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#include "liblocationwrapper_p.h"

#include <QDateTime>

using namespace std;

QTM_BEGIN_NAMESPACE

Q_GLOBAL_STATIC(LiblocationWrapper, LocationEngine)

LiblocationWrapper *LiblocationWrapper::instance()

{

    return LocationEngine();

}

LiblocationWrapper::~LiblocationWrapper() 

{

    if (locationDevice)

        g_object_unref(locationDevice);

    if (locationControl)

        g_object_unref(locationControl);

}

bool LiblocationWrapper::inited()

{

    int retval = false;

    if (!(locationState & LiblocationWrapper::Inited)) {

        g_type_init();

        locationControl = location_gpsd_control_get_default();

        if (locationControl) {

            g_object_set(G_OBJECT(locationControl),

                         "preferred-method", LOCATION_METHOD_USER_SELECTED,

                         "preferred-interval", LOCATION_INTERVAL_1S,

                         NULL);

            locationDevice = 

                    (LocationGPSDevice*)g_object_new(LOCATION_TYPE_GPS_DEVICE, 

                                                     NULL);

            if (locationDevice) {

                errorHandlerId =

                    g_signal_connect(G_OBJECT(locationControl), "error-verbose",

                                     G_CALLBACK(&locationError), 

                                     static_cast<void*>(this));

                posChangedId =

                    g_signal_connect(G_OBJECT(locationDevice), "changed",

                                     G_CALLBACK(&locationChanged), 

                                     static_cast<void*>(this));

                locationState = LiblocationWrapper::Inited;

                retval = true;

                startcounter = 0;

            }

        }

    } else {

        retval = true;

    }

    return retval;

}

void LiblocationWrapper::locationError(LocationGPSDevice *device,

                                       gint errorCode, gpointer data)

{

    Q_UNUSED(device);

    QString locationError;

    switch (errorCode) {

    case LOCATION_ERROR_USER_REJECTED_DIALOG:

        locationError = "User didn't enable requested methods";

        break;

    case LOCATION_ERROR_USER_REJECTED_SETTINGS:

        locationError = "User changed settings, which disabled location.";

        break;

    case LOCATION_ERROR_BT_GPS_NOT_AVAILABLE:

        locationError = "Problems with BT GPS";

        break;

    case LOCATION_ERROR_METHOD_NOT_ALLOWED_IN_OFFLINE_MODE:

        locationError = "Requested method is not allowed in offline mode";

        break;

    case LOCATION_ERROR_SYSTEM:

        locationError = "System error.";

        break;

    default:

        locationError = "Unknown error.";

    }

    qDebug() << "Location error:" << locationError;

    LiblocationWrapper *object;

    object = (LiblocationWrapper *)data;

    emit object->error();

}

void LiblocationWrapper::locationChanged(LocationGPSDevice *device,

                                                 gpointer data)

{

    QGeoPositionInfo posInfo;

    QGeoCoordinate coordinate;

    QGeoSatelliteInfo satInfo;

    int satellitesInUseCount = 0;

    LiblocationWrapper *object;

    if (!data || !device) {

        return;

    }

    object = (LiblocationWrapper *)data;

    if (device) {

        if (device->fix) {

            if (device->fix->fields & LOCATION_GPS_DEVICE_TIME_SET) {

                posInfo.setTimestamp(QDateTime::fromTime_t(device->fix->time));

            }

            if (device->fix->fields & LOCATION_GPS_DEVICE_LATLONG_SET) {

                coordinate.setLatitude(device->fix->latitude);

                coordinate.setLongitude(device->fix->longitude);

                posInfo.setAttribute(QGeoPositionInfo::HorizontalAccuracy,

                                     device->fix->eph / 100.0);

                posInfo.setAttribute(QGeoPositionInfo::VerticalAccuracy,

                                     device->fix->epv);

            }

            if (device->fix->fields & LOCATION_GPS_DEVICE_ALTITUDE_SET) {

                coordinate.setAltitude(device->fix->altitude);

            }

            if (device->fix->fields & LOCATION_GPS_DEVICE_SPEED_SET) {

                posInfo.setAttribute(QGeoPositionInfo::GroundSpeed,

                                     device->fix->speed / 3.6);

            }

            if (device->fix->fields & LOCATION_GPS_DEVICE_CLIMB_SET) {

                posInfo.setAttribute(QGeoPositionInfo::VerticalSpeed,

                                     device->fix->climb);

            }

            if (device->fix->fields & LOCATION_GPS_DEVICE_TRACK_SET) {

                posInfo.setAttribute(QGeoPositionInfo::Direction,

                                     device->fix->track);

            }

        }

        if (device->satellites_in_view) {

            QList<QGeoSatelliteInfo> satsInView;

            QList<QGeoSatelliteInfo> satsInUse;

            unsigned int i;

            for (i=0;i<device->satellites->len;i++) {

                LocationGPSDeviceSatellite *satData =

                    (LocationGPSDeviceSatellite *)g_ptr_array_index(device->satellites,

                                                                    i);

                satInfo.setSignalStrength(satData->signal_strength);

                satInfo.setPrnNumber(satData->prn);

                satInfo.setAttribute(QGeoSatelliteInfo::Elevation, 

                                     satData->elevation);

                satInfo.setAttribute(QGeoSatelliteInfo::Azimuth, 

                                     satData->azimuth);

                satsInView.append(satInfo);

                if (satData->in_use) {

                    satellitesInUseCount++;

                    satsInUse.append(satInfo);

                }

            }

            if (!satsInView.isEmpty())

                object->satellitesInViewUpdated(satsInView);

            if (!satsInUse.isEmpty())

                object->satellitesInUseUpdated(satsInUse);

        }        

    }

    posInfo.setCoordinate(coordinate);

    emit object->positionUpdated(posInfo);

}

QGeoPositionInfo LiblocationWrapper::lastKnownPosition(bool fromSatellitePositioningMethodsOnly) const

{

    QGeoPositionInfo posInfo;

    QGeoCoordinate coordinate;

    double time;

    double latitude;

    double longitude;

    double altitude;

    double speed;

    double track;

    double climb;

    GConfItem lastKnownPositionTime("/system/nokia/location/lastknown/time");

    GConfItem lastKnownPositionLatitude("/system/nokia/location/lastknown/latitude");

    GConfItem lastKnownPositionLongitude("/system/nokia/location/lastknown/longitude");

    GConfItem lastKnownPositionAltitude("/system/nokia/location/lastknown/altitude");

    GConfItem lastKnownPositionSpeed("/system/nokia/location/lastknown/speed");

    GConfItem lastKnownPositionTrack("/system/nokia/location/lastknown/track");

    GConfItem lastKnownPositionClimb("/system/nokia/location/lastknown/climb");

    if (validLastSatUpdate)

        return lastSatUpdate;

    if (!fromSatellitePositioningMethodsOnly)

        if (validLastUpdate)

            return lastUpdate;

    time = lastKnownPositionTime.value().toDouble();

    latitude = lastKnownPositionLatitude.value().toDouble();

    longitude = lastKnownPositionLongitude.value().toDouble();

    altitude = lastKnownPositionAltitude.value().toDouble();

    speed = lastKnownPositionSpeed.value().toDouble();

    track = lastKnownPositionTrack.value().toDouble();

    climb = lastKnownPositionClimb.value().toDouble();

    if (longitude && latitude) {

        coordinate.setLongitude(longitude);

        coordinate.setLatitude(latitude);

        if (altitude) {

            coordinate.setAltitude(altitude);

        }

        posInfo.setCoordinate(coordinate);

    }

    if (speed) {

        posInfo.setAttribute(QGeoPositionInfo::GroundSpeed, speed);

    }

    if (track) {

        posInfo.setAttribute(QGeoPositionInfo::Direction, track);

    }

    if (climb) {

        posInfo.setAttribute(QGeoPositionInfo::VerticalSpeed, climb);        

    }

    // Only positions with time (3D) are provided.

    if (time) {

        posInfo.setTimestamp(QDateTime::fromTime_t(time));

        return posInfo;

    }

    return QGeoPositionInfo();

}

void LiblocationWrapper::satellitesInViewUpdated(const QList<QGeoSatelliteInfo> &satellites)

{

    satsInView = satellites;

}

void LiblocationWrapper::satellitesInUseUpdated(const QList<QGeoSatelliteInfo> &satellites)

{

    satsInUse = satellites;

}

QList<QGeoSatelliteInfo> LiblocationWrapper::satellitesInView()

{

    return satsInView;

}

QList<QGeoSatelliteInfo> LiblocationWrapper::satellitesInUse()

{

    return satsInUse;

}

void LiblocationWrapper::start() {

    startcounter++;

    if ((locationState & LiblocationWrapper::Inited) &&

        !(locationState & LiblocationWrapper::Started)) {

        if (!errorHandlerId) {

            errorHandlerId =

                g_signal_connect(G_OBJECT(locationControl), "error-verbose",

                                 G_CALLBACK(&locationError), 

                                 static_cast<void*>(this));

        }

        if (!posChangedId) {

            posChangedId =

                g_signal_connect(G_OBJECT(locationDevice), "changed",

                                 G_CALLBACK(&locationChanged), 

                                 static_cast<void*>(this));

        }

        location_gpsd_control_start(locationControl);

        locationState |= LiblocationWrapper::Started;

        locationState &= ~LiblocationWrapper::Stopped;

    }

}

void LiblocationWrapper::stop() {

    startcounter--;

    if (startcounter > 0)

        return;

    if ((locationState & (LiblocationWrapper::Started |

                          LiblocationWrapper::Inited)) &&

        !(locationState & LiblocationWrapper::Stopped)) {

        if (errorHandlerId)

            g_signal_handler_disconnect(G_OBJECT(locationControl), 

                                        errorHandlerId);

        if (posChangedId)

            g_signal_handler_disconnect(G_OBJECT(locationDevice), 

                                        posChangedId);

        errorHandlerId = 0;

        posChangedId = 0;

        startcounter = 0;

        location_gpsd_control_stop(locationControl);

        locationState &= ~LiblocationWrapper::Started;

        locationState |= LiblocationWrapper::Stopped;

    }

}

bool LiblocationWrapper::isActive() {

    if (locationState & LiblocationWrapper::Started)

        return true;

    else

        return false;

}

#include "moc_liblocationwrapper_p.cpp"

QTM_END_NAMESPACE