import socket
import subprocess
import time


def resolve(host: str) -> str | None:
    try:
        return socket.gethostbyname(host)
    except Exception:
        return None


def get_real_ip(timeout: int = 10) -> str:
    try:
        r = subprocess.run(
            ["curl", "-s", "--max-time", str(timeout), "https://ifconfig.me/ip"],
            capture_output=True, timeout=timeout + 2,
        )
        return r.stdout.decode().strip() or "unknown (empty)"
    except Exception as e:
        return f"unknown ({e})"


def get_proxied_ip(socks5_port: int, timeout: int = 10) -> str:
    try:
        r = subprocess.run(
            ["curl", "-s", "--max-time", str(timeout),
             "-x", f"socks5h://127.0.0.1:{socks5_port}",
             "https://ifconfig.me/ip"],
            capture_output=True, timeout=timeout + 2,
        )
        return r.stdout.decode().strip() or "unknown (empty)"
    except Exception as e:
        return f"unknown ({e})"


def verify_ip(socks5_port: int, retries: int = 3, delay: float = 2.0) -> str:
    for attempt in range(1, retries + 1):
        ip = get_proxied_ip(socks5_port)
        if not ip.startswith("unknown"):
            return ip
        if attempt < retries:
            time.sleep(delay)
    return "unknown"