/* log.h — leveled logging.
 *
 * Phase 1: a straightforward thread-safe stderr logger (one writev per record,
 * so lines never interleave). The data path does not log per-message; this is
 * for lifecycle, errors, and stats. A lock-free per-thread ring drain is a
 * later optimization behind the same macros, so call sites never change.
 */
#ifndef NAUT_LOG_H
#define NAUT_LOG_H

#include "naut/common.h"

typedef enum {
    NAUT_LOG_ERROR = 0,
    NAUT_LOG_WARN,
    NAUT_LOG_INFO,
    NAUT_LOG_DEBUG,
    NAUT_LOG_TRACE,
} naut_log_level;

void naut_log_set_level(naut_log_level lvl);
naut_log_level naut_log_get_level(void);

void naut_log_emit(naut_log_level lvl, const char *file, int line,
                   const char *fmt, ...) NAUT_PRINTF(4, 5);

#define NAUT_LOG(lvl, ...) \
    do { if ((lvl) <= naut_log_get_level()) \
        naut_log_emit((lvl), __FILE__, __LINE__, __VA_ARGS__); } while (0)

#define NAUT_ERROR(...) NAUT_LOG(NAUT_LOG_ERROR, __VA_ARGS__)
#define NAUT_WARN(...)  NAUT_LOG(NAUT_LOG_WARN,  __VA_ARGS__)
#define NAUT_INFO(...)  NAUT_LOG(NAUT_LOG_INFO,  __VA_ARGS__)
#define NAUT_DEBUG(...) NAUT_LOG(NAUT_LOG_DEBUG, __VA_ARGS__)
#define NAUT_TRACE(...) NAUT_LOG(NAUT_LOG_TRACE, __VA_ARGS__)

/* Fatal: log and abort(). Use only for unrecoverable invariant violations. */
NAUT_NORETURN void naut_panic(const char *file, int line, const char *fmt, ...)
    NAUT_PRINTF(3, 4);
#define NAUT_PANIC(...) naut_panic(__FILE__, __LINE__, __VA_ARGS__)

#define NAUT_ASSERT(cond) \
    do { if (NAUT_UNLIKELY(!(cond))) NAUT_PANIC("assertion failed: %s", #cond); } while (0)

#endif /* NAUT_LOG_H */