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#include "qvaluespacemanager_p.h"

QTM_BEGIN_NAMESPACE

Q_GLOBAL_STATIC(QValueSpaceManager, valueSpaceManager);

QValueSpaceManager *QValueSpaceManager::instance()
{
    return valueSpaceManager();
}

QValueSpaceManager::QValueSpaceManager()
    : type(Uninit)
{
}

void QValueSpaceManager::init(QAbstractValueSpaceLayer::Type type)
{
    // Both server and clients may call this function multiple times
    if (Uninit != this->type)
        return;

    // Install all the dormant layers
    for (int ii = 0; ii < funcs.count(); ++ii)
        install(funcs[ii]());
    funcs.clear();

    this->type = (type == QAbstractValueSpaceLayer::Server) ? Server : Client;

    for (int ii = 0; ii < layers.count(); ++ii) {
        if (!layers.at(ii)->startup(type)) {
            layers.removeAt(ii);
            --ii;
        }
    }
}

bool QValueSpaceManager::isServer() const
{
    return (Server == type);
}

void QValueSpaceManager::install(QAbstractValueSpaceLayer * layer)
{
    Q_ASSERT(Uninit == type);
    Q_ASSERT(layer);

    layers.append(layer);
}

void QValueSpaceManager::install(QValueSpace::LayerCreateFunc func)
{
    Q_ASSERT(Uninit == type);
    funcs.append(func);
}

QList<QAbstractValueSpaceLayer *> const & QValueSpaceManager::getLayers()
{
    init(QAbstractValueSpaceLayer::Client); // Fallback init

    return layers;
}

QTM_END_NAMESPACE