/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.

Copyright (C) 2016 Martin Gräßlin <mgraesslin@kde.org>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "kwin_wayland_test.h"
#include "cursor.h"
#include "effects.h"
#include "platform.h"
#include "shell_client.h"
#include "screens.h"
#include "wayland_server.h"
#include "workspace.h"

#include <KWayland/Client/connection_thread.h>
#include <KWayland/Client/compositor.h>
#include <KWayland/Client/shell.h>
#include <KWayland/Client/surface.h>

#include <KWayland/Server/shell_interface.h>

using namespace KWin;
using namespace KWayland::Client;

static const QString s_socketName = QStringLiteral("wayland_test_kwin_shell_client-0");

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

    void testMapUnmapMap_data();
    void testMapUnmapMap();
    void testDesktopPresenceChanged();
};

void TestShellClient::initTestCase()
{
    qRegisterMetaType<KWin::ShellClient*>();
    qRegisterMetaType<KWin::AbstractClient*>();
    QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
    QVERIFY(workspaceCreatedSpy.isValid());
    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
    QMetaObject::invokeMethod(kwinApp()->platform(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));

    kwinApp()->start();
    QVERIFY(workspaceCreatedSpy.wait());
    QCOMPARE(screens()->count(), 2);
    QCOMPARE(screens()->geometry(0), QRect(0, 0, 1280, 1024));
    QCOMPARE(screens()->geometry(1), QRect(1280, 0, 1280, 1024));
    waylandServer()->initWorkspace();
}

void TestShellClient::init()
{
    QVERIFY(Test::setupWaylandConnection(s_socketName));

    screens()->setCurrent(0);
    KWin::Cursor::setPos(QPoint(1280, 512));
}

void TestShellClient::cleanup()
{
    Test::destroyWaylandConnection();
}

void TestShellClient::testMapUnmapMap_data()
{
    QTest::addColumn<Test::ShellSurfaceType>("type");

    QTest::newRow("wlShell") << Test::ShellSurfaceType::WlShell;
    QTest::newRow("xdgShellV5") << Test::ShellSurfaceType::XdgShellV5;
}

void TestShellClient::testMapUnmapMap()
{
    // this test verifies that mapping a previously mapped window works correctly
    QSignalSpy clientAddedSpy(waylandServer(), &WaylandServer::shellClientAdded);
    QVERIFY(clientAddedSpy.isValid());
    QSignalSpy effectsWindowShownSpy(effects, &EffectsHandler::windowShown);
    QVERIFY(effectsWindowShownSpy.isValid());
    QSignalSpy effectsWindowHiddenSpy(effects, &EffectsHandler::windowHidden);
    QVERIFY(effectsWindowHiddenSpy.isValid());

    QScopedPointer<Surface> surface(Test::createSurface());
    QFETCH(Test::ShellSurfaceType, type);
    QScopedPointer<QObject> shellSurface(Test::createShellSurface(type, surface.data()));

    // now let's render
    Test::render(surface.data(), QSize(100, 50), Qt::blue);

    QVERIFY(clientAddedSpy.isEmpty());
    QVERIFY(clientAddedSpy.wait());
    auto client = clientAddedSpy.first().first().value<ShellClient*>();
    QVERIFY(client);
    QVERIFY(client->isShown(true));
    QCOMPARE(client->isHiddenInternal(), false);
    QCOMPARE(client->readyForPainting(), true);
    QCOMPARE(workspace()->activeClient(), client);
    QVERIFY(effectsWindowShownSpy.isEmpty());

    // now unmap
    QSignalSpy hiddenSpy(client, &ShellClient::windowHidden);
    QVERIFY(hiddenSpy.isValid());
    QSignalSpy windowClosedSpy(client, &ShellClient::windowClosed);
    QVERIFY(windowClosedSpy.isValid());
    surface->attachBuffer(Buffer::Ptr());
    surface->commit(Surface::CommitFlag::None);
    QVERIFY(hiddenSpy.wait());
    QCOMPARE(client->readyForPainting(), true);
    QCOMPARE(client->isHiddenInternal(), true);
    QVERIFY(windowClosedSpy.isEmpty());
    QVERIFY(!workspace()->activeClient());
    QCOMPARE(effectsWindowHiddenSpy.count(), 1);
    QCOMPARE(effectsWindowHiddenSpy.first().first().value<EffectWindow*>(), client->effectWindow());

    QSignalSpy windowShownSpy(client, &ShellClient::windowShown);
    QVERIFY(windowShownSpy.isValid());
    Test::render(surface.data(), QSize(100, 50), Qt::blue);
    QCOMPARE(clientAddedSpy.count(), 1);
    QVERIFY(windowShownSpy.wait());
    QCOMPARE(windowShownSpy.count(), 1);
    QCOMPARE(clientAddedSpy.count(), 1);
    QCOMPARE(client->readyForPainting(), true);
    QCOMPARE(client->isHiddenInternal(), false);
    QCOMPARE(workspace()->activeClient(), client);
    QCOMPARE(effectsWindowShownSpy.count(), 1);
    QCOMPARE(effectsWindowShownSpy.first().first().value<EffectWindow*>(), client->effectWindow());

    // let's unmap again
    surface->attachBuffer(Buffer::Ptr());
    surface->commit(Surface::CommitFlag::None);
    QVERIFY(hiddenSpy.wait());
    QCOMPARE(hiddenSpy.count(), 2);
    QCOMPARE(client->readyForPainting(), true);
    QCOMPARE(client->isHiddenInternal(), true);
    QVERIFY(windowClosedSpy.isEmpty());
    QCOMPARE(effectsWindowHiddenSpy.count(), 2);
    QCOMPARE(effectsWindowHiddenSpy.last().first().value<EffectWindow*>(), client->effectWindow());

    shellSurface.reset();
    surface.reset();
    QVERIFY(windowClosedSpy.wait());
    QCOMPARE(windowClosedSpy.count(), 1);
    QCOMPARE(effectsWindowHiddenSpy.count(), 2);
}

void TestShellClient::testDesktopPresenceChanged()
{
    // this test verifies that the desktop presence changed signals are properly emitted
    QScopedPointer<Surface> surface(Test::createSurface());
    QScopedPointer<ShellSurface> shellSurface(Test::createShellSurface(surface.data()));
    auto c = Test::renderAndWaitForShown(surface.data(), QSize(100, 50), Qt::blue);
    QVERIFY(c);
    QCOMPARE(c->desktop(), 1);
    effects->setNumberOfDesktops(4);
    QSignalSpy desktopPresenceChangedClientSpy(c, &ShellClient::desktopPresenceChanged);
    QVERIFY(desktopPresenceChangedClientSpy.isValid());
    QSignalSpy desktopPresenceChangedWorkspaceSpy(workspace(), &Workspace::desktopPresenceChanged);
    QVERIFY(desktopPresenceChangedWorkspaceSpy.isValid());
    QSignalSpy desktopPresenceChangedEffectsSpy(effects, &EffectsHandler::desktopPresenceChanged);
    QVERIFY(desktopPresenceChangedEffectsSpy.isValid());

    // let's change the desktop
    workspace()->sendClientToDesktop(c, 2, false);
    QCOMPARE(c->desktop(), 2);
    QCOMPARE(desktopPresenceChangedClientSpy.count(), 1);
    QCOMPARE(desktopPresenceChangedWorkspaceSpy.count(), 1);
    // effects is delayed by one cycle
    QCOMPARE(desktopPresenceChangedEffectsSpy.count(), 0);
    QVERIFY(desktopPresenceChangedEffectsSpy.wait());
    QCOMPARE(desktopPresenceChangedEffectsSpy.count(), 1);

    // verify the arguments
    QCOMPARE(desktopPresenceChangedClientSpy.first().at(0).value<AbstractClient*>(), c);
    QCOMPARE(desktopPresenceChangedClientSpy.first().at(1).toInt(), 1);
    QCOMPARE(desktopPresenceChangedWorkspaceSpy.first().at(0).value<AbstractClient*>(), c);
    QCOMPARE(desktopPresenceChangedWorkspaceSpy.first().at(1).toInt(), 1);
    QCOMPARE(desktopPresenceChangedEffectsSpy.first().at(0).value<EffectWindow*>(), c->effectWindow());
    QCOMPARE(desktopPresenceChangedEffectsSpy.first().at(1).toInt(), 1);
    QCOMPARE(desktopPresenceChangedEffectsSpy.first().at(2).toInt(), 2);
}

WAYLANDTEST_MAIN(TestShellClient)
#include "shell_client_test.moc"