/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
**
** GNU Lesser General Public License Usage
**
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
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**************************************************************************/

#include "qmlprofilertraceclient.h"

namespace QmlJsDebugClient {

class QmlProfilerTraceClientPrivate {
public:
    QmlProfilerTraceClientPrivate(QmlProfilerTraceClient *_q)
        : q(_q)
        ,  inProgressRanges(0)
        , maximumTime(0)
        , recording(false)
    {
        ::memset(rangeCount, 0, MaximumQmlEventType * sizeof(int));
    }

    void sendRecordingStatus();

    QmlProfilerTraceClient *q;
    qint64 inProgressRanges;
    QStack<qint64> rangeStartTimes[MaximumQmlEventType];
    QStack<QStringList> rangeDatas[MaximumQmlEventType];
    QStack<Location> rangeLocations[MaximumQmlEventType];
    int rangeCount[MaximumQmlEventType];
    qint64 maximumTime;
    bool recording;
};

} // namespace QmlJsDebugClient

using namespace QmlJsDebugClient;

static const int GAP_TIME = 150;

void QmlProfilerTraceClientPrivate::sendRecordingStatus()
{
    QByteArray ba;
    QDataStream stream(&ba, QIODevice::WriteOnly);
    stream << recording;
    q->sendMessage(ba);
}

QmlProfilerTraceClient::QmlProfilerTraceClient(QDeclarativeDebugConnection *client)
    : QDeclarativeDebugClient(QLatin1String("CanvasFrameRate"), client)
    , d(new QmlProfilerTraceClientPrivate(this))
{
}

QmlProfilerTraceClient::~QmlProfilerTraceClient()
{
    delete d;
}

void QmlProfilerTraceClient::clearData()
{
    ::memset(d->rangeCount, 0, MaximumQmlEventType * sizeof(int));
    emit cleared();
}

bool QmlProfilerTraceClient::isEnabled() const
{
    return status() == Enabled;
}

bool QmlProfilerTraceClient::isRecording() const
{
    return d->recording;
}

void QmlProfilerTraceClient::setRecording(bool v)
{
    if (v == d->recording)
        return;

    d->recording = v;

    if (status() == Enabled) {
        d->sendRecordingStatus();
    }

    emit recordingChanged(v);
}

void QmlProfilerTraceClient::statusChanged(Status status)
{
    if (status == Enabled) {
        d->sendRecordingStatus();
    }
    emit enabledChanged();
}

void QmlProfilerTraceClient::messageReceived(const QByteArray &data)
{
    QByteArray rwData = data;
    QDataStream stream(&rwData, QIODevice::ReadOnly);

    qint64 time;
    int messageType;

    stream >> time >> messageType;

//    qDebug() << __FUNCTION__ << messageType;

    if (messageType >= MaximumMessage)
        return;

    if (time > (d->maximumTime + GAP_TIME) && 0 == d->inProgressRanges)
        emit gap(time);

    if (messageType == Event) {
        int event;
        stream >> event;

        if (event == EndTrace) {
            emit this->traceFinished(time);
            d->maximumTime = time;
        } else if (event == StartTrace) {
            emit this->traceStarted(time);
            d->maximumTime = time;
        } else if (event < MaximumEventType) {
            emit this->event((EventType)event, time);
            d->maximumTime = qMax(time, d->maximumTime);
        }
    } else if (messageType == Complete) {
        emit complete();
    } else {
        int range;
        stream >> range;

        if (range >= MaximumQmlEventType)
            return;

        if (messageType == RangeStart) {
            d->rangeStartTimes[range].push(time);
            d->inProgressRanges |= (static_cast<qint64>(1) << range);
            ++d->rangeCount[range];
        } else if (messageType == RangeData) {
            QString data;
            stream >> data;

            int count = d->rangeCount[range];
            if (count > 0) {
                while (d->rangeDatas[range].count() < count)
                    d->rangeDatas[range].push(QStringList());
                d->rangeDatas[range][count-1] << data;
            }

        } else if (messageType == RangeLocation) {
            QString fileName;
            int line;
            stream >> fileName >> line;

            if (d->rangeCount[range] > 0) {
                d->rangeLocations[range].push(Location(fileName, line));
            }
        } else {
            if (d->rangeCount[range] > 0) {
                --d->rangeCount[range];
                if (d->inProgressRanges & (static_cast<qint64>(1) << range))
                    d->inProgressRanges &= ~(static_cast<qint64>(1) << range);

                d->maximumTime = qMax(time, d->maximumTime);
                QStringList data = d->rangeDatas[range].count() ? d->rangeDatas[range].pop() : QStringList();
                Location location = d->rangeLocations[range].count() ? d->rangeLocations[range].pop() : Location();

                qint64 startTime = d->rangeStartTimes[range].pop();
                emit this->range((QmlEventType)range, startTime, time - startTime, data, location.fileName, location.line);
                if (d->rangeCount[range] == 0) {
                    int count = d->rangeDatas[range].count() +
                                d->rangeStartTimes[range].count() +
                                d->rangeLocations[range].count();
                    if (count != 0)
                        qWarning() << "incorrectly nested data";
                }
            }
        }
    }
}