#ifndef _SESSION_MANAGER_H
#define _SESSION_MANAGER_H

#ifdef __cpluscplus
extern "C"
{
#endif

#include "session.h"

// #define SESSION_LOG_ERROR(format, ...) void(0)
#ifndef SESSION_LOG_ERROR
#define SESSION_LOG_ERROR(format, ...) \
    fprintf(stderr, "ERROR (session), " format "\n", ##__VA_ARGS__);
#endif
// #define SESSION_LOG_DEBUG(format, ...) void(0)
#ifndef SESSION_LOG_DEBUG
#define SESSION_LOG_DEBUG(format, ...) \
    fprintf(stderr, "DEBUG (session), " format "\n", ##__VA_ARGS__);
#endif

struct session_manager;
struct session_manager *session_manager_create(uint64_t max_session_num);
void session_manager_destroy(struct session_manager *mgr);

void session_manager_set_timeout_toclosing(struct session_manager *mgr, uint64_t timeout_ms);
void session_manager_set_timeout_toclosed(struct session_manager *mgr, uint64_t timeout_ms);

struct session *session_manager_lookup(struct session_manager *mgr, const struct packet *pkt);
// return null: invalid tuple6 or tcp first packet is not syn
struct session *session_manager_update(struct session_manager *mgr, const struct packet *pkt);
struct session *session_manager_expire(struct session_manager *mgr);
struct session *session_manager_evicte(struct session_manager *mgr);

// for debug
uint64_t session_manager_get_sessions(struct session_manager *mgr, enum session_type type, enum session_state state);

#ifdef __cpluscplus
}
#endif

#endif