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#include "qmlpackage_p.h"

#include <private/qobject_p.h>
#include "private/qmlguard_p.h"

QT_BEGIN_NAMESPACE

class QmlPackagePrivate : public QObjectPrivate
{
public:
    QmlPackagePrivate() {}

    struct DataGuard : public QmlGuard<QObject>
    {
        DataGuard(QObject *obj, QList<DataGuard> *l) : list(l) { (QmlGuard<QObject>&)*this = obj; }
        QList<DataGuard> *list;
        void objectDestroyed(QObject *) {
            // we assume priv will always be destroyed after objectDestroyed calls
            list->removeOne(*this);
        }
    };

    QList<DataGuard> dataList;
    static void data_append(QmlListProperty<QObject> *prop, QObject *o) {
        QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data);
        list->append(DataGuard(o, list));
    }
    static void data_clear(QmlListProperty<QObject> *prop) {
        QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data);
        list->clear();
    }
    static QObject *data_at(QmlListProperty<QObject> *prop, int index) {
        QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data);
        return list->at(index);
    }
    static int data_count(QmlListProperty<QObject> *prop) {
        QList<DataGuard> *list = static_cast<QList<DataGuard> *>(prop->data);
        return list->count();
    }
};

class QmlPackageAttached : public QObject
{
Q_OBJECT
Q_PROPERTY(QString name READ name WRITE setName)
public:
    QmlPackageAttached(QObject *parent);
    virtual ~QmlPackageAttached();

    QString name() const;
    void setName(const QString &n);

    static QHash<QObject *, QmlPackageAttached *> attached;
private:
    QString _name;
};

QHash<QObject *, QmlPackageAttached *> QmlPackageAttached::attached;

QmlPackageAttached::QmlPackageAttached(QObject *parent)
: QObject(parent)
{
    attached.insert(parent, this);
}

QmlPackageAttached::~QmlPackageAttached()
{
    attached.remove(parent());
}

QString QmlPackageAttached::name() const 
{ 
    return _name; 
}

void QmlPackageAttached::setName(const QString &n) 
{ 
    _name = n; 
}

QmlPackage::QmlPackage(QObject *parent)
    : QObject(*(new QmlPackagePrivate), parent)
{
}

QmlPackage::~QmlPackage()
{
    Q_D(QmlPackage);
    for (int ii = 0; ii < d->dataList.count(); ++ii) {
        QObject *obj = d->dataList.at(ii);
        obj->setParent(this);
    }
}

QmlListProperty<QObject> QmlPackage::data()
{
    Q_D(QmlPackage);
    return QmlListProperty<QObject>(this, &d->dataList, QmlPackagePrivate::data_append, 
                                                        QmlPackagePrivate::data_count, 
                                                        QmlPackagePrivate::data_at, 
                                                        QmlPackagePrivate::data_clear);
}

bool QmlPackage::hasPart(const QString &name)
{
    Q_D(QmlPackage);
    for (int ii = 0; ii < d->dataList.count(); ++ii) {
        QObject *obj = d->dataList.at(ii);
        QmlPackageAttached *a = QmlPackageAttached::attached.value(obj);
        if (a && a->name() == name)
            return true;
    }
    return false;
}

QObject *QmlPackage::part(const QString &name)
{
    Q_D(QmlPackage);
    if (name.isEmpty() && !d->dataList.isEmpty())
        return d->dataList.at(0);

    for (int ii = 0; ii < d->dataList.count(); ++ii) {
        QObject *obj = d->dataList.at(ii);
        QmlPackageAttached *a = QmlPackageAttached::attached.value(obj);
        if (a && a->name() == name)
            return obj;
    }

    if (name == QLatin1String("default") && !d->dataList.isEmpty())
        return d->dataList.at(0);

    return 0;
}

QmlPackageAttached *QmlPackage::qmlAttachedProperties(QObject *o)
{
    return new QmlPackageAttached(o);
}

QML_DEFINE_TYPE(Qt,4,6,Package,QmlPackage)

QT_END_NAMESPACE

#include <qmlpackage.moc>