import os

DEFAULT_CONSUL_URL = "http://consul.service.dc1.consul:8500"

def get_consul_url(url_arg=None):
    """
    Resolves the Consul URL in the following order:
    1. CLI Argument (url_arg)
    2. Environment Variable (CONSUL_HTTP_ADDR)
    3. Default (http://localhost:8500)
    """
    if url_arg:
        return url_arg
    
    return os.environ.get("CONSUL_HTTP_ADDR", DEFAULT_CONSUL_URL)