/********************************************************************
Copyright 2020 Aleix Pol Gonzalez <aleixpol@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 <QHash>
#include <QThread>
#include <QtTest>
// WaylandServer
#include "../../src/server/compositor_interface.h"
#include "../../src/server/display.h"
#include "../../src/server/seat_interface.h"
#include "../../src/server/inputmethod_v1_interface.h"

#include "KWayland/Client/compositor.h"
#include "KWayland/Client/connection_thread.h"
#include "KWayland/Client/event_queue.h"
#include "KWayland/Client/registry.h"
#include "KWayland/Client/seat.h"
#include "KWayland/Client/surface.h"
#include "KWayland/Client/output.h"

#include "qwayland-input-method-unstable-v1.h"

using namespace KWaylandServer;


class InputPanelSurface : public QObject, public QtWayland::zwp_input_panel_surface_v1
{
    Q_OBJECT
public:
    InputPanelSurface(::zwp_input_panel_surface_v1 *t)
        : QtWayland::zwp_input_panel_surface_v1(t)
    {
    }
};

class InputPanel : public QtWayland::zwp_input_panel_v1
{
public:
    InputPanel(struct ::wl_registry *registry, int id, int version)
        : QtWayland::zwp_input_panel_v1(registry, id, version)
    {
    }

    InputPanelSurface* panelForSurface(KWayland::Client::Surface* surface) {
        auto panelSurface = new InputPanelSurface(get_input_panel_surface(*surface));
        QObject::connect(surface, &QObject::destroyed, panelSurface, &QObject::deleteLater);
        return panelSurface;
    }
};

class TestInputMethodInterface : public QObject
{
    Q_OBJECT
public:
    TestInputMethodInterface()
    {
    }
    ~TestInputMethodInterface() override;

private Q_SLOTS:
    void initTestCase();
    void testAdd();

private:
    KWayland::Client::ConnectionThread *m_connection;
    KWayland::Client::EventQueue *m_queue;
    KWayland::Client::Compositor *m_clientCompositor;
    KWayland::Client::Seat *m_clientSeat = nullptr;
    KWayland::Client::Output *m_output= nullptr;

    InputPanel* m_inputPanel;
    QThread *m_thread;
    Display m_display;
    SeatInterface *m_seat;
    CompositorInterface *m_serverCompositor;

    KWaylandServer::InputMethodV1Interface* m_inputMethodIface;
    KWaylandServer::InputPanelV1Interface* m_inputPanelIface;

    QVector<SurfaceInterface *> m_surfaces;
};

static const QString s_socketName = QStringLiteral("kwin-wayland-server-inputmethod-test-0");

void TestInputMethodInterface::initTestCase()
{
    m_display.setSocketName(s_socketName);
    m_display.start();
    QVERIFY(m_display.isRunning());

    m_seat = m_display.createSeat(this);
    m_seat->create();
    m_serverCompositor = m_display.createCompositor(this);
    m_inputMethodIface = m_display.createInputMethodInterface(this);
    m_inputPanelIface = m_display.createInputPanelInterface(this);
    auto outputIface = m_display.createOutput(this);
    outputIface->create();

    connect(m_serverCompositor, &CompositorInterface::surfaceCreated, this, [this](SurfaceInterface *surface) {
        m_surfaces += surface;
    });

    // setup connection
    m_connection = new KWayland::Client::ConnectionThread;
    QSignalSpy connectedSpy(m_connection, &KWayland::Client::ConnectionThread::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());
    QVERIFY(!m_connection->connections().isEmpty());

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

    auto registry = new KWayland::Client::Registry(this);
    QSignalSpy interfacesSpy(registry, &KWayland::Client::Registry::interfacesAnnounced);
    connect(registry, &KWayland::Client::Registry::outputAnnounced, this, [this, registry] (quint32 name, quint32 version) {
        m_output = new KWayland::Client::Output(this);
        m_output->setup(registry->bindOutput(name, version));
    });
    connect(registry, &KWayland::Client::Registry::interfaceAnnounced, this, [this, registry](const QByteArray &interface, quint32 name, quint32 version) {
        if (interface == "zwp_input_panel_v1") {
            m_inputPanel = new InputPanel(registry->registry(), name, version);
        }
    });
    connect(registry, &KWayland::Client::Registry::seatAnnounced, this, [this, registry](quint32 name, quint32 version) {
        m_clientSeat = registry->createSeat(name, version);
    });
    registry->setEventQueue(m_queue);
    QSignalSpy compositorSpy(registry, &KWayland::Client::Registry::compositorAnnounced);
    registry->create(m_connection->display());
    QVERIFY(registry->isValid());
    registry->setup();
    wl_display_flush(m_connection->display());

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

    QVERIFY(interfacesSpy.count() || interfacesSpy.wait());

    QSignalSpy surfaceSpy(m_serverCompositor, &CompositorInterface::surfaceCreated);
    for (int i = 0; i < 3; ++i) {
        m_clientCompositor->createSurface(this);
    }
    QVERIFY(surfaceSpy.count() < 3 && surfaceSpy.wait(200));
    QVERIFY(m_surfaces.count() == 3);
    QVERIFY(m_inputPanel);
    QVERIFY(m_output);
}

TestInputMethodInterface::~TestInputMethodInterface()
{
    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_inputPanel;
    delete m_inputMethodIface;
    delete m_inputPanelIface;
    m_connection->deleteLater();
    m_connection = nullptr;
}

void TestInputMethodInterface::testAdd()
{
    QSignalSpy panelSpy(m_inputPanelIface, &InputPanelV1Interface::inputPanelSurfaceAdded);
    QPointer<InputPanelSurfaceV1Interface> panelSurfaceIface;
    connect(m_inputPanelIface, &InputPanelV1Interface::inputPanelSurfaceAdded, this, [&panelSurfaceIface] (InputPanelSurfaceV1Interface *surface) {
        panelSurfaceIface = surface;
    });

    auto surface = m_clientCompositor->createSurface(this);
    auto panelSurface = m_inputPanel->panelForSurface(surface);

    QVERIFY(panelSpy.wait() || panelSurfaceIface);
    Q_ASSERT(panelSurfaceIface);
    Q_ASSERT(panelSurfaceIface->surface() == m_surfaces.constLast());

    QSignalSpy panelTopLevelSpy(panelSurfaceIface, &InputPanelSurfaceV1Interface::topLevel);
    panelSurface->set_toplevel(*m_output, InputPanelSurface::position_center_bottom);
    QVERIFY(panelTopLevelSpy.wait());
}


QTEST_GUILESS_MAIN(TestInputMethodInterface)
#include "test_inputmethod_interface.moc"