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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, is_nova_server

from .utils.vm_types import get_vm_types_for_resource, get_vm_types

from .utils.network_roles import get_network_roles


@validates("R-57282")
def test_vm_type_consistent_on_nova_servers(yaml_file):
    """
    Make sure all nova servers have properly formatted properties
    for their name, image and flavor
    """
    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_nova_servers = []
    for k, v in yml["resources"].items():
        if not is_nova_server(v):
            continue
        vm_types = get_vm_types_for_resource(v)
        if len(vm_types) != 1:
            invalid_nova_servers.append(k)

    assert not set(
        invalid_nova_servers
    ), "vm_types not consistant on the following resources: {}".format(
        ",".join(invalid_nova_servers)
    )


@validates("R-48067", "R-00977")
def test_vm_type_network_role_collision(yaml_file):
    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")

    resources = yml["resources"]

    vm_types = get_vm_types(resources)
    network_roles = get_network_roles(resources)

    collisions = []
    for nr in network_roles:
        for vt in vm_types:
            if vt in nr:
                collisions.append(
                    (
                        "vm_type ({}) cannot be a substring " "of network_role ({})"
                    ).format(vt, nr)
                )
            elif nr in vt:
                collisions.append(
                    (
                        "network_role ({}) cannot be a substring " "of vm_type ({})"
                    ).format(nr, vt)
                )

    assert not collisions, ", ".join(collisions)


@validates("R-50436", "R-45188", "R-40499")
def test_nova_server_flavor_parameter(yaml_file):
    check_nova_parameter_format("flavor", yaml_file)


@validates("R-51430", "R-54171", "R-87817")
def test_nova_server_name_parameter(yaml_file):
    check_nova_parameter_format("name", yaml_file)


@validates("R-71152", "R-57282", "R-58670")
def test_nova_server_image_parameter(yaml_file):
    check_nova_parameter_format("image", yaml_file)


def check_nova_parameter_format(prop, yaml_file):

    formats = {
        "string": {
            "name": re.compile(r"(.+?)_name_\d+$"),
            "flavor": re.compile(r"(.+?)_flavor_name$"),
            "image": re.compile(r"(.+?)_image_name$"),
        },
        "comma_delimited_list": {"name": re.compile(r"(.+?)_names$")},
    }

    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")

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

    invalid_parameters = []

    for k, v in yml["resources"].items():
        if not isinstance(v, dict):
            continue
        if v.get("type") != "OS::Nova::Server":
            continue

        prop_val = v.get("properties", {}).get(prop, {})
        prop_param = prop_val.get("get_param", "") if isinstance(prop_val, dict) else ""

        if not prop_param:
            pytest.skip("{} doesn't have property {}".format(k, prop))
        elif isinstance(prop_param, list):
            prop_param = prop_param[0]

        template_param_type = yml.get("parameters", {}).get(prop_param, {}).get("type")

        if not template_param_type:
            pytest.skip("could not determine param type for {}".format(prop_param))

        format_match = formats.get(template_param_type, {}).get(prop)

        if not format_match or not format_match.match(prop_param):
            msg = (
                "Invalid parameter format ({}) on Resource ID ({}) property" " ({})"
            ).format(prop_param, k, prop)
            invalid_parameters.append(msg)

    assert not set(invalid_parameters), ", ".join(invalid_parameters)