/********************************************************************
Copyright 2014  Martin Gräßlin <mgraesslin@kde.org>

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) version 3, or any
later version accepted by the membership of KDE e.V. (or its
successor approved by the membership of KDE e.V.), which shall
act as a proxy defined in Section 6 of version 3 of the license.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library.  If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
// Qt
#include <QtTest/QtTest>
// KWayland
#include "../../src/client/connection_thread.h"
#include "../../src/client/event_queue.h"
#include "../../src/client/datadevice.h"
#include "../../src/client/datadevicemanager.h"
#include "../../src/client/datasource.h"
#include "../../src/client/compositor.h"
#include "../../src/client/pointer.h"
#include "../../src/client/registry.h"
#include "../../src/client/seat.h"
#include "../../src/client/surface.h"
#include "../../src/server/display.h"
#include "../../src/server/datadevicemanager_interface.h"
#include "../../src/server/datasource_interface.h"
#include "../../src/server/compositor_interface.h"
#include "../../src/server/pointer_interface.h"
#include "../../src/server/seat_interface.h"
#include "../../src/server/surface_interface.h"
// Wayland
#include <wayland-client.h>

class TestDataDevice : public QObject
{
    Q_OBJECT
private Q_SLOTS:
    void init();
    void cleanup();

    void testCreate();
    void testDrag();
    void testDragInternally();
    void testSetSelection();
    void testDestroy();

private:
    KWayland::Server::Display *m_display = nullptr;
    KWayland::Server::DataDeviceManagerInterface *m_dataDeviceManagerInterface = nullptr;
    KWayland::Server::CompositorInterface *m_compositorInterface = nullptr;
    KWayland::Server::SeatInterface *m_seatInterface = nullptr;
    KWayland::Client::ConnectionThread *m_connection = nullptr;
    KWayland::Client::DataDeviceManager *m_dataDeviceManager = nullptr;
    KWayland::Client::Compositor *m_compositor = nullptr;
    KWayland::Client::Seat *m_seat = nullptr;
    KWayland::Client::EventQueue *m_queue = nullptr;
    QThread *m_thread = nullptr;
};

static const QString s_socketName = QStringLiteral("kwayland-test-wayland-datadevice-0");

void TestDataDevice::init()
{
    using namespace KWayland::Server;
    delete m_display;
    m_display = new Display(this);
    m_display->setSocketName(s_socketName);
    m_display->start();
    QVERIFY(m_display->isRunning());

    // setup connection
    m_connection = new KWayland::Client::ConnectionThread;
    QSignalSpy connectedSpy(m_connection, SIGNAL(connected()));
    m_connection->setSocketName(s_socketName);

    m_thread = new QThread(this);
    m_connection->moveToThread(m_thread);
    m_thread->start();

    m_connection->initConnection();
    QVERIFY(connectedSpy.wait());

    m_queue = new KWayland::Client::EventQueue(this);
    QVERIFY(!m_queue->isValid());
    m_queue->setup(m_connection);
    QVERIFY(m_queue->isValid());

    KWayland::Client::Registry registry;
    QSignalSpy dataDeviceManagerSpy(&registry, SIGNAL(dataDeviceManagerAnnounced(quint32,quint32)));
    QVERIFY(dataDeviceManagerSpy.isValid());
    QSignalSpy seatSpy(&registry, SIGNAL(seatAnnounced(quint32,quint32)));
    QVERIFY(seatSpy.isValid());
    QSignalSpy compositorSpy(&registry, SIGNAL(compositorAnnounced(quint32,quint32)));
    QVERIFY(compositorSpy.isValid());
    QVERIFY(!registry.eventQueue());
    registry.setEventQueue(m_queue);
    QCOMPARE(registry.eventQueue(), m_queue);
    registry.create(m_connection->display());
    QVERIFY(registry.isValid());
    registry.setup();

    m_dataDeviceManagerInterface = m_display->createDataDeviceManager(m_display);
    m_dataDeviceManagerInterface->create();
    QVERIFY(m_dataDeviceManagerInterface->isValid());

    QVERIFY(dataDeviceManagerSpy.wait());
    m_dataDeviceManager = registry.createDataDeviceManager(dataDeviceManagerSpy.first().first().value<quint32>(),
                                                           dataDeviceManagerSpy.first().last().value<quint32>(), this);

    m_seatInterface = m_display->createSeat(m_display);
    m_seatInterface->setHasPointer(true);
    m_seatInterface->create();
    QVERIFY(m_seatInterface->isValid());

    QVERIFY(seatSpy.wait());
    m_seat = registry.createSeat(seatSpy.first().first().value<quint32>(),
                                 seatSpy.first().last().value<quint32>(), this);
    QVERIFY(m_seat->isValid());
    QSignalSpy pointerChangedSpy(m_seat, SIGNAL(hasPointerChanged(bool)));
    QVERIFY(pointerChangedSpy.isValid());
    QVERIFY(pointerChangedSpy.wait());

    m_compositorInterface = m_display->createCompositor(m_display);
    m_compositorInterface->create();
    QVERIFY(m_compositorInterface->isValid());

    QVERIFY(compositorSpy.wait());
    m_compositor = registry.createCompositor(compositorSpy.first().first().value<quint32>(),
                                             compositorSpy.first().last().value<quint32>(), this);
    QVERIFY(m_compositor->isValid());
}

void TestDataDevice::cleanup()
{
    if (m_dataDeviceManager) {
        delete m_dataDeviceManager;
        m_dataDeviceManager = nullptr;
    }
    if (m_seat) {
        delete m_seat;
        m_seat = nullptr;
    }
    if (m_compositor) {
        delete m_compositor;
        m_compositor = nullptr;
    }
    if (m_queue) {
        delete m_queue;
        m_queue = nullptr;
    }
    if (m_thread) {
        m_thread->quit();
        m_thread->wait();
        delete m_thread;
        m_thread = nullptr;
    }
    delete m_connection;
    m_connection = nullptr;

    delete m_display;
    m_display = nullptr;
}

void TestDataDevice::testCreate()
{
    using namespace KWayland::Client;
    using namespace KWayland::Server;

    QSignalSpy dataDeviceCreatedSpy(m_dataDeviceManagerInterface, SIGNAL(dataDeviceCreated(KWayland::Server::DataDeviceInterface*)));
    QVERIFY(dataDeviceCreatedSpy.isValid());

    QScopedPointer<DataDevice> dataDevice(m_dataDeviceManager->getDataDevice(m_seat));
    QVERIFY(dataDevice->isValid());

    QVERIFY(dataDeviceCreatedSpy.wait());
    QCOMPARE(dataDeviceCreatedSpy.count(), 1);
    auto deviceInterface = dataDeviceCreatedSpy.first().first().value<DataDeviceInterface*>();
    QVERIFY(deviceInterface);
    QCOMPARE(deviceInterface->seat(), m_seatInterface);
    QVERIFY(!deviceInterface->dragSource());
    QVERIFY(!deviceInterface->origin());
    QVERIFY(!deviceInterface->icon());
    QVERIFY(!deviceInterface->selection());
    QVERIFY(deviceInterface->parentResource());

    // and destroy
    QSignalSpy destroyedSpy(deviceInterface, &QObject::destroyed);
    QVERIFY(destroyedSpy.isValid());
    dataDevice.reset();
    QVERIFY(destroyedSpy.wait());
}

void TestDataDevice::testDrag()
{
    using namespace KWayland::Client;
    using namespace KWayland::Server;
    QScopedPointer<Pointer> pointer(m_seat->createPointer());

    QSignalSpy dataDeviceCreatedSpy(m_dataDeviceManagerInterface, SIGNAL(dataDeviceCreated(KWayland::Server::DataDeviceInterface*)));
    QVERIFY(dataDeviceCreatedSpy.isValid());

    QScopedPointer<DataDevice> dataDevice(m_dataDeviceManager->getDataDevice(m_seat));
    QVERIFY(dataDevice->isValid());

    QVERIFY(dataDeviceCreatedSpy.wait());
    QCOMPARE(dataDeviceCreatedSpy.count(), 1);
    auto deviceInterface = dataDeviceCreatedSpy.first().first().value<DataDeviceInterface*>();
    QVERIFY(deviceInterface);

    QSignalSpy dataSourceCreatedSpy(m_dataDeviceManagerInterface, SIGNAL(dataSourceCreated(KWayland::Server::DataSourceInterface*)));
    QVERIFY(dataDeviceCreatedSpy.isValid());

    QScopedPointer<DataSource> dataSource(m_dataDeviceManager->createDataSource());
    QVERIFY(dataSource->isValid());

    QVERIFY(dataSourceCreatedSpy.wait());
    QCOMPARE(dataSourceCreatedSpy.count(), 1);
    auto sourceInterface = dataSourceCreatedSpy.first().first().value<DataSourceInterface*>();
    QVERIFY(sourceInterface);

    QSignalSpy surfaceCreatedSpy(m_compositorInterface, SIGNAL(surfaceCreated(KWayland::Server::SurfaceInterface*)));
    QVERIFY(surfaceCreatedSpy.isValid());

    QScopedPointer<Surface> surface(m_compositor->createSurface());
    QVERIFY(surface->isValid());

    QVERIFY(surfaceCreatedSpy.wait());
    QCOMPARE(surfaceCreatedSpy.count(), 1);
    auto surfaceInterface = surfaceCreatedSpy.first().first().value<SurfaceInterface*>();

    // now we have all we need to start a drag operation
    QSignalSpy dragStartedSpy(deviceInterface, SIGNAL(dragStarted()));
    QVERIFY(dragStartedSpy.isValid());

    // first we need to fake the pointer enter
    m_seatInterface->setFocusedPointerSurface(surfaceInterface);
    m_seatInterface->pointerButtonPressed(1);

    QCoreApplication::processEvents();

    dataDevice->startDrag(1, dataSource.data(), surface.data());
    QVERIFY(dragStartedSpy.wait());
    QCOMPARE(dragStartedSpy.count(), 1);
    QCOMPARE(deviceInterface->dragSource(), sourceInterface);
    QCOMPARE(deviceInterface->origin(), surfaceInterface);
    QVERIFY(!deviceInterface->icon());
}

void TestDataDevice::testDragInternally()
{
    using namespace KWayland::Client;
    using namespace KWayland::Server;
    QScopedPointer<Pointer> pointer(m_seat->createPointer());

    QSignalSpy dataDeviceCreatedSpy(m_dataDeviceManagerInterface, SIGNAL(dataDeviceCreated(KWayland::Server::DataDeviceInterface*)));
    QVERIFY(dataDeviceCreatedSpy.isValid());

    QScopedPointer<DataDevice> dataDevice(m_dataDeviceManager->getDataDevice(m_seat));
    QVERIFY(dataDevice->isValid());

    QVERIFY(dataDeviceCreatedSpy.wait());
    QCOMPARE(dataDeviceCreatedSpy.count(), 1);
    auto deviceInterface = dataDeviceCreatedSpy.first().first().value<DataDeviceInterface*>();
    QVERIFY(deviceInterface);

    QSignalSpy surfaceCreatedSpy(m_compositorInterface, SIGNAL(surfaceCreated(KWayland::Server::SurfaceInterface*)));
    QVERIFY(surfaceCreatedSpy.isValid());

    QScopedPointer<Surface> surface(m_compositor->createSurface());
    QVERIFY(surface->isValid());

    QVERIFY(surfaceCreatedSpy.wait());
    QCOMPARE(surfaceCreatedSpy.count(), 1);
    auto surfaceInterface = surfaceCreatedSpy.first().first().value<SurfaceInterface*>();

    QScopedPointer<Surface> iconSurface(m_compositor->createSurface());
    QVERIFY(iconSurface->isValid());

    QVERIFY(surfaceCreatedSpy.wait());
    QCOMPARE(surfaceCreatedSpy.count(), 2);
    auto iconSurfaceInterface = surfaceCreatedSpy.last().first().value<SurfaceInterface*>();

    // now we have all we need to start a drag operation
    QSignalSpy dragStartedSpy(deviceInterface, SIGNAL(dragStarted()));
    QVERIFY(dragStartedSpy.isValid());

    // first we need to fake the pointer enter
    m_seatInterface->setFocusedPointerSurface(surfaceInterface);
    m_seatInterface->pointerButtonPressed(1);

    QCoreApplication::processEvents();

    dataDevice->startDragInternally(1, surface.data(), iconSurface.data());
    QVERIFY(dragStartedSpy.wait());
    QCOMPARE(dragStartedSpy.count(), 1);
    QVERIFY(!deviceInterface->dragSource());
    QCOMPARE(deviceInterface->origin(), surfaceInterface);
    QCOMPARE(deviceInterface->icon(), iconSurfaceInterface);
}

void TestDataDevice::testSetSelection()
{
    using namespace KWayland::Client;
    using namespace KWayland::Server;
    QScopedPointer<Pointer> pointer(m_seat->createPointer());

    QSignalSpy dataDeviceCreatedSpy(m_dataDeviceManagerInterface, SIGNAL(dataDeviceCreated(KWayland::Server::DataDeviceInterface*)));
    QVERIFY(dataDeviceCreatedSpy.isValid());

    QScopedPointer<DataDevice> dataDevice(m_dataDeviceManager->getDataDevice(m_seat));
    QVERIFY(dataDevice->isValid());

    QVERIFY(dataDeviceCreatedSpy.wait());
    QCOMPARE(dataDeviceCreatedSpy.count(), 1);
    auto deviceInterface = dataDeviceCreatedSpy.first().first().value<DataDeviceInterface*>();
    QVERIFY(deviceInterface);

    QSignalSpy dataSourceCreatedSpy(m_dataDeviceManagerInterface, SIGNAL(dataSourceCreated(KWayland::Server::DataSourceInterface*)));
    QVERIFY(dataDeviceCreatedSpy.isValid());

    QScopedPointer<DataSource> dataSource(m_dataDeviceManager->createDataSource());
    QVERIFY(dataSource->isValid());
    dataSource->offer(QStringLiteral("text/plain"));

    QVERIFY(dataSourceCreatedSpy.wait());
    QCOMPARE(dataSourceCreatedSpy.count(), 1);
    auto sourceInterface = dataSourceCreatedSpy.first().first().value<DataSourceInterface*>();
    QVERIFY(sourceInterface);

    // everything setup, now we can test setting the selection
    QSignalSpy selectionChangedSpy(deviceInterface, SIGNAL(selectionChanged(KWayland::Server::DataSourceInterface*)));
    QVERIFY(selectionChangedSpy.isValid());
    QSignalSpy selectionClearedSpy(deviceInterface, SIGNAL(selectionCleared()));
    QVERIFY(selectionClearedSpy.isValid());

    QVERIFY(!deviceInterface->selection());
    dataDevice->setSelection(1, dataSource.data());
    QVERIFY(selectionChangedSpy.wait());
    QCOMPARE(selectionChangedSpy.count(), 1);
    QCOMPARE(selectionClearedSpy.count(), 0);
    QCOMPARE(selectionChangedSpy.first().first().value<DataSourceInterface*>(), sourceInterface);
    QCOMPARE(deviceInterface->selection(), sourceInterface);

    // send selection to datadevice
    QSignalSpy selectionOfferedSpy(dataDevice.data(), SIGNAL(selectionOffered(KWayland::Client::DataOffer*)));
    QVERIFY(selectionOfferedSpy.isValid());
    deviceInterface->sendSelection(deviceInterface);
    QVERIFY(selectionOfferedSpy.wait());
    QCOMPARE(selectionOfferedSpy.count(), 1);
    auto dataOffer = selectionOfferedSpy.first().first().value<DataOffer*>();
    QVERIFY(dataOffer);
    QCOMPARE(dataOffer->offeredMimeTypes().count(), 1);
    QCOMPARE(dataOffer->offeredMimeTypes().first().name(), QStringLiteral("text/plain"));

    // sending a new mimetype to the selection, should be announced in the offer
    QSignalSpy mimeTypeAddedSpy(dataOffer, SIGNAL(mimeTypeOffered(QString)));
    QVERIFY(mimeTypeAddedSpy.isValid());
    dataSource->offer(QStringLiteral("text/html"));
    QVERIFY(mimeTypeAddedSpy.wait());
    QCOMPARE(mimeTypeAddedSpy.count(), 1);
    QCOMPARE(mimeTypeAddedSpy.first().first().toString(), QStringLiteral("text/html"));
    QCOMPARE(dataOffer->offeredMimeTypes().count(), 2);
    QCOMPARE(dataOffer->offeredMimeTypes().first().name(), QStringLiteral("text/plain"));
    QCOMPARE(dataOffer->offeredMimeTypes().last().name(), QStringLiteral("text/html"));

    // now clear the selection
    dataDevice->clearSelection(1);
    QVERIFY(selectionClearedSpy.wait());
    QCOMPARE(selectionChangedSpy.count(), 1);
    QCOMPARE(selectionClearedSpy.count(), 1);
    QVERIFY(!deviceInterface->selection());
}

void TestDataDevice::testDestroy()
{
    using namespace KWayland::Client;

    QScopedPointer<DataDevice> dataDevice(m_dataDeviceManager->getDataDevice(m_seat));
    QVERIFY(dataDevice->isValid());

    connect(m_connection, &ConnectionThread::connectionDied, m_dataDeviceManager, &DataDeviceManager::destroy);
    connect(m_connection, &ConnectionThread::connectionDied, m_seat, &Seat::destroy);
    connect(m_connection, &ConnectionThread::connectionDied, m_compositor, &Compositor::destroy);
    connect(m_connection, &ConnectionThread::connectionDied, dataDevice.data(), &DataDevice::destroy);
    connect(m_connection, &ConnectionThread::connectionDied, m_queue, &EventQueue::destroy);

    QSignalSpy connectionDiedSpy(m_connection, SIGNAL(connectionDied()));
    QVERIFY(connectionDiedSpy.isValid());
    delete m_display;
    m_display = nullptr;
    QVERIFY(connectionDiedSpy.wait());

    // now the data device should be destroyed;
    QVERIFY(!dataDevice->isValid());

    // calling destroy again should not fail
    dataDevice->destroy();
}

QTEST_GUILESS_MAIN(TestDataDevice)
#include "test_datadevice.moc"