// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QLOWENERGYCONTROLLERPRIVATEBASE_P_H
#define QLOWENERGYCONTROLLERPRIVATEBASE_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <qglobal.h>
#include <QtCore/qobject.h>

#include <QtBluetooth/qlowenergycontroller.h>

#include "qlowenergyserviceprivate_p.h"

QT_BEGIN_NAMESPACE

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

class QLowEnergyControllerPrivate : public QObject
{
    Q_OBJECT
public:
    // This class is required to enable selection of multiple
    // alternative QLowEnergyControllerPrivate implementations on BlueZ.
    // Bluez has a low level ATT protocol stack implementation and a DBus
    // implementation.

    QLowEnergyControllerPrivate();
    virtual ~QLowEnergyControllerPrivate();

    // interface definition
    virtual void init() = 0;
    virtual void connectToDevice() = 0;
    virtual void disconnectFromDevice() = 0;

    virtual void discoverServices() = 0;
    virtual void discoverServiceDetails(const QBluetoothUuid &service,
                                        QLowEnergyService::DiscoveryMode mode) = 0;

    virtual void readCharacteristic(
                        const QSharedPointer<QLowEnergyServicePrivate> service,
                        const QLowEnergyHandle charHandle) = 0;
    virtual void readDescriptor(
                        const QSharedPointer<QLowEnergyServicePrivate> service,
                        const QLowEnergyHandle charHandle,
                        const QLowEnergyHandle descriptorHandle) = 0;

    virtual void writeCharacteristic(
                        const QSharedPointer<QLowEnergyServicePrivate> service,
                        const QLowEnergyHandle charHandle,
                        const QByteArray &newValue,
                        QLowEnergyService::WriteMode writeMode) = 0;
    virtual void writeDescriptor(
                        const QSharedPointer<QLowEnergyServicePrivate> service,
                        const QLowEnergyHandle charHandle,
                        const QLowEnergyHandle descriptorHandle,
                        const QByteArray &newValue) = 0;

    virtual void startAdvertising(
                        const QLowEnergyAdvertisingParameters &params,
                        const QLowEnergyAdvertisingData &advertisingData,
                        const QLowEnergyAdvertisingData &scanResponseData) = 0;
    virtual void stopAdvertising() = 0;

    virtual void requestConnectionUpdate(
                        const QLowEnergyConnectionParameters & params) = 0;
    virtual void addToGenericAttributeList(
                        const QLowEnergyServiceData &service,
                        QLowEnergyHandle startHandle) = 0;

    virtual int mtu() const = 0;
    virtual void readRssi();

    virtual QLowEnergyService *addServiceHelper(
                        const QLowEnergyServiceData &service);

    // common backend methods
    bool isValidLocalAdapter();
    void setError(QLowEnergyController::Error newError);
    void setState(QLowEnergyController::ControllerState newState);

    // public variables
    QLowEnergyController::Role role;
    QLowEnergyController::RemoteAddressType addressType;

    // list of all found service uuids on remote device
    ServiceDataMap serviceList;
    // list of all found service uuids on local peripheral device
    ServiceDataMap localServices;

    //common helper functions
    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);
    void invalidateServices();

protected:
    QLowEnergyController::ControllerState state = QLowEnergyController::UnconnectedState;
    QLowEnergyController::Error error = QLowEnergyController::NoError;
    QString errorString;

    QBluetoothAddress remoteDevice;
    QBluetoothAddress localAdapter;

    QLowEnergyHandle lastLocalHandle{};

    QString remoteName; // device name of the remote
    QBluetoothUuid deviceUuid; // quite useless anywhere but Darwin (CoreBluetooth).

    Q_DECLARE_PUBLIC(QLowEnergyController)
    QLowEnergyController *q_ptr;
};

QT_END_NAMESPACE

#endif // QLOWENERGYCONTROLLERPRIVATEBASE_P_H