#ifndef MAZE32_GATEWAY_H
#define MAZE32_GATEWAY_H

#include <stddef.h>
#include <stdint.h>

#include "esp_err.h"
#include "esp_http_server.h"
#include "esp_timer.h"
#include "maze32_lobby.h"

#ifdef __cplusplus
extern "C" {
#endif

#define MAZE32_GATEWAY_CONNECTION_LIMIT MAZE32_SESSION_LIMIT
#define MAZE32_GATEWAY_QUEUE_LIMIT 12U
#define MAZE32_GATEWAY_OUTGOING_LIMIT 768U
#define MAZE32_GATEWAY_RATE_LIMIT_PER_SECOND 20U

typedef struct {
    int active;
    int socket_fd;
    uint32_t last_client_sequence;
    uint64_t rate_window_started_ms;
    unsigned int messages_in_window;
} maze32_gateway_connection_t;

typedef struct {
    int socket_fd;
    size_t length;
    char payload[MAZE32_GATEWAY_OUTGOING_LIMIT];
} maze32_gateway_outgoing_t;

typedef struct {
    httpd_handle_t server;
    maze32_lobby_t lobby;
    maze32_gateway_connection_t connections[MAZE32_GATEWAY_CONNECTION_LIMIT];
    maze32_gateway_outgoing_t outgoing[MAZE32_GATEWAY_QUEUE_LIMIT];
    size_t outgoing_head;
    size_t outgoing_count;
    uint32_t server_sequence;
    unsigned int suggestion_index;
    esp_timer_handle_t countdown_timer;
} maze32_gateway_t;

esp_err_t maze32_gateway_init(maze32_gateway_t* gateway);
void maze32_gateway_set_server(maze32_gateway_t* gateway, httpd_handle_t server);
esp_err_t maze32_gateway_register(httpd_handle_t server, maze32_gateway_t* gateway);
void maze32_gateway_close_socket(httpd_handle_t server, int socket_fd);
int maze32_gateway_can_reconfigure(const maze32_gateway_t* gateway);

#ifdef __cplusplus
}
#endif

#endif