#ifndef NETWORKMANAGER_H
#define NETWORKMANAGER_H

#include <QObject>
#include <QWebSocket>
#include <QJsonObject>
#include <QJsonArray>
#include <QJsonDocument>
#include <QTimer>

class NetworkManager : public QObject {
    Q_OBJECT
public:
    static NetworkManager& instance() {
        static NetworkManager mgr;
        return mgr;
    }

    void connectToServer(const QString& url);
    void disconnect();
    bool isConnected() const;

    void sendMessage(const QString& type, const QJsonObject& payload = {});

    void joinRoom(const QString& roomId, const QString& nickname);
    void createRoom(const QString& nickname, int maxPlayers);
    void leaveRoom();
    void setReady(bool ready);
    void startGame();
    void selectCard(const QString& cardUid);
    void confirmAction(const QString& action, const QJsonObject& extra = {});
    void effectResponse(const QJsonObject& response);
    void listRooms();
    void sendChat(const QString& text);
    void sendBinaryFrame(const QByteArray& data);

signals:
    void connected();
    void disconnected();
    void connectionError(const QString& error);

    void roomStateUpdated(const QJsonObject& roomState);
    void gameStarted(const QJsonObject& initConfig);
    void gameStateSnapshot(const QJsonObject& snapshot);
    void cardMoveEvent(const QJsonObject& event);
    void cardFlipEvent(const QJsonObject& event);
    void effectTriggered(const QJsonObject& event);
    void requestChoice(const QJsonObject& request);
    void playerExited(const QJsonObject& event);
    void settlementNotify(const QJsonObject& event);
    void gameEnded(const QJsonObject& result);
    void errorNotify(const QJsonObject& error);
    void chatMessage(const QJsonObject& msg);

    void roomCreated(const QString& roomId);
    void roomJoined(const QJsonObject& roomInfo);
    void roomLeft();
    void roomListReceived(const QJsonArray& rooms);
    void settlementResult(const QJsonObject& data);
    void binaryFrameReceived(const QByteArray& data);

private slots:
    void onConnected();
    void onDisconnected();
    void onTextMessageReceived(const QString& message);
    void onError(QAbstractSocket::SocketError error);
    void onHeartbeat();

private:
    explicit NetworkManager(QObject* parent = nullptr);
    ~NetworkManager() override = default;

    void handleServerMessage(const QJsonObject& msg);

    QWebSocket _socket;
    QTimer _heartbeatTimer;
    int _seqNum = 0;
    QString _serverUrl;
};

#endif // NETWORKMANAGER_H