/********************************************************************
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 "composite.h"
#include "effects.h"
#include "effectloader.h"
#include "cursor.h"
#include "platform.h"
#include "scene_qpainter.h"
#include "shell_client.h"
#include "wayland_server.h"
#include "workspace.h"
#include "effect_builtins.h"

#include <KConfigGroup>

#include <netwm.h>
#include <xcb/xcb_icccm.h>

using namespace KWin;
static const QString s_socketName = QStringLiteral("wayland_test_effects_slidingpopups-0");

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

    void testWithOtherEffect_data();
    void testWithOtherEffect();
};

void SlidingPopupsTest::initTestCase()
{
    qRegisterMetaType<KWin::ShellClient*>();
    qRegisterMetaType<KWin::AbstractClient*>();
    qRegisterMetaType<KWin::Effect*>();
    QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
    QVERIFY(workspaceCreatedSpy.isValid());
    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
    QVERIFY(waylandServer()->init(s_socketName.toLocal8Bit()));

    // disable all effects - we don't want to have it interact with the rendering
    auto config = KSharedConfig::openConfig(QString(), KConfig::SimpleConfig);
    KConfigGroup plugins(config, QStringLiteral("Plugins"));
    ScriptedEffectLoader loader;
    const auto builtinNames = BuiltInEffects::availableEffectNames() << loader.listOfKnownEffects();
    for (QString name : builtinNames) {
        plugins.writeEntry(name + QStringLiteral("Enabled"), false);
    }

    config->sync();
    kwinApp()->setConfig(config);
    // TODO: make effects use KWin's config directly
    KSharedConfig::openConfig(QStringLiteral(KWIN_CONFIG), KConfig::NoGlobals)->group("Effect-Wobbly").writeEntry(QStringLiteral("Settings"), QStringLiteral("Custom"));
    KSharedConfig::openConfig(QStringLiteral(KWIN_CONFIG), KConfig::NoGlobals)->group("Effect-Wobbly").writeEntry(QStringLiteral("OpenEffect"), true);
    KSharedConfig::openConfig(QStringLiteral(KWIN_CONFIG), KConfig::NoGlobals)->group("Effect-Wobbly").writeEntry(QStringLiteral("CloseEffect"), true);

    if (QFile::exists(QStringLiteral("/dev/dri/card0"))) {
        qputenv("KWIN_COMPOSE", QByteArrayLiteral("O2"));
    }
    qputenv("KWIN_EFFECTS_FORCE_ANIMATIONS", "1");
    kwinApp()->start();
    QVERIFY(workspaceCreatedSpy.wait());
    QVERIFY(Compositor::self());
}

void SlidingPopupsTest::init()
{
}

void SlidingPopupsTest::cleanup()
{
    EffectsHandlerImpl *e = static_cast<EffectsHandlerImpl*>(effects);
    while (!e->loadedEffects().isEmpty()) {
        const QString effect = e->loadedEffects().first();
        e->unloadEffect(effect);
        QVERIFY(!e->isEffectLoaded(effect));
    }
}

struct XcbConnectionDeleter
{
    static inline void cleanup(xcb_connection_t *pointer)
    {
        xcb_disconnect(pointer);
    }
};


void SlidingPopupsTest::testWithOtherEffect_data()
{
    QTest::addColumn<QStringList>("effectsToLoad");

    QTest::newRow("scale, slide") << QStringList{QStringLiteral("kwin4_effect_scalein"), QStringLiteral("slidingpopups")};
    QTest::newRow("slide, scale") << QStringList{QStringLiteral("slidingpopups"), QStringLiteral("kwin4_effect_scalein")};
    QTest::newRow("fade, slide") << QStringList{QStringLiteral("kwin4_effect_fade"), QStringLiteral("slidingpopups")};
    QTest::newRow("slide, fade") << QStringList{QStringLiteral("slidingpopups"), QStringLiteral("kwin4_effect_fade")};

    if (effects->compositingType() & KWin::OpenGLCompositing) {
        QTest::newRow("glide, slide") << QStringList{QStringLiteral("glide"), QStringLiteral("slidingpopups")};
        QTest::newRow("slide, glide") << QStringList{QStringLiteral("slidingpopups"), QStringLiteral("glide")};
        QTest::newRow("wobblywindows, slide") << QStringList{QStringLiteral("wobblywindows"), QStringLiteral("slidingpopups")};
        QTest::newRow("slide, wobblywindows") << QStringList{QStringLiteral("slidingpopups"), QStringLiteral("wobblywindows")};
        QTest::newRow("fallapart, slide") << QStringList{QStringLiteral("fallapart"), QStringLiteral("slidingpopups")};
        QTest::newRow("slide, fallapart") << QStringList{QStringLiteral("slidingpopups"), QStringLiteral("fallapart")};
    }
}

void SlidingPopupsTest::testWithOtherEffect()
{
    // this test verifies that slidingpopups effect grabs the window added role
    // independently of the sequence how the effects are loaded.
    // see BUG 336866
    EffectsHandlerImpl *e = static_cast<EffectsHandlerImpl*>(effects);
    // find the effectsloader
    auto effectloader = e->findChild<AbstractEffectLoader*>();
    QVERIFY(effectloader);
    QSignalSpy effectLoadedSpy(effectloader, &AbstractEffectLoader::effectLoaded);
    QVERIFY(effectLoadedSpy.isValid());

    Effect *slidingPoupus = nullptr;
    Effect *otherEffect = nullptr;
    QFETCH(QStringList, effectsToLoad);
    for (const QString &effectName : effectsToLoad) {
        QVERIFY(!e->isEffectLoaded(effectName));
        QVERIFY(e->loadEffect(effectName));
        QVERIFY(e->isEffectLoaded(effectName));

        QCOMPARE(effectLoadedSpy.count(), 1);
        Effect *effect = effectLoadedSpy.first().first().value<Effect*>();
        if (effectName == QStringLiteral("slidingpopups")) {
            slidingPoupus = effect;
        } else {
            otherEffect = effect;
        }
        effectLoadedSpy.clear();
    }
    QVERIFY(slidingPoupus);
    QVERIFY(otherEffect);

    QVERIFY(!slidingPoupus->isActive());
    QVERIFY(!otherEffect->isActive());
    QSignalSpy windowAddedSpy(effects, &EffectsHandler::windowAdded);
    QVERIFY(windowAddedSpy.isValid());

    // create an xcb window
    QScopedPointer<xcb_connection_t, XcbConnectionDeleter> c(xcb_connect(nullptr, nullptr));
    QVERIFY(!xcb_connection_has_error(c.data()));
    const QRect windowGeometry(0, 0, 100, 200);
    xcb_window_t w = xcb_generate_id(c.data());
    xcb_create_window(c.data(), XCB_COPY_FROM_PARENT, w, rootWindow(),
                      windowGeometry.x(),
                      windowGeometry.y(),
                      windowGeometry.width(),
                      windowGeometry.height(),
                      0, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCB_COPY_FROM_PARENT, 0, nullptr);
    xcb_size_hints_t hints;
    memset(&hints, 0, sizeof(hints));
    xcb_icccm_size_hints_set_position(&hints, 1, windowGeometry.x(), windowGeometry.y());
    xcb_icccm_size_hints_set_size(&hints, 1, windowGeometry.width(), windowGeometry.height());
    xcb_icccm_set_wm_normal_hints(c.data(), w, &hints);
    NETWinInfo winInfo(c.data(), w, rootWindow(), NET::Properties(), NET::Properties2());
    winInfo.setWindowType(NET::Normal);

    // and get the slide atom
    const QByteArray effectAtomName = QByteArrayLiteral("_KDE_SLIDE");
    xcb_intern_atom_cookie_t atomCookie = xcb_intern_atom_unchecked(c.data(), false, effectAtomName.length(), effectAtomName.constData());
    const int size = 2;
    int32_t data[size];
    data[0] = 0;
    data[1] = 0;
    QScopedPointer<xcb_intern_atom_reply_t, QScopedPointerPodDeleter> atom(xcb_intern_atom_reply(c.data(), atomCookie, nullptr));
    QVERIFY(!atom.isNull());
    xcb_change_property(c.data(), XCB_PROP_MODE_REPLACE, w, atom->atom, atom->atom, 32, size, data);

    xcb_map_window(c.data(), w);
    xcb_flush(c.data());

    // we should get a client for it
    QSignalSpy windowCreatedSpy(workspace(), &Workspace::clientAdded);
    QVERIFY(windowCreatedSpy.isValid());
    QVERIFY(windowCreatedSpy.wait());
    Client *client = windowCreatedSpy.first().first().value<Client*>();
    QVERIFY(client);
    QCOMPARE(client->window(), w);
    QVERIFY(client->isNormalWindow());

    // sliding popups should be active
    QVERIFY(windowAddedSpy.wait());
    QTRY_VERIFY(slidingPoupus->isActive());
    QEXPECT_FAIL("scale, slide", "bug 336866", Continue);
    QEXPECT_FAIL("fade, slide", "bug 336866", Continue);
    QEXPECT_FAIL("wobblywindows, slide", "bug 336866", Continue);
    QEXPECT_FAIL("slide, wobblywindows", "bug 336866", Continue);
    QVERIFY(!otherEffect->isActive());

    // wait till effect ends
    QTRY_VERIFY(!slidingPoupus->isActive());
    QTest::qWait(300);
    QVERIFY(!otherEffect->isActive());

    // and destroy the window again
    xcb_unmap_window(c.data(), w);
    xcb_flush(c.data());

    QSignalSpy windowClosedSpy(client, &Client::windowClosed);
    QVERIFY(windowClosedSpy.isValid());

    QSignalSpy windowDeletedSpy(effects, &EffectsHandler::windowDeleted);
    QVERIFY(windowDeletedSpy.isValid());
    QVERIFY(windowClosedSpy.wait());

    // again we should have the sliding popups active
    QVERIFY(slidingPoupus->isActive());
    QEXPECT_FAIL("wobblywindows, slide", "bug 336866", Continue);
    QEXPECT_FAIL("slide, wobblywindows", "bug 336866", Continue);
    QVERIFY(!otherEffect->isActive());

    QVERIFY(windowDeletedSpy.wait());

    QCOMPARE(windowDeletedSpy.count(), 1);
    QTRY_VERIFY(!slidingPoupus->isActive());
    QTest::qWait(300);
    QVERIFY(!otherEffect->isActive());
    xcb_destroy_window(c.data(), w);
    c.reset();
}

WAYLANDTEST_MAIN(SlidingPopupsTest)
#include "slidingpopups_test.moc"