#ifndef LIB9PCLIENT_H
#define LIB9PCLIENT_H

#include <QObject>
#include <QString>
#include <QByteArray>
#include <libollie9p.h>

// Qt wrapper for libollie9p - provides a clean C++ interface to the Go 9P library.
// Single persistent connection, thread-safe (Go handles internal locking).
class Lib9pClient : public QObject
{
    Q_OBJECT
public:
    explicit Lib9pClient(QObject *parent = nullptr);
    ~Lib9pClient() override;

    // Connection management
    bool connect(const QString &addr, const QString &user, const QString &aname);
    bool connectDefault();  // Uses NAMESPACE and USER env vars
    void disconnect();
    bool isConnected() const { return m_handle > 0; }

    // File operations - all return empty/false on error, check lastError()
    QByteArray read(const QString &path);
    bool write(const QString &path, const QByteArray &data);
    QByteArray rdwr(const QString &path, const QByteArray &data);  // Write then read
    
    // Directory operations
    QStringList ls(const QString &path);
    
    // Metadata
    struct StatResult {
        QString mode;
        qint64 size;
        qint64 mtime;
        QString name;
        bool valid = false;
    };
    StatResult stat(const QString &path);
    
    // File management
    bool remove(const QString &path);
    bool create(const QString &path, uint perm = 0666);
    bool mkdir(const QString &path);
    bool rename(const QString &oldPath, const QString &newName);

    // Streaming API - for continuous reads (chat, statewait, etc.)
    int open(const QString &path);  // Returns fid handle, -1 on error
    int readFid(int fid, char *buf, int bufLen);  // Returns bytes read, 0 on EOF, -1 on error
    void closeFid(int fid);

    // Error handling
    QString lastError() const { return m_lastError; }

private:
    void updateLastError();
    
    int m_handle = -1;
    QString m_lastError;
};

#endif // LIB9PCLIENT_H