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#include <QtTest/QTest>
#include <Qt3DCore/private/qnode_p.h>
#include <Qt3DCore/private/qscene_p.h>

#include <Qt3DRenderer/qclearbuffer.h>

#include "testpostmanarbiter.h"

// We need to call QNode::clone which is protected
// So we sublcass QNode instead of QObject
class tst_QClearBuffer: public Qt3DCore::QNode
{
    Q_OBJECT
public:
    ~tst_QClearBuffer()
    {
        QNode::cleanup();
    }

private Q_SLOTS:

    void checkCloning_data()
    {
        QTest::addColumn<Qt3DRender::QClearBuffer *>("clearBuffer");
        QTest::addColumn<Qt3DRender::QClearBuffer::BufferType>("bufferType");

        Qt3DRender::QClearBuffer *defaultConstructed = new Qt3DRender::QClearBuffer();
        QTest::newRow("defaultConstructed") << defaultConstructed << Qt3DRender::QClearBuffer::None;

        Qt3DRender::QClearBuffer *allBuffers = new Qt3DRender::QClearBuffer();
        allBuffers->setBuffers(Qt3DRender::QClearBuffer::AllBuffers);
        QTest::newRow("allBuffers") << allBuffers << Qt3DRender::QClearBuffer::AllBuffers;

        Qt3DRender::QClearBuffer *depthBuffer = new Qt3DRender::QClearBuffer();
        depthBuffer->setBuffers(Qt3DRender::QClearBuffer::DepthBuffer);
        QTest::newRow("depthBuffer") << depthBuffer << Qt3DRender::QClearBuffer::DepthBuffer;

        Qt3DRender::QClearBuffer *colorDepthBuffer = new Qt3DRender::QClearBuffer();
        colorDepthBuffer->setBuffers(Qt3DRender::QClearBuffer::ColorDepthBuffer);
        QTest::newRow("colorDepthBuffer") << colorDepthBuffer << Qt3DRender::QClearBuffer::ColorDepthBuffer;
    }

    void checkCloning()
    {
        // GIVEN
        QFETCH(Qt3DRender::QClearBuffer *, clearBuffer);
        QFETCH(Qt3DRender::QClearBuffer::BufferType, bufferType);

        // THEN
        QCOMPARE(clearBuffer->buffers(), bufferType);

        // WHEN
        Qt3DRender::QClearBuffer *clone = static_cast<Qt3DRender::QClearBuffer *>(QNode::clone(clearBuffer));

        // THEN
        QVERIFY(clone != Q_NULLPTR);
        QCOMPARE(clearBuffer->id(), clone->id());
        QCOMPARE(clearBuffer->buffers(), clone->buffers());

        delete clearBuffer;
        delete clone;
    }

    void checkPropertyUpdates()
    {
        // GIVEN
        QScopedPointer<Qt3DRender::QClearBuffer> clearBuffer(new Qt3DRender::QClearBuffer());
        TestArbiter arbiter(clearBuffer.data());

        // WHEN
        clearBuffer->setBuffers(Qt3DRender::QClearBuffer::AllBuffers);
        QCoreApplication::processEvents();

        // THEN
        QCOMPARE(arbiter.events.size(), 1);
        Qt3DCore::QScenePropertyChangePtr change = arbiter.events.first().staticCast<Qt3DCore::QScenePropertyChange>();
        QCOMPARE(change->propertyName(), "buffers");
        QCOMPARE(change->subjectId(), clearBuffer->id());
        QCOMPARE(change->value().value<Qt3DRender::QClearBuffer::BufferType>(), Qt3DRender::QClearBuffer::AllBuffers);
        QCOMPARE(change->type(), Qt3DCore::NodeUpdated);

        arbiter.events.clear();

        // WHEN
        clearBuffer->setBuffers(Qt3DRender::QClearBuffer::AllBuffers);
        QCoreApplication::processEvents();

        // THEN
        QCOMPARE(arbiter.events.size(), 0);

        // WHEN
        clearBuffer->setBuffers(Qt3DRender::QClearBuffer::ColorDepthBuffer);
        QCoreApplication::processEvents();

        // THEN
        QCOMPARE(arbiter.events.size(), 1);
        change = arbiter.events.first().staticCast<Qt3DCore::QScenePropertyChange>();
        QCOMPARE(change->propertyName(), "buffers");
        QCOMPARE(change->subjectId(), clearBuffer->id());
        QCOMPARE(change->value().value<Qt3DRender::QClearBuffer::BufferType>(), Qt3DRender::QClearBuffer::ColorDepthBuffer);
        QCOMPARE(change->type(), Qt3DCore::NodeUpdated);

        arbiter.events.clear();
    }

protected:
    Qt3DCore::QNode *doClone() const Q_DECL_OVERRIDE
    {
        return Q_NULLPTR;
    }

};

QTEST_MAIN(tst_QClearBuffer)

#include "tst_qclearbuffer.moc"