"""
Command line entry point for Puppet External Node Classifier (enc).
"""

import yaml
from . import model


def run_enc(fqdn):
    """
    Run the puppet node classifier.

    Runs the node clasifier for puppet, return the data as yaml.
    """
    host = model.Host.query.where(model.Host.fqdn == fqdn).first()
    if not host:
        print(f"No host with name {fqdn}")
        return 1
    out = {
        'environment': host.environment.name,
        'classes': [cls.class_name for cls in host.classes],
    }
    print(yaml.dump(out))
    return 0