#pragma once

#include <it2s-asn/saem/SAEM.h>
#include <stdint.h>

#define MAX_ANNOUNCEMENTS_LEN 32

typedef enum {
    SAID_ETC = 1,
    SAID_EVCSN = 999 // TODO define
} SAID_e;

typedef struct announcement {
    SAID_e its_aid;
    uint8_t protocol_id;
    uint8_t traffic_class;

    uint8_t* certificate_id; /* neighbour security-layer identity */

    struct {
        uint8_t ipv6_addr[16];
        uint16_t port;
    } endpoint;

    struct {
        uint8_t* context;
        uint16_t context_len;
        uint8_t* data;
        uint16_t data_len;
        void* internal_p;
    } info;

    uint32_t station_id;
    uint64_t timestamp;

    uint32_t n_trigger; /* number of times service was triggered */
    uint64_t t_trigger; /* last trigger timestamp */
} announcement_t;

typedef struct bulletin {
    announcement_t* to_consume[MAX_ANNOUNCEMENTS_LEN];
    uint8_t to_consume_len;

    announcement_t* to_provide[16];
    uint8_t to_provide_len;

    pthread_mutex_t lock;
} bulletin_t;

typedef enum SAEM_CODE {
    SAEM_OK,
    SAEM_NEW,
    SAEM_INVALID_HEADER_MESSAGE_ID,
    SAEM_INVALID_HEADER_VERSION,
    SAEM_MAX_ANNOUNCEMENTS_REACHED
} SAEM_CODE_R;

/** 
 * Initiaties bulletin, the main SA structure
 *
 * @return Nothing
 */
void bulletin_init();

/** 
 * Checks SAEM, saves advertisements
 *
 * @param saem The SAEM message to check
 * @param neighbour The certificate used by the neighbour, for encryption
 * @return SAEM_CODE
 */
SAEM_CODE_R saem_check(SAEM_t* saem, uint8_t* neighbour);

/**
 * The main SA function, run as a thread
 *
 * @return NULL
 */
void* sa_service();