/*!
 *
 * Copyright (c) 2020-2024 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    ApplicationController.h
 * \author  (last)      Dara Navaei
 * \date    (last)      26-Mar-2024
 * \author  (original)  Behrouz NematiPour
 * \date    (original)  26-Aug-2020
 *
 */
#pragma once

// Qt
#include <QObject>

// Project
#include "main.h" // Doxygen : do not remove
#include "ApplicationPost.h"
#include "MessageGlobals.h"

#include "MessageInterpreter.h"

// define
#define _ApplicationController ApplicationController::I()

// forward declarations
class tst_initializations;

// namespace
using namespace Can;

/*!
 * \brief   The ApplicationController class
 * \details Singleton class which is the main gateway of all signal/slots.
 *          This class is the main gate keeper for decisions and will decide if a message should pass through the other observers.
 *          Currently (08/30/2020) is a bridge and will pass all the messages.
 *          Later with implementation/help of the main state machine will decide on the state of the device what needs to be done.
 * \note    States are like [Idle, Run on Battery, Fault, FW connection lost] and such
 */
class ApplicationController : public QObject {
    Q_OBJECT

    // Singleton
    SINGLETON(ApplicationController)

    // friends
    friend class ::tst_initializations;

    QThread *_thread = nullptr;
    bool     _init   = false;

    QFutureWatcher<int> _settingsWatcher;
    int                 _settingsError = 0;

    ApplicationPost _post; // I may need to be put in a concurrent.

public:
    void initSettings();

public slots:
    bool init();
    bool init(QThread &vThread);
    void quit();

    void doUnhandledMsgAppController(const QVariantList &msg);

private:
    void initConnections();

    void initThread(QThread &vThread);
    void quitThread();

    void initSetttings();

    void keepAlive();

    void createFakeSequencedLongMessage (QVariantList &vData, const int vFakeDataLen);
    void createFakeSeqAtBeginLongMessage(QVariantList &vData, const int vFakeDataLen);

private slots: // Should be private for thread safety and is connected internally.
    void onMainTimerTimeout();

    void onActionReceive (const QVariantList &vData); // UI <= HD/DG
    void onActionTransmit(const QVariantList &vData);

    void onExport           ();
    void onExportStat       (quint32 vIndex, const QString &vFileName, quint8 vPercent);

    void onFailedTransmit(Sequence seq);

    void onSettingsUpdate();

    void onPOSTDone         (bool vPass);

    void onQuitApplication  ();

    void onLogIOFail();

signals:

signals:
    void didActionReceive (const QVariantList &vData); // UI <= HD/DG
    void didActionTransmit(const QVariantList &vData); // UI => HD/DG
    void didFailedTransmit(Sequence seq);

    void didExport        ();
    void didExportStat    (quint32 vIndex, const QString &vFileName, quint8 vPercent);
    /*!
     * \brief   didSettingsInit - private signal to start initializing settings
     * \details This signal used internally to make the read task of the settings happen in Application_Thread
     *          It's because no thread assigned to Settings itself, since this class will be used only once
     *          and does not need a thread by itself
     */
    void didSettingsInit  (QPrivateSignal);
    /*!
     * \brief   didSettingsDone
     * \details This signal will be emitted when the settings are read and ready to be used.
     */
    void didSettingsDone  ();
    /*!
     * \brief   didPOSTPass
     * \details This signal will be emitted when UI is done with the POST and will let other layers to know the result.
     *          As an example the Manufacturing or update will not start if the POST failed since it needs POST info for the Encrypted partition.
     * \param   vPass - true if passed.
     */
    void didPOSTPass      (bool vPass);
    /*!
     * \brief   didKeepAliveBegin
     * \details this signal will be emitted by ApplicationController
     *          when it is done with all the messaging and has nothing to say
     *          just to keep the conversation alive and let HD know UI is alive.
     */
    void didKeepAliveBegin      ();
    /*!
     * \brief   didQuitApplication
     * \details this signal is a placeholder for any farther notification to any class which needs to close itself.
     *          it will be used to let the other classes to stop and move to main thread.
     */
    void didQuitApplication     ();

    void didUnhandledMsgAppController(const QVariantList &msg);

    SAFE_CALL(startPOST)
};