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#ifndef SYMBIANUTILS_JSON_H

#define SYMBIANUTILS_JSON_H

#include "symbianutils_global.h"

#include <QtCore/QByteArray>

#include <QtCore/QStringList>

#include <QtCore/QVector>

namespace tcftrk {

class SYMBIANUTILS_EXPORT JsonValue

{

public:

    JsonValue() : m_type(Invalid) {}

    explicit JsonValue(const QByteArray &str) { fromString(str); }

    QByteArray m_name;

    QByteArray m_data;

    QList<JsonValue> m_children;

    enum Type {

        Invalid,

        String,

        Number,

        Boolean,

        Object,

        NullObject,

        Array,

    };

    Type m_type;

    inline Type type() const { return m_type; }

    inline QByteArray name() const { return m_name; }

    inline bool hasName(const char *name) const { return m_name == name; }

    inline bool isValid() const { return m_type != Invalid; }

    inline bool isNumber() const { return m_type == Number; }

    inline bool isString() const { return m_type == String; }

    inline bool isObject() const { return m_type == Object; }

    inline bool isArray() const { return m_type == Array; }

    inline QByteArray data() const { return m_data; }

    inline const QList<JsonValue> &children() const { return m_children; }

    inline int childCount() const { return m_children.size(); }

    const JsonValue &childAt(int index) const { return m_children[index]; }

    JsonValue &childAt(int index) { return m_children[index]; }

    JsonValue findChild(const char *name) const;

    QByteArray toString(bool multiline = false, int indent = 0) const;

    void fromString(const QByteArray &str);

    void setStreamOutput(const QByteArray &name, const QByteArray &content);

private:

    static QByteArray parseCString(const char *&from, const char *to);

    static QByteArray parseNumber(const char *&from, const char *to);

    static QByteArray escapeCString(const QByteArray &ba);

    static QString escapeCString(const QString &ba);

    void parsePair(const char *&from, const char *to);

    void parseValue(const char *&from, const char *to);

    void parseObject(const char *&from, const char *to);

    void parseArray(const char *&from, const char *to);

    void dumpChildren(QByteArray *str, bool multiline, int indent) const;

};

/* Thin wrapper around QByteArray for formatting JSON input. Use as in:

 * JsonInputStream(byteArray) << '{' <<  "bla" << ':' << "blup" << '}';

 * Note that strings get double quotes and JSON-escaping, characters should be

 * used for the array/hash delimiters.

 * */

class SYMBIANUTILS_EXPORT JsonInputStream {

public:

    explicit JsonInputStream(QByteArray &a) : m_target(a) {}

    JsonInputStream &operator<<(char c) {  m_target.append(c); return *this; }

    JsonInputStream &operator<<(const char *c)  { appendCString(c); return *this; }

    JsonInputStream &operator<<(const QByteArray &a)  { appendCString(a.constData()); return *this; }

    JsonInputStream &operator<<(const QString &c) { appendString(c); return *this; }

    // Format as array

    JsonInputStream &operator<<(const QStringList &c);

    // Format as array

    JsonInputStream &operator<<(const QVector<QByteArray> &ba);

    JsonInputStream &operator<<(bool b);

    JsonInputStream &operator<<(int i)

        { m_target.append(QByteArray::number(i)); return *this; }

    JsonInputStream &operator<<(unsigned i)

        { m_target.append(QByteArray::number(i)); return *this; }

    JsonInputStream &operator<<(quint64 i)

        { m_target.append(QByteArray::number(i)); return *this; }

private:

    void appendString(const QString &);

    void appendCString(const char *c);

    QByteArray &m_target;

};

} // namespace tcftrk

#endif // SYMBIANUTILS_JSON_H