import random
import asyncio

class ProxyManager:
    def __init__(self, proxies):
        if not proxies:
            raise ValueError("Proxy list cannot be empty")
        self.proxies = proxies

    async def get_proxy_url(self):
        """
        Get a random proxy URL from the list.
        """
        if not self.proxies:
            return None
        return random.choice(self.proxies)

# Example proxy list (replace with your actual proxies)
# It's recommended to use environment variables to store proxies
# For example: proxies = os.getenv("HTTP_PROXIES", "").split(",")
proxies = [
    "http://user:pass@host1:port",
    "http://user:pass@host2:port",
    "http://user:pass@host3:port",
]

proxy_manager = ProxyManager(proxies)

# For backward compatibility, if needed
async def get_proxy_url():
    return await proxy_manager.get_proxy_url()