#ifndef NATIVESTREAMER_H
#define NATIVESTREAMER_H

#include <QObject>
#include <QThread>
#include <QString>
#include <QTimer>
#include <atomic>
#include <functional>

class Lib9pClient;

/**
 * NativeStreamer - Streaming file reader using native 9P library.
 *
 * Reads from a 9P file in a worker thread, emitting data as it arrives.
 * Replaces QProcess-based streaming with direct library calls.
 *
 * Restart policies:
 *   Oneshot  — runs once, emits finished on EOF/error
 *   Looping  — always restarts after EOF/error
 *   Guarded  — restarts only if guard() returns true
 */
class NativeStreamer : public QObject
{
    Q_OBJECT
public:
    enum RestartPolicy { Oneshot, Looping, Guarded };

    explicit NativeStreamer(Lib9pClient *client, RestartPolicy policy, QObject *parent = nullptr);
    ~NativeStreamer() override;

    void start(const QString &path);
    void stop();
    bool isRunning() const;

    void setGuard(std::function<bool()> guard);

signals:
    void dataReady(const QByteArray &data);
    void finished();  // Only emitted when not restarting (Oneshot, or Guarded with false guard)
    void errorOccurred(const QString &error);

private slots:
    void onThreadFinished();

private:
    void run();
    void scheduleRestart();

    Lib9pClient *m_client;
    QString m_path;
    QThread *m_thread = nullptr;
    std::atomic<bool> m_running{false};
    std::atomic<bool> m_stopping{false};
    std::atomic<int> m_fid{-1};
    RestartPolicy m_policy;
    std::function<bool()> m_guard;
    QTimer *m_restartTimer = nullptr;
};

#endif // NATIVESTREAMER_H