import pytest

from contextlib import contextmanager
from mock import patch

from data.database import model
from data.users.federated import DISABLED_MESSAGE
from test.test_ldap import mock_ldap
from test.test_keystone_auth import fake_keystone
from test.test_external_jwt_authn import fake_jwt

from test.fixtures import *

@pytest.mark.parametrize('auth_system_builder, user1, user2', [
  (mock_ldap, ('someuser', 'somepass'), ('testy', 'password')),
  (fake_keystone, ('cool.user', 'password'), ('some.neat.user', 'foobar')),
])
def test_auth_createuser(auth_system_builder, user1, user2, config, app):
  with auth_system_builder() as auth:
    # Login as a user and ensure a row in the database is created for them.
    user, err = auth.verify_and_link_user(*user1)
    assert err is None
    assert user

    federated_info = model.user.lookup_federated_login(user, auth.federated_service)
    assert federated_info is not None

    # Disable user creation.
    with patch('features.USER_CREATION', False):
      # Ensure that the existing user can login.
      user_again, err = auth.verify_and_link_user(*user1)
      assert err is None
      assert user_again.id == user.id

      # Ensure that a new user cannot.
      new_user, err = auth.verify_and_link_user(*user2)
      assert new_user is None
      assert err == DISABLED_MESSAGE


@pytest.mark.parametrize(
  'email, blacklisting_enabled, can_create',
  [
    # Blacklisting Enabled, Blacklisted Domain => Blocked
    ('foo@blacklisted.net', True, False),
    ('foo@blacklisted.com', True, False),

    # Blacklisting Enabled, similar to blacklisted domain => Allowed
    ('foo@notblacklisted.com', True, True),
    ('foo@blacklisted.org', True, True),

    # Blacklisting *Disabled*, Blacklisted Domain => Allowed
    ('foo@blacklisted.com', False, True),
    ('foo@blacklisted.net', False, True),
  ]
)
@pytest.mark.parametrize('auth_system_builder', [mock_ldap, fake_keystone, fake_jwt])
def test_createuser_with_blacklist(auth_system_builder, email, blacklisting_enabled, can_create, config, app):
  """Verify email blacklisting with User Creation"""

  MOCK_CONFIG = {'BLACKLISTED_EMAIL_DOMAINS': ['blacklisted.com', 'blacklisted.net']}
  MOCK_PASSWORD = 'somepass'

  with auth_system_builder() as auth:
    with patch('features.BLACKLISTED_EMAILS', blacklisting_enabled):
      with patch.dict('data.model.config.app_config', MOCK_CONFIG):
        with patch('features.USER_CREATION', True):
          new_user, err = auth.verify_and_link_user(email, MOCK_PASSWORD)
          if can_create:
            assert err is None
            assert new_user
          else:
            assert err
            assert new_user is None


@pytest.mark.parametrize('auth_system_builder,auth_kwargs', [
  (mock_ldap, {}),
  (fake_keystone, {'version': 3}),
  (fake_keystone, {'version': 2}),
  (fake_jwt, {}),
])
def test_ping(auth_system_builder, auth_kwargs, app):
  with auth_system_builder(**auth_kwargs) as auth:
    status, err = auth.ping()
    assert status
    assert err is None


@pytest.mark.parametrize('auth_system_builder,auth_kwargs', [
  (mock_ldap, {}),
  (fake_keystone, {'version': 3}),
  (fake_keystone, {'version': 2}),
])
def test_at_least_one_user_exists(auth_system_builder, auth_kwargs, app):
  with auth_system_builder(**auth_kwargs) as auth:
    status, err = auth.at_least_one_user_exists()
    assert status
    assert err is None