#ifndef NATIVESTREAMER_H
#define NATIVESTREAMER_H

#include <QObject>
#include <QProcess>
#include <QString>
#include <QTimer>
#include <functional>

/**
 * NativeStreamer - Streaming file reader using ollie-9p subprocess.
 *
 * Uses ollie-9p subprocess for streaming reads (blocking wait files like
 * chat, statewait, eventwait). The native library is used for request/response
 * operations, but subprocess is needed for streaming because:
 * - Blocking reads in Go can't be interrupted by closing the fid
 * - Subprocess can be killed cleanly
 *
 * 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(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
    void errorOccurred(const QString &error);

private slots:
    void onReadyRead();
    void onProcessFinished(int exitCode, QProcess::ExitStatus status);

private:
    void scheduleRestart();
    static QString ollie9pBin();
    static QString serverAddr();

    QString m_path;
    QProcess *m_process = nullptr;
    RestartPolicy m_policy;
    std::function<bool()> m_guard;
    QTimer *m_restartTimer = nullptr;
    bool m_stopping = false;
};

#endif // NATIVESTREAMER_H