/**
 * This file is part of the Fun programming language.
 * https://fun-lang.xyz/
 *
 * Copyright 2025 Johannes Findeisen <you@hanez.org>
 * Licensed under the terms of the Apache-2.0 license.
 * https://opensource.org/license/apache-2-0
 *
 * Added: 2025-10-04
 */

case OP_SOCK_TCP_CONNECT: {
    /* Pops port, host; pushes fd (>0) or 0 */
    Value portv = pop_value(vm);
    Value hostv = pop_value(vm);
    int fd = 0;
#ifdef __unix__
    if (hostv.type != VAL_STRING || portv.type != VAL_INT) {
        fprintf(stderr, "Runtime type error: tcp_connect expects (string host, int port)\n");
        free_value(portv);
        free_value(hostv);
        push_value(vm, make_int(0));
        break;
    }
    char *host = value_to_string_alloc(&hostv);
    int port = (int)portv.i;
    if (host) {
        char portstr[16];
        snprintf(portstr, sizeof(portstr), "%d", port);
        struct addrinfo hints, *res = NULL, *rp;
        memset(&hints, 0, sizeof(hints));
        hints.ai_family = AF_UNSPEC;
        hints.ai_socktype = SOCK_STREAM;
        if (getaddrinfo(host, portstr, &hints, &res) == 0) {
            for (rp = res; rp != NULL; rp = rp->ai_next) {
                int s = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
                if (s < 0) continue;
                if (connect(s, rp->ai_addr, rp->ai_addrlen) == 0) { fd = s; break; }
                close(s);
            }
            if (res) freeaddrinfo(res);
        }
        free(host);
    }
#endif
    free_value(portv);
    free_value(hostv);
    push_value(vm, make_int(fd > 0 ? fd : 0));
    break;
}