# Copyright (c) 2021, Ansible Project
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later

from __future__ import annotations

from contextlib import contextmanager
from io import StringIO
from itertools import count
from unittest.mock import patch

from ansible_collections.community.internal_test_tools.tests.unit.plugins.modules.utils import (
    AnsibleExitJson,
    ModuleTestCase,
    set_module_args,
)

from ansible_collections.community.general.plugins.modules import keycloak_client


@contextmanager
def patch_keycloak_api(
    get_client_by_clientid=None, get_client_by_id=None, update_client=None, create_client=None, delete_client=None
):
    """Mock context manager for patching the methods in PwPolicyIPAClient that contact the IPA server

    Patches the `login` and `_post_json` methods

    Keyword arguments are passed to the mock object that patches `_post_json`

    No arguments are passed to the mock object that patches `login` because no tests require it

    Example::

        with patch_ipa(return_value={}) as (mock_login, mock_post):
            ...
    """

    obj = keycloak_client.KeycloakAPI
    with patch.object(obj, "get_client_by_clientid", side_effect=get_client_by_clientid) as mock_get_client_by_clientid:
        with patch.object(obj, "get_client_by_id", side_effect=get_client_by_id) as mock_get_client_by_id:
            with patch.object(obj, "create_client", side_effect=create_client) as mock_create_client:
                with patch.object(obj, "update_client", side_effect=update_client) as mock_update_client:
                    with patch.object(obj, "delete_client", side_effect=delete_client) as mock_delete_client:
                        yield (
                            mock_get_client_by_clientid,
                            mock_get_client_by_id,
                            mock_create_client,
                            mock_update_client,
                            mock_delete_client,
                        )


def get_response(object_with_future_response, method, get_id_call_count):
    if callable(object_with_future_response):
        return object_with_future_response()
    if isinstance(object_with_future_response, dict):
        return get_response(object_with_future_response[method], method, get_id_call_count)
    if isinstance(object_with_future_response, list):
        call_number = next(get_id_call_count)
        return get_response(object_with_future_response[call_number], method, get_id_call_count)
    return object_with_future_response


def build_mocked_request(get_id_user_count, response_dict):
    def _mocked_requests(*args, **kwargs):
        url = args[0]
        method = kwargs["method"]
        future_response = response_dict.get(url, None)
        return get_response(future_response, method, get_id_user_count)

    return _mocked_requests


def create_wrapper(text_as_string):
    """Allow to mock many times a call to one address.
    Without this function, the StringIO is empty for the second call.
    """

    def _create_wrapper():
        return StringIO(text_as_string)

    return _create_wrapper


def mock_good_connection():
    token_response = {
        "http://keycloak.url/auth/realms/master/protocol/openid-connect/token": create_wrapper(
            '{"access_token": "alongtoken"}'
        ),
    }
    return patch(
        "ansible_collections.community.general.plugins.module_utils.identity.keycloak.keycloak.open_url",
        side_effect=build_mocked_request(count(), token_response),
        autospec=True,
    )


class TestKeycloakRealm(ModuleTestCase):
    def setUp(self):
        super().setUp()
        self.module = keycloak_client

    def test_authentication_flow_binding_overrides_feature(self):
        """Add a new realm"""

        module_args = {
            "auth_keycloak_url": "https: // auth.example.com / auth",
            "token": "{{ access_token }}",
            "state": "present",
            "realm": "master",
            "client_id": "test",
            "authentication_flow_binding_overrides": {"browser": "4c90336b-bf1d-4b87-916d-3677ba4e5fbb"},
        }
        return_value_get_client_by_clientid = [
            None,
            {
                "authenticationFlowBindingOverrides": {"browser": "f9502b6d-d76a-4efe-8331-2ddd853c9f9c"},
                "clientId": "onboardingid",
                "enabled": "true",
                "protocol": "openid-connect",
                "redirectUris": ["*"],
            },
        ]
        changed = True

        # Run the module

        with set_module_args(module_args):
            with mock_good_connection():
                with patch_keycloak_api(get_client_by_clientid=return_value_get_client_by_clientid) as (
                    mock_get_client_by_clientid,
                    mock_get_client_by_id,
                    mock_create_client,
                    mock_update_client,
                    mock_delete_client,
                ):
                    with self.assertRaises(AnsibleExitJson) as exec_info:
                        self.module.main()

        self.assertEqual(mock_get_client_by_clientid.call_count, 2)
        self.assertEqual(mock_get_client_by_id.call_count, 0)
        self.assertEqual(mock_create_client.call_count, 1)
        self.assertEqual(mock_update_client.call_count, 0)
        self.assertEqual(mock_delete_client.call_count, 0)

        # Verify that the module's changed status matches what is expected
        self.assertIs(exec_info.exception.args[0]["changed"], changed)