/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *                                                                         *
 *  Copyright (C) 2019 Simon Stürz <simon.stuerz@nymea.io>                 *
 *                                                                         *
 *  This file is part of nymea.                                            *
 *                                                                         *
 *  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 USBRELAY_H
#define USBRELAY_H

#include <QObject>
#include <hidapi/hidapi.h>

#include "rawhiddevicewatcher.h"

class UsbRelay : public QObject
{
    Q_OBJECT
public:
    explicit UsbRelay(const QString &path, int relayCount, QObject *parent = nullptr);
    ~UsbRelay();

    QString path() const;
    int relayCount() const;

    bool connected() const;

    bool relayPower(int relayNumber) const;
    bool setRelayPower(int relayNumber, bool power);

private:
    RawHidDeviceWatcher *m_deviceWatcher = nullptr;
    hid_device *m_hidDevice = nullptr;

    QString m_path;
    int m_relayCount = 0;
    bool m_connected = false;
    bool m_relayOnePower = false;
    bool m_relayTwoPower = false;

    void setConnected(bool connected);

    // Relay map <relay number>, bool value
    QHash<int, bool> m_relayMap;

    void setRelayPowerInternally(int relayNumber, bool power);

    void readStatus();

    bool switchRelay(int relayNumber, bool power);

signals:
    void connectedChanged(bool connected);
    void relayPowerChanged(int relayNumber, bool power);

private slots:
    void onDeviceAdded(const QString &devicePath);
    void onDeviceRemoved(const QString &devicePath);

};

#endif // USBRELAY_H