/****************************************************************************
**
** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
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** Licensees holding valid commercial Qt licenses may use this file in
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** GNU General Public License Usage
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** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
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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 <Qt3DRender/QAttribute>
#include <Qt3DRender/private/qattribute_p.h>
#include <Qt3DRender/QBuffer>

#include "testpostmanarbiter.h"

class tst_QAttribute: public QObject
{
    Q_OBJECT
public:
    tst_QAttribute()
    {
        qRegisterMetaType<Qt3DRender::QBuffer*>("Qt3DCore::QBuffer*");
    }

private Q_SLOTS:
    void shouldHaveDefaultAttributeNames()
    {
        // GIVEN
        Qt3DRender::QAttribute attribute;

        // THEN
        QCOMPARE(Qt3DRender::QAttribute::defaultPositionAttributeName(), QStringLiteral("vertexPosition"));
        QCOMPARE(Qt3DRender::QAttribute::defaultNormalAttributeName(), QStringLiteral("vertexNormal"));
        QCOMPARE(Qt3DRender::QAttribute::defaultColorAttributeName(), QStringLiteral("vertexColor"));
        QCOMPARE(Qt3DRender::QAttribute::defaultTextureCoordinateAttributeName(), QStringLiteral("vertexTexCoord"));
        QCOMPARE(Qt3DRender::QAttribute::defaultTangentAttributeName(), QStringLiteral("vertexTangent"));
        QCOMPARE(Qt3DRender::QAttribute::defaultJointIndicesAttributeName(), QStringLiteral("vertexJointIndices"));
        QCOMPARE(Qt3DRender::QAttribute::defaultJointWeightsAttributeName(), QStringLiteral("vertexJointWeights"));

        QCOMPARE(attribute.property("defaultPositionAttributeName").toString(),
                 Qt3DRender::QAttribute::defaultPositionAttributeName());
        QCOMPARE(attribute.property("defaultNormalAttributeName").toString(),
                 Qt3DRender::QAttribute::defaultNormalAttributeName());
        QCOMPARE(attribute.property("defaultColorAttributeName").toString(),
                 Qt3DRender::QAttribute::defaultColorAttributeName());
        QCOMPARE(attribute.property("defaultTextureCoordinateAttributeName").toString(),
                 Qt3DRender::QAttribute::defaultTextureCoordinateAttributeName());
        QCOMPARE(attribute.property("defaultTangentAttributeName").toString(),
                 Qt3DRender::QAttribute::defaultTangentAttributeName());
        QCOMPARE(attribute.property("defaultJointIndicesAttributeName").toString(),
                 Qt3DRender::QAttribute::defaultJointIndicesAttributeName());
        QCOMPARE(attribute.property("defaultJointWeightsAttributeName").toString(),
                 Qt3DRender::QAttribute::defaultJointWeightsAttributeName());
    }

    void checkCloning_data()
    {
        QTest::addColumn<Qt3DRender::QAttribute *>("attribute");

        Qt3DRender::QAttribute *defaultConstructed = new Qt3DRender::QAttribute();
        QTest::newRow("defaultConstructed") << defaultConstructed;

        Qt3DRender::QAttribute *customVertex = new Qt3DRender::QAttribute();
        Qt3DRender::QBuffer *buffer = new Qt3DRender::QBuffer();
        customVertex->setBuffer(buffer);
        customVertex->setAttributeType(Qt3DRender::QAttribute::VertexAttribute);
        customVertex->setCount(454);
        customVertex->setByteStride(427);
        customVertex->setByteOffset(305);
        customVertex->setDivisor(235);
        customVertex->setName("BB");
        customVertex->setVertexBaseType(Qt3DRender::QAttribute::Float);
        customVertex->setVertexSize(4);
        QTest::newRow("vertex") << customVertex;

        Qt3DRender::QAttribute *customIndex = new Qt3DRender::QAttribute();
        Qt3DRender::QBuffer *indexBuffer = new Qt3DRender::QBuffer();
        customIndex->setBuffer(indexBuffer);
        customIndex->setAttributeType(Qt3DRender::QAttribute::IndexAttribute);
        customIndex->setCount(383);
        customIndex->setByteStride(350);
        customIndex->setByteOffset(327);
        customIndex->setDivisor(355);
        customIndex->setName("SB");
        customIndex->setVertexBaseType(Qt3DRender::QAttribute::Float);
        customIndex->setVertexSize(3);
        QTest::newRow("index") << customIndex;

        Qt3DRender::QAttribute *customIndirect = new Qt3DRender::QAttribute();
        Qt3DRender::QBuffer *indirectBuffer = new Qt3DRender::QBuffer();
        customIndirect->setBuffer(indirectBuffer);
        customIndirect->setAttributeType(Qt3DRender::QAttribute::DrawIndirectAttribute);
        customIndirect->setCount(1);
        customIndirect->setByteStride(12);
        customIndirect->setByteOffset(0);
        customIndirect->setName("DrawIndirect");
        QTest::newRow("index") << customIndirect;
    }

    void checkCloning()
    {
        // GIVEN
        QFETCH(Qt3DRender::QAttribute *, attribute);

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

        // THEN
        QCOMPARE(creationChanges.size(), 1 + (attribute->buffer() ? 1 : 0));

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

        QCOMPARE(attribute->id(), creationChangeData->subjectId());
        QCOMPARE(attribute->isEnabled(), creationChangeData->isNodeEnabled());
        QCOMPARE(attribute->metaObject(), creationChangeData->metaObject());
        QCOMPARE(attribute->name(), cloneData.name);
        QCOMPARE(attribute->count(), cloneData.count);
        QCOMPARE(attribute->byteStride(), cloneData.byteStride);
        QCOMPARE(attribute->byteOffset(), cloneData.byteOffset);
        QCOMPARE(attribute->divisor(), cloneData.divisor);
        QCOMPARE(attribute->vertexBaseType(), cloneData.vertexBaseType);
        QCOMPARE(attribute->vertexSize(), cloneData.vertexSize);
        QVERIFY(attribute->attributeType() == cloneData.attributeType);
        QCOMPARE(attribute->buffer() ? attribute->buffer()->id() : Qt3DCore::QNodeId(), cloneData.bufferId);
    }

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

        // WHEN
        attribute->setVertexBaseType(Qt3DRender::QAttribute::Double);

        // THEN
        QCOMPARE(arbiter.dirtyNodes.size(), 1);
        QCOMPARE(arbiter.dirtyNodes.front(), attribute.data());

        arbiter.dirtyNodes.clear();

        // WHEN
        attribute->setVertexSize(4);

        // THEN
        QCOMPARE(arbiter.dirtyNodes.size(), 1);
        QCOMPARE(arbiter.dirtyNodes.front(), attribute.data());

        arbiter.dirtyNodes.clear();

        // WHEN
        attribute->setName(QStringLiteral("Duntov"));

        // THEN
        QCOMPARE(arbiter.dirtyNodes.size(), 1);
        QCOMPARE(arbiter.dirtyNodes.front(), attribute.data());

        arbiter.dirtyNodes.clear();

        // WHEN
        attribute->setCount(883);

        // THEN
        QCOMPARE(arbiter.dirtyNodes.size(), 1);
        QCOMPARE(arbiter.dirtyNodes.front(), attribute.data());

        arbiter.dirtyNodes.clear();

        // WHEN
        attribute->setByteStride(1340);

        // THEN
        QCOMPARE(arbiter.dirtyNodes.size(), 1);
        QCOMPARE(arbiter.dirtyNodes.front(), attribute.data());

        arbiter.dirtyNodes.clear();

        // WHEN
        attribute->setByteOffset(1584);

        // THEN
        QCOMPARE(arbiter.dirtyNodes.size(), 1);
        QCOMPARE(arbiter.dirtyNodes.front(), attribute.data());

        arbiter.dirtyNodes.clear();

        // WHEN
        attribute->setDivisor(1450);

        // THEN
        QCOMPARE(arbiter.dirtyNodes.size(), 1);
        QCOMPARE(arbiter.dirtyNodes.front(), attribute.data());

        arbiter.dirtyNodes.clear();

        // WHEN
        attribute->setAttributeType(Qt3DRender::QAttribute::IndexAttribute);

        // THEN
        QCOMPARE(arbiter.dirtyNodes.size(), 1);
        QCOMPARE(arbiter.dirtyNodes.front(), attribute.data());

        arbiter.dirtyNodes.clear();

        // WHEN
        Qt3DRender::QBuffer buf;
        attribute->setBuffer(&buf);

        // THEN
        QCOMPARE(arbiter.dirtyNodes.size(), 1);
        QCOMPARE(arbiter.dirtyNodes.front(), attribute.data());

        arbiter.dirtyNodes.clear();

        // WHEN
        Qt3DRender::QBuffer buf2;
        attribute->setBuffer(&buf2);

        // THEN
        QCOMPARE(arbiter.dirtyNodes.size(), 1);
        QCOMPARE(arbiter.dirtyNodes.front(), attribute.data());

        arbiter.dirtyNodes.clear();
    }

    void checkBufferBookkeeping()
    {
        // GIVEN
        QScopedPointer<Qt3DRender::QAttribute> attribute(new Qt3DRender::QAttribute);
        {
            // WHEN
            Qt3DRender::QBuffer buf;
            attribute->setBuffer(&buf);

            // THEN
            QCOMPARE(buf.parent(), attribute.data());
            QCOMPARE(attribute->buffer(), &buf);
        }
        // THEN (Should not crash and parameter be unset)
        QVERIFY(attribute->buffer() == nullptr);

        {
            // WHEN
            Qt3DRender::QAttribute someOtherAttribute;
            QScopedPointer<Qt3DRender::QBuffer> buf(new Qt3DRender::QBuffer(&someOtherAttribute));
            attribute->setBuffer(buf.data());

            // THEN
            QCOMPARE(buf->parent(), &someOtherAttribute);
            QCOMPARE(attribute->buffer(), buf.data());

            // WHEN
            attribute.reset();
            buf.reset();

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

QTEST_MAIN(tst_QAttribute)

#include "tst_qattribute.moc"