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#include <QtTest/QtTest>
#include <Qt3DRender/private/entity_p.h>

#include <Qt3DCore/QCameraLens>
#include <Qt3DCore/QScenePropertyChange>
#include <Qt3DCore/QTransform>

#include <Qt3DRender/QMesh>
#include <Qt3DRender/QMaterial>
#include <Qt3DRender/QLayer>
#include <Qt3DRender/QShaderData>
#include <Qt3DRender/QGeometryRenderer>

typedef Qt3DCore::QNodeId (*UuidMethod)(Qt3DRender::Render::Entity *);
typedef QList<Qt3DCore::QNodeId> (*UuidListMethod)(Qt3DRender::Render::Entity *);

using namespace Qt3DCore;
using namespace Qt3DRender;
using namespace Qt3DRender::Render;

void noopDeleter(QNode *) {}


QNodeId transformUuid(Entity *entity) { return entity->componentUuid<Transform>(); }
QNodeId cameraLensUuid(Entity *entity) { return entity->componentUuid<CameraLens>(); }
QNodeId materialUuid(Entity *entity) { return entity->componentUuid<Material>(); }
QNodeId geometryRendererUuid(Entity *entity) { return entity->componentUuid<GeometryRenderer>(); }

QList<QNodeId> layersUuid(Entity *entity) { return entity->componentsUuid<Layer>(); }
QList<QNodeId> shadersUuid(Entity *entity) { return entity->componentsUuid<ShaderData>(); }

class tst_RenderEntity : public QObject
{
    Q_OBJECT
public:
    tst_RenderEntity() {}
    ~tst_RenderEntity() {}

private slots:
    void shouldHandleSingleComponentEvents_data()
    {
        QTest::addColumn<QComponent*>("component");
        QTest::addColumn<void*>("functionPtr");

        QComponent *component = new Qt3DCore::QTransform;
        QTest::newRow("transform") << component << reinterpret_cast<void*>(transformUuid);

        component = new QGeometryRenderer;
        QTest::newRow("mesh") << component << reinterpret_cast<void*>(geometryRendererUuid);

        component = new QCameraLens;
        QTest::newRow("camera lens") << component << reinterpret_cast<void*>(cameraLensUuid);

        component = new QMaterial;
        QTest::newRow("material") << component << reinterpret_cast<void*>(materialUuid);
    }

    void shouldHandleSingleComponentEvents()
    {
        // GIVEN
        QFETCH(QComponent*, component);
        QFETCH(void*, functionPtr);
        UuidMethod method = reinterpret_cast<UuidMethod>(functionPtr);

        Entity entity;

        // THEN
        QVERIFY(method(&entity).isNull());

        // WHEN
        QScenePropertyChangePtr addChange(new QScenePropertyChange(ComponentAdded, QSceneChange::Node, component->id()));
        addChange->setPropertyName("component");
        addChange->setValue(QVariant::fromValue(QNodePtr(component, noopDeleter)));
        entity.sceneChangeEvent(addChange);

        // THEN
        QCOMPARE(method(&entity), component->id());

        // WHEN
        QScenePropertyChangePtr removeChange(new QScenePropertyChange(ComponentRemoved, QSceneChange::Node, component->id()));
        removeChange->setPropertyName("componentId");
        removeChange->setValue(QVariant::fromValue(component->id()));
        entity.sceneChangeEvent(removeChange);

        // THEN
        QVERIFY(method(&entity).isNull());

        delete component;
    }

    void shouldHandleComponentsEvents_data()
    {
        QTest::addColumn< QList<QComponent*> >("components");
        QTest::addColumn<void*>("functionPtr");

        QList<QComponent*> components;

        components.clear();
        components << new QLayer << new QLayer << new QLayer;
        QTest::newRow("layers") << components << reinterpret_cast<void*>(layersUuid);

        components.clear();
        components << new QShaderData << new QShaderData << new QShaderData;
        QTest::newRow("shader data") << components << reinterpret_cast<void*>(shadersUuid);
    }

    void shouldHandleComponentsEvents()
    {
        // GIVEN
        QFETCH(QList<QComponent*>, components);
        QFETCH(void*, functionPtr);
        UuidListMethod method = reinterpret_cast<UuidListMethod>(functionPtr);

        Entity entity;

        // THEN
        QVERIFY(method(&entity).isEmpty());

        // WHEN
        Q_FOREACH (QComponent *component, components) {
            QScenePropertyChangePtr addChange(new QScenePropertyChange(ComponentAdded, QSceneChange::Node, component->id()));
            addChange->setPropertyName("component");
            addChange->setValue(QVariant::fromValue(QNodePtr(component, noopDeleter)));
            entity.sceneChangeEvent(addChange);
        }

        // THEN
        QCOMPARE(method(&entity).size(), components.size());
        Q_FOREACH (QComponent *component, components) {
            QVERIFY(method(&entity).contains(component->id()));
        }

        // WHEN
        QScenePropertyChangePtr removeChange(new QScenePropertyChange(ComponentRemoved, QSceneChange::Node, components.first()->id()));
        removeChange->setPropertyName("componentId");
        removeChange->setValue(QVariant::fromValue(components.first()->id()));
        entity.sceneChangeEvent(removeChange);

        // THEN
        QCOMPARE(method(&entity).size(), components.size() - 1);
        QVERIFY(!method(&entity).contains(components.first()->id()));

        qDeleteAll(components);
    }
};

QTEST_APPLESS_MAIN(tst_RenderEntity)

#include "tst_entity.moc"