import os
import random
from typing import List, Dict, Optional

# Verified live PrivadoVPN SOCKS5 server endpoints
# Note: uses socks5h:// for remote DNS resolution to prevent DNS leaks and connection drops
PRIVADO_SOCKS5_HOSTS = [
    "jfk.socks.privado.io",  # New York JFK
    "ams.socks.privado.io",  # Amsterdam
]

DEFAULT_PRIVADO_USER = "nhqyqsx21846"
DEFAULT_PRIVADO_PASS = "umjy1xyucnch"
DEFAULT_PORT = 1080

def get_privado_proxy_list() -> List[str]:
    """
    Builds socks5h:// proxy URLs for all verified Privado servers.
    """
    user = os.getenv("PRIVADO_USER", DEFAULT_PRIVADO_USER).strip()
    pwd = os.getenv("PRIVADO_PASS", DEFAULT_PRIVADO_PASS).strip()
    
    custom_proxy = os.getenv("SOCKS5_PROXY") or os.getenv("PROXY_URL") or ""
    if custom_proxy:
        proxies = [p.strip() for p in custom_proxy.split(",") if p.strip()]
        if proxies:
            return proxies

    proxy_list = []
    for host in PRIVADO_SOCKS5_HOSTS:
        proxy_list.append(f"socks5h://{user}:{pwd}@{host}:{DEFAULT_PORT}")
    return proxy_list

def get_random_privado_proxy() -> Optional[str]:
    proxies = get_privado_proxy_list()
    if proxies:
        return random.choice(proxies)
    return None

def get_rotating_proxy_dict() -> Dict[str, str]:
    proxy = get_random_privado_proxy()
    if proxy:
        return {"http": proxy, "https": proxy}
    return {}