/*!
 *
 * Copyright (c) 2019-2020 Diality Inc. - All Rights Reserved.
 * copyright

 *          THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM,

 *          IN PART OR IN WHOLE,

 *          WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.

 *
 * file    messagehandler.h
 * date    10/26/2019
 * author  Behrouz NematiPour
 *
 */
#pragma once

// Qt
#include <QObject>
#include <QCanBus>
#include <QHash>

// Project
#include "main.h"
#include "guiglobals.h"
#include "messagebuilder.h"
#include "messageinterpreter.h"

// Define
#define _MessageHandler MessageHandler::I()

// forward declarations
class unittests;

// namespace
using namespace Gui;
namespace Can {

class MessageHandler : public QObject
{
    Q_OBJECT

    // friends
    friend class ::unittests;

    enum class ChannelGroup {
        eChannel_Unknown,
        eChannel_Ignores,
        eChannel_Listens,
        eChannel_Outputs,
    };

    // Singleton
    SINGLETON_DECL(MessageHandler)
public:
    void init();

private:
    void initConnections();

    void transmitFrame(Can_Id vCan_Id, const QByteArray &vData = 0);

    ChannelGroup checkChannel(quint32 vFrameId, bool *vOK = nullptr);

private slots: // Should be private for thread safety and is connected internally.
    void  onFrameTransmit(Can_Id vCan_ID, const QByteArray   &vData   ); // GUI => CAN
    void  onFrameReceive (                const QCanBusFrame &vFrame  ); // GUI <= CAN

signals:
    void didFrameReceive (Can_Id vCan_ID, const QByteArray   &vPayload); // GUI <= CAN
    void didFrameTransmit(                const QCanBusFrame &vFrame  ); // GUI => CAN
};
}