from typing import Tuple, Optional, List, Dict
from .client import ComboCoreClient

def get_routes(host: str, user: str, pwd: str, verify_ssl=False, timeout=10.0) -> List[Dict]:
    cli = ComboCoreClient(host, user, pwd, verify_ssl, timeout)
    return cli.get("/core/ncm/api/1/status/routes")

def derive_eth0_cidr_gw(routes: List[Dict]) -> Tuple[str, Optional[str]]:
    gw = None
    ip = None
    masklen = None
    for rt in routes:
        if rt.get("family") == "inet" and rt.get("dst") == "default" and rt.get("dev") == "eth0":
            gw = rt.get("gateway")
    for rt in routes:
        if rt.get("family") == "inet" and rt.get("dev") == "eth0":
            if not ip and rt.get("prefsrc"):
                ip = rt["prefsrc"]
            dst = rt.get("dst", "")
            if "/" in dst:
                try:
                    masklen = int(dst.split("/", 1)[1])
                except Exception:
                    pass
            if ip and masklen is not None:
                break
    if not ip or masklen is None:
        raise RuntimeError("Could not derive eth0 IP/prefix from routes.")
    return f"{ip}/{masklen}", gw