/* Профиль конкретного endpoint: изменение адреса и доступность входа независимы.
 * checked_at — время измерения владельца в Unix microseconds, не версия NODEINFO.
 * Профиль помогает выбирать попытки; работоспособность подтверждает транспорт. */
#ifndef ADDRESS_PROFILE_H
#define ADDRESS_PROFILE_H

#include <stdint.h>

enum address_mapping {
    ADDRESS_MAP_UNKNOWN,
    ADDRESS_MAP_UNCHANGED,
    ADDRESS_MAP_EIM,
    ADDRESS_MAP_DEPENDENT
};

enum address_inbound {
    ADDRESS_IN_UNKNOWN,
    ADDRESS_IN_OPEN,
    ADDRESS_IN_CONTACT
};

enum address_profile_source { ADDRESS_SOURCE_NONE, ADDRESS_SOURCE_ETCP, ADDRESS_SOURCE_STUN };

#define ADDRESS_PROFILE_TTL_US UINT64_C(300000000)

struct address_profile {
    uint8_t mapping;
    uint8_t inbound;
    uint8_t source; /* ETCP — этот endpoint; STUN — резервная оценка его IP/netif. */
    uint64_t evidence_id;
    uint64_t checked_at;
};

static inline const char *address_mapping_name(uint8_t value) {
    static const char *const names[] = {"UNKNOWN", "UNCHANGED", "EIM", "DEPENDENT"};
    return value <= ADDRESS_MAP_DEPENDENT ? names[value] : "INVALID";
}

static inline const char *address_inbound_name(uint8_t value) {
    static const char *const names[] = {"UNKNOWN", "OPEN", "CONTACT_REQUIRED"};
    return value <= ADDRESS_IN_CONTACT ? names[value] : "INVALID";
}

static inline const char *address_profile_source_name(uint8_t value) {
    static const char *const names[] = {"NONE", "ETCP", "STUN"};
    return value <= ADDRESS_SOURCE_STUN ? names[value] : "INVALID";
}

static inline int address_profile_valid(const struct address_profile *profile) {
    return profile && profile->mapping <= ADDRESS_MAP_DEPENDENT && profile->inbound <= ADDRESS_IN_CONTACT &&
        profile->source <= ADDRESS_SOURCE_STUN &&
        ((!profile->mapping && !profile->inbound && profile->source == ADDRESS_SOURCE_NONE) ||
         ((profile->mapping || profile->inbound) && profile->source && profile->evidence_id && profile->checked_at));
}

static inline int address_profile_fresh(const struct address_profile *profile, uint64_t now_us) {
    return profile && profile->evidence_id && profile->checked_at && now_us >= profile->checked_at &&
        now_us - profile->checked_at <= ADDRESS_PROFILE_TTL_US;
}

#endif