#pragma once

#ifdef __cplusplus
extern "C"
{
#endif

#include <stdint.h>
#include <stdio.h>

#include "stellar/session.h"

/******************************************************************************
 * session set/get
 ******************************************************************************/

void session_init(struct session *sess);

// session ID
void session_set_id(struct session *sess, uint64_t id);
uint64_t session_get_id(const struct session *sess);

// session tuple
void session_set_tuple6(struct session *sess, const struct tuple6 *tuple);
const struct tuple6 *session_get_tuple6(const struct session *sess);

// session tuple direction
const char *session_get0_readable_addr(const struct session *sess);

// session direction
void session_set_direction(struct session *sess, enum session_direction dir);
enum session_direction session_get_direction(const struct session *sess);

// session flow direction
void session_set_current_flow_direction(struct session *sess, enum flow_direction dir);
enum flow_direction session_get_current_flow_direction(const struct session *sess);

// session state
void session_set_current_state(struct session *sess, enum session_state state);
enum session_state session_get_current_state(const struct session *sess);

// session type
void session_set_type(struct session *sess, enum session_type type);
enum session_type session_get_type(const struct session *sess);

// session seen duplicate traffic
void session_set_duplicate_traffic(struct session *sess);
int session_has_duplicate_traffic(const struct session *sess);

// session closing reason
void session_set_closing_reason(struct session *sess, enum closing_reason reason);
enum closing_reason session_get_closing_reason(const struct session *sess);

// session stat
void session_inc_stat(struct session *sess, enum flow_direction dir, enum session_stat stat, uint64_t val);
uint64_t session_get_stat(const struct session *sess, enum flow_direction dir, enum session_stat stat);

// session timestamp
void session_set_timestamp(struct session *sess, enum session_timestamp type, uint64_t value);
uint64_t session_get_timestamp(const struct session *sess, enum session_timestamp type);

// session sids
void session_clear_sids(struct session *sess, enum flow_direction dir);
void session_set_sids(struct session *sess, enum flow_direction dir, const struct sids *sids);
const struct sids *session_get_sids(const struct session *sess, enum flow_direction dir);

// session route ctx
void session_clear_route_ctx(struct session *sess, enum flow_direction dir);
void session_set_route_ctx(struct session *sess, enum flow_direction dir, const struct route_ctx *ctx);
const struct route_ctx *session_get_route_ctx(const struct session *sess, enum flow_direction dir);

// session first packet
void session_set_first_packet(struct session *sess, enum flow_direction dir, const struct packet *pkt);
const struct packet *session_get_first_packet(const struct session *sess, enum flow_direction dir);

// session current packet
void session_set_current_packet(struct session *sess, const struct packet *pkt);
const struct packet *session_get0_current_packet(const struct session *sess);

// session symmetric
int session_is_symmetric(const struct session *sess, unsigned char *flag);

// session user data
void session_set_user_data(struct session *sess, void *user_data);
void *session_get_user_data(const struct session *sess);

// session tcp segment
struct tcp_segment *session_get_tcp_segment(struct session *sess);
void session_free_tcp_segment(struct session *sess, struct tcp_segment *seg);

/******************************************************************************
 * session ex data
 ******************************************************************************/

typedef void session_ex_free_cb(struct session *sess, uint8_t idx, void *ex_ptr, void *arg);

/*
 * the exdata prodoced by user, and comsumed by same user.
 * so, the exdata is not shared by different user.
 * otherwise, the exdata need dup by refer count, and free by refer count.
 *
 * if key exist, not allow update, return original index.
 */
uint8_t session_get_ex_new_index(const char *key, session_ex_free_cb *free_cb, void *args);

/*
 * Support update ex_data.
 *
 * if key exist: run free_cb free old value, then set new value.
 *     if not run free_cb, old value will be memory leak.
 *     if not allow update, new value will be memory leak.
 * if key not exist: set new value.
 */
void session_set_ex_data(struct session *sess, uint8_t idx, void *val);
void *session_get0_ex_data(const struct session *sess, uint8_t idx);
/*
 * after set ex_data, the owner of ex_data is session, so user should not free it directly.
 * if user want to free ex_data, should use session_free_ex_data.
 */
void session_free_ex_data(struct session *sess, uint8_t idx);
void session_free_all_ex_data(struct session *sess);

/******************************************************************************
 * to string
 ******************************************************************************/

const char *closing_reason_to_str(enum closing_reason reason);
const char *session_state_to_str(enum session_state state);
const char *session_type_to_str(enum session_type type);
const char *flow_direction_to_str(enum flow_direction dir);

// bref : 1, output session bref info
// bref : 0, output session detail info
int session_to_str(const struct session *sess, int bref, char *buff, int size);

static inline void session_print(const struct session *sess)
{
    char buff[4096];
    session_to_str(sess, 0, buff, sizeof(buff));
    printf("%s\n", buff);
}

#ifdef __cplusplus
}
#endif