// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QV4JSONOBJECT_H
#define QV4JSONOBJECT_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "qv4object_p.h"
#include <qjsonarray.h>
#include <qjsonobject.h>
#include <qjsonvalue.h>
#include <qjsondocument.h>
#include <qhash.h>

QT_BEGIN_NAMESPACE

namespace QV4 {

namespace Heap {

struct JsonObject : Object {
    void init();
};

}

struct ObjectItem {
    const QV4::Object *o;
    ObjectItem(const QV4::Object *o) : o(o) {}
};

inline bool operator ==(const ObjectItem &a, const ObjectItem &b)
{ return a.o->d() == b.o->d(); }

inline size_t qHash(const ObjectItem &i, size_t seed = 0)
{ return ::qHash((void *)i.o->d(), seed); }

struct JsonObject : Object {
    Q_MANAGED_TYPE(JsonObject)
    V4_OBJECT2(JsonObject, Object)
private:

    typedef QSet<ObjectItem> V4ObjectSet;
public:

    static ReturnedValue method_parse(const FunctionObject *, const Value *thisObject, const Value *argv, int argc);
    static ReturnedValue method_stringify(const FunctionObject *, const Value *thisObject, const Value *argv, int argc);

    static ReturnedValue fromJsonValue(ExecutionEngine *engine, const QJsonValue &value);
    static ReturnedValue fromJsonObject(ExecutionEngine *engine, const QJsonObject &object);
    static ReturnedValue fromJsonArray(ExecutionEngine *engine, const QJsonArray &array);

    static inline QJsonValue toJsonValue(const QV4::Value &value)
    { V4ObjectSet visitedObjects; return toJsonValue(value, visitedObjects); }
    static inline QJsonObject toJsonObject(const QV4::Object *o)
    { V4ObjectSet visitedObjects; return toJsonObject(o, visitedObjects); }
    static inline QJsonArray toJsonArray(const QV4::Object *o)
    { V4ObjectSet visitedObjects; return toJsonArray(o, visitedObjects); }

private:
    static QJsonValue toJsonValue(const QV4::Value &value, V4ObjectSet &visitedObjects);
    static QJsonObject toJsonObject(const Object *o, V4ObjectSet &visitedObjects);
    static QJsonArray toJsonArray(const Object *o, V4ObjectSet &visitedObjects);
};

class JsonParser
{
public:
    JsonParser(ExecutionEngine *engine, const QChar *json, int length);

    ReturnedValue parse(QJsonParseError *error);

private:
    inline bool eatSpace();
    inline QChar nextToken();

    ReturnedValue parseObject();
    ReturnedValue parseArray();
    bool parseMember(Object *o);
    bool parseString(QString *string);
    bool parseValue(Value *val);
    bool parseNumber(Value *val);

    ExecutionEngine *engine;
    const QChar *head;
    const QChar *json;
    const QChar *end;

    int nestingLevel;
    QJsonParseError::ParseError lastError;
};

}

QT_END_NAMESPACE

#endif