# -*- coding: utf8 -*-
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# org.onap.vvp/validation-scripts
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import pytest
import yaml
from .utils.network_roles import get_network_role_from_port,\
                                 property_uses_get_resource
import re


def test_subnet_format(heat_template):
    '''
    Make sure all subnet properties follow the allowed naming
    conventions
    '''
    formats = [
              ["subnet_id", "string", "internal",
               re.compile(r'int_(.+?)_subnet_id')],
              ["subnet_id", "string", "internal",
               re.compile(r'int_(.+?)_v6_subnet_id')],
              ["subnet_id", "string", "external",
               re.compile(r'(.+?)_subnet_id')],
              ["subnet_id", "string", "external",
               re.compile(r'(.+?)_v6_subnet_id')],
              ]

    with open(heat_template) 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")

    invalid_subnets = []
    for v1 in yml["resources"].values():
        if not isinstance(v1, dict):
            continue
        if "properties" not in v1:
            continue
        if v1.get("type") != "OS::Neutron::Port":
            continue
        if property_uses_get_resource(v1, "network"):
            continue
        network_role = get_network_role_from_port(v1)

        # get the network param to define the network_type
        try:
            network_param = v1["properties"]["network"]["get_param"]
        except KeyError:
            continue

        # define the network_type
        network_type = 'external'
        if network_param.startswith('int_'):
            network_type = 'internal'

        for k2, v2 in v1["properties"].items():
            if k2 != "fixed_ips":
                continue

            for v3 in v2:
                if "subnet_id" not in v3:
                    continue

                subnet_id = v3["subnet_id"]
                for v4 in formats:
                    if v4[2] != network_type:
                        continue

                    # get the param or resource
                    if network_type == "external":
                        param_or_res = subnet_id["get_param"]
                    elif network_type == "internal":
                        if subnet_id.get("get_param"):
                            param_or_res = subnet_id["get_param"]
                        elif subnet_id.get("get_resource"):
                            param_or_res = subnet_id["get_resource"]
                        else:
                            continue
                    else:
                        continue

                    m = v4[3].match(param_or_res)
                    if m and m.group(1):
                        snr = m.group(1)
                        if snr.replace("_v6", "") != network_role:
                            invalid_subnets.append(param_or_res)

    assert not set(invalid_subnets)