# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

import os
from urllib import parse

import tempest.lib.cli.base

from novaclient import client
from novaclient.tests.functional import base


class TestAuthentication(base.ClientTestBase):

    def _get_url(self, identity_api_version):
        url = parse.urlparse(self.cli_clients.uri)
        return parse.urlunparse((url.scheme, url.netloc,
                                 '/identity/v%s' % identity_api_version,
                                 url.params, url.query,
                                 url.fragment))

    def nova_auth_with_password(self, action, identity_api_version):
        flags = (
            f'--os-username {self.cli_clients.username} '
            f'--os-tenant-name {self.cli_clients.tenant_name} '
            f'--os-password {self.cli_clients.password} '
            f'--os-auth-url {self._get_url(identity_api_version)} '
            f'--os-endpoint-type publicURL'
        )
        if self.cacert:
            flags = f'{flags} --os-cacert {self.cacert}'
        if self.cert:
            flags = f'{flags} --os-cert {self.cert}'
        if self.cli_clients.insecure:
            flags = f'{flags} --insecure'

        return tempest.lib.cli.base.execute(
            "nova", action, flags, cli_dir=self.cli_clients.cli_dir)

    def nova_auth_with_token(self, identity_api_version):
        auth_ref = self.client.client.session.auth.get_access(
            self.client.client.session)
        token = auth_ref.auth_token
        auth_url = self._get_url(identity_api_version)
        kw = {}
        if identity_api_version == "3":
            kw["project_domain_id"] = self.project_domain_id
        nova = client.Client("2", auth_token=token, auth_url=auth_url,
                             project_name=self.project_name,
                             cacert=self.cacert, cert=self.cert,
                             **kw)
        nova.servers.list()

        # NOTE(andreykurilin): tempest.lib.cli.base.execute doesn't allow to
        #   pass 'env' argument to subprocess.Popen for overriding the current
        #   process' environment.
        #   When one of OS_AUTH_TYPE or OS_AUTH_PLUGIN environment variables
        #   presents, keystoneauth1 can load the wrong auth plugin with wrong
        #   expected cli arguments. To avoid this case, we need to modify
        #   current environment.
        # TODO(andreykurilin): tempest.lib.cli.base.execute is quite simple
        #   method that can be replaced by subprocess.check_output direct call
        #   with passing env argument to avoid modifying the current process
        #   environment. or we probably can propose a change to tempest.
        os.environ.pop("OS_AUTH_TYPE", None)
        os.environ.pop("OS_AUTH_PLUGIN", None)

        flags = (
            f'--os-tenant-name {self.project_name} '
            f'--os-token {token} '
            f'--os-auth-url {auth_url} '
            f'--os-endpoint-type publicURL'
        )
        if self.cacert:
            flags = f'{flags} --os-cacert {self.cacert}'
        if self.cert:
            flags = f'{flags} --os-cert {self.cert}'
        if self.cli_clients.insecure:
            flags = f'{flags} --insecure'

        tempest.lib.cli.base.execute(
            "nova", "list", flags, cli_dir=self.cli_clients.cli_dir)

    def test_auth_via_keystone_v2(self):
        session = self.keystone.session
        version = (2, 0)
        if not base.is_keystone_version_available(session, version):
            self.skipTest("Identity API version 2.0 is not available.")

        self.nova_auth_with_password("list", identity_api_version="2.0")
        self.nova_auth_with_token(identity_api_version="2.0")

    def test_auth_via_keystone_v3(self):
        session = self.keystone.session
        version = (3, 0)
        if not base.is_keystone_version_available(session, version):
            self.skipTest("Identity API version 3.0 is not available.")

        self.nova_auth_with_password("list", identity_api_version="3")
        self.nova_auth_with_token(identity_api_version="3")