/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Virtual Keyboard module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QDBusConnection>
#include <QtVirtualKeyboard>
#include <QObject>
#include <QtDBus/QtDBus>
#include <X11/Xutil.h>

#include <atspi/atspi.h>
#include <dbus/dbus.h>

#include "handlekeyevents.h"
#include "handleatspievents.h"
#include "handledbusforchrome.h"
#include "common_defs.h"

#ifdef QT_TESTING_RUN
    #include "handlelanguagechange.h"
#endif

int main(int argc, char *argv[])
{
    qputenv("QT_IM_MODULE", QByteArray("qtvirtualkeyboard"));

    bool error = false;
    QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

    QGuiApplication app(argc, argv);

    /** Setup DBus starts */
    auto *extensionHandler = new HandleDbusForChrome(&app);
    if (!QDBusConnection::sessionBus().isConnected()) {
        qWarning() << "Cannot connect to the D-Bus session bus.\n"
                 << "To start it, run:\n"
                 << "\teval `dbus-launch --auto-syntax`\n";
    }

    QDBusConnection::sessionBus().registerObject("/", &app);
    if (!QDBusConnection::sessionBus().registerService(SERVICE_NAME))
    {
        qWarning() << "Failed to register D-Bus service x11vkb.chromium.dbus.service: " << qPrintable(QDBusConnection::sessionBus().lastError().message());
    }
    /** Setup DBus ends */

    QQmlApplicationEngine engine(QStringLiteral("qrc:/main.qml"));
    engine.load(QStringLiteral("qrc:/keyboard.qml"));

    QQmlContext* ctx = engine.rootContext();

    /** Only for testing purpose*/
    #ifdef QT_TESTING_RUN
        ctx->setContextProperty("QT_TESTING_RUN", QVariant(true));
    #endif

    HandleKeyEvents handleKeyEvents;
    if (!handleKeyEvents.init()) {
        qWarning() << "Creation of xdo_t instance failed";
        error = true;
    }
    app.installEventFilter(&handleKeyEvents);
    ctx->setContextProperty("receiver", &handleKeyEvents);

    HandleATSPIEvents handleATSPIEvents;
    if (!handleATSPIEvents.init()) {
        error = true;
    }
    ctx->setContextProperty("atspiFocus", &handleATSPIEvents);

    QObject *switchObject = engine.rootObjects().first();
    QObject *keyboardObject = engine.rootObjects().last();
    QScreen *screen = app.primaryScreen();
    QRect screenRect = screen->geometry();
    int x1 = 0;
    int y1 = 0;
    int x2 = 0;
    int y2 = 0;
    screenRect.getCoords(&x1, &y1, &x2, &y2);

    switchObject->setProperty("x", x2 - switchObject->property("width").toInt());
    switchObject->setProperty("y", y2 - switchObject->property("height").toInt());
    keyboardObject->setProperty("x", x2 - static_cast<int>(screen->size().rwidth()/keyboardObject->property("scaleFactor").toFloat()));
    keyboardObject->setProperty("y", y2 - switchObject->property("height").toInt());

    QObject::connect(extensionHandler, &HandleDbusForChrome::showKeyboard, &handleATSPIEvents, &HandleATSPIEvents::setKeyboardVisible);

    /** Only for testing purpose*/
    #ifdef QT_TESTING_RUN
        HandleLanguageChange hj;
        QObject::connect(engine.rootObjects().last(), SIGNAL(languageChangedSignal(QString)),
                         &hj, SLOT(languageChanged(QString)));
    #endif

    /** If error(s) exit */
    if (!error) {
        return app.exec();
    } else {
        return 1;
    }
}