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** This file is part of the QtQml module of the Qt Toolkit.
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****************************************************************************/

#include "qv4profileradapter_p.h"
#include "qqmlprofilerservice_p.h"
#include "qqmldebugservice_p.h"

QT_BEGIN_NAMESPACE

QV4ProfilerAdapter::QV4ProfilerAdapter(QQmlProfilerService *service, QV4::ExecutionEngine *engine) :
    QQmlAbstractProfilerAdapter(service)
{
    engine->enableProfiler();
    connect(this, SIGNAL(profilingEnabled(quint64)),
            engine->profiler, SLOT(startProfiling(quint64)));
    connect(this, SIGNAL(profilingEnabledWhileWaiting(quint64)),
            engine->profiler, SLOT(startProfiling(quint64)), Qt::DirectConnection);
    connect(this, SIGNAL(profilingDisabled()), engine->profiler, SLOT(stopProfiling()));
    connect(this, SIGNAL(profilingDisabledWhileWaiting()), engine->profiler, SLOT(stopProfiling()),
            Qt::DirectConnection);
    connect(this, SIGNAL(dataRequested()), engine->profiler, SLOT(reportData()));
    connect(this, SIGNAL(referenceTimeKnown(QElapsedTimer)),
            engine->profiler, SLOT(setTimer(QElapsedTimer)));
    connect(engine->profiler, SIGNAL(dataReady(QList<QV4::Profiling::FunctionCallProperties>,
                                               QList<QV4::Profiling::MemoryAllocationProperties>)),
            this, SLOT(receiveData(QList<QV4::Profiling::FunctionCallProperties>,
                                   QList<QV4::Profiling::MemoryAllocationProperties>)));
}

qint64 QV4ProfilerAdapter::appendMemoryEvents(qint64 until, QList<QByteArray> &messages)
{
    QByteArray message;
    while (!memory_data.empty() && memory_data.front().timestamp <= until) {
        QQmlDebugStream d(&message, QIODevice::WriteOnly);
        QV4::Profiling::MemoryAllocationProperties &props = memory_data.front();
        d << props.timestamp << MemoryAllocation << props.type << props.size;
        memory_data.pop_front();
        messages.append(message);
    }
    return memory_data.empty() ? -1 : memory_data.front().timestamp;
}

qint64 QV4ProfilerAdapter::sendMessages(qint64 until, QList<QByteArray> &messages)
{
    QByteArray message;
    while (true) {
        while (!stack.empty() && (data.empty() || stack.top() <= data.front().start)) {
            if (stack.top() > until) {
                qint64 memory_next = appendMemoryEvents(until, messages);
                return memory_next == -1 ? stack.top() : qMin(stack.top(), memory_next);
            }
            appendMemoryEvents(stack.top(), messages);
            QQmlDebugStream d(&message, QIODevice::WriteOnly);
            d << stack.pop() << RangeEnd << Javascript;
            messages.append(message);
        }
        while (!data.empty() && (stack.empty() || data.front().start < stack.top())) {
            const QV4::Profiling::FunctionCallProperties &props = data.front();
            if (props.start > until) {
                qint64 memory_next = appendMemoryEvents(until, messages);
                return memory_next == -1 ? props.start : qMin(props.start, memory_next);
            }
            appendMemoryEvents(props.start, messages);

            QQmlDebugStream d_start(&message, QIODevice::WriteOnly);
            d_start << props.start << RangeStart << Javascript;
            messages.push_back(message);
            message.clear();
            QQmlDebugStream d_location(&message, QIODevice::WriteOnly);
            d_location << props.start << RangeLocation << Javascript << props.file << props.line
                       << props.column;
            messages.push_back(message);
            message.clear();
            QQmlDebugStream d_data(&message, QIODevice::WriteOnly);
            d_data << props.start << RangeData << Javascript << props.name;
            messages.push_back(message);
            message.clear();
            stack.push(props.end);
            data.pop_front();
        }
        if (stack.empty() && data.empty())
            return appendMemoryEvents(until, messages);
    }
}

void QV4ProfilerAdapter::receiveData(const QList<QV4::Profiling::FunctionCallProperties> &new_data,
        const QList<QV4::Profiling::MemoryAllocationProperties> &new_memory_data)
{
    data = new_data;
    memory_data = new_memory_data;
    stack.clear();
    service->dataReady(this);
}

QT_END_NAMESPACE