/****************************************************************************
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** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
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** This file is part of the Qt3D module of the Qt Toolkit.
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#include <QtTest/QTest>
#include <Qt3DCore/private/qnode_p.h>
#include <Qt3DCore/private/qscene_p.h>
#include <Qt3DCore/private/qnodecreatedchangegenerator_p.h>
#include <Qt3DCore/qpropertynodeaddedchange.h>
#include <Qt3DCore/qpropertynoderemovedchange.h>

#include <Qt3DRender/qlayer.h>
#include <Qt3DRender/qlayerfilter.h>
#include <Qt3DRender/private/qlayerfilter_p.h>

#include "testpostmanarbiter.h"

class tst_QLayerFilter: public QObject
{
    Q_OBJECT
public:
    tst_QLayerFilter()
        : QObject()
    {
        qRegisterMetaType<Qt3DCore::QNode*>();
    }

private Q_SLOTS:

    void checkCloning_data()
    {
        QTest::addColumn<Qt3DRender::QLayerFilter *>("layerFilter");
        QTest::addColumn<QVector<Qt3DRender::QLayer*>>("layers");


        Qt3DRender::QLayerFilter *defaultConstructed = new Qt3DRender::QLayerFilter();
        QTest::newRow("defaultConstructed") << defaultConstructed << QVector<Qt3DRender::QLayer*>();

        Qt3DRender::QLayerFilter *singleLayer = new Qt3DRender::QLayerFilter();
        auto layer = QVector<Qt3DRender::QLayer*>() << new Qt3DRender::QLayer();
        QCoreApplication::processEvents();
        singleLayer->addLayer(layer.first());
        QTest::newRow("single layer") << singleLayer << layer;

        Qt3DRender::QLayerFilter *multiLayers = new Qt3DRender::QLayerFilter();
        auto layers = QVector<Qt3DRender::QLayer*>() << new Qt3DRender::QLayer()
                                                     << new Qt3DRender::QLayer()
                                                     << new Qt3DRender::QLayer();
        QCoreApplication::processEvents();
        for (Qt3DRender::QLayer *layer : qAsConst(layers))
            multiLayers->addLayer(layer);
        QTest::newRow("multi layers") << multiLayers << layers;
     }

    void checkCloning()
    {
        // GIVEN
        QFETCH(Qt3DRender::QLayerFilter *, layerFilter);
        QFETCH(QVector<Qt3DRender::QLayer*>, layers);

        // THEN
        QCOMPARE(layerFilter->layers(), layers);

        // WHEN
        Qt3DCore::QNodeCreatedChangeGenerator creationChangeGenerator(layerFilter);
        QVector<Qt3DCore::QNodeCreatedChangeBasePtr> creationChanges = creationChangeGenerator.creationChanges();

        // THEN
        QCOMPARE(creationChanges.size(), layers.size() + 1);

        const Qt3DCore::QNodeCreatedChangePtr<Qt3DRender::QLayerFilterData> creationChangeData =
                qSharedPointerCast<Qt3DCore::QNodeCreatedChange<Qt3DRender::QLayerFilterData>>(creationChanges.first());
        const Qt3DRender::QLayerFilterData &cloneData = creationChangeData->data;

        // THEN
        QCOMPARE(layerFilter->id(), creationChangeData->subjectId());
        QCOMPARE(layerFilter->isEnabled(), creationChangeData->isNodeEnabled());
        QCOMPARE(layerFilter->metaObject(), creationChangeData->metaObject());
        QCOMPARE(Qt3DCore::qIdsForNodes(layerFilter->layers()), cloneData.layerIds);

        delete layerFilter;
    }

    void checkPropertyUpdates()
    {
        // GIVEN
        TestArbiter arbiter;
        QScopedPointer<Qt3DRender::QLayerFilter> layerFilter(new Qt3DRender::QLayerFilter());
        arbiter.setArbiterOnNode(layerFilter.data());

        // WHEN
        auto layer = new Qt3DRender::QLayer(layerFilter.data());
        QCoreApplication::processEvents();
        layerFilter->addLayer(layer);
        QCoreApplication::processEvents();

        // THEN
        QCOMPARE(arbiter.events.size(), 1);
        auto addChange = arbiter.events.first().staticCast<Qt3DCore::QPropertyNodeAddedChange>();
        QCOMPARE(addChange->propertyName(), "layer");
        QCOMPARE(addChange->subjectId(), layerFilter->id());
        QCOMPARE(addChange->addedNodeId(), layerFilter->layers().at(0)->id());
        QCOMPARE(addChange->type(), Qt3DCore::PropertyValueAdded);

        arbiter.events.clear();

        // WHEN
        layer = new Qt3DRender::QLayer(layerFilter.data());
        QCoreApplication::processEvents();
        layerFilter->addLayer(layer);
        QCoreApplication::processEvents();

        // THEN
        QCOMPARE(arbiter.events.size(), 1);
        addChange = arbiter.events.first().staticCast<Qt3DCore::QPropertyNodeAddedChange>();
        QCOMPARE(addChange->propertyName(), "layer");
        QCOMPARE(addChange->subjectId(), layerFilter->id());
        QCOMPARE(addChange->addedNodeId(), layerFilter->layers().at(1)->id());
        QCOMPARE(addChange->type(), Qt3DCore::PropertyValueAdded);

        arbiter.events.clear();

        // WHEN
        layer = layerFilter->layers().at(0);
        layerFilter->removeLayer(layer);
        QCoreApplication::processEvents();

        // THEN
        QCOMPARE(arbiter.events.size(), 1);
        auto removeChange = arbiter.events.first().staticCast<Qt3DCore::QPropertyNodeRemovedChange>();
        QCOMPARE(removeChange->propertyName(), "layer");
        QCOMPARE(removeChange->subjectId(), layerFilter->id());
        QCOMPARE(removeChange->removedNodeId(), layer->id());
        QCOMPARE(removeChange->type(), Qt3DCore::PropertyValueRemoved);

        arbiter.events.clear();
    }

    void checkLayerBookkeeping()
    {
        // GIVEN
        QScopedPointer<Qt3DRender::QLayerFilter> layerFilter(new Qt3DRender::QLayerFilter);
        {
            // WHEN
            Qt3DRender::QLayer layer;
            layerFilter->addLayer(&layer);

            // THEN
            QCOMPARE(layer.parent(), layerFilter.data());
            QCOMPARE(layerFilter->layers().size(), 1);
        }
        // THEN (Should not crash and parameter be unset)
        QVERIFY(layerFilter->layers().empty());

        {
            // WHEN
            Qt3DRender::QLayerFilter someOtherLayerFilter;
            QScopedPointer<Qt3DRender::QLayer> layer(new Qt3DRender::QLayer(&someOtherLayerFilter));
            layerFilter->addLayer(layer.data());

            // THEN
            QCOMPARE(layer->parent(), &someOtherLayerFilter);
            QCOMPARE(layerFilter->layers().size(), 1);

            // WHEN
            layerFilter.reset();
            layer.reset();

            // THEN Should not crash when the layer is destroyed (tests for failed removal of destruction helper)
        }
    }
};

QTEST_MAIN(tst_QLayerFilter)

#include "tst_qlayerfilter.moc"