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#ifndef QLOWENERGYCONTROLLERPRIVATE_P_H
#define QLOWENERGYCONTROLLERPRIVATE_P_H

#include <qglobal.h>
#include <QtCore/QQueue>
#include <QtBluetooth/qbluetooth.h>
#include "qlowenergycontroller.h"
#include "qlowenergyserviceprivate_p.h"

#if defined(QT_BLUEZ_BLUETOOTH) && !defined(QT_BLUEZ_NO_BTLE)
#include <QtBluetooth/QBluetoothSocket>
#endif

QT_BEGIN_NAMESPACE

#if defined(QT_BLUEZ_BLUETOOTH) && !defined(QT_BLUEZ_NO_BTLE)
class HciManager;
#endif

typedef QMap<QBluetoothUuid, QSharedPointer<QLowEnergyServicePrivate> > ServiceDataMap;

class QLowEnergyControllerPrivate : public QObject
{
    Q_OBJECT
    Q_DECLARE_PUBLIC(QLowEnergyController)
public:
    QLowEnergyControllerPrivate();
    ~QLowEnergyControllerPrivate();

    void setError(QLowEnergyController::Error newError);
    bool isValidLocalAdapter();

    void setState(QLowEnergyController::ControllerState newState);

    void connectToDevice();
    void disconnectFromDevice();

    void discoverServices();
    void invalidateServices();

    void discoverServiceDetails(const QBluetoothUuid &service);

    // misc helpers
    QSharedPointer<QLowEnergyServicePrivate> serviceForHandle(
            QLowEnergyHandle handle);
    QLowEnergyCharacteristic characteristicForHandle(
            QLowEnergyHandle handle);
    QLowEnergyDescriptor descriptorForHandle(
            QLowEnergyHandle handle);

    quint16 updateValueOfCharacteristic(QLowEnergyHandle charHandle,
                                     const QByteArray &value,
                                     bool appendValue);
    quint16 updateValueOfDescriptor(QLowEnergyHandle charHandle,
                                 QLowEnergyHandle descriptorHandle,
                                 const QByteArray &value,
                                 bool appendValue);


    // write data
    void writeCharacteristic(const QSharedPointer<QLowEnergyServicePrivate> service,
                             const QLowEnergyHandle charHandle,
                             const QByteArray &newValue, bool writeWithResponse = true);
    void writeDescriptor(const QSharedPointer<QLowEnergyServicePrivate> service,
                         const QLowEnergyHandle charHandle,
                         const QLowEnergyHandle descriptorHandle,
                         const QByteArray &newValue);


    QBluetoothAddress remoteDevice;
    QBluetoothAddress localAdapter;

    QLowEnergyController::ControllerState state;
    QLowEnergyController::Error error;
    QString errorString;

    // list of all found service uuids
    ServiceDataMap serviceList;

    QLowEnergyController::RemoteAddressType addressType;

private:
#if defined(QT_BLUEZ_BLUETOOTH) && !defined(QT_BLUEZ_NO_BTLE)
    QBluetoothSocket *l2cpSocket;
    struct Request {
        quint8 command;
        QByteArray payload;
        // TODO reference below is ugly but until we know all commands and their
        // requirements this is WIP
        QVariant reference;
        QVariant reference2;
    };
    QQueue<Request> openRequests;
    bool requestPending;
    quint16 mtuSize;
    int securityLevelValue;
    bool encryptionChangePending;

    HciManager *hciManager;

    void sendCommand(const QByteArray &packet);
    void sendNextPendingRequest();
    void processReply(const Request &request, const QByteArray &reply);

    void sendReadByGroupRequest(QLowEnergyHandle start, QLowEnergyHandle end,
                                quint16 type);
    void sendReadByTypeRequest(QSharedPointer<QLowEnergyServicePrivate> serviceData,
                               QLowEnergyHandle nextHandle, quint16 attributeType);
    void sendReadValueRequest(QLowEnergyHandle attributeHandle, bool isDescriptor);
    void readServiceValues(const QBluetoothUuid &service,
                           bool readCharacteristics);
    void readServiceValuesByOffset(quint16 handleData, quint16 offset,
                                   bool isLastValue);

    void discoverServiceDescriptors(const QBluetoothUuid &serviceUuid);
    void discoverNextDescriptor(QSharedPointer<QLowEnergyServicePrivate> serviceData,
                                const QList<QLowEnergyHandle> pendingCharHandles,
                                QLowEnergyHandle startingHandle);
    void processUnsolicitedReply(const QByteArray &msg);
    void exchangeMTU();
    bool setSecurityLevel(int level);
    int securityLevel() const;
    void sendExecuteWriteRequest(const QLowEnergyHandle attrHandle,
                                 const QByteArray &newValue,
                                 bool isCancelation);
    void sendNextPrepareWriteRequest(const QLowEnergyHandle handle,
                                     const QByteArray &newValue, quint16 offset);
    bool increaseEncryptLevelfRequired(quint8 errorCode);

private slots:
    void l2cpConnected();
    void l2cpDisconnected();
    void l2cpErrorChanged(QBluetoothSocket::SocketError);
    void l2cpReadyRead();
    void encryptionChangedEvent(const QBluetoothAddress&, bool);
#endif
private:
    QLowEnergyController *q_ptr;

};

QT_END_NAMESPACE

#endif // QLOWENERGYCONTROLLERPRIVATE_P_H