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#ifndef EVDASHENGINE_H
#define EVDASHENGINE_H

#include <QObject>
#include <QHash>
#include <QJsonObject>

#include <integrations/thing.h>

class QWebSocket;
class QWebSocketServer;

class Thing;
class ThingManager;
class EvDashWebServerResource;

class EvDashEngine : public QObject
{
    Q_OBJECT
public:
    explicit EvDashEngine(ThingManager *thingManager, EvDashWebServerResource *webServerResource, QObject *parent = nullptr);
    ~EvDashEngine() override;

signals:
    void webSocketListeningChanged(bool listening);

private slots:
    void onThingAdded(Thing *thing);
    void onThingRemoved(const ThingId &thingId);
    void onThingChanged(Thing *thing);

private:
    ThingManager *m_thingManager = nullptr;
    EvDashWebServerResource *m_webServerResource = nullptr;
    QWebSocketServer *m_webSocketServer = nullptr;

    QList<QWebSocket *> m_clients;
    QHash<QWebSocket *, QString> m_authenticatedClients;

    QList<Thing *> m_chargers;
    void monitorChargerThing(Thing *thing);

    // Websocket server
    bool startWebSocket(quint16 port = 0);
    void processTextMessage(QWebSocket *socket, const QString &message);

    // Websocket API
    QJsonObject handleApiRequest(QWebSocket *socket, const QJsonObject &request);
    void sendReply(QWebSocket *socket, QJsonObject response) const;
    void sendNotification(const QString &notification, QJsonObject payload) const;

    QJsonObject createSuccessResponse(const QString &requestId, const QJsonObject &payload = {}) const;
    QJsonObject createErrorResponse(const QString &requestId, const QString &errorMessage) const;

    QJsonObject packCharger(Thing *charger) const;

};

#endif // EVDASHENGINE_H