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#ifndef SENSORFWSENSORBASE_H
#define SENSORFWSENSORBASE_H

#include <QtSensors/qsensorbackend.h>
#include <sensormanagerinterface.h>
#include <abstractsensor_i.h>

#include <QtSensors/QAmbientLightSensor>
#include <QtSensors/QIRProximitySensor>
#include <QtSensors/QTapSensor>
#include <QtSensors/QProximitySensor>

class SensorfwSensorBase : public QSensorBackend
{
    Q_OBJECT
public:
    SensorfwSensorBase(QSensor *sensor);
    virtual ~SensorfwSensorBase();


protected:
    virtual bool doConnect()=0;
    void start() Q_DECL_OVERRIDE;
    void stop() Q_DECL_OVERRIDE;

    static const float GRAVITY_EARTH;
    static const float GRAVITY_EARTH_THOUSANDTH;    //for speed
    static const int KErrNotFound;
    static const int KErrInUse;
    static QStringList m_bufferingSensors;

    void setRanges(qreal correctionFactor=1);
    virtual QString sensorName() const=0;

    template<typename T>
    void initSensor(bool &initDone)
    {

        const QString name = sensorName();

        if (!initDone) {
            if (!m_remoteSensorManager->loadPlugin(name)) {
                sensorError(KErrNotFound);
                return;
            }
            m_remoteSensorManager->registerSensorInterface<T>(name);
        }
        m_sensorInterface = T::controlInterface(name);
        if (!m_sensorInterface) {
            m_sensorInterface = const_cast<T*>(T::listenInterface(name));
        }
        if (!m_sensorInterface) {
            sensorError(KErrNotFound);
            return;
        }
        if (!m_sensorInterface) {
            sensorError(KErrNotFound);
            return;
        }

        initDone = true;

        //metadata
        QList<DataRange> intervals = m_sensorInterface->getAvailableIntervals();

        for (int i = 0, l = intervals.size(); i < l; i++) {
            qreal intervalMax = ((DataRange)(intervals.at(i))).max;
            qreal intervalMin =((DataRange)(intervals.at(i))).min;

            if (intervalMin == 0 && intervalMax == 0) {
                // 0 interval has different meanings in e.g. magge/acce
                // magge -> best-effort
                // acce -> lowest possible
                // in Qt API setting 0 means default
                continue;
            }

            qreal rateMin = intervalMax < 1 ? 1 : 1 / intervalMax * 1000;
            rateMin = rateMin < 1 ? 1 : rateMin;

            intervalMin = intervalMin < 1 ? 10: intervalMin;     // do not divide with 0
            qreal rateMax = 1 / intervalMin * 1000;
            addDataRate(rateMin, rateMax);
        }

        //bufferSizes
        if (m_bufferingSensors.contains(sensor()->identifier())) {

            IntegerRangeList sizes = m_sensorInterface->getAvailableBufferSizes();
            int l = sizes.size();
            for (int i = 0; i < l; i++) {
                int second = sizes.at(i).second;
                m_maxBufferSize = second > m_bufferSize ? second : m_maxBufferSize;
            }
            m_maxBufferSize = m_maxBufferSize < 0 ? 1 : m_maxBufferSize;
            //SensorFW guarantees to provide the most efficient size first
            //TODO: remove from comments
            //m_efficientBufferSize  = m_sensorInterface->hwBuffering()? (l>0?sizes.at(0).first:1) : 1;
        }
        else
            m_maxBufferSize = 1;

        sensor()->setMaxBufferSize(m_maxBufferSize);
        sensor()->setEfficientBufferSize(m_efficientBufferSize);

        QByteArray type = sensor()->type();
        if (type == QAmbientLightSensor::type) return;   // SensorFW returns lux values, plugin enumerated values
        if (type == QIRProximitySensor::type) return;    // SensorFW returns raw reflectance values, plugin % of max reflectance
        if (name == "accelerometersensor") return;      // SensorFW returns milliGs, plugin m/s^2
        if (name == "magnetometersensor") return;       // SensorFW returns nanoTeslas, plugin Teslas
        if (name == "gyroscopesensor") return;          // SensorFW returns DSPs, plugin milliDSPs

        setDescription(m_sensorInterface->description());

        if (name == "tapsensor") return;
        setRanges();
    };


    AbstractSensorChannelInterface* m_sensorInterface;
    int m_bufferSize;
    int bufferSize() const;
    virtual qreal correctionFactor() const;

private:

    static SensorManagerInterface* m_remoteSensorManager;
    int m_prevOutputRange;
    bool doConnectAfterCheck();
    int m_efficientBufferSize, m_maxBufferSize;

    QDBusServiceWatcher *watcher;
    bool m_available;
    bool running;
private slots:
    void connectToSensord();
    void sensordUnregistered();
};

#endif
