"""
Interface to the ows-product microservice.

The model is responsible to make a call to a ows-product microservice.
It makes a request to ows-product endpoint ('/upc/<int:upc>'',
methods=['HEAD']) and returns a result of the request.

"""

from owsrequest import request

from contracts import response

PRODUCT_UPC_RESOURCE = '/upc/{upc}'
PRODUCT_SERVICE = 'ows-product'


def validate_upc(upc):
    """Check if a product exists with the given UPC.

    Args:
        upc (string): upc
    Returns:
        response.Response: status

    """
    resource = PRODUCT_UPC_RESOURCE.format(upc=upc)
    account_response = request.head(PRODUCT_SERVICE, resource)
    if account_response.status_code == 200:
        return response.create_status_ok_response()
    return response.create_not_found_response('provided upc not found')