# -*- coding: utf8 -*-
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# org.onap.vvp/validation-scripts
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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 = []
    for v1 in yml["parameters"].values():
        if not isinstance(v1, dict):
            continue
        if any(k == 'default' for k in v1):
            invalid_params.append(str(v1))

    assert not set(invalid_params)


@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))