#pragma once

// qt
#include <QCoreApplication>
#include <QJsonArray>
#include <QJsonObject>
#include <QObject>
#include <QQmlListProperty>
#include <QSettings>
#include <QSharedPointer>

#ifndef STRINGIFY
#define STRINGIFY(var) (#var)
#endif

class GlobalSettings;
class GlobalSettings : public QSettings
{
    Q_OBJECT

public:
    static QSharedPointer<GlobalSettings> instance();

private:
    GlobalSettings(
        GlobalSettings::Format format,
        GlobalSettings::Scope scope,
        const QString& organization,
        const QString& application = QString()
    );
    static QSharedPointer<GlobalSettings> m_instance;
};

#define QML_DECLARATION(type, name)                                            \
protected:                                                                     \
    Q_PROPERTY(                                                                \
        type name READ get_##name WRITE set_##name NOTIFY name##Changed FINAL  \
    )

#define G_PROPERTY_DECL(type, name)                                           \
QML_DECLARATION(type, name) protected : type m_##name;

#define G_PROPERTY_DECL_DEFAULT(type, name, default)                          \
QML_DECLARATION(type, name) protected : type m_##name = default;

#define G_PROPERTY_SIGNAL(type, name)                                         \
Q_SIGNALS:                                                                     \
    void name##Changed();                                                      \
    void name##Changed(type value)

#define G_PROPERTY_GET(type, name)                                            \
public:                                                                        \
    Q_INVOKABLE virtual type& get_##name()                                     \
    {                                                                          \
        return m_##name;                                                       \
    }                                                                          \
    Q_INVOKABLE virtual type get_##name() const                                \
    {                                                                          \
        return m_##name;                                                       \
    }

#define G_PROPERTY_GET_DEBUG(type, name)                                      \
public:                                                                        \
    virtual type get_##name() const                                            \
    {                                                                          \
        qDebug() << "PROPERTY: GET" << #name << m_##name;                      \
        return m_##name;                                                       \
    }

#define G_PROPERTY_SET(type, name)                                            \
public Q_SLOTS:                                                                \
    virtual void set_##name(type a)                                            \
    {                                                                          \
        if (m_##name == a)                                                     \
            return;                                                            \
        m_##name = a;                                                          \
        emit name##Changed();                                                  \
        emit name##Changed(m_##name);                                          \
    }

#define G_PROPERTY_SET_DEBUG(type, name)                                      \
public Q_SLOTS:                                                                \
    virtual void set_##name(type a)                                            \
    {                                                                          \
        DEBUG_INFO("PROPERTY: SET" << #name << a);                             \
        m_##name = a;                                                          \
        emit name##Changed();                                                  \
        emit name##Changed(m_##name);                                          \
    }

#define G_PROPERTY(type, name)                                                \
    G_PROPERTY_DECL(type, name)                                               \
    G_PROPERTY_SET(type, name)                                                \
    G_PROPERTY_GET(type, name)                                                \
    G_PROPERTY_SIGNAL(type, name)

#define G_PROPERTY_DEFAULT(type, name, default)                               \
    G_PROPERTY_DECL_DEFAULT(type, name, default)                              \
    G_PROPERTY_SET(type, name)                                                \
    G_PROPERTY_GET(type, name)                                                \
    G_PROPERTY_SIGNAL(type, name)

#define G_PROPERTY_CUSTOM_SET(type, name)                                     \
    G_PROPERTY_DECL(type, name)                                               \
    G_PROPERTY_GET(type, name)                                                \
    G_PROPERTY_SIGNAL(type, name)                                             \
public Q_SLOTS:                                                                \
    virtual void set_##name(type a);

#define G_PROPERTY_DEBUG(type, name)                                          \
    G_PROPERTY_DECL(type, name)                                               \
    G_PROPERTY_SET_DEBUG(type, name)                                          \
    G_PROPERTY_GET_DEBUG(type, name)                                          \
    G_PROPERTY_SIGNAL(type, name)

#define PROPERTY(type, name)                                                   \
    G_PROPERTY_SET(type, name)                                                \
    G_PROPERTY_GET(type, name)                                                \
    G_PROPERTY_SIGNAL(type, name)

#define G_PROPERTY_BASE(type, name)                                           \
    G_PROPERTY_DECL(type, name)                                               \
    G_PROPERTY_SIGNAL(type, name)

#define G_PROPERTY_WRAP(type, name)                                           \
    QML_DECLARATION(type, name)                                                \
public Q_SLOTS:                                                                \
    virtual void set_##name(type a)                                            \
    {                                                                          \
        *(type*)&name = a;                                                     \
        emit name##Changed();                                                  \
        emit name##Changed(name);                                              \
    }                                                                          \
                                                                               \
public:                                                                        \
    virtual type get_##name() const                                            \
    {                                                                          \
        return name;                                                           \
    }                                                                          \
    G_PROPERTY_SIGNAL(type, name)

#define INI_PROPERTY_SET(type, name)                                           \
public Q_SLOTS:                                                                \
    virtual void set_##name(const type& a)                                     \
    {                                                                          \
        auto old = get_##name();                                               \
        if (old == a)                                                          \
        {                                                                      \
            return;                                                            \
        }                                                                      \
        auto n = QString(this->staticMetaObject.className()) + "/" + #name;    \
        GlobalSettings::instance()->setValue(n, QVariant::fromValue(a));       \
        GlobalSettings::instance()->sync();                                    \
        emit name##Changed();                                                  \
        emit name##Changed(a);                                                 \
    }

#define INI_PROPERTY_GET(type, name, defaultValue)                             \
public:                                                                        \
    virtual type get_##name() const                                            \
    {                                                                          \
        qDebug() << "read" << #name;                                           \
        const auto result = static_cast<type>(                                 \
            GlobalSettings::instance()                                         \
                ->value(                                                       \
                    QString(this->staticMetaObject.className()) + "/" + #name, \
                    defaultValue                                               \
                )                                                              \
                .value<type>()                                                 \
        );                                                                     \
        qDebug() << #name << "result:" << result;                              \
        return result;                                                         \
    }

#define INI_PROPERTY_GET_CAST(type, name, defaultValue)                        \
public:                                                                        \
    virtual type get_##name() const                                            \
    {                                                                          \
        return GlobalSettings::instance()->value(                              \
            QString(this->staticMetaObject.className()) + "/" + #name,         \
            defaultValue                                                       \
        );                                                                     \
    }

#define INI_PROPERTY_GET_VAR(type, name, defaultValue)                         \
public:                                                                        \
    virtual type get_##name()                                                  \
    {                                                                          \
        return GlobalSettings::instance()                                      \
            ->value(                                                           \
                QString(this->staticMetaObject.className()) + "/" + #name,     \
                QVariant::fromValue(defaultValue)                              \
            )                                                                  \
            .value<type>();                                                    \
    }

#define INI_PROPERTY(type, name, defaultValue)                                 \
    INI_PROPERTY_SET(type, name)                                               \
    INI_PROPERTY_GET(type, name, defaultValue)                                 \
    QML_DECLARATION(type, name)                                                \
    G_PROPERTY_SIGNAL(type, name)

#define INI_PROPERTY_CAST(type, name, defaultValue)                            \
    INI_PROPERTY_SET(type, name)                                               \
    INI_PROPERTY_GET_CAST(type, name, defaultValue)                            \
    QML_DECLARATION(type, name)                                                \
    G_PROPERTY_SIGNAL(type, name)

#define INI_PROPERTY_VAR(type, name, defaultValue)                             \
    INI_PROPERTY_SET(type, name)                                               \
    INI_PROPERTY_GET_VAR(type, name, defaultValue)                             \
    QML_DECLARATION(type, name)                                                \
    G_PROPERTY_SIGNAL(type, name)

#define INI_PROPERTY_DEBUG(name)                                               \
    INI_PROPERTY_SET(name)                                                     \
    INI_PROPERTY_GET(name)                                                     \
    QML_DECLARATION(type, name)                                                \
    G_PROPERTY_SIGNAL(type, name)

#define RO_PROPERTY(type, name, value)                                         \
protected:                                                                     \
    Q_PROPERTY(type name READ get_##name NOTIFY name##Changed)                 \
public:                                                                        \
    inline bool get_##name()                                                   \
    {                                                                          \
        return m_##value;                                                      \
    }                                                                          \
Q_SIGNALS:                                                                     \
    void name##Changed();                                                      \
                                                                               \
protected:                                                                     \
    type m_##name;

#define STATIC_PROPERTY(type, name)                                            \
public:                                                                        \
    static inline type get_##name()                                            \
    {                                                                          \
        return m_##name;                                                       \
    }                                                                          \
    static inline void set_##name(type value)                                  \
    {                                                                          \
        m_##name = value;                                                      \
    }                                                                          \
                                                                               \
private:                                                                       \
    static type m_##name

// there must be QJsonObject json in scope;
// TODO: use QVariant::value()
#define READ_FROM_JSON(type, name, default)                                    \
    set_##name(                                                                \
        json[#name] == QJsonValue::Undefined                                   \
            ? default                                                          \
            : json[#name].toVariant().value<type>()                            \
    )

#define INIT_FROM_JSON(type, var, default)                                     \
    m_##var(                                                                   \
        (json.contains(#var))                                                  \
            ? (json[STRINGIFY(var)].toVariant().value<type>())                 \
            : (default)                                                        \
    )

#define INIT_OBJECT_JSON(var, default)                                         \
    m_##var((json.contains(#var)) ? (json[STRINGIFY(var)]) : (default))

// for QJsonObject(std::initializer_list<QPair<QString, QJsonValue> > args)
// TODO: make type first argument
#define WRITE_TO_JSON(var, cast) (#var), cast(m_##var)

#define WRITE_ENUM_TO_JSON(var) (#var), QVariant(m_##var).toJsonValue()

#define WRITE_ENUM_KEY_TO_JSON(var)                                            \
    (#var),                                                                    \
        QString(                                                               \
            QMetaEnum::fromType<typeof(m_##var)>().valueToKey(int(m_##var))    \
        )

#define WRITE_VARIANT_TO_JSON(var) (#var), QJsonValue::fromVariant(m_##var)

#define WRITE_ARRAY_TO_JSON(var) (#var), QJsonArray(m_##var)

#define WRITE_STRINGLIST_TO_JSON(var)                                          \
    (#var), QJsonArray::fromStringList(m_##var)

#define WRITE_TO_JSON_NO_CAST(var) (#var), (m_##var)

#define WRITE_PTR_TO_JSON(var) (#var), QJsonObject(*m_##var)

// without 's' in the end of name please
#define G_QML_LIST_PROPERTY(classname, type, name)                            \
protected:                                                                     \
    Q_PROPERTY(                                                                \
        QQmlListProperty<type> name##s READ name##s NOTIFY name##sChanged      \
    )                                                                          \
public:                                                                        \
    QQmlListProperty<type> name##s()                                           \
    {                                                                          \
        return QQmlListProperty<type>(                                         \
            this,                                                              \
            this,                                                              \
            &classname ::append_##name,                                        \
            &classname ::name##sCount,                                         \
            &classname ::name,                                                 \
            &classname ::clear_##name##s                                       \
        );                                                                     \
    }                                                                          \
    void append_##name(type* item)                                             \
    {                                                                          \
        m_##name##s.append(item);                                              \
        emit name##sChanged();                                                 \
        emit name##sChanged(m_##name##s);                                      \
    }                                                                          \
    int name##sCount() const                                                   \
    {                                                                          \
        return m_##name##s.count();                                            \
    }                                                                          \
    type* name(int index) const                                                \
    {                                                                          \
        return m_##name##s.at(index);                                          \
    }                                                                          \
    void clear_##name##s()                                                     \
    {                                                                          \
        while (!m_##name##s.isEmpty())                                         \
        {                                                                      \
            auto tmp = m_##name##s.takeLast();                                 \
            if (tmp->parent() == this)                                         \
                delete tmp;                                                    \
        }                                                                      \
        emit name##sChanged();                                                 \
        emit name##sChanged(m_##name##s);                                      \
    }                                                                          \
    inline QList<type*>& get_##name##s()                                       \
    {                                                                          \
        return m_##name##s;                                                    \
    }                                                                          \
Q_SIGNALS:                                                                     \
    void name##sChanged();                                                     \
                                                                               \
protected:                                                                     \
    static void append_##name(QQmlListProperty<type>* list, type* item)        \
    {                                                                          \
        reinterpret_cast<classname*>(list->data)->append_##name(item);         \
    }                                                                          \
    static int name##sCount(QQmlListProperty<type>* list)                      \
    {                                                                          \
        return reinterpret_cast<classname*>(list->data)->name##sCount();       \
    }                                                                          \
    static type* name(QQmlListProperty<type>* list, int index)                 \
    {                                                                          \
        return reinterpret_cast<classname*>(list->data)->name(index);          \
    }                                                                          \
    static void clear_##name##s(QQmlListProperty<type>* list)                  \
    {                                                                          \
        reinterpret_cast<classname*>(list->data)->clear_##name##s();           \
    }                                                                          \
    QList<type*> m_##name##s

#define INIT_FIELD(name) m_##name(name)

#define INIT_FROM_OTHER(name) m_##name(other.m_##name)

#define SET_FROM_OTHER(name) set_##name(other.m_##name)

#define SET_FROM_OTHER_PTR(name)                                               \
    *m_##name = *other.m_##name;                                               \
    emit name##Changed();                                                      \
    emit name##Changed(m_##name)

#define SET_FROM_JSON(type, name, default)                                     \
    set_##name(                                                                \
        json.contains(#name) ? json[#name].toVariant().value<type>() : default \
    )

#define SET_FROM_JSON_ENUM_KEY(name, default)                                  \
    set_##name(                                                                \
        json.contains(#name)                                                   \
            ? (typeof(m_##name))(QMetaEnum::fromType<typeof(m_##name)>()       \
                                     .keyToValue(                              \
                                         json[#name]                           \
                                             .toString()                       \
                                             .toStdString()                    \
                                             .c_str()                          \
                                     ))                                        \
            : default                                                          \
    )

#define COMPARE_WITH_OTHER(name) (get_##name() == other.get_##name())

template <class T> static QJsonArray listToJson(const QList<T*>& list)
{
    QJsonArray result;

    for (const auto& item : list)
    {
        result << QJsonValue(*item);
    }

    return result;
}

template <class T>
static QList<T*> listFromJson(
    const QJsonArray& array,
    QObject* parent = nullptr
)
{
    QList<T*> result;

    for (const auto& jsonItem : array)
    {
        result << new T(jsonItem.toObject(), parent);
    }

    return result;
}

#define INIT_LIST_FROM_JSON(listName, className, parent)                       \
    m_##listName(listFromJson<className>(json[#listName].toArray(), parent))

#define WRITE_LIST_TO_JSON(listName, className)                                \
    #listName, listToJson<className>(m_##listName)