpty())
        throw ParseException(QString::fromLocal8Bit("Option '%1' needs an argument.").arg(option));
    argument = m_commandLine.takeFirst();
    if (argument.isEmpty()) {
        throw ParseException(QString::fromLocal8Bit("Argument for option '%1' must not be empty.")
                             .arg(option));
    }
}