/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *                                                                         *
 * Copyright (C) 2019 Simon Stürz <simon.stuerz@nymea.io>                  *
 *                                                                         *
 * This file is part of libnymea-networkmanager.                           *
 *                                                                         *
 *  This library is free software; you can redistribute it and/or          *
 *  modify it under the terms of the GNU Lesser General Public             *
 *  License as published by the Free Software Foundation; either           *
 *  version 2.1 of the License, or (at your option) any later version.     *
 *                                                                         *
 *  This library is distributed in the hope that it will be useful,        *
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU      *
 *  Lesser General Public License for more details.                        *
 *                                                                         *
 *  You should have received a copy of the GNU Lesser General Public       *
 *  License along with this library; If not, see                           *
 *  <http://www.gnu.org/licenses/>.                                        *
 *                                                                         *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#ifndef WIRELESSSERVICE_H
#define WIRELESSSERVICE_H

#include <QObject>
#include <QVariantMap>
#include <QLowEnergyService>
#include <QLowEnergyServiceData>

#include "../networkmanager.h"
#include "../wirelessaccesspoint.h"
#include "../wirelessnetworkdevice.h"

class WirelessService : public QObject
{
    Q_OBJECT

public:
    enum WirelessServiceCommand {
        WirelessServiceCommandInvalid               = -1,
        WirelessServiceCommandGetNetworks           = 0x00,
        WirelessServiceCommandConnect               = 0x01,
        WirelessServiceCommandConnectHidden         = 0x02,
        WirelessServiceCommandDisconnect            = 0x03,
        WirelessServiceCommandScan                  = 0x04,
        WirelessServiceCommandGetCurrentConnection  = 0x05,
        WirelessServiceCommandStartAccessPoint      = 0x06
    };
    Q_ENUM(WirelessServiceCommand)

    enum WirelessServiceResponse {
        WirelessServiceResponseSuccess                     = 0x00,
        WirelessServiceResponseIvalidCommand               = 0x01,
        WirelessServiceResponseIvalidParameters            = 0x02,
        WirelessServiceResponseNetworkManagerNotAvailable  = 0x03,
        WirelessServiceResponseWirelessNotAvailable        = 0x04,
        WirelessServiceResponseWirelessNotEnabled          = 0x05,
        WirelessServiceResponseNetworkingNotEnabled        = 0x06,
        WirelessServiceResponseUnknownError                = 0x07
    };
    Q_ENUM(WirelessServiceResponse)

    explicit WirelessService(QLowEnergyService *service, NetworkManager *networkManager, QObject *parent = nullptr);
    QLowEnergyService *service();

    static QLowEnergyServiceData serviceData(NetworkManager *networkManager);

private:
    QLowEnergyService *m_service = nullptr;
    NetworkManager *m_networkManager = nullptr;
    WirelessNetworkDevice *m_device = nullptr;

    bool m_readingInputData = false;
    QByteArray m_inputDataStream;

    WirelessServiceResponse checkWirelessErrors();

    // Note: static to be available in serviceData
    static QByteArray getWirelessNetworkDeviceState(const NetworkDevice::NetworkDeviceState &state);
    static QByteArray getWirelessMode(WirelessNetworkDevice::Mode mode);

    void streamData(const QVariantMap &responseMap);

    QVariantMap createResponse(const WirelessServiceCommand &command, const WirelessServiceResponse &responseCode = WirelessServiceResponseSuccess);

    // Methods
    void commandGetNetworks(const QVariantMap &request);
    void commandConnect(const QVariantMap &request);
    void commandConnectHidden(const QVariantMap &request);
    void commandDisconnect(const QVariantMap &request);
    void commandScan(const QVariantMap &request);
    void commandGetCurrentConnection(const QVariantMap &request);
    void commandStartAccessPoint(const QVariantMap &request);

private slots:
    // Service
    void characteristicChanged(const QLowEnergyCharacteristic &characteristic, const QByteArray &value);
    void characteristicRead(const QLowEnergyCharacteristic &characteristic, const QByteArray &value);
    void characteristicWritten(const QLowEnergyCharacteristic &characteristic, const QByteArray &value);
    void descriptorRead(const QLowEnergyDescriptor &descriptor, const QByteArray &value);
    void descriptorWritten(const QLowEnergyDescriptor &descriptor, const QByteArray &value);
    void serviceError(const QLowEnergyService::ServiceError &error);

    // Commands
    void processCommand(const QVariantMap &request);

    // Wireless network device
    void onWirelessDeviceBitRateChanged(const int &bitRate);
    void onWirelessDeviceStateChanged(const NetworkDevice::NetworkDeviceState &state);
    void onWirelessModeChanged(WirelessNetworkDevice::Mode mode);

};

#endif // WIRELESSSERVICE_H