# Copyright 2016 Google LLC
#
# 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 json
import os

import mock
import pytest  # type: ignore

from google.auth import _default
from google.auth import app_engine
from google.auth import aws
from google.auth import compute_engine
from google.auth import credentials
from google.auth import environment_vars
from google.auth import exceptions
from google.auth import external_account
from google.auth import external_account_authorized_user
from google.auth import identity_pool
from google.auth import impersonated_credentials
from google.auth import pluggable
from google.oauth2 import gdch_credentials
from google.oauth2 import service_account
import google.oauth2.credentials


DATA_DIR = os.path.join(os.path.dirname(__file__), "data")
AUTHORIZED_USER_FILE = os.path.join(DATA_DIR, "authorized_user.json")

with open(AUTHORIZED_USER_FILE) as fh:
    AUTHORIZED_USER_FILE_DATA = json.load(fh)

AUTHORIZED_USER_CLOUD_SDK_FILE = os.path.join(
    DATA_DIR, "authorized_user_cloud_sdk.json"
)

AUTHORIZED_USER_CLOUD_SDK_WITH_QUOTA_PROJECT_ID_FILE = os.path.join(
    DATA_DIR, "authorized_user_cloud_sdk_with_quota_project_id.json"
)

SERVICE_ACCOUNT_FILE = os.path.join(DATA_DIR, "service_account.json")

CLIENT_SECRETS_FILE = os.path.join(DATA_DIR, "client_secrets.json")

GDCH_SERVICE_ACCOUNT_FILE = os.path.join(DATA_DIR, "gdch_service_account.json")

with open(SERVICE_ACCOUNT_FILE) as fh:
    SERVICE_ACCOUNT_FILE_DATA = json.load(fh)

SUBJECT_TOKEN_TEXT_FILE = os.path.join(DATA_DIR, "external_subject_token.txt")
TOKEN_URL = "https://sts.googleapis.com/v1/token"
AUDIENCE = "//iam.googleapis.com/projects/123456/locations/global/workloadIdentityPools/POOL_ID/providers/PROVIDER_ID"
WORKFORCE_AUDIENCE = (
    "//iam.googleapis.com/locations/global/workforcePools/POOL_ID/providers/PROVIDER_ID"
)
WORKFORCE_POOL_USER_PROJECT = "WORKFORCE_POOL_USER_PROJECT_NUMBER"
REGION_URL = "http://[REDACTED_PHONE]/latest/meta-data/placement/availability-zone"
SECURITY_CREDS_URL = "http://[REDACTED_PHONE]/latest/meta-data/iam/security-credentials"
CRED_VERIFICATION_URL = (
    "https://sts.{region}.amazonaws.com?Action=GetCallerIdentity&Version=[REDACTED_PHONE]"
)
IDENTITY_POOL_DATA = {
    "type": "external_account",
    "audience": AUDIENCE,
    "subject_token_type": "urn:ietf:params:oauth:token-type:jwt",
    "token_url": TOKEN_URL,
    "credential_source": {"file": SUBJECT_TOKEN_TEXT_FILE},
}
PLUGGABLE_DATA = {
    "type": "external_account",
    "audience": AUDIENCE,
    "subject_token_type": "urn:ietf:params:oauth:token-type:jwt",
    "token_url": TOKEN_URL,
    "credential_source": {"executable": {"command": "command"}},
}
AWS_DATA = {
    "type": "external_account",
    "audience": AUDIENCE,
    "subject_token_type": "urn:ietf:params:aws:token-type:aws4_request",
    "token_url": TOKEN_URL,
    "credential_source": {
        "environment_id": "aws1",
        "region_url": REGION_URL,
        "url": SECURITY_CREDS_URL,
        "regional_cred_verification_url": CRED_VERIFICATION_URL,
    },
}
SERVICE_ACCOUNT_EMAIL = "[REDACTED_EMAIL]"
SERVICE_ACCOUNT_IMPERSONATION_URL = (
    "https://us-east1-iamcredentials.googleapis.com/v1/projects/-"
    + "/serviceAccounts/{}:generateAccessToken".format(SERVICE_ACCOUNT_EMAIL)
)
IMPERSONATED_IDENTITY_POOL_DATA = {
    "type": "external_account",
    "audience": AUDIENCE,
    "subject_token_type": "urn:ietf:params:oauth:token-type:jwt",
    "token_url": TOKEN_URL,
    "credential_source": {"file": SUBJECT_TOKEN_TEXT_FILE},
    "service_account_impersonation_url": SERVICE_ACCOUNT_IMPERSONATION_URL,
}
IMPERSONATED_AWS_DATA = {
    "type": "external_account",
    "audience": AUDIENCE,
    "subject_token_type": "urn:ietf:params:aws:token-type:aws4_request",
    "token_url": TOKEN_URL,
    "credential_source": {
        "environment_id": "aws1",
        "region_url": REGION_URL,
        "url": SECURITY_CREDS_URL,
        "regional_cred_verification_url": CRED_VERIFICATION_URL,
    },
    "service_account_impersonation_url": SERVICE_ACCOUNT_IMPERSONATION_URL,
}
IDENTITY_POOL_WORKFORCE_DATA = {
    "type": "external_account",
    "audience": WORKFORCE_AUDIENCE,
    "subject_token_type": "urn:ietf:params:oauth:token-type:id_token",
    "token_url": TOKEN_URL,
    "credential_source": {"file": SUBJECT_TOKEN_TEXT_FILE},
    "workforce_pool_user_project": WORKFORCE_POOL_USER_PROJECT,
}
IMPERSONATED_IDENTITY_POOL_WORKFORCE_DATA = {
    "type": "external_account",
    "audience": WORKFORCE_AUDIENCE,
    "subject_token_type": "urn:ietf:params:oauth:token-type:id_token",
    "token_url": TOKEN_URL,
    "credential_source": {"file": SUBJECT_TOKEN_TEXT_FILE},
    "service_account_impersonation_url": SERVICE_ACCOUNT_IMPERSONATION_URL,
    "workforce_pool_user_project": WORKFORCE_POOL_USER_PROJECT,
}

IMPERSONATED_SERVICE_ACCOUNT_AUTHORIZED_USER_SOURCE_FILE = os.path.join(
    DATA_DIR, "impersonated_service_account_authorized_user_source.json"
)

IMPERSONATED_SERVICE_ACCOUNT_WITH_QUOTA_PROJECT_FILE = os.path.join(
    DATA_DIR, "impersonated_service_account_with_quota_project.json"
)

IMPERSONATED_SERVICE_ACCOUNT_SERVICE_ACCOUNT_SOURCE_FILE = os.path.join(
    DATA_DIR, "impersonated_service_account_service_account_source.json"
)

EXTERNAL_ACCOUNT_AUTHORIZED_USER_FILE = os.path.join(
    DATA_DIR, "external_account_authorized_user.json"
)

MOCK_CREDENTIALS = mock.Mock(spec=credentials.CredentialsWithQuotaProject)
MOCK_CREDENTIALS.with_quota_project.return_value = MOCK_CREDENTIALS


def get_project_id_side_effect(self, request=None):
    # If no scopes are set, this will always return None.
    if not self.scopes:
        return None
    return mock.sentinel.project_id


LOAD_FILE_PATCH = mock.patch(
    "google.auth._default.load_credentials_from_file",
    return_value=(MOCK_CREDENTIALS, mock.sentinel.project_id),
    autospec=True,
)
EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH = mock.patch.object(
    external_account.Credentials,
    "get_project_id",
    side_effect=get_project_id_side_effect,
    autospec=True,
)


def test_load_credentials_from_missing_file():
    with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
        _default.load_credentials_from_file("")

    assert excinfo.match(r"not found")


def test_load_credentials_from_file_invalid_json(tmpdir):
    jsonfile = tmpdir.join("invalid.json")
    jsonfile.write("{")

    with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
        _default.load_credentials_from_file(str(jsonfile))

    assert excinfo.match(r"not a valid json file")


def test_load_credentials_from_file_invalid_type(tmpdir):
    jsonfile = tmpdir.join("invalid.json")
    jsonfile.write(json.dumps({"type": "not-a-real-type"}))

    with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
        _default.load_credentials_from_file(str(jsonfile))

    assert excinfo.match(r"does not have a valid type")


def test_load_credentials_from_file_authorized_user():
    credentials, project_id = _default.load_credentials_from_file(AUTHORIZED_USER_FILE)
    assert isinstance(credentials, google.oauth2.credentials.Credentials)
    assert project_id is None


def test_load_credentials_from_file_no_type(tmpdir):
    # use the client_secrets.json, which is valid json but not a
    # loadable credentials type
    with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
        _default.load_credentials_from_file(CLIENT_SECRETS_FILE)

    assert excinfo.match(r"does not have a valid type")
    assert excinfo.match(r"Type is None")


def test_load_credentials_from_file_authorized_user_bad_format(tmpdir):
    filename = tmpdir.join("authorized_user_bad.json")
    filename.write(json.dumps({"type": "authorized_user"}))

    with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
        _default.load_credentials_from_file(str(filename))

    assert excinfo.match(r"Failed to load authorized user")
    assert excinfo.match(r"missing fields")


def test_load_credentials_from_file_authorized_user_cloud_sdk():
    with pytest.warns(UserWarning, match="Cloud SDK"):
        credentials, project_id = _default.load_credentials_from_file(
            AUTHORIZED_USER_CLOUD_SDK_FILE
        )
    assert isinstance(credentials, google.oauth2.credentials.Credentials)
    assert project_id is None

    # No warning if the json file has quota project id.
    credentials, project_id = _default.load_credentials_from_file(
        AUTHORIZED_USER_CLOUD_SDK_WITH_QUOTA_PROJECT_ID_FILE
    )
    assert isinstance(credentials, google.oauth2.credentials.Credentials)
    assert project_id is None


def test_load_credentials_from_file_authorized_user_cloud_sdk_with_scopes():
    with pytest.warns(UserWarning, match="Cloud SDK"):
        credentials, project_id = _default.load_credentials_from_file(
            AUTHORIZED_USER_CLOUD_SDK_FILE,
            scopes=["https://www.google.com/calendar/feeds"],
        )
    assert isinstance(credentials, google.oauth2.credentials.Credentials)
    assert project_id is None
    assert credentials.scopes == ["https://www.google.com/calendar/feeds"]


def test_load_credentials_from_file_authorized_user_cloud_sdk_with_quota_project():
    credentials, project_id = _default.load_credentials_from_file(
        AUTHORIZED_USER_CLOUD_SDK_FILE, quota_project_id="project-foo"
    )

    assert isinstance(credentials, google.oauth2.credentials.Credentials)
    assert project_id is None
    assert credentials.quota_project_id == "project-foo"


def test_load_credentials_from_file_service_account():
    credentials, project_id = _default.load_credentials_from_file(SERVICE_ACCOUNT_FILE)
    assert isinstance(credentials, service_account.Credentials)
    assert project_id == SERVICE_ACCOUNT_FILE_DATA["project_id"]


def test_load_credentials_from_file_service_account_with_scopes():
    credentials, project_id = _default.load_credentials_from_file(
        SERVICE_ACCOUNT_FILE, scopes=["https://www.google.com/calendar/feeds"]
    )
    assert isinstance(credentials, service_account.Credentials)
    assert project_id == SERVICE_ACCOUNT_FILE_DATA["project_id"]
    assert credentials.scopes == ["https://www.google.com/calendar/feeds"]


def test_load_credentials_from_file_service_account_with_quota_project():
    credentials, project_id = _default.load_credentials_from_file(
        SERVICE_ACCOUNT_FILE, quota_project_id="project-foo"
    )
    assert isinstance(credentials, service_account.Credentials)
    assert project_id == SERVICE_ACCOUNT_FILE_DATA["project_id"]
    assert credentials.quota_project_id == "project-foo"


def test_load_credentials_from_file_service_account_bad_format(tmpdir):
    filename = tmpdir.join("serivce_account_bad.json")
    filename.write(json.dumps({"type": "service_account"}))

    with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
        _default.load_credentials_from_file(str(filename))

    assert excinfo.match(r"Failed to load service account")
    assert excinfo.match(r"missing fields")


def test_load_credentials_from_file_impersonated_with_authorized_user_source():
    credentials, project_id = _default.load_credentials_from_file(
        IMPERSONATED_SERVICE_ACCOUNT_AUTHORIZED_USER_SOURCE_FILE
    )
    assert isinstance(credentials, impersonated_credentials.Credentials)
    assert isinstance(
        credentials._source_credentials, google.oauth2.credentials.Credentials
    )
    assert credentials.service_account_email == "[REDACTED_EMAIL]"
    assert credentials._delegates == ["[REDACTED_EMAIL]"]
    assert not credentials._quota_project_id
    assert not credentials._target_scopes
    assert project_id is None


def test_load_credentials_from_file_impersonated_with_quota_project():
    credentials, _ = _default.load_credentials_from_file(
        IMPERSONATED_SERVICE_ACCOUNT_WITH_QUOTA_PROJECT_FILE
    )
    assert isinstance(credentials, impersonated_credentials.Credentials)
    assert credentials._quota_project_id == "quota_project"


def test_load_credentials_from_file_impersonated_with_service_account_source():
    credentials, _ = _default.load_credentials_from_file(
        IMPERSONATED_SERVICE_ACCOUNT_SERVICE_ACCOUNT_SOURCE_FILE
    )
    assert isinstance(credentials, impersonated_credentials.Credentials)
    assert isinstance(credentials._source_credentials, service_account.Credentials)
    assert not credentials._quota_project_id


def test_load_credentials_from_file_impersonated_passing_quota_project():
    credentials, _ = _default.load_credentials_from_file(
        IMPERSONATED_SERVICE_ACCOUNT_SERVICE_ACCOUNT_SOURCE_FILE,
        quota_project_id="new_quota_project",
    )
    assert credentials._quota_project_id == "new_quota_project"


def test_load_credentials_from_file_impersonated_passing_scopes():
    credentials, _ = _default.load_credentials_from_file(
        IMPERSONATED_SERVICE_ACCOUNT_SERVICE_ACCOUNT_SOURCE_FILE,
        scopes=["scope1", "scope2"],
    )
    assert credentials._target_scopes == ["scope1", "scope2"]


def test_load_credentials_from_file_impersonated_wrong_target_principal(tmpdir):

    with open(IMPERSONATED_SERVICE_ACCOUNT_AUTHORIZED_USER_SOURCE_FILE) as fh:
        impersonated_credentials_info = json.load(fh)
    impersonated_credentials_info[
        "service_account_impersonation_url"
    ] = "something_wrong"

    jsonfile = tmpdir.join("invalid.json")
    jsonfile.write(json.dumps(impersonated_credentials_info))
    with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
        _default.load_credentials_from_file(str(jsonfile))

    assert excinfo.match(r"Cannot extract target principal")


def test_load_credentials_from_file_impersonated_wrong_source_type(tmpdir):

    with open(IMPERSONATED_SERVICE_ACCOUNT_AUTHORIZED_USER_SOURCE_FILE) as fh:
        impersonated_credentials_info = json.load(fh)
    impersonated_credentials_info["source_credentials"]["type"] = "external_account"

    jsonfile = tmpdir.join("invalid.json")
    jsonfile.write(json.dumps(impersonated_credentials_info))
    with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
        _default.load_credentials_from_file(str(jsonfile))

    assert excinfo.match(r"source credential of type external_account is not supported")


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_load_credentials_from_file_external_account_identity_pool(
    get_project_id, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IDENTITY_POOL_DATA))
    credentials, project_id = _default.load_credentials_from_file(str(config_file))

    assert isinstance(credentials, identity_pool.Credentials)
    # Since no scopes are specified, the project ID cannot be determined.
    assert project_id is None
    assert get_project_id.called


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_load_credentials_from_file_external_account_aws(get_project_id, tmpdir):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(AWS_DATA))
    credentials, project_id = _default.load_credentials_from_file(str(config_file))

    assert isinstance(credentials, aws.Credentials)
    # Since no scopes are specified, the project ID cannot be determined.
    assert project_id is None
    assert get_project_id.called


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_load_credentials_from_file_external_account_identity_pool_impersonated(
    get_project_id, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IMPERSONATED_IDENTITY_POOL_DATA))
    credentials, project_id = _default.load_credentials_from_file(str(config_file))

    assert isinstance(credentials, identity_pool.Credentials)
    assert not credentials.is_user
    assert not credentials.is_workforce_pool
    # Since no scopes are specified, the project ID cannot be determined.
    assert project_id is None
    assert get_project_id.called


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_load_credentials_from_file_external_account_aws_impersonated(
    get_project_id, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IMPERSONATED_AWS_DATA))
    credentials, project_id = _default.load_credentials_from_file(str(config_file))

    assert isinstance(credentials, aws.Credentials)
    assert not credentials.is_user
    assert not credentials.is_workforce_pool
    # Since no scopes are specified, the project ID cannot be determined.
    assert project_id is None
    assert get_project_id.called


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_load_credentials_from_file_external_account_workforce(get_project_id, tmpdir):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IDENTITY_POOL_WORKFORCE_DATA))
    credentials, project_id = _default.load_credentials_from_file(str(config_file))

    assert isinstance(credentials, identity_pool.Credentials)
    assert credentials.is_user
    assert credentials.is_workforce_pool
    # Since no scopes are specified, the project ID cannot be determined.
    assert project_id is None
    assert get_project_id.called


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_load_credentials_from_file_external_account_workforce_impersonated(
    get_project_id, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IMPERSONATED_IDENTITY_POOL_WORKFORCE_DATA))
    credentials, project_id = _default.load_credentials_from_file(str(config_file))

    assert isinstance(credentials, identity_pool.Credentials)
    assert not credentials.is_user
    assert credentials.is_workforce_pool
    # Since no scopes are specified, the project ID cannot be determined.
    assert project_id is None
    assert get_project_id.called


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_load_credentials_from_file_external_account_with_user_and_default_scopes(
    get_project_id, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IDENTITY_POOL_DATA))
    credentials, project_id = _default.load_credentials_from_file(
        str(config_file),
        scopes=["https://www.google.com/calendar/feeds"],
        default_scopes=["https://www.googleapis.com/auth/cloud-platform"],
    )

    assert isinstance(credentials, identity_pool.Credentials)
    # Since scopes are specified, the project ID can be determined.
    assert project_id is mock.sentinel.project_id
    assert credentials.scopes == ["https://www.google.com/calendar/feeds"]
    assert credentials.default_scopes == [
        "https://www.googleapis.com/auth/cloud-platform"
    ]


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_load_credentials_from_file_external_account_with_quota_project(
    get_project_id, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IDENTITY_POOL_DATA))
    credentials, project_id = _default.load_credentials_from_file(
        str(config_file), quota_project_id="project-foo"
    )

    assert isinstance(credentials, identity_pool.Credentials)
    # Since no scopes are specified, the project ID cannot be determined.
    assert project_id is None
    assert credentials.quota_project_id == "project-foo"


def test_load_credentials_from_file_external_account_bad_format(tmpdir):
    filename = tmpdir.join("external_account_bad.json")
    filename.write(json.dumps({"type": "external_account"}))

    with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
        _default.load_credentials_from_file(str(filename))

    assert excinfo.match(
        "Failed to load external account credentials from {}".format(str(filename))
    )


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_load_credentials_from_file_external_account_explicit_request(
    get_project_id, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IDENTITY_POOL_DATA))
    credentials, project_id = _default.load_credentials_from_file(
        str(config_file),
        request=mock.sentinel.request,
        scopes=["https://www.googleapis.com/auth/cloud-platform"],
    )

    assert isinstance(credentials, identity_pool.Credentials)
    # Since scopes are specified, the project ID can be determined.
    assert project_id is mock.sentinel.project_id
    get_project_id.assert_called_with(credentials, request=mock.sentinel.request)


@mock.patch.dict(os.environ, {}, clear=True)
def test__get_explicit_environ_credentials_no_env():
    assert _default._get_explicit_environ_credentials() == (None, None)


def test_load_credentials_from_file_external_account_authorized_user():
    credentials, project_id = _default.load_credentials_from_file(
        EXTERNAL_ACCOUNT_AUTHORIZED_USER_FILE, request=mock.sentinel.request
    )

    assert isinstance(credentials, external_account_authorized_user.Credentials)
    assert project_id is None


def test_load_credentials_from_file_external_account_authorized_user_bad_format(tmpdir):
    filename = tmpdir.join("external_account_authorized_user_bad.json")
    filename.write(json.dumps({"type": "external_account_authorized_user"}))

    with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
        _default.load_credentials_from_file(str(filename))

    assert excinfo.match(
        "Failed to load external account authorized user credentials from {}".format(
            str(filename)
        )
    )


@pytest.mark.parametrize("quota_project_id", [None, "project-foo"])
@LOAD_FILE_PATCH
def test__get_explicit_environ_credentials(load, quota_project_id, monkeypatch):
    monkeypatch.setenv(environment_vars.CREDENTIALS, "filename")

    credentials, project_id = _default._get_explicit_environ_credentials(
        quota_project_id=quota_project_id
    )

    assert credentials is MOCK_CREDENTIALS
    assert project_id is mock.sentinel.project_id
    load.assert_called_with("filename", quota_project_id=quota_project_id)


@LOAD_FILE_PATCH
def test__get_explicit_environ_credentials_no_project_id(load, monkeypatch):
    load.return_value = MOCK_CREDENTIALS, None
    monkeypatch.setenv(environment_vars.CREDENTIALS, "filename")

    credentials, project_id = _default._get_explicit_environ_credentials()

    assert credentials is MOCK_CREDENTIALS
    assert project_id is None


@pytest.mark.parametrize("quota_project_id", [None, "project-foo"])
@mock.patch(
    "google.auth._cloud_sdk.get_application_default_credentials_path", autospec=True
)
@mock.patch("google.auth._default._get_gcloud_sdk_credentials", autospec=True)
def test__get_explicit_environ_credentials_fallback_to_gcloud(
    get_gcloud_creds, get_adc_path, quota_project_id, monkeypatch
):
    # Set explicit credentials path to cloud sdk credentials path.
    get_adc_path.return_value = "filename"
    monkeypatch.setenv(environment_vars.CREDENTIALS, "filename")

    _default._get_explicit_environ_credentials(quota_project_id=quota_project_id)

    # Check we fall back to cloud sdk flow since explicit credentials path is
    # cloud sdk credentials path
    get_gcloud_creds.assert_called_with(quota_project_id=quota_project_id)


@pytest.mark.parametrize("quota_project_id", [None, "project-foo"])
@LOAD_FILE_PATCH
@mock.patch(
    "google.auth._cloud_sdk.get_application_default_credentials_path", autospec=True
)
def test__get_gcloud_sdk_credentials(get_adc_path, load, quota_project_id):
    get_adc_path.return_value = SERVICE_ACCOUNT_FILE

    credentials, project_id = _default._get_gcloud_sdk_credentials(
        quota_project_id=quota_project_id
    )

    assert credentials is MOCK_CREDENTIALS
    assert project_id is mock.sentinel.project_id
    load.assert_called_with(SERVICE_ACCOUNT_FILE, quota_project_id=quota_project_id)


@mock.patch(
    "google.auth._cloud_sdk.get_application_default_credentials_path", autospec=True
)
def test__get_gcloud_sdk_credentials_non_existent(get_adc_path, tmpdir):
    non_existent = tmpdir.join("non-existent")
    get_adc_path.return_value = str(non_existent)

    credentials, project_id = _default._get_gcloud_sdk_credentials()

    assert credentials is None
    assert project_id is None


@mock.patch(
    "google.auth._cloud_sdk.get_project_id",
    return_value=mock.sentinel.project_id,
    autospec=True,
)
@mock.patch("os.path.isfile", return_value=True, autospec=True)
@LOAD_FILE_PATCH
def test__get_gcloud_sdk_credentials_project_id(load, unused_isfile, get_project_id):
    # Don't return a project ID from load file, make the function check
    # the Cloud SDK project.
    load.return_value = MOCK_CREDENTIALS, None

    credentials, project_id = _default._get_gcloud_sdk_credentials()

    assert credentials == MOCK_CREDENTIALS
    assert project_id == mock.sentinel.project_id
    assert get_project_id.called


@mock.patch("google.auth._cloud_sdk.get_project_id", return_value=None, autospec=True)
@mock.patch("os.path.isfile", return_value=True)
@LOAD_FILE_PATCH
def test__get_gcloud_sdk_credentials_no_project_id(load, unused_isfile, get_project_id):
    # Don't return a project ID from load file, make the function check
    # the Cloud SDK project.
    load.return_value = MOCK_CREDENTIALS, None

    credentials, project_id = _default._get_gcloud_sdk_credentials()

    assert credentials == MOCK_CREDENTIALS
    assert project_id is None
    assert get_project_id.called


def test__get_gdch_service_account_credentials_invalid_format_version():
    with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
        _default._get_gdch_service_account_credentials(
            "file_name", {"format_version": "2"}
        )
    assert excinfo.match("Failed to load GDCH service account credentials")


class _AppIdentityModule(object):
    """The interface of the App Idenity app engine module.
    See https://cloud.google.com/appengine/docs/standard/python/refdocs\
    /google.appengine.api.app_identity.app_identity
    """

    def get_application_id(self):
        raise NotImplementedError()


@pytest.fixture
def app_identity(monkeypatch):
    """Mocks the app_identity module for google.auth.app_engine."""
    app_identity_module = mock.create_autospec(_AppIdentityModule, instance=True)
    monkeypatch.setattr(app_engine, "app_identity", app_identity_module)
    yield app_identity_module


@mock.patch.dict(os.environ)
def test__get_gae_credentials_gen1(app_identity):
    os.environ[environment_vars.LEGACY_APPENGINE_RUNTIME] = "python27"
    app_identity.get_application_id.return_value = mock.sentinel.project

    credentials, project_id = _default._get_gae_credentials()

    assert isinstance(credentials, app_engine.Credentials)
    assert project_id == mock.sentinel.project


@mock.patch.dict(os.environ)
def test__get_gae_credentials_gen2():
    os.environ["GAE_RUNTIME"] = "python37"
    credentials, project_id = _default._get_gae_credentials()
    assert credentials is None
    assert project_id is None


@mock.patch.dict(os.environ)
def test__get_gae_credentials_gen2_backwards_compat():
    # compat helpers may copy GAE_RUNTIME to APPENGINE_RUNTIME
    # for backwards compatibility with code that relies on it
    os.environ[environment_vars.LEGACY_APPENGINE_RUNTIME] = "python37"
    os.environ["GAE_RUNTIME"] = "python37"
    credentials, project_id = _default._get_gae_credentials()
    assert credentials is None
    assert project_id is None


def test__get_gae_credentials_env_unset():
    assert environment_vars.LEGACY_APPENGINE_RUNTIME not in os.environ
    assert "GAE_RUNTIME" not in os.environ
    credentials, project_id = _default._get_gae_credentials()
    assert credentials is None
    assert project_id is None


@mock.patch.dict(os.environ)
def test__get_gae_credentials_no_app_engine():
    # test both with and without LEGACY_APPENGINE_RUNTIME setting
    assert environment_vars.LEGACY_APPENGINE_RUNTIME not in os.environ

    import sys

    with mock.patch.dict(sys.modules, {"google.auth.app_engine": None}):
        credentials, project_id = _default._get_gae_credentials()
        assert credentials is None
        assert project_id is None

        os.environ[environment_vars.LEGACY_APPENGINE_RUNTIME] = "python27"
        credentials, project_id = _default._get_gae_credentials()
        assert credentials is None
        assert project_id is None


@mock.patch.dict(os.environ)
@mock.patch.object(app_engine, "app_identity", new=None)
def test__get_gae_credentials_no_apis():
    # test both with and without LEGACY_APPENGINE_RUNTIME setting
    assert environment_vars.LEGACY_APPENGINE_RUNTIME not in os.environ

    credentials, project_id = _default._get_gae_credentials()
    assert credentials is None
    assert project_id is None

    os.environ[environment_vars.LEGACY_APPENGINE_RUNTIME] = "python27"
    credentials, project_id = _default._get_gae_credentials()
    assert credentials is None
    assert project_id is None


@mock.patch(
    "google.auth.compute_engine._metadata.ping", return_value=True, autospec=True
)
@mock.patch(
    "google.auth.compute_engine._metadata.get_project_id",
    return_value="example-project",
    autospec=True,
)
def test__get_gce_credentials(unused_get, unused_ping):
    credentials, project_id = _default._get_gce_credentials()

    assert isinstance(credentials, compute_engine.Credentials)
    assert project_id == "example-project"


@mock.patch(
    "google.auth.compute_engine._metadata.ping", return_value=False, autospec=True
)
def test__get_gce_credentials_no_ping(unused_ping):
    credentials, project_id = _default._get_gce_credentials()

    assert credentials is None
    assert project_id is None


@mock.patch(
    "google.auth.compute_engine._metadata.ping", return_value=True, autospec=True
)
@mock.patch(
    "google.auth.compute_engine._metadata.get_project_id",
    side_effect=exceptions.TransportError(),
    autospec=True,
)
def test__get_gce_credentials_no_project_id(unused_get, unused_ping):
    credentials, project_id = _default._get_gce_credentials()

    assert isinstance(credentials, compute_engine.Credentials)
    assert project_id is None


def test__get_gce_credentials_no_compute_engine():
    import sys

    with mock.patch.dict("sys.modules"):
        sys.modules["google.auth.compute_engine"] = None
        credentials, project_id = _default._get_gce_credentials()
        assert credentials is None
        assert project_id is None


@mock.patch(
    "google.auth.compute_engine._metadata.ping", return_value=False, autospec=True
)
def test__get_gce_credentials_explicit_request(ping):
    _default._get_gce_credentials(mock.sentinel.request)
    ping.assert_called_with(request=mock.sentinel.request)


@mock.patch(
    "google.auth._default._get_explicit_environ_credentials",
    return_value=(MOCK_CREDENTIALS, mock.sentinel.project_id),
    autospec=True,
)
def test_default_early_out(unused_get):
    assert _default.default() == (MOCK_CREDENTIALS, mock.sentinel.project_id)


@mock.patch(
    "google.auth._default._get_explicit_environ_credentials",
    return_value=(MOCK_CREDENTIALS, mock.sentinel.project_id),
    autospec=True,
)
def test_default_explict_project_id(unused_get, monkeypatch):
    monkeypatch.setenv(environment_vars.PROJECT, "explicit-env")
    assert _default.default() == (MOCK_CREDENTIALS, "explicit-env")


@mock.patch(
    "google.auth._default._get_explicit_environ_credentials",
    return_value=(MOCK_CREDENTIALS, mock.sentinel.project_id),
    autospec=True,
)
def test_default_explict_legacy_project_id(unused_get, monkeypatch):
    monkeypatch.setenv(environment_vars.LEGACY_PROJECT, "explicit-env")
    assert _default.default() == (MOCK_CREDENTIALS, "explicit-env")


@mock.patch("logging.Logger.warning", autospec=True)
@mock.patch(
    "google.auth._default._get_explicit_environ_credentials",
    return_value=(MOCK_CREDENTIALS, None),
    autospec=True,
)
@mock.patch(
    "google.auth._default._get_gcloud_sdk_credentials",
    return_value=(MOCK_CREDENTIALS, None),
    autospec=True,
)
@mock.patch(
    "google.auth._default._get_gae_credentials",
    return_value=(MOCK_CREDENTIALS, None),
    autospec=True,
)
@mock.patch(
    "google.auth._default._get_gce_credentials",
    return_value=(MOCK_CREDENTIALS, None),
    autospec=True,
)
def test_default_without_project_id(
    unused_gce, unused_gae, unused_sdk, unused_explicit, logger_warning
):
    assert _default.default() == (MOCK_CREDENTIALS, None)
    logger_warning.assert_called_with(mock.ANY, mock.ANY, mock.ANY)


@mock.patch(
    "google.auth._default._get_explicit_environ_credentials",
    return_value=(None, None),
    autospec=True,
)
@mock.patch(
    "google.auth._default._get_gcloud_sdk_credentials",
    return_value=(None, None),
    autospec=True,
)
@mock.patch(
    "google.auth._default._get_gae_credentials",
    return_value=(None, None),
    autospec=True,
)
@mock.patch(
    "google.auth._default._get_gce_credentials",
    return_value=(None, None),
    autospec=True,
)
def test_default_fail(unused_gce, unused_gae, unused_sdk, unused_explicit):
    with pytest.raises(exceptions.DefaultCredentialsError):
        assert _default.default()


@mock.patch(
    "google.auth._default._get_explicit_environ_credentials",
    return_value=(MOCK_CREDENTIALS, mock.sentinel.project_id),
    autospec=True,
)
@mock.patch(
    "google.auth.credentials.with_scopes_if_required",
    return_value=MOCK_CREDENTIALS,
    autospec=True,
)
def test_default_scoped(with_scopes, unused_get):
    scopes = ["one", "two"]

    credentials, project_id = _default.default(scopes=scopes)

    assert credentials == with_scopes.return_value
    assert project_id == mock.sentinel.project_id
    with_scopes.assert_called_once_with(MOCK_CREDENTIALS, scopes, default_scopes=None)


@mock.patch(
    "google.auth._default._get_explicit_environ_credentials",
    return_value=(MOCK_CREDENTIALS, mock.sentinel.project_id),
    autospec=True,
)
def test_default_quota_project(with_quota_project):
    credentials, project_id = _default.default(quota_project_id="project-foo")

    MOCK_CREDENTIALS.with_quota_project.assert_called_once_with("project-foo")
    assert project_id == mock.sentinel.project_id


@mock.patch(
    "google.auth._default._get_explicit_environ_credentials",
    return_value=(MOCK_CREDENTIALS, mock.sentinel.project_id),
    autospec=True,
)
def test_default_no_app_engine_compute_engine_module(unused_get):
    """
    google.auth.compute_engine and google.auth.app_engine are both optional
    to allow not including them when using this package. This verifies
    that default fails gracefully if these modules are absent
    """
    import sys

    with mock.patch.dict("sys.modules"):
        sys.modules["google.auth.compute_engine"] = None
        sys.modules["google.auth.app_engine"] = None
        assert _default.default() == (MOCK_CREDENTIALS, mock.sentinel.project_id)


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_default_environ_external_credentials_identity_pool(
    get_project_id, monkeypatch, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IDENTITY_POOL_DATA))
    monkeypatch.setenv(environment_vars.CREDENTIALS, str(config_file))

    credentials, project_id = _default.default()

    assert isinstance(credentials, identity_pool.Credentials)
    assert not credentials.is_user
    assert not credentials.is_workforce_pool
    # Without scopes, project ID cannot be determined.
    assert project_id is None


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_default_environ_external_credentials_identity_pool_impersonated(
    get_project_id, monkeypatch, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IMPERSONATED_IDENTITY_POOL_DATA))
    monkeypatch.setenv(environment_vars.CREDENTIALS, str(config_file))

    credentials, project_id = _default.default(
        scopes=["https://www.google.com/calendar/feeds"]
    )

    assert isinstance(credentials, identity_pool.Credentials)
    assert not credentials.is_user
    assert not credentials.is_workforce_pool
    assert project_id is mock.sentinel.project_id
    assert credentials.scopes == ["https://www.google.com/calendar/feeds"]


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_default_environ_external_credentials_aws_impersonated(
    get_project_id, monkeypatch, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IMPERSONATED_AWS_DATA))
    monkeypatch.setenv(environment_vars.CREDENTIALS, str(config_file))

    credentials, project_id = _default.default(
        scopes=["https://www.google.com/calendar/feeds"]
    )

    assert isinstance(credentials, aws.Credentials)
    assert not credentials.is_user
    assert not credentials.is_workforce_pool
    assert project_id is mock.sentinel.project_id
    assert credentials.scopes == ["https://www.google.com/calendar/feeds"]


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_default_environ_external_credentials_workforce(
    get_project_id, monkeypatch, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IDENTITY_POOL_WORKFORCE_DATA))
    monkeypatch.setenv(environment_vars.CREDENTIALS, str(config_file))

    credentials, project_id = _default.default(
        scopes=["https://www.google.com/calendar/feeds"]
    )

    assert isinstance(credentials, identity_pool.Credentials)
    assert credentials.is_user
    assert credentials.is_workforce_pool
    assert project_id is mock.sentinel.project_id
    assert credentials.scopes == ["https://www.google.com/calendar/feeds"]


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_default_environ_external_credentials_workforce_impersonated(
    get_project_id, monkeypatch, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IMPERSONATED_IDENTITY_POOL_WORKFORCE_DATA))
    monkeypatch.setenv(environment_vars.CREDENTIALS, str(config_file))

    credentials, project_id = _default.default(
        scopes=["https://www.google.com/calendar/feeds"]
    )

    assert isinstance(credentials, identity_pool.Credentials)
    assert not credentials.is_user
    assert credentials.is_workforce_pool
    assert project_id is mock.sentinel.project_id
    assert credentials.scopes == ["https://www.google.com/calendar/feeds"]


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_default_environ_external_credentials_with_user_and_default_scopes_and_quota_project_id(
    get_project_id, monkeypatch, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IDENTITY_POOL_DATA))
    monkeypatch.setenv(environment_vars.CREDENTIALS, str(config_file))

    credentials, project_id = _default.default(
        scopes=["https://www.google.com/calendar/feeds"],
        default_scopes=["https://www.googleapis.com/auth/cloud-platform"],
        quota_project_id="project-foo",
    )

    assert isinstance(credentials, identity_pool.Credentials)
    assert project_id is mock.sentinel.project_id
    assert credentials.quota_project_id == "project-foo"
    assert credentials.scopes == ["https://www.google.com/calendar/feeds"]
    assert credentials.default_scopes == [
        "https://www.googleapis.com/auth/cloud-platform"
    ]


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_default_environ_external_credentials_explicit_request_with_scopes(
    get_project_id, monkeypatch, tmpdir
):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(IDENTITY_POOL_DATA))
    monkeypatch.setenv(environment_vars.CREDENTIALS, str(config_file))

    credentials, project_id = _default.default(
        request=mock.sentinel.request,
        scopes=["https://www.googleapis.com/auth/cloud-platform"],
    )

    assert isinstance(credentials, identity_pool.Credentials)
    assert project_id is mock.sentinel.project_id
    # default() will initialize new credentials via with_scopes_if_required
    # and potentially with_quota_project.
    # As a result the caller of get_project_id() will not match the returned
    # credentials.
    get_project_id.assert_called_with(mock.ANY, request=mock.sentinel.request)


def test_default_environ_external_credentials_bad_format(monkeypatch, tmpdir):
    filename = tmpdir.join("external_account_bad.json")
    filename.write(json.dumps({"type": "external_account"}))
    monkeypatch.setenv(environment_vars.CREDENTIALS, str(filename))

    with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
        _default.default()

    assert excinfo.match(
        "Failed to load external account credentials from {}".format(str(filename))
    )


@mock.patch(
    "google.auth._cloud_sdk.get_application_default_credentials_path", autospec=True
)
def test_default_warning_without_quota_project_id_for_user_creds(get_adc_path):
    get_adc_path.return_value = AUTHORIZED_USER_CLOUD_SDK_FILE

    with pytest.warns(UserWarning, match="Cloud SDK"):
        credentials, project_id = _default.default(quota_project_id=None)


@mock.patch(
    "google.auth._cloud_sdk.get_application_default_credentials_path", autospec=True
)
def test_default_no_warning_with_quota_project_id_for_user_creds(get_adc_path):
    get_adc_path.return_value = AUTHORIZED_USER_CLOUD_SDK_FILE

    credentials, project_id = _default.default(quota_project_id="project-foo")


@mock.patch(
    "google.auth._cloud_sdk.get_application_default_credentials_path", autospec=True
)
def test_default_impersonated_service_account(get_adc_path):
    get_adc_path.return_value = IMPERSONATED_SERVICE_ACCOUNT_AUTHORIZED_USER_SOURCE_FILE

    credentials, _ = _default.default()

    assert isinstance(credentials, impersonated_credentials.Credentials)
    assert isinstance(
        credentials._source_credentials, google.oauth2.credentials.Credentials
    )
    assert credentials.service_account_email == "[REDACTED_EMAIL]"
    assert credentials._delegates == ["[REDACTED_EMAIL]"]
    assert not credentials._quota_project_id
    assert not credentials._target_scopes


@mock.patch(
    "google.auth._cloud_sdk.get_application_default_credentials_path", autospec=True
)
def test_default_impersonated_service_account_set_scopes(get_adc_path):
    get_adc_path.return_value = IMPERSONATED_SERVICE_ACCOUNT_AUTHORIZED_USER_SOURCE_FILE
    scopes = ["scope1", "scope2"]

    credentials, _ = _default.default(scopes=scopes)
    assert credentials._target_scopes == scopes


@mock.patch(
    "google.auth._cloud_sdk.get_application_default_credentials_path", autospec=True
)
def test_default_impersonated_service_account_set_default_scopes(get_adc_path):
    get_adc_path.return_value = IMPERSONATED_SERVICE_ACCOUNT_AUTHORIZED_USER_SOURCE_FILE
    default_scopes = ["scope1", "scope2"]

    credentials, _ = _default.default(default_scopes=default_scopes)
    assert credentials._target_scopes == default_scopes


@mock.patch(
    "google.auth._cloud_sdk.get_application_default_credentials_path", autospec=True
)
def test_default_impersonated_service_account_set_both_scopes_and_default_scopes(
    get_adc_path
):
    get_adc_path.return_value = IMPERSONATED_SERVICE_ACCOUNT_AUTHORIZED_USER_SOURCE_FILE
    scopes = ["scope1", "scope2"]
    default_scopes = ["scope3", "scope4"]

    credentials, _ = _default.default(scopes=scopes, default_scopes=default_scopes)
    assert credentials._target_scopes == scopes


@EXTERNAL_ACCOUNT_GET_PROJECT_ID_PATCH
def test_load_credentials_from_external_account_pluggable(get_project_id, tmpdir):
    config_file = tmpdir.join("config.json")
    config_file.write(json.dumps(PLUGGABLE_DATA))
    credentials, project_id = _default.load_credentials_from_file(str(config_file))

    assert isinstance(credentials, pluggable.Credentials)
    # Since no scopes are specified, the project ID cannot be determined.
    assert project_id is None
    assert get_project_id.called


@mock.patch(
    "google.auth._cloud_sdk.get_application_default_credentials_path", autospec=True
)
def test_default_gdch_service_account_credentials(get_adc_path):
    get_adc_path.return_value = GDCH_SERVICE_ACCOUNT_FILE

    creds, project = _default.default(quota_project_id="project-foo")

    assert isinstance(creds, gdch_credentials.ServiceAccountCredentials)
    assert creds._service_identity_name == "service_identity_name"
    assert creds._audience is None
    assert creds._token_uri == "https://service-identity.<Domain>/authenticate"
    assert creds._ca_cert_path == "/path/to/ca/cert"
    assert project == "project_foo"


@mock.patch.dict(os.environ)
@mock.patch(
    "google.auth._cloud_sdk.get_application_default_credentials_path", autospec=True
)
def test_quota_project_from_environment(get_adc_path):
    get_adc_path.return_value = AUTHORIZED_USER_CLOUD_SDK_WITH_QUOTA_PROJECT_ID_FILE

    credentials, _ = _default.default(quota_project_id=None)
    assert credentials.quota_project_id == "quota_project_id"

    quota_from_env = "quota_from_env"
    os.environ[environment_vars.GOOGLE_CLOUD_QUOTA_PROJECT] = quota_from_env
    credentials, _ = _default.default(quota_project_id=None)
    assert credentials.quota_project_id == quota_from_env

    explicit_quota = "explicit_quota"
    credentials, _ = _default.default(quota_project_id=explicit_quota)
    assert credentials.quota_project_id == explicit_quota