#ifndef _SESSION_MANAGER_H
#define _SESSION_MANAGER_H

#ifdef __cpluscplus
extern "C"
{
#endif

#include "session.h"

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

// create and destroy
struct session_manager;
struct session_manager *session_manager_create(uint64_t max_session_num);
void session_manager_destroy(struct session_manager *mgr);

// config
typedef void (*session_event_cb)(struct session *sess, uint32_t event, void *arg);
void session_manager_set_session_eventcb(struct session_manager *mgr, session_event_cb cb, void *arg);
void session_manager_set_packet_timeout(struct session_manager *mgr, uint64_t timeout_ms);
void session_manager_set_closing_timeout(struct session_manager *mgr, uint64_t timeout_ms);

// core functions
struct session *session_manager_find_session(struct session_manager *mgr, const struct packet *pkt);
void session_manager_dispatch(struct session_manager *mgr);

// for debug
uint64_t session_manager_get_tcp_opening_sess_num(struct session_manager *mgr);
uint64_t session_manager_get_tcp_closing_sess_num(struct session_manager *mgr);
uint64_t session_manager_get_tcp_active_sess_num(struct session_manager *mgr);
uint64_t session_manager_get_udp_opening_sess_num(struct session_manager *mgr);
uint64_t session_manager_get_udp_closing_sess_num(struct session_manager *mgr);
uint64_t session_manager_get_udp_active_sess_num(struct session_manager *mgr);

#ifdef __cpluscplus
}
#endif

#endif