/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
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** This file is part of the QtQml module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL21$
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** Alternatively, this file may be used under the terms of the GNU Lesser
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****************************************************************************/

#include "qqmlproxymetaobject_p.h"
#include "qqmlproperty_p.h"

QT_BEGIN_NAMESPACE

QQmlProxyMetaObject::QQmlProxyMetaObject(QObject *obj, QList<ProxyData> *mList)
: metaObjects(mList), proxies(0), parent(0), object(obj)
{
    *static_cast<QMetaObject *>(this) = *metaObjects->first().metaObject;

    QObjectPrivate *op = QObjectPrivate::get(obj);
    if (op->metaObject)
        parent = static_cast<QAbstractDynamicMetaObject*>(op->metaObject);

    op->metaObject = this;
}

QQmlProxyMetaObject::~QQmlProxyMetaObject()
{
    if (parent)
        delete parent;
    parent = 0;

    if (proxies)
        delete [] proxies;
    proxies = 0;
}

int QQmlProxyMetaObject::metaCall(QMetaObject::Call c, int id, void **a)
{
    if ((c == QMetaObject::ReadProperty ||
        c == QMetaObject::WriteProperty) &&
            id >= metaObjects->last().propertyOffset) {

        for (int ii = 0; ii < metaObjects->count(); ++ii) {
            const ProxyData &data = metaObjects->at(ii);
            if (id >= data.propertyOffset) {
                if (!proxies) {
                    proxies = new QObject*[metaObjects->count()];
                    ::memset(proxies, 0,
                             sizeof(QObject *) * metaObjects->count());
                }

                if (!proxies[ii]) {
                    QObject *proxy = data.createFunc(object);
                    const QMetaObject *metaObject = proxy->metaObject();
                    proxies[ii] = proxy;

                    int localOffset = data.metaObject->methodOffset();
                    int methodOffset = metaObject->methodOffset();
                    int methods = metaObject->methodCount() - methodOffset;

                    // ### - Can this be done more optimally?
                    for (int jj = 0; jj < methods; ++jj) {
                        QMetaMethod method =
                            metaObject->method(jj + methodOffset);
                        if (method.methodType() == QMetaMethod::Signal)
                            QQmlPropertyPrivate::connect(proxy, methodOffset + jj, object, localOffset + jj);
                    }
                }

                int proxyOffset = proxies[ii]->metaObject()->propertyOffset();
                int proxyId = id - data.propertyOffset + proxyOffset;

                return proxies[ii]->qt_metacall(c, proxyId, a);
            }
        }
    } else if (c == QMetaObject::InvokeMetaMethod &&
               id >= metaObjects->last().methodOffset) {
        QMetaMethod m = object->metaObject()->method(id);
        if (m.methodType() == QMetaMethod::Signal) {
            QMetaObject::activate(object, id, a);
            return -1;
        }
    }

    if (parent)
        return parent->metaCall(c, id, a);
    else
        return object->qt_metacall(c, id, a);
}

QT_END_NAMESPACE