"""Interface to the ows-blacklist-manager microservice."""

from owsrequest import request

from backend.constants import error
from backend.constants import services
from backend.exceptions import RequestError


def validate_artists(payload):
    """Validate track artists against the blacklist manager.

    Calls the /validate-artists endpoint to check whether any artists
    on a track are on the Spotify watchlist or other blacklists.

    Args:
        payload (dict): payload containing track_artists list, e.g.
            {'track_artists': [{'tuid': <int>, 'artists': <list>}]}

    Returns:
        dict: validation response JSON from the service

    Raises:
        RequestError: if the service returns a non-200/400 response
    """
    endpoint = '/validate-artists'
    blacklist_response = request.post(
        services.OWS_BLACKLIST_MANAGER, endpoint, json=payload
    )

    response_status = blacklist_response.status_code
    if response_status == 200:
        return {}

    # if an artist is invalid it will throw a 400
    if response_status != 400:
        raise RequestError(
            f'Failed to validate artists against blacklist manager. '
            f'Error: {blacklist_response.text}',
            error_code=error.OWS_BLACKLIST_MANAGER_ERROR,
            http_status=response_status,
        )
    validation_body = blacklist_response.json()
    return validation_body