/********************************************************************
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 "platform.h"
#include "client.h"
#include "cursor.h"
#include "deleted.h"
#include "screenedge.h"
#include "screens.h"
#include "wayland_server.h"
#include "workspace.h"
#include "shell_client.h"
#include <kwineffects.h>

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

namespace KWin
{

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

class ScreenEdgeClientShowTest : public QObject
{
    Q_OBJECT
private Q_SLOTS:
    void initTestCase();
    void init();
    void testScreenEdgeShowHideX11_data();
    void testScreenEdgeShowHideX11();
};

void ScreenEdgeClientShowTest::initTestCase()
{
    qRegisterMetaType<KWin::ShellClient*>();
    qRegisterMetaType<KWin::AbstractClient*>();
    qRegisterMetaType<KWin::Deleted*>();
    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));
    setenv("QT_QPA_PLATFORM", "wayland", true);
    waylandServer()->initWorkspace();
}

void ScreenEdgeClientShowTest::init()
{
    screens()->setCurrent(0);
    Cursor::setPos(QPoint(640, 512));
    QVERIFY(waylandServer()->clients().isEmpty());
}


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

void ScreenEdgeClientShowTest::testScreenEdgeShowHideX11_data()
{
    QTest::addColumn<QRect>("windowGeometry");
    QTest::addColumn<quint32>("location");
    QTest::addColumn<QPoint>("triggerPos");

    QTest::newRow("bottom/left") << QRect(50, 1004, 1180, 20) << 2u << QPoint(100, 1023);
    QTest::newRow("bottom/right") << QRect(1330, 1004, 1180, 20) << 2u << QPoint(1400, 1023);
    QTest::newRow("top/left") << QRect(50, 0, 1180, 20) << 0u << QPoint(100, 0);
    QTest::newRow("top/right") << QRect(1330, 0, 1180, 20) << 0u << QPoint(1400, 0);
    QTest::newRow("left") << QRect(0, 10, 20, 1000) << 3u << QPoint(0, 50);
    QTest::newRow("right") << QRect(2540, 10, 20, 1000) << 1u << QPoint(2559, 60);
}

void ScreenEdgeClientShowTest::testScreenEdgeShowHideX11()
{
    // this test creates a window which borders the screen and sets the screenedge show hint
    // that should trigger a show of the window whenever the cursor is pushed against the screen edge

    // create the test window
    QScopedPointer<xcb_connection_t, XcbConnectionDeleter> c(xcb_connect(nullptr, nullptr));
    QVERIFY(!xcb_connection_has_error(c.data()));
    // atom for the screenedge show hide functionality
    Xcb::Atom atom(QByteArrayLiteral("_KDE_NET_WM_SCREEN_EDGE_SHOW"), false, c.data());

    xcb_window_t w = xcb_generate_id(c.data());
    QFETCH(QRect, windowGeometry);
    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 info(c.data(), w, rootWindow(), NET::WMAllProperties, NET::WM2AllProperties);
    info.setWindowType(NET::Dock);
    xcb_map_window(c.data(), w);
    xcb_flush(c.data());

    QSignalSpy windowCreatedSpy(workspace(), &Workspace::clientAdded);
    QVERIFY(windowCreatedSpy.isValid());
    QVERIFY(windowCreatedSpy.wait());
    Client *client = windowCreatedSpy.last().first().value<Client*>();
    QVERIFY(client);
    QVERIFY(!client->isDecorated());
    QCOMPARE(client->geometry(), windowGeometry);
    QVERIFY(!client->hasStrut());
    QVERIFY(!client->isHiddenInternal());

    QSignalSpy effectsWindowAdded(effects, &EffectsHandler::windowAdded);
    QVERIFY(effectsWindowAdded.isValid());
    QVERIFY(effectsWindowAdded.wait());

    // now try to hide
    QFETCH(quint32, location);
    xcb_change_property(c.data(), XCB_PROP_MODE_REPLACE, w, atom, XCB_ATOM_CARDINAL, 32, 1, &location);
    xcb_flush(c.data());

    QSignalSpy effectsWindowHiddenSpy(effects, &EffectsHandler::windowHidden);
    QVERIFY(effectsWindowHiddenSpy.isValid());
    QSignalSpy clientHiddenSpy(client, &Client::windowHidden);
    QVERIFY(clientHiddenSpy.isValid());
    QVERIFY(clientHiddenSpy.wait());
    QVERIFY(client->isHiddenInternal());
    QCOMPARE(effectsWindowHiddenSpy.count(), 1);

    // now trigger the edge
    QSignalSpy effectsWindowShownSpy(effects, &EffectsHandler::windowShown);
    QVERIFY(effectsWindowShownSpy.isValid());
    QFETCH(QPoint, triggerPos);
    Cursor::setPos(triggerPos);
    QVERIFY(!client->isHiddenInternal());
    QCOMPARE(effectsWindowShownSpy.count(), 1);

    // destroy window again
    QSignalSpy windowClosedSpy(client, &Client::windowClosed);
    QVERIFY(windowClosedSpy.isValid());
    xcb_unmap_window(c.data(), w);
    xcb_destroy_window(c.data(), w);
    xcb_flush(c.data());
    QVERIFY(windowClosedSpy.wait());
}

}

WAYLANDTEST_MAIN(KWin::ScreenEdgeClientShowTest)
#include "screenedge_client_show_test.moc"