/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the Qt Mobility Components.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include "dbuscomm_maemo_p.h"

#include <iostream>

using namespace std;

QTM_BEGIN_NAMESPACE

const QString DBusComm::positioningdService   = QString("com.nokia.positioningd.client");

const QString DBusComm::positioningdPath      = QString("/com/nokia/positioningd/client");

const QString DBusComm::positioningdInterface = QString("com.nokia.positioningd.client");

DBusComm::DBusComm(QObject *parent) : QObject(parent), 

                                      minimumUpdateInterval(1000), 

                                      availablePositioningMethods(QGeoPositionInfoSource::AllPositioningMethods)

{

}

int DBusComm::init()

{

    if (!QDBusConnection::sessionBus().isConnected()) {

        cerr << "Cannot connect to the D-BUS session bus.\n";

        return -1;

    }

    // Application auto-start by dbus may take a while, so try

    // connecting a few times.

    int cnt = 6; 

    do {

        // cout << "Connecting to positioning daemon..." << endl;

        positioningdProxy = new QDBusInterface(positioningdService,

                                               positioningdPath,

                                               positioningdInterface,

                                               QDBusConnection::sessionBus());

        usleep(500000);

        cnt--;

    } while (cnt && (positioningdProxy->isValid() == false));

    if (positioningdProxy->isValid() == false) {

        cerr << "DBus connection to positioning daemon failed.\n";

        return -1;

    }

    serviceDisconnectWatcher = new QDBusServiceWatcher (positioningdService, QDBusConnection::sessionBus(), 

                                                        QDBusServiceWatcher::WatchForUnregistration, this);

    QObject::connect(serviceDisconnectWatcher, SIGNAL(serviceUnregistered ( const QString &)),

                     this,SLOT(onServiceDisconnect(const QString &)));

    serviceConnectWatcher = new QDBusServiceWatcher (positioningdService, QDBusConnection::sessionBus(), 

                                                     QDBusServiceWatcher::WatchForRegistration, this);

    QObject::connect(serviceConnectWatcher, SIGNAL(serviceRegistered ( const QString &)),

                     this,SLOT(onServiceConnect(const QString &)));

    if (createUniqueName() == false) { // set myService, myPath 

        return -1;

    }

    dbusServer = new DBusServer(&serverObj, this);

    QDBusConnection::sessionBus().registerObject(myPath, &serverObj);

    if (!QDBusConnection::sessionBus().registerService(myService)) {

        cerr << qPrintable(QDBusConnection::sessionBus().lastError().message()) << endl;

        return -1;

    }

    sendDBusRegister();

    return 0;

}

void DBusComm::onServiceDisconnect(const QString &name)

{

    Q_UNUSED(name);

    emit serviceDisconnected();

}

void DBusComm::onServiceConnect(const QString &name)

{

    Q_UNUSED(name);

    sendDBusRegister();

    emit serviceConnected();

}

void DBusComm::receivePositionUpdate(const QGeoPositionInfo &update)

{

    emit receivedPositionUpdate(update);

}

void DBusComm::receiveSatellitesInView(const QList<QGeoSatelliteInfo> &info)

{

    emit receivedSatellitesInView(info);

}

void DBusComm::receiveSatellitesInUse(const QList<QGeoSatelliteInfo> &info)

{

    emit receivedSatellitesInUse(info);

}

void DBusComm::receiveSettings(QGeoPositionInfoSource::PositioningMethod methods, qint32 interval)

{

    availablePositioningMethods = methods;

    minimumUpdateInterval = interval;

}

bool DBusComm::sendDBusRegister()

{

    QDBusMessage reply = positioningdProxy->call("registerListener",

                                                 myService.toAscii().constData(),

                                                 myPath.toAscii().constData());

    if (reply.type() == QDBusMessage::ReplyMessage) {

        QList<QVariant> values = reply.arguments();

        clientId = values.takeFirst().toInt();

        quint32 m = values.takeFirst().toUInt();

        availablePositioningMethods = (QGeoPositionInfoSource::PositioningMethod) m;

        minimumUpdateInterval = values.takeFirst().toUInt();

        cout << "Register client ID: " << clientId << endl;

        cout << "Methods available: " << hex << availablePositioningMethods << dec;

        cout  << " minInterval: " << minimumUpdateInterval << "\n"; 

    } else {

        cerr << endl << "DBus error:\n";

        cerr << reply.errorName().toAscii().constData() << endl;

        cerr << reply.errorMessage().toAscii().constData() << endl;

        return false;

    }

    return true;

}

QGeoPositionInfoSource::PositioningMethods DBusComm::availableMethods() const

{

    return availablePositioningMethods;

}

int DBusComm::minimumInterval() const

{

    return minimumUpdateInterval;

}

bool DBusComm::sendConfigRequest(Command command, QGeoPositionInfoSource::PositioningMethods method,

                                 int interval) const

{

    QDBusReply<int> reply; 

    reply = positioningdProxy->call("configSession", clientId, command, int(method), interval);

    //cout << "sessionConfigRequest cmd: cmd:" << command << " method: ";

    //cout << method << " interval: " << interval << "\n";

    if (reply.isValid()) {

        int n = reply.value();

        cout << "sessionConfigRequest:Reply: " << n << endl;

    } else {

        cerr << endl << "DBus error:\n";

        cerr << reply.error().name().toAscii().constData() << endl;

        cerr << reply.error().message().toAscii().constData() << endl;

        return false;

    }

    return true;

}

QGeoPositionInfo& DBusComm::requestLastKnownPosition(bool satelliteMethodOnly)

{

    QDBusReply<QByteArray> reply; 

    reply = positioningdProxy->call("latestPosition", satelliteMethodOnly);

    static QGeoPositionInfo update;

    if (reply.isValid()) {

        // cout << "requestLastKnownPosition(): received update\n";

        QByteArray message = reply.value();

        QDataStream stream(message);

        stream >> update;

    } else {

        cerr << endl << "DBus error:\n";

        cerr << reply.error().name().toAscii().constData() << endl;

        cerr << reply.error().message().toAscii().constData() << endl;

        update = QGeoPositionInfo();

    }

    return update;

} 

bool DBusComm::createUniqueName()

{

    QFile uuidfile("/proc/sys/kernel/random/uuid");

    if (!uuidfile.open(QIODevice::ReadOnly)) {

        cerr << "UUID file failed.";

        return false;

    }

    QTextStream in(&uuidfile);

    QString uuid = 'I' + in.readLine();

    uuid.replace('-', 'I');

    myService   = "com.nokia.qlocation." + uuid;

    myPath      = "/com/nokia/qlocation/" + uuid;

    return true;

}

#include "moc_dbuscomm_maemo_p.cpp"

QTM_END_NAMESPACE