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#include <QTest>
#include <QSignalSpy>

#include <QtQuick3D/private/qquick3dgeometry_p.h>

#include <QtQuick3DRuntimeRender/private/qssgrendergeometry_p.h>

class tst_QQuick3DGeometry : public QObject
{
    Q_OBJECT

    // Work-around to get access to updateSpatialNode
    class Geometry : public QQuick3DGeometry
    {
    public:
        using QQuick3DGeometry::updateSpatialNode;
    };

private slots:
    void testProperties();
    void testGeometry();
};

void tst_QQuick3DGeometry::testProperties()
{
    Geometry geom;
    auto node = static_cast<QSSGRenderGeometry *>(geom.updateSpatialNode(nullptr));
    const auto originalNode = node; // for comparisons later...
    QVERIFY(node);

    const QString name = QStringLiteral("MyGeometry");
    geom.setName(name);
    node = static_cast<QSSGRenderGeometry *>(geom.updateSpatialNode(node));
    QCOMPARE(name, geom.name());
    QCOMPARE(name, node->path());
    QCOMPARE(originalNode, node);
}

void tst_QQuick3DGeometry::testGeometry()
{
    QSSGRenderGeometry geom;

    const QString path = QStringLiteral("MyPath");
    geom.setPath(path);
    QCOMPARE(path, geom.path());

    QByteArray vertexData;
    vertexData.resize(100);
    vertexData.fill(0);
    geom.setVertexData(vertexData);
    QCOMPARE(vertexData.size(), geom.vertexBuffer().size());
    QVERIFY(geom.vertexBuffer().compare(vertexData) == 0);

    QByteArray indexData;
    indexData.resize(100);
    indexData.fill(0);
    geom.setIndexData(indexData);
    QCOMPARE(indexData.size(), geom.indexBuffer().size());
    QVERIFY(geom.indexBuffer().compare(indexData) == 0);

    const int stride = 20;
    geom.setStride(stride);
    QCOMPARE(stride, geom.stride());

    const QVector3D minimum(-10.f, -10.f, -10.f);
    const QVector3D maximum(10.f, 10.f, 10.f);
    geom.setBounds(minimum, maximum);
    QVERIFY(qFuzzyCompare(minimum, geom.boundsMin()));
    QVERIFY(qFuzzyCompare(maximum, geom.boundsMax()));

    geom.clear();
    QSSGBounds3 emptyBounds = QSSGBounds3::empty();
    QCOMPARE(geom.vertexBuffer().size(), 0);
    QCOMPARE(geom.indexBuffer().size(), 0);
    QVERIFY(qFuzzyCompare(emptyBounds.minimum, geom.boundsMin()));
    QVERIFY(qFuzzyCompare(emptyBounds.maximum, geom.boundsMax()));
    QCOMPARE(geom.attributeCount(), 0);

    const QSSGRenderGeometry::PrimitiveType primitiveTypes[] = {
        QSSGRenderGeometry::Points,
        QSSGRenderGeometry::LineStrip,
        QSSGRenderGeometry::LineLoop,
        QSSGRenderGeometry::Lines,
        QSSGRenderGeometry::TriangleStrip,
        QSSGRenderGeometry::TriangleFan,
        QSSGRenderGeometry::Triangles,
        QSSGRenderGeometry::Patches
    };
    for (const auto primitiveType : primitiveTypes) {
        geom.setPrimitiveType(primitiveType);
        QCOMPARE(primitiveType, geom.primitiveType());
    }

    const QSSGRenderGeometry::Attribute::Semantic semantics[] = {
        QSSGRenderGeometry::Attribute::IndexSemantic,
        QSSGRenderGeometry::Attribute::PositionSemantic,
        QSSGRenderGeometry::Attribute::NormalSemantic,
        QSSGRenderGeometry::Attribute::TexCoordSemantic,
        QSSGRenderGeometry::Attribute::TangentSemantic,
        QSSGRenderGeometry::Attribute::BinormalSemantic,
    };

    const int offsets[] = {
        0, 16, 21, 33, 46, 52,
    };

    const QSSGRenderGeometry::Attribute::ComponentType types[] = {
        QSSGRenderGeometry::Attribute::U8Type,
        QSSGRenderGeometry::Attribute::I8Type,
        QSSGRenderGeometry::Attribute::U16Type,
        QSSGRenderGeometry::Attribute::I16Type,
        QSSGRenderGeometry::Attribute::U32Type,
        QSSGRenderGeometry::Attribute::I32Type,
        QSSGRenderGeometry::Attribute::U64Type,
        QSSGRenderGeometry::Attribute::I64Type,
        QSSGRenderGeometry::Attribute::F16Type,
        QSSGRenderGeometry::Attribute::F32Type,
        QSSGRenderGeometry::Attribute::F64Type
    };

    for (int i = 0; i < 6; i++) {
        geom.addAttribute(semantics[i], offsets[i], QSSGRenderGeometry::Attribute::F32Type);
        QCOMPARE(semantics[i], geom.attribute(i).semantic);
        QCOMPARE(offsets[i], geom.attribute(i).offset);
        QCOMPARE(geom.attributeCount(), i+1);
    }
    QCOMPARE(geom.attributeCount(), 6);
    geom.clear();
    QCOMPARE(geom.attributeCount(), 0);

    for (auto componentType : types) {
        geom.addAttribute(QSSGRenderGeometry::Attribute::PositionSemantic, 0, componentType);
        QCOMPARE(componentType, geom.attribute(0).componentType);
        geom.clear();
    }
}


QTEST_APPLESS_MAIN(tst_QQuick3DGeometry)
#include "tst_qquick3dgeometry.moc"
