#ifndef NSIGNER_SERVER_H
#define NSIGNER_SERVER_H

#include "dispatcher.h"
#include "policy.h"
#include <sys/types.h>

#define SERVER_SOCKET_NAME_MAX 108
#define SERVER_MAX_MSG_SIZE    65536

/* Caller identity */
typedef struct {
    uid_t uid;
    gid_t gid;
    pid_t pid;
    char caller_id[64];  /* "uid:<n>" */
} caller_identity_t;

/* Server context */
typedef struct {
    char socket_name[SERVER_SOCKET_NAME_MAX]; /* abstract namespace name (without \0 prefix) */
    char last_error[256];
    int listen_fd;
    int running;
    dispatcher_ctx_t *dispatcher;
    policy_table_t *policy;
    int socket_name_explicit;
} server_ctx_t;

/* Initialize server context. socket_name is the abstract namespace name (e.g. "nsigner").
 * socket_name_explicit should be non-zero when provided via --socket-name override. */
void server_init(server_ctx_t *ctx, const char *socket_name, int socket_name_explicit,
                 dispatcher_ctx_t *dispatcher, policy_table_t *policy);

/* Start listening. Returns 0 on success, -1 on error. */
int server_start(server_ctx_t *ctx);

/* Get human-readable description of last server error. */
const char *server_last_error(const server_ctx_t *ctx);

/* Handle one pending connection (non-blocking). Returns 1 if handled, 0 if nothing pending, -1 on error.
 * activity_cb is called with a description string for the TUI activity log. */
typedef void (*server_activity_cb)(const char *message, void *user_data);
int server_handle_one(server_ctx_t *ctx, server_activity_cb cb, void *cb_data);

/* Stop server and close socket */
void server_stop(server_ctx_t *ctx);

/* Extract caller identity from connected fd */
int server_get_caller(int fd, caller_identity_t *out);

#endif /* NSIGNER_SERVER_H */