import logging
import sys

try:
    from carconnectivity.carconnectivity import CarConnectivity
except ImportError:
    print(
        "carconnectivity is not installed.  Run:  "
        "pip install carconnectivity carconnectivity-connector-volkswagen",
        file=sys.stderr,
    )
    sys.exit(1)

log = logging.getLogger(__name__)


def connect(username: str, password: str) -> CarConnectivity:
    config = {
        "carConnectivity": {
            "connectors": [
                {
                    "type": "volkswagen",
                    "config": {
                        "username": username,
                        "password": password,
                    },
                }
            ]
        }
    }
    cc = CarConnectivity(config=config)
    cc.startup()
    cc.fetch_all()
    return cc


def select_vehicle(cc: CarConnectivity, vin: str | None):
    """Return (vehicle, error_message). error_message is None on success."""
    vehicles = list(cc.get_garage().list_vehicles())
    if not vehicles:
        return None, "No vehicles found in this CarConnectivity account"
    if vin:
        vehicle = next((v for v in vehicles if v.vin.value == vin), None)
        if not vehicle:
            available = [v.vin.value for v in vehicles]
            return None, f"VIN {vin} not found.  Available: {available}"
        return vehicle, None
    return vehicles[0], None


def update(cc: CarConnectivity) -> None:
    cc.fetch_all()