/****************************************************************************
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** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
** Contact: http://www.qt-project.org/legal
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** This file is part of the Qt3D module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL3$
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** accordance with the commercial license agreement provided with the
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** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
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** $QT_END_LICENSE$
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****************************************************************************/

#include <QtTest/QTest>
#include <Qt3DRenderer/private/geometryrenderer_p.h>
#include <Qt3DRenderer/qgeometry.h>
#include <Qt3DRenderer/qgeometryfunctor.h>
#include <Qt3DCore/qscenepropertychange.h>

class TestFunctor : public Qt3DRender::QGeometryFunctor
{
public:
    explicit TestFunctor(int size)
        : m_size(size)
    {}

    Qt3DRender::QGeometry *operator ()() Q_DECL_FINAL
    {
        return Q_NULLPTR;
    }

    bool operator ==(const Qt3DRender::QGeometryFunctor &other) const
    {
        const TestFunctor *otherFunctor = functor_cast<TestFunctor>(&other);
        if (otherFunctor != Q_NULLPTR)
            return otherFunctor->m_size == m_size;
        return false;
    }

    QT3D_FUNCTOR(TestFunctor)

private:
    int m_size;
};

class tst_RenderGeometryRenderer : public QObject
{
    Q_OBJECT
private Q_SLOTS:

    void checkPeerPropertyMirroring()
    {
        // GIVEN
        Qt3DRender::Render::GeometryRenderer renderGeometryRenderer;
        Qt3DRender::QGeometryRenderer geometryRenderer;
        Qt3DRender::QGeometry geometry;
        Qt3DRender::QGeometryFunctorPtr functor(new TestFunctor(1200));

        geometryRenderer.setInstanceCount(1584);
        geometryRenderer.setPrimitiveCount(1609);
        geometryRenderer.setBaseVertex(750);
        geometryRenderer.setBaseInstance(883);
        geometryRenderer.setRestartIndex(65536);
        geometryRenderer.setPrimitiveRestart(true);
        geometryRenderer.setPrimitiveType(Qt3DRender::QGeometryRenderer::Patches);
        geometryRenderer.setGeometry(&geometry);
        geometryRenderer.setGeometryFunctor(functor);
        geometryRenderer.setEnabled(false);

        // WHEN
        renderGeometryRenderer.setPeer(&geometryRenderer);

        // THEN
        QCOMPARE(renderGeometryRenderer.peerUuid(), geometryRenderer.id());
        QCOMPARE(renderGeometryRenderer.isDirty(), true);
        QCOMPARE(renderGeometryRenderer.instanceCount(), geometryRenderer.instanceCount());
        QCOMPARE(renderGeometryRenderer.primitiveCount(), geometryRenderer.primitiveCount());
        QCOMPARE(renderGeometryRenderer.baseVertex(), geometryRenderer.baseVertex());
        QCOMPARE(renderGeometryRenderer.baseInstance(), geometryRenderer.baseInstance());
        QCOMPARE(renderGeometryRenderer.restartIndex(), geometryRenderer.restartIndex());
        QCOMPARE(renderGeometryRenderer.primitiveRestart(), geometryRenderer.primitiveRestart());
        QCOMPARE(renderGeometryRenderer.primitiveType(), geometryRenderer.primitiveType());
        QCOMPARE(renderGeometryRenderer.geometryId(), geometry.id());
        QCOMPARE(renderGeometryRenderer.geometryFunctor(), functor);
        QCOMPARE(renderGeometryRenderer.isEnabled(), false);
        QVERIFY(*renderGeometryRenderer.geometryFunctor() == *functor);
    }

    void checkInitialAndCleanedUpState()
    {
        // GIVEN
        Qt3DRender::Render::GeometryRenderer renderGeometryRenderer;

        // THEN
        QVERIFY(renderGeometryRenderer.peerUuid().isNull());
        QVERIFY(renderGeometryRenderer.geometryId().isNull());
        QCOMPARE(renderGeometryRenderer.isDirty(), false);
        QCOMPARE(renderGeometryRenderer.instanceCount(), 0);
        QCOMPARE(renderGeometryRenderer.primitiveCount(), 0);
        QCOMPARE(renderGeometryRenderer.baseVertex(), 0);
        QCOMPARE(renderGeometryRenderer.baseInstance(), 0);
        QCOMPARE(renderGeometryRenderer.restartIndex(), -1);
        QCOMPARE(renderGeometryRenderer.primitiveRestart(), false);
        QCOMPARE(renderGeometryRenderer.primitiveType(), Qt3DRender::QGeometryRenderer::Triangles);
        QVERIFY(renderGeometryRenderer.geometryFunctor().isNull());
        QVERIFY(renderGeometryRenderer.isEnabled());

        // GIVEN
        Qt3DRender::QGeometryRenderer geometryRenderer;
        Qt3DRender::QGeometry geometry;
        Qt3DRender::QGeometryFunctorPtr functor(new TestFunctor(1200));


        geometryRenderer.setInstanceCount(454);
        geometryRenderer.setPrimitiveCount(350);
        geometryRenderer.setBaseVertex(427);
        geometryRenderer.setBaseInstance(383);
        geometryRenderer.setRestartIndex(555);
        geometryRenderer.setPrimitiveRestart(true);
        geometryRenderer.setPrimitiveType(Qt3DRender::QGeometryRenderer::Patches);
        geometryRenderer.setGeometry(&geometry);
        geometryRenderer.setGeometryFunctor(functor);
        geometryRenderer.setEnabled(false);

        // WHEN
        renderGeometryRenderer.updateFromPeer(&geometryRenderer);
        renderGeometryRenderer.cleanup();

        // THEN
        QVERIFY(renderGeometryRenderer.peerUuid().isNull());
        QVERIFY(renderGeometryRenderer.geometryId().isNull());
        QCOMPARE(renderGeometryRenderer.isDirty(), false);
        QCOMPARE(renderGeometryRenderer.instanceCount(), 0);
        QCOMPARE(renderGeometryRenderer.primitiveCount(), 0);
        QCOMPARE(renderGeometryRenderer.baseVertex(), 0);
        QCOMPARE(renderGeometryRenderer.baseInstance(), 0);
        QCOMPARE(renderGeometryRenderer.restartIndex(), -1);
        QCOMPARE(renderGeometryRenderer.primitiveRestart(), false);
        QCOMPARE(renderGeometryRenderer.primitiveType(), Qt3DRender::QGeometryRenderer::Triangles);
        QVERIFY(renderGeometryRenderer.geometryFunctor().isNull());
        QVERIFY(renderGeometryRenderer.isEnabled());
    }

    void checkPropertyChanges()
    {
        // GIVEN
        Qt3DRender::Render::GeometryRenderer renderGeometryRenderer;

        QVERIFY(!renderGeometryRenderer.isDirty());

        // WHEN
        Qt3DCore::QScenePropertyChangePtr updateChange(new Qt3DCore::QScenePropertyChange(Qt3DCore::NodeUpdated, Qt3DCore::QSceneChange::Node, Qt3DCore::QNodeId()));
        updateChange->setPropertyName("instanceCount");
        updateChange->setValue(2);
        renderGeometryRenderer.sceneChangeEvent(updateChange);

        // THEN
        QCOMPARE(renderGeometryRenderer.instanceCount(), 2);
        QVERIFY(renderGeometryRenderer.isDirty());

        renderGeometryRenderer.unsetDirty();
        QVERIFY(!renderGeometryRenderer.isDirty());

        // WHEN
        updateChange.reset(new Qt3DCore::QScenePropertyChange(Qt3DCore::NodeUpdated, Qt3DCore::QSceneChange::Node, Qt3DCore::QNodeId()));
        updateChange->setPropertyName("primitiveCount");
        updateChange->setValue(56);
        renderGeometryRenderer.sceneChangeEvent(updateChange);

        // THEN
        QCOMPARE(renderGeometryRenderer.primitiveCount(), 56);
        QVERIFY(renderGeometryRenderer.isDirty());

        renderGeometryRenderer.unsetDirty();
        QVERIFY(!renderGeometryRenderer.isDirty());

        // WHEN
        updateChange.reset(new Qt3DCore::QScenePropertyChange(Qt3DCore::NodeUpdated, Qt3DCore::QSceneChange::Node, Qt3DCore::QNodeId()));
        updateChange->setPropertyName("baseVertex");
        updateChange->setValue(65);
        renderGeometryRenderer.sceneChangeEvent(updateChange);

        // THEN
        QCOMPARE(renderGeometryRenderer.baseVertex(), 65);
        QVERIFY(renderGeometryRenderer.isDirty());

        renderGeometryRenderer.unsetDirty();
        QVERIFY(!renderGeometryRenderer.isDirty());

        // WHEN
        updateChange.reset(new Qt3DCore::QScenePropertyChange(Qt3DCore::NodeUpdated, Qt3DCore::QSceneChange::Node, Qt3DCore::QNodeId()));
        updateChange->setPropertyName("baseInstance");
        updateChange->setValue(82);
        renderGeometryRenderer.sceneChangeEvent(updateChange);

        // THEN
        QCOMPARE(renderGeometryRenderer.baseInstance(), 82);
        QVERIFY(renderGeometryRenderer.isDirty());

        renderGeometryRenderer.unsetDirty();
        QVERIFY(!renderGeometryRenderer.isDirty());

        // WHEN
        updateChange.reset(new Qt3DCore::QScenePropertyChange(Qt3DCore::NodeUpdated, Qt3DCore::QSceneChange::Node, Qt3DCore::QNodeId()));
        updateChange->setPropertyName("restartIndex");
        updateChange->setValue(46);
        renderGeometryRenderer.sceneChangeEvent(updateChange);

        // THEN
        QCOMPARE(renderGeometryRenderer.restartIndex(), 46);
        QVERIFY(renderGeometryRenderer.isDirty());

        renderGeometryRenderer.unsetDirty();
        QVERIFY(!renderGeometryRenderer.isDirty());

        // WHEN
        updateChange.reset(new Qt3DCore::QScenePropertyChange(Qt3DCore::NodeUpdated, Qt3DCore::QSceneChange::Node, Qt3DCore::QNodeId()));
        updateChange->setPropertyName("primitiveRestart");
        updateChange->setValue(true);
        renderGeometryRenderer.sceneChangeEvent(updateChange);

        // THEN
        QCOMPARE(renderGeometryRenderer.primitiveRestart(), true);
        QVERIFY(renderGeometryRenderer.isDirty());

        renderGeometryRenderer.unsetDirty();
        QVERIFY(!renderGeometryRenderer.isDirty());

        // WHEN
        updateChange.reset(new Qt3DCore::QScenePropertyChange(Qt3DCore::NodeUpdated, Qt3DCore::QSceneChange::Node, Qt3DCore::QNodeId()));
        updateChange->setPropertyName("primitiveType");
        updateChange->setValue(static_cast<int>(Qt3DRender::QGeometryRenderer::LineLoop));
        renderGeometryRenderer.sceneChangeEvent(updateChange);

        // THEN
        QCOMPARE(renderGeometryRenderer.primitiveType(), Qt3DRender::QGeometryRenderer::LineLoop);
        QVERIFY(renderGeometryRenderer.isDirty());

        renderGeometryRenderer.unsetDirty();
        QVERIFY(!renderGeometryRenderer.isDirty());

        // WHEN
        updateChange.reset(new Qt3DCore::QScenePropertyChange(Qt3DCore::NodeUpdated, Qt3DCore::QSceneChange::Node, Qt3DCore::QNodeId()));
        updateChange->setPropertyName("geometryFunctor");
        Qt3DRender::QGeometryFunctorPtr functor(new TestFunctor(1450));
        updateChange->setValue(QVariant::fromValue(functor));
        renderGeometryRenderer.sceneChangeEvent(updateChange);

        // THEN
        QCOMPARE(renderGeometryRenderer.geometryFunctor(), functor);
        QVERIFY(renderGeometryRenderer.isDirty());

        renderGeometryRenderer.unsetDirty();
        QVERIFY(!renderGeometryRenderer.isDirty());

        // WHEN
        updateChange.reset(new Qt3DCore::QScenePropertyChange(Qt3DCore::NodeAdded, Qt3DCore::QSceneChange::Node, Qt3DCore::QNodeId()));
        Qt3DCore::QNodeId geometryId = Qt3DCore::QNodeId::createId();
        updateChange->setValue(QVariant::fromValue(geometryId));
        updateChange->setPropertyName("geometry");
        renderGeometryRenderer.sceneChangeEvent(updateChange);

        // THEN
        QCOMPARE(renderGeometryRenderer.geometryId(), geometryId);
        QVERIFY(renderGeometryRenderer.isDirty());

        renderGeometryRenderer.unsetDirty();
        QVERIFY(!renderGeometryRenderer.isDirty());

        // WHEN
        updateChange.reset(new Qt3DCore::QScenePropertyChange(Qt3DCore::NodeRemoved, Qt3DCore::QSceneChange::Node, Qt3DCore::QNodeId()));
        updateChange->setValue(QVariant::fromValue(geometryId));
        updateChange->setPropertyName("geometry");
        renderGeometryRenderer.sceneChangeEvent(updateChange);

        // THEN
        QCOMPARE(renderGeometryRenderer.geometryId(), Qt3DCore::QNodeId());
        QVERIFY(renderGeometryRenderer.isDirty());

        renderGeometryRenderer.unsetDirty();
        QVERIFY(!renderGeometryRenderer.isDirty());

        // WHEN
        updateChange.reset(new Qt3DCore::QScenePropertyChange(Qt3DCore::NodeUpdated, Qt3DCore::QSceneChange::Node, Qt3DCore::QNodeId()));
        updateChange->setValue(QVariant::fromValue(false));
        updateChange->setPropertyName("enabled");
        renderGeometryRenderer.sceneChangeEvent(updateChange);

        // THEN
        QCOMPARE(renderGeometryRenderer.isEnabled(), false);
        QVERIFY(!renderGeometryRenderer.isDirty());
    }
};

QTEST_APPLESS_MAIN(tst_RenderGeometryRenderer)

#include "tst_geometryrenderer.moc"