# -*- coding: utf8 -*-
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# org.onap.vvp/validation-scripts
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import yaml
import pytest


def test_nova_servergroup_policies(yaml_file):
    '''
    Check that nova servergroup resources using either anti-affinity or
    affinity rules in policies
    '''
    req_rules = ['affinity', 'anti-affinity']

    with open(yaml_file) as fh:
        yml = yaml.load(fh)

    # skip if resources are not defined
    if "resources" not in yml:
        pytest.skip("No resources specified in the heat template")

    has_req_rules = []
    for v1 in yml["resources"].values():
        if not isinstance(v1, dict):
            continue
        if "properties" not in v1:
            continue
        if v1.get("type") != "OS::Nova::ServerGroup":
            continue
        if "policies" not in v1["properties"].keys():
            continue

        try:
            all_rules = v1["properties"]["policies"]
            detected_rules = set(all_rules) & set(req_rules)
            has_req_rules.append(len(detected_rules) > 0)
        except (ValueError):
            continue

    if not has_req_rules:
        pytest.skip("No policies Nova::ServerGroup instances were detected")

    assert all(has_req_rules)