/****************************************************************************
**
** 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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** 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 <QtTest/QSignalSpy>
#include <Qt3DCore/private/qnode_p.h>
#include <Qt3DCore/private/qscene_p.h>
#include <Qt3DRender/QObjectPicker>
#include <Qt3DRender/QPickEvent>

#include "testpostmanarbiter.h"

class MyObjectPicker : public Qt3DRender::QObjectPicker
{
    Q_OBJECT
public:
    MyObjectPicker(Qt3DCore::QNode *parent = nullptr)
        : Qt3DRender::QObjectPicker(parent)
    {}

    void sceneChangeEvent(const Qt3DCore::QSceneChangePtr &change) Q_DECL_FINAL
    {
        Qt3DRender::QObjectPicker::sceneChangeEvent(change);
    }

private:
    friend class tst_ObjectPicker;

};

// We need to call QNode::clone which is protected
// So we sublcass QNode instead of QObject
class tst_QObjectPicker : public Qt3DCore::QNode
{
    Q_OBJECT
public:
    tst_QObjectPicker()
    {
        qRegisterMetaType<Qt3DRender::QPickEvent*>("Qt3DRender::QPickEvent*");
    }

    ~tst_QObjectPicker()
    {
        QMetaObject::invokeMethod(this, "_q_cleanup", Qt::DirectConnection);
    }

private Q_SLOTS:

    void checkCloning_data()
    {
        QTest::addColumn<Qt3DRender::QObjectPicker *>("objectPicker");

        Qt3DRender::QObjectPicker *objectPicker = new Qt3DRender::QObjectPicker();
        QTest::newRow("empty objectPicker") << objectPicker;
        objectPicker = new Qt3DRender::QObjectPicker();
        objectPicker->setHoverEnabled(true);
        QTest::newRow("objectPicker_all_true") << objectPicker;
    }

    // TODO: Avoid cloning here
//    void checkCloning()
//    {
//        // GIVEN
//        QFETCH(Qt3DRender::QObjectPicker *, objectPicker);

//        // WHEN
//        Qt3DRender::QObjectPicker *clone = static_cast<Qt3DRender::QObjectPicker *>(QNode::clone(objectPicker));
//        QCoreApplication::processEvents();

//        // THEN
//        QVERIFY(clone != nullptr);
//        QCOMPARE(objectPicker->id(), clone->id());
//        QCOMPARE(objectPicker->isHoverEnabled(), clone->isHoverEnabled());
//        QCOMPARE(objectPicker->isPressed(), clone->isPressed());
//        QCOMPARE(objectPicker->containsMouse(), clone->containsMouse());
//    }

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

        // WHEN
        objectPicker->setHoverEnabled(true);
        QCoreApplication::processEvents();

        // THEN
        QCOMPARE(arbiter.events.size(), 1);
        Qt3DCore::QPropertyUpdatedChangePtr change = arbiter.events.last().staticCast<Qt3DCore::QPropertyUpdatedChange>();
        QCOMPARE(change->propertyName(), "hoverEnabled");
        QCOMPARE(change->value().toBool(), true);
        QCOMPARE(change->type(), Qt3DCore::PropertyUpdated);

        arbiter.events.clear();
    }

    void checkBackendUpdates_data()
    {
        QTest::addColumn<QByteArray>("signalPrototype");
        QTest::addColumn<QByteArray>("propertyName");
        QTest::addColumn<bool>("requiresEvent");

        QTest::newRow("clicked")
                << QByteArray(SIGNAL(clicked(Qt3DRender::QPickEvent *)))
                << QByteArrayLiteral("clicked")
                << true;

        QTest::newRow("pressed")
                << QByteArray(SIGNAL(pressed(Qt3DRender::QPickEvent *)))
                << QByteArrayLiteral("pressed")
                << true;

        QTest::newRow("released")
                << QByteArray(SIGNAL(released(Qt3DRender::QPickEvent *)))
                << QByteArrayLiteral("released")
                << true;

        QTest::newRow("entered")
                << QByteArray(SIGNAL(entered()))
                << QByteArrayLiteral("entered")
                << false;

        QTest::newRow("exited")
                << QByteArray(SIGNAL(exited()))
                << QByteArrayLiteral("exited")
                << false;
    }

    void checkBackendUpdates()
    {
        // GIVEN
        QFETCH(QByteArray, signalPrototype);
        QFETCH(QByteArray, propertyName);
        QFETCH(bool, requiresEvent);
        QScopedPointer<MyObjectPicker> objectPicker(new MyObjectPicker());
        QSignalSpy spy(objectPicker.data(), signalPrototype.constData());
        Qt3DRender::QPickEventPtr event(new Qt3DRender::QPickEvent());

        // WHEN
        // Create Backend Change and distribute it to frontend node
        Qt3DCore::QPropertyUpdatedChangePtr e(new Qt3DCore::QPropertyUpdatedChange(objectPicker->id()));
        e->setPropertyName(propertyName.constData());
        if (requiresEvent)
        {
            QVariant v;
            v.setValue<Qt3DRender::QPickEventPtr>(event);
            e->setValue(v);
        }
        objectPicker->sceneChangeEvent(e);

        // THEN
        // Check that the QObjectPicker triggers the expected signal
        QCOMPARE(spy.count(), 1);
    }
};

QTEST_MAIN(tst_QObjectPicker)

#include "tst_qobjectpicker.moc"