/*!
 *
 * Copyright (c) 2019-2019 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    messagepacker.cpp
 * date    12/9/2019
 * author  Behrouz NematiPour
 *
 */
#include "messagedispatcher.h"

// Qt

// Project
#include "logger.h"
#include "applicationcontroller.h"
#include "frameinterface.h"

using namespace Can;

// Singleton
SINGLETON_INIT(MessageDispatcher)

/*!
 * \brief MessageDispatcher Constructor
 * \param parent
 */
MessageDispatcher::MessageDispatcher(QObject *parent) : QObject(parent) { }

/*!
 * \brief Message Handler initializer
 */
void MessageDispatcher::init()
{
    initConnections();
}

/*!
 * \brief Message Handler connections definition
 * \details Initializes the required signal/slot connection between this class and other objects
 *          to be able to communicate.
 */
void MessageDispatcher::initConnections()
{
    // From GUI
    connect(_ApplicationController, SIGNAL(didActionTransmit(GuiActionType, const QVariantList &)),
            this                  ,   SLOT( onActionTransmit(GuiActionType, const QVariantList &)));

    // From HD
    connect(_FrameInterface       , SIGNAL(didFrameReceive  (       Can_Id, const QByteArray   &)),
            this                  ,   SLOT( onFrameReceive  (       Can_Id, const QByteArray   &)));
}

/*!
 * \brief   MessageDispatcher::onFrameReceive
 * \details Upon message has been received over CANBUS this slot will be called
 *          by FrameInterface::didFrameReceive signal to process the frame
 *          Upon completion of collected all the required frames
 *          on successful interpretation of the message, emits didActionReceived signal.
 *          The message will be removed from list of the channel vCan_Id messages.
 * \param   vCanId    - CANBUS channel of the frame
 * \param   vPayload  - Payload of the frame
 */
void MessageDispatcher::onFrameReceive(Can_Id vCanId, const QByteArray &vPayload)
{
    // Append a message to the list
    if (_messageList[vCanId].isEmpty() || _messageList[vCanId].last().isComplete()) {
        _messageList[vCanId].append(Message());
    }

    // build the message
    if (! _builder.buildMessage(vPayload, _messageList[vCanId].last(), vCanId)) {
        _messageList[vCanId].removeLast();
        return;
    }
    Message mMessage = _messageList[vCanId].last();

    // TODO : must be moved to a MessageModel class
    if (mMessage.isComplete()) {
        GuiActionType mActionId;
        QVariantList  mData;
        if (_interpreter.interpretMessage(vCanId, mMessage, mActionId, mData)) {
            emit didActionReceive(mActionId, mData);
        }
        _messageList[vCanId].removeLast();
    }
}

/*!
 * \brief   MessageDispatcher::onActionTransmit
 * \details This slot will be called by ApplicationController::didActionTransmit
 *          upon UI message transmit request and calls MessageDispatcher::actionTransmit method.
 * \param   vActionId - The ActionID of the message
 * \param   vData     - The data of the Message
 */
void MessageDispatcher::onActionTransmit(GuiActionType vActionId, const QVariantList &vData)
{
    actionTransmit(vActionId, vData);
}

/*!
 * \brief   MessageDispatcher::actionTransmit
 * \details This method is called by slot MessageDispatcher::onActionTransmit
 *          which emits didFrameTransmit on successful interpretation of the requested message
 *          and successfully creating of frame(s).
 * \param   vActionId - The ActionID of the message
 * \param   vData     - The data of the Message
 */
void MessageDispatcher::actionTransmit(GuiActionType vActionId, const QVariantList &vData)
{
    QByteArray mData;
    if (! _interpreter.interpretMessage(vActionId, vData, mData)) {
        LOG_ERROR(tr("Incorrect Message, can't be interpreted"));
        return;
    }

    FrameList frameList;
    if ( ! _builder.buildFrames(vActionId, mData, frameList) ) {
        LOG_ERROR(tr("Incorrect Message can't be built"));
        return;
    }
    for (const auto &frame : frameList) {
        emit didFrameTransmit(eChlid_UI, frame);
    }
}