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

from tests import cached_yaml as yaml

from .helpers import validates
from .utils.network_roles import property_uses_get_resource

RE_INTERNAL_NETWORK_RID = re.compile(  # match pattern
    r"int_(?P<network_role>.+)_network$"
)
NETWORK_RESOURCE_TYPES = ["OS::Neutron::Net", "OS::ContrailV2::VirtualNetwork"]


@validates("R-16968", "R-35666")
def test_network_resource_id_format(yaml_file):
    """
    Make sure all network resource ids use the allowed naming
    convention
    """
    RE_INTERNAL_NETWORK_RID = re.compile(  # match pattern
        r"int_(?P<network_role>.+)_network$"
    )

    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")

    invalid_networks = []
    for k, v in yml["resources"].items():
        if not has_properties(v):
            continue
        if property_uses_get_resource(v, "network"):
            continue
        if v.get("type") not in NETWORK_RESOURCE_TYPES:
            continue
        match = RE_INTERNAL_NETWORK_RID.match(k)
        if not match:
            invalid_networks.append(k)

    assert not set(invalid_networks), (
        "Heat templates must only create internal networks "
        "and follow format int_{{network-role}}_network"
        "{}".format(", ".join(invalid_networks))
    )


@validates("R-16241")
def test_network_has_subnet(yaml_file):
    """
    if creating internal network, make sure there is a
    corresponding subnet that references it
    """

    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")

    networks = []

    for k, v in yml["resources"].items():
        if not has_properties(v) or v.get("type") not in ["OS::Neutron::Net"]:
            continue
        # need to check if contrail networks also require subnet
        # and it is defined the same as neutron networks
        # if v.get("type") not in NETWORK_RESOURCE_TYPES:
        networks.append(k)

    for k, v in yml["resources"].items():
        network_prop = v.get("properties", {}).get("network", {}).get("get_resource")
        if (
            not has_properties(v) and v.get("type") != "OS::Neutron::Subnet"
            and not network_prop
        ):
            continue
        x = 0
        for network in networks:
            if network == network_prop:
                networks.pop(x)
                break
            x += 1

    assert not networks, "Networks detected without subnet {}".format(networks)


def has_properties(resource):
    """
    checks resource is a Neutron Subnet
    """
    return isinstance(resource, dict) and "properties" in resource