/*
 * NotificationDaemon.cpp
 *
 * Copyright (C) 2021  Emanoil Kotsev <deloptes@gmail.com>
 *
 *
 *  This file is part of kdbusnotification.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <tqtimer.h>
#include <tqdbusmessage.h>
#include <tqdbuserror.h>

#include "NotificationDaemon.h"

#define NOTIFICATIONS_DBUS_PATH "/org/freedesktop/Notifications"
#define NOTIFICATIONS_DBUS_SRVC "org.freedesktop.Notifications"

#define DBUS_CONNECTION_TIMEOUT 4000
#define DBUS_CONNECTION_RETRY 3

NotificationDaemon::NotificationDaemon() : KUniqueApplication()
{
    // TODO Auto-generated constructor stub
    retryCount=0;
    // init session connection to dbus
    if (!initDBUS()) {
        tqDebug("Failed to initialize the connection to DBus");
        TQTimer::singleShot(DBUS_CONNECTION_TIMEOUT, this, TQT_SLOT(slotReconnect()));
        retryCount++;
    }
}

NotificationDaemon::~NotificationDaemon()
{
    // close D-Bus connection
    close();

    delete notificationNodeService;
    delete freedesktopService;
    delete orgService;
    delete rootService;
}

bool NotificationDaemon::isConnectedToDBUS(){
    return mConnection.isConnected();
}

bool NotificationDaemon::initDBUS(){
    mConnection = TQT_DBusConnection::addConnection(TQT_DBusConnection::SessionBus, NOTIFICATIONS_DBUS_SRVC);

    if ( !mConnection.isConnected() ) {
        tqDebug("Failed to open connection to system message bus: "
                + mConnection.lastError().message());
        return false;
    }

    // try to get a specific service name
    if (!mConnection.requestName(NOTIFICATIONS_DBUS_SRVC, TQT_DBusConnection::NoReplace))
        return false;

    mConnection.scheduleDispatch();
    mConnection.connect(this, TQT_SLOT(slotDbusSignal(const TQT_DBusMessage&)));

    TQTimer::singleShot(10, this, TQT_SLOT(slotConnectionCheck()));

    return true;
}

void NotificationDaemon::close() {
    if(mConnection.isConnected()) {
        mConnection.disconnect(this, TQT_SLOT(slotDbusSignal(const TQT_DBusMessage&)));
        mConnection.closeConnection(NOTIFICATIONS_DBUS_SRVC);
    }
}

void NotificationDaemon::slotReconnect() {

    close();

    if (!initDBUS()) {
        if (DBUS_CONNECTION_RETRY > retryCount) {
            tqFatal("Failed to initialize the connection to DBus");
        }
        TQTimer::singleShot(DBUS_CONNECTION_TIMEOUT, this, TQT_SLOT(slotReconnect()));
        retryCount++;
    }
}

void NotificationDaemon::slotDbusSignal(const TQT_DBusMessage& message) {
    if (message.interface() != TQString("org.freedesktop.DBus"))
        return;
    if (message.member() != TQString("NameAcquired"))
        return;
    tqDebug("Name acquired: " + message[0].toString());
    serviceName = message[0].toString();
}

void NotificationDaemon::slotConnectionCheck() {

    if (serviceName != NOTIFICATIONS_DBUS_SRVC) {
        tqFatal("TDE Notification service already running or no unique name possible.");
    }

    rootService    = new RootNodeService(mConnection);
    orgService     = new OrgNodeService(mConnection);
    freedesktopService   = new FreeDesktopNodeService(mConnection);
    notificationNodeService  = new NotificationsNodeService(mConnection);

    tqDebug("TDE Notification service setup done.");
}

#include "NotificationDaemon.moc"