/*!
 *
 * Copyright (c) 2024-2026 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    CloudConnectController.h
 * \author  (original)  Stephen Quong
 * \date    (original)  24-May-2026
 *
 */
#pragma once

#include <QCanBusFrame>
#include <QHash>
#include <QMap>
#include <QObject>
#include <QSharedPointer>
#include <QString>
#include <QThread>

#include "CanInterface.h"
#include "CanMessage.h"
#include "CloudConnectFrame.h"
#include "CloudConnectServer.h"
#include "MessageDispatcher.h"
#include "MqttClient.h"

using namespace Can;

/*!
 * \brief   CloudConnect controller
 */
class CloudConnectController : public QObject
{
    Q_OBJECT

public:
    explicit CloudConnectController(QObject *parent = nullptr);
    ~CloudConnectController();

    bool loadConfig(const QString &configPath);
    bool startCan();
    bool listenForApp();
    bool connectToCloud();
    void initThread(QThread &thread);

private:
    /*!
     * \brief   CAN message routing actions
     */
    enum class CanAction {
        Drop,
        SendAlways,
        SendDelta,
    };

    /*!
     * \brief   CAN message routing entry loaded from CAN handling INI.
     */
    struct CanRouting {
        CanAction action = CanAction::Drop;
        CloudConnectFrame::Topic topic = CloudConnectFrame::Topic::NormalPriority;
    };

    bool loadCanRouting(const QString &canRoutingPath);
    QString mqttTopic(CloudConnectFrame::Topic topic) const;

    Can::CanInterface _canInterface;
    Can::MessageDispatcher _dispatcher;
    QMap<Can::MsgId, std::pair<bool, Can::Message>> _canCache;
    QHash<Can::MsgId, CanRouting> _canRouting;
    QString _appServerSocketPath;
    QSharedPointer<CloudConnectServer> _appServer;
    MqttClient _mqttClient;
    QString _topicPrefix; // TODO: define in INI?
    QString _deviceId; // TODO: this needs to be sent from Leahi app or retrieved from somewhere

    QString _serialNumber;
    QString _deviceCertPath;
    QString _deviceKeyPath;

private Q_SLOTS:
    void onCanFrameReceive(const QCanBusFrame &frame);
    void onCanMessageReceive(const Can::Message &msg);
    void onCloudStateChanged(QMqttClient::ClientState state);
    void onCloudMessageStatusChanged(qint32 id, QMqtt::MessageStatus status,
        const QMqttMessageStatusProperties &properties);
    void onCloudMessageReceived(const QString &topic, const QByteArray &payload);
};