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#ifndef QV4DATACOLLECTOR_H
#define QV4DATACOLLECTOR_H

#include <private/qv4engine_p.h>
#include <private/qv4debugging_p.h>

QT_BEGIN_NAMESPACE

class QV4DataCollector
{
public:
    typedef uint Ref;
    typedef QVector<uint> Refs;

    static QV4::Heap::CallContext *findContext(QV4::Heap::ExecutionContext *ctxt, int frame);
    static QV4::Heap::CallContext *findScope(QV4::Heap::ExecutionContext *ctxt, int scope);
    static QVector<QV4::Heap::ExecutionContext::ContextType> getScopeTypes(
            QV4::ExecutionEngine *engine, int frame);

    QV4DataCollector(QV4::ExecutionEngine *engine);
    ~QV4DataCollector();

    void collect(const QV4::ScopedValue &value);

    QJsonObject lookupRef(Ref ref);

    Ref addFunctionRef(const QString &functionName);
    Ref addScriptRef(const QString &scriptName);

    void collectScope(QJsonObject *dict, QV4::Debugging::Debugger *debugger, int frameNr,
                      int scopeNr);

    QV4::ExecutionEngine *engine() const { return m_engine; }

private:
    friend class RefHolder;

    Ref addRef(QV4::Value value, bool deduplicate = true);
    QV4::ReturnedValue getValue(Ref ref);
    bool lookupSpecialRef(Ref ref, QJsonObject *dict);

    QJsonArray collectProperties(QV4::Object *object);
    QJsonObject collectAsJson(const QString &name, const QV4::ScopedValue &value);
    void collectArgumentsInContext();

    QV4::ExecutionEngine *m_engine;
    Refs *m_collectedRefs;
    QV4::PersistentValue values;
    typedef QHash<Ref, QJsonObject> SpecialRefs;
    SpecialRefs specialRefs;
};

class RefHolder {
public:
    RefHolder(QV4DataCollector *collector, QV4DataCollector::Refs *target) :
        m_collector(collector), m_previousRefs(collector->m_collectedRefs)
    {
        m_collector->m_collectedRefs = target;
    }

    ~RefHolder()
    {
        std::swap(m_collector->m_collectedRefs, m_previousRefs);
    }

private:
    QV4DataCollector *m_collector;
    QV4DataCollector::Refs *m_previousRefs;
};

class ExpressionEvalJob: public QV4::Debugging::Debugger::JavaScriptJob
{
    QV4DataCollector *collector;
    QString exception;

public:
    ExpressionEvalJob(QV4::ExecutionEngine *engine, int frameNr, const QString &expression,
                      QV4DataCollector *collector);
    virtual void handleResult(QV4::ScopedValue &result);
    const QString &exceptionMessage() const;
};

class GatherSourcesJob: public QV4::Debugging::Debugger::Job
{
    QV4::ExecutionEngine *engine;
    const int seq;

public:
    GatherSourcesJob(QV4::ExecutionEngine *engine, int seq);
    void run();
};

class ArgumentCollectJob: public QV4::Debugging::Debugger::Job
{
    QV4::ExecutionEngine *engine;
    QV4DataCollector *collector;
    QStringList *names;
    int frameNr;
    int scopeNr;

public:
    ArgumentCollectJob(QV4::ExecutionEngine *engine, QV4DataCollector *collector,
                       QStringList *names, int frameNr, int scopeNr);
    void run();
};

class LocalCollectJob: public QV4::Debugging::Debugger::Job
{
    QV4::ExecutionEngine *engine;
    QV4DataCollector *collector;
    QStringList *names;
    int frameNr;
    int scopeNr;

public:
    LocalCollectJob(QV4::ExecutionEngine *engine, QV4DataCollector *collector, QStringList *names,
                    int frameNr, int scopeNr);
    void run();
};

class ThisCollectJob: public QV4::Debugging::Debugger::Job
{
    QV4::ExecutionEngine *engine;
    QV4DataCollector *collector;
    int frameNr;
    bool *foundThis;

public:
    ThisCollectJob(QV4::ExecutionEngine *engine, QV4DataCollector *collector, int frameNr,
                   bool *foundThis);
    void run();
    bool myRun();
};

class ExceptionCollectJob: public QV4::Debugging::Debugger::Job
{
    QV4::ExecutionEngine *engine;
    QV4DataCollector *collector;

public:
    ExceptionCollectJob(QV4::ExecutionEngine *engine, QV4DataCollector *collector);
    void run();
};

QT_END_NAMESPACE

#endif // QV4DATACOLLECTOR_H