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"""parameters
"""

import re

import pytest
from tests import cached_yaml as yaml

from .helpers import validates

VERSION = "1.0.0"

# one or more (alphanumeric or underscore)
RE_VALID_PARAMETER_NAME = re.compile(r"[\w_]+$")


@validates("R-90526")
def test_default_values(yaml_file):
    """
    Make sure no default values are set for any parameter.
    """
    with open(yaml_file) as fh:
        yml = yaml.load(fh)

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

    invalid_params = set()
    for param, v1 in yml["parameters"].items():
        if not isinstance(v1, dict):
            continue
        if any(k == "default" for k in v1):
            invalid_params.add(param)

    msg = "The following parameters specify a default: {}".format(
        ", ".join(invalid_params)
    )
    assert not invalid_params, msg


@validates("R-25877")
def test_parameter_names(yaml_file):
    """
    A VNF's Heat Orchestration Template's parameter name
    (i.e., <param name>) **MUST** contain only alphanumeric
    characters and underscores ('_').
    """
    with open(yaml_file) as fh:
        yml = yaml.load(fh)

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

    for key in yml["parameters"]:
        assert RE_VALID_PARAMETER_NAME.match(
            key
        ), '%s parameter "%s" not alphanumeric or underscore' % (yaml_file, key)