#ifndef QNN_API_HPP
#define QNN_API_HPP

#include <string>

#include "QnnInterface.h"
#include "System/QnnSystemInterface.h"

// Resolved QNN function tables + handles for one backend library.
// The backend (libQnnHtp.so / libQnnCpu.so) and libQnnSystem.so are
// dlopen'd at runtime; nothing links against the SDK.
struct QnnApi {
    void *core_lib = nullptr;
    void *system_lib = nullptr;

    QNN_INTERFACE_VER_TYPE fn{};
    QNN_SYSTEM_INTERFACE_VER_TYPE sys_fn{};

    Qnn_LogHandle_t log = nullptr;
    Qnn_BackendHandle_t backend = nullptr;
    Qnn_DeviceHandle_t device = nullptr;

    std::string backend_lib_name;
    std::string build_id;
};

// Loads the backend + system libraries, resolves providers and creates
// log/backend/device handles. Returns empty string on success, or a
// human-readable error tag (used as the :error atom/message).
std::string qnn_api_open(QnnApi &api,
                         const std::string &backend_lib,
                         const std::string &system_lib,
                         int log_level);

// Frees handles and dlcloses libraries. Safe to call twice.
void qnn_api_close(QnnApi &api);

#endif // QNN_API_HPP