#ifndef ROUTING_H
#define ROUTING_H
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>

// Forward declarations
struct ETCP_CONNECTIONS;

// Типы маршрутов
typedef enum {
    ROUTE_TYPE_STATIC  = 0,
    ROUTE_TYPE_DYNAMIC = 1,
    ROUTE_TYPE_LOCAL   = 2,
    ROUTE_TYPE_LEARNED = 3
} route_type_t;

// Флаги маршрута
typedef enum {
    ROUTE_FLAG_ACTIVE     = (1 << 0),
    ROUTE_FLAG_VALIDATED  = (1 << 1),
    ROUTE_FLAG_ADVERTISED = (1 << 2),
    ROUTE_FLAG_LEARNED    = (1 << 3)
} route_flags_t;

// Расширенные метрики маршрута
struct route_metrics {
    uint32_t bandwidth_kbps;
    uint16_t packet_loss_rate;
    uint16_t latency_ms;
    uint8_t  hop_count;
    uint64_t last_updated;
};

// Расширенная запись маршрута
struct route_entry {
    uint32_t network;
    uint8_t  prefix_length;
    uint32_t next_hop_ip;
    struct ETCP_CONNECTIONS* next_hop;
    route_type_t type;
    uint8_t flags;
    struct route_metrics metrics;
    uint64_t created_time;
    uint64_t last_update;
    uint64_t last_used;
};

// Таблица маршрутизации
struct routing_table {
    struct route_entry *entries;
    size_t count;
    size_t capacity;
    uint32_t *dynamic_subnets;
    size_t dynamic_subnet_count;
    uint32_t *local_subnets;
    size_t local_subnet_count;
    struct {
        uint64_t total_routes;
        uint64_t static_routes;
        uint64_t dynamic_routes;
        uint64_t local_routes;
        uint64_t learned_routes;
        uint64_t routes_added;
        uint64_t routes_deleted;
        uint64_t lookup_count;
        uint64_t hit_count;
        uint64_t routes_lookup_hits;
        uint64_t routes_lookup_misses;
        uint64_t validation_failures;
    } stats;
};

struct routing_table *routing_table_create(void);
void routing_table_destroy(struct routing_table *table);
bool routing_table_insert(struct routing_table *table, const struct route_entry *entry);
bool routing_table_delete(struct routing_table *table, uint32_t network, uint8_t prefix_length, uint32_t source_node_id);
bool routing_table_lookup(struct routing_table *table, uint32_t dest_ip, struct route_entry *best_route);
bool routing_validate_route(struct routing_table *table, uint32_t network, uint8_t prefix_length, route_type_t route_type);
bool routing_add_dynamic_subnet(struct routing_table *table, uint32_t network, uint8_t prefix_length);
bool routing_add_local_subnet(struct routing_table *table, uint32_t network, uint8_t prefix_length);
bool routing_get_all_routes(const struct routing_table *table, uint32_t network, uint8_t prefix_length, struct route_entry **routes, size_t *count);
void routing_table_print(const struct routing_table *table);
const char* route_type_to_string(route_type_t type);
char* ip_to_string(uint32_t ip, char *buffer);

#endif // ROUTING_H