# Copyright 2018 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
#
#     https://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.
"""Unit tests."""

import pytest

from google.cloud import tasks_v2beta2
from google.cloud.tasks_v2beta2.proto import cloudtasks_pb2
from google.cloud.tasks_v2beta2.proto import queue_pb2
from google.cloud.tasks_v2beta2.proto import task_pb2
from google.iam.v1 import iam_policy_pb2
from google.iam.v1 import policy_pb2
from google.protobuf import duration_pb2
from google.protobuf import empty_pb2
from google.protobuf import timestamp_pb2


class MultiCallableStub(object):
    """Stub for the grpc.UnaryUnaryMultiCallable interface."""

    def __init__(self, method, channel_stub):
        self.method = method
        self.channel_stub = channel_stub

    def __call__(self, request, timeout=None, metadata=None, credentials=None):
        self.channel_stub.requests.append((self.method, request))

        response = None
        if self.channel_stub.responses:
            response = self.channel_stub.responses.pop()

        if isinstance(response, Exception):
            raise response

        if response:
            return response


class ChannelStub(object):
    """Stub for the grpc.Channel interface."""

    def __init__(self, responses=[]):
        self.responses = responses
        self.requests = []

    def unary_unary(self,
                    method,
                    request_serializer=None,
                    response_deserializer=None):
        return MultiCallableStub(method, self)


class CustomException(Exception):
    pass


class TestCloudTasksClient(object):
    def test_list_queues(self):
        # Setup Expected Response
        next_page_token = ''
        queues_element = {}
        queues = [queues_element]
        expected_response = {
            'next_page_token': next_page_token,
            'queues': queues
        }
        expected_response = cloudtasks_pb2.ListQueuesResponse(
            **expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        parent = client.location_path('[PROJECT]', '[LOCATION]')

        paged_list_response = client.list_queues(parent)
        resources = list(paged_list_response)
        assert len(resources) == 1

        assert expected_response.queues[0] == resources[0]

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.ListQueuesRequest(parent=parent)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_list_queues_exception(self):
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        parent = client.location_path('[PROJECT]', '[LOCATION]')

        paged_list_response = client.list_queues(parent)
        with pytest.raises(CustomException):
            list(paged_list_response)

    def test_get_queue(self):
        # Setup Expected Response
        name_2 = 'name2-1052831874'
        expected_response = {'name': name_2}
        expected_response = queue_pb2.Queue(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        name = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        response = client.get_queue(name)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.GetQueueRequest(name=name)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_get_queue_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        name = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        with pytest.raises(CustomException):
            client.get_queue(name)

    def test_create_queue(self):
        # Setup Expected Response
        name = 'name3373707'
        expected_response = {'name': name}
        expected_response = queue_pb2.Queue(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        parent = client.location_path('[PROJECT]', '[LOCATION]')
        queue = {}

        response = client.create_queue(parent, queue)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.CreateQueueRequest(
            parent=parent, queue=queue)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_create_queue_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        parent = client.location_path('[PROJECT]', '[LOCATION]')
        queue = {}

        with pytest.raises(CustomException):
            client.create_queue(parent, queue)

    def test_update_queue(self):
        # Setup Expected Response
        name = 'name3373707'
        expected_response = {'name': name}
        expected_response = queue_pb2.Queue(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        queue = {}

        response = client.update_queue(queue)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.UpdateQueueRequest(queue=queue)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_update_queue_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        queue = {}

        with pytest.raises(CustomException):
            client.update_queue(queue)

    def test_delete_queue(self):
        channel = ChannelStub()
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        name = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        client.delete_queue(name)

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.DeleteQueueRequest(name=name)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_delete_queue_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        name = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        with pytest.raises(CustomException):
            client.delete_queue(name)

    def test_purge_queue(self):
        # Setup Expected Response
        name_2 = 'name2-1052831874'
        expected_response = {'name': name_2}
        expected_response = queue_pb2.Queue(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        name = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        response = client.purge_queue(name)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.PurgeQueueRequest(name=name)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_purge_queue_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        name = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        with pytest.raises(CustomException):
            client.purge_queue(name)

    def test_pause_queue(self):
        # Setup Expected Response
        name_2 = 'name2-1052831874'
        expected_response = {'name': name_2}
        expected_response = queue_pb2.Queue(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        name = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        response = client.pause_queue(name)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.PauseQueueRequest(name=name)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_pause_queue_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        name = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        with pytest.raises(CustomException):
            client.pause_queue(name)

    def test_resume_queue(self):
        # Setup Expected Response
        name_2 = 'name2-1052831874'
        expected_response = {'name': name_2}
        expected_response = queue_pb2.Queue(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        name = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        response = client.resume_queue(name)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.ResumeQueueRequest(name=name)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_resume_queue_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        name = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        with pytest.raises(CustomException):
            client.resume_queue(name)

    def test_get_iam_policy(self):
        # Setup Expected Response
        version = 351608024
        etag = b'21'
        expected_response = {'version': version, 'etag': etag}
        expected_response = policy_pb2.Policy(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        resource = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        response = client.get_iam_policy(resource)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = iam_policy_pb2.GetIamPolicyRequest(
            resource=resource)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_get_iam_policy_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        resource = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        with pytest.raises(CustomException):
            client.get_iam_policy(resource)

    def test_set_iam_policy(self):
        # Setup Expected Response
        version = 351608024
        etag = b'21'
        expected_response = {'version': version, 'etag': etag}
        expected_response = policy_pb2.Policy(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        resource = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')
        policy = {}

        response = client.set_iam_policy(resource, policy)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = iam_policy_pb2.SetIamPolicyRequest(
            resource=resource, policy=policy)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_set_iam_policy_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        resource = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')
        policy = {}

        with pytest.raises(CustomException):
            client.set_iam_policy(resource, policy)

    def test_test_iam_permissions(self):
        # Setup Expected Response
        expected_response = {}
        expected_response = iam_policy_pb2.TestIamPermissionsResponse(
            **expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        resource = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')
        permissions = []

        response = client.test_iam_permissions(resource, permissions)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = iam_policy_pb2.TestIamPermissionsRequest(
            resource=resource, permissions=permissions)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_test_iam_permissions_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        resource = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')
        permissions = []

        with pytest.raises(CustomException):
            client.test_iam_permissions(resource, permissions)

    def test_list_tasks(self):
        # Setup Expected Response
        next_page_token = ''
        tasks_element = {}
        tasks = [tasks_element]
        expected_response = {
            'next_page_token': next_page_token,
            'tasks': tasks
        }
        expected_response = cloudtasks_pb2.ListTasksResponse(
            **expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        parent = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        paged_list_response = client.list_tasks(parent)
        resources = list(paged_list_response)
        assert len(resources) == 1

        assert expected_response.tasks[0] == resources[0]

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.ListTasksRequest(parent=parent)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_list_tasks_exception(self):
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        parent = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')

        paged_list_response = client.list_tasks(parent)
        with pytest.raises(CustomException):
            list(paged_list_response)

    def test_get_task(self):
        # Setup Expected Response
        name_2 = 'name2-1052831874'
        expected_response = {'name': name_2}
        expected_response = task_pb2.Task(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        name = client.task_path('[PROJECT]', '[LOCATION]', '[QUEUE]', '[TASK]')

        response = client.get_task(name)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.GetTaskRequest(name=name)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_get_task_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        name = client.task_path('[PROJECT]', '[LOCATION]', '[QUEUE]', '[TASK]')

        with pytest.raises(CustomException):
            client.get_task(name)

    def test_create_task(self):
        # Setup Expected Response
        name = 'name3373707'
        expected_response = {'name': name}
        expected_response = task_pb2.Task(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        parent = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')
        task = {}

        response = client.create_task(parent, task)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.CreateTaskRequest(
            parent=parent, task=task)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_create_task_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        parent = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')
        task = {}

        with pytest.raises(CustomException):
            client.create_task(parent, task)

    def test_delete_task(self):
        channel = ChannelStub()
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        name = client.task_path('[PROJECT]', '[LOCATION]', '[QUEUE]', '[TASK]')

        client.delete_task(name)

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.DeleteTaskRequest(name=name)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_delete_task_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        name = client.task_path('[PROJECT]', '[LOCATION]', '[QUEUE]', '[TASK]')

        with pytest.raises(CustomException):
            client.delete_task(name)

    def test_lease_tasks(self):
        # Setup Expected Response
        expected_response = {}
        expected_response = cloudtasks_pb2.LeaseTasksResponse(
            **expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        parent = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')
        lease_duration = {}

        response = client.lease_tasks(parent, lease_duration)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.LeaseTasksRequest(
            parent=parent, lease_duration=lease_duration)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_lease_tasks_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        parent = client.queue_path('[PROJECT]', '[LOCATION]', '[QUEUE]')
        lease_duration = {}

        with pytest.raises(CustomException):
            client.lease_tasks(parent, lease_duration)

    def test_acknowledge_task(self):
        channel = ChannelStub()
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        name = client.task_path('[PROJECT]', '[LOCATION]', '[QUEUE]', '[TASK]')
        schedule_time = {}

        client.acknowledge_task(name, schedule_time)

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.AcknowledgeTaskRequest(
            name=name, schedule_time=schedule_time)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_acknowledge_task_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        name = client.task_path('[PROJECT]', '[LOCATION]', '[QUEUE]', '[TASK]')
        schedule_time = {}

        with pytest.raises(CustomException):
            client.acknowledge_task(name, schedule_time)

    def test_renew_lease(self):
        # Setup Expected Response
        name_2 = 'name2-1052831874'
        expected_response = {'name': name_2}
        expected_response = task_pb2.Task(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        name = client.task_path('[PROJECT]', '[LOCATION]', '[QUEUE]', '[TASK]')
        schedule_time = {}
        lease_duration = {}

        response = client.renew_lease(name, schedule_time, lease_duration)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.RenewLeaseRequest(
            name=name,
            schedule_time=schedule_time,
            lease_duration=lease_duration)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_renew_lease_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        name = client.task_path('[PROJECT]', '[LOCATION]', '[QUEUE]', '[TASK]')
        schedule_time = {}
        lease_duration = {}

        with pytest.raises(CustomException):
            client.renew_lease(name, schedule_time, lease_duration)

    def test_cancel_lease(self):
        # Setup Expected Response
        name_2 = 'name2-1052831874'
        expected_response = {'name': name_2}
        expected_response = task_pb2.Task(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        name = client.task_path('[PROJECT]', '[LOCATION]', '[QUEUE]', '[TASK]')
        schedule_time = {}

        response = client.cancel_lease(name, schedule_time)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.CancelLeaseRequest(
            name=name, schedule_time=schedule_time)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_cancel_lease_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        name = client.task_path('[PROJECT]', '[LOCATION]', '[QUEUE]', '[TASK]')
        schedule_time = {}

        with pytest.raises(CustomException):
            client.cancel_lease(name, schedule_time)

    def test_run_task(self):
        # Setup Expected Response
        name_2 = 'name2-1052831874'
        expected_response = {'name': name_2}
        expected_response = task_pb2.Task(**expected_response)

        # Mock the API response
        channel = ChannelStub(responses=[expected_response])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup Request
        name = client.task_path('[PROJECT]', '[LOCATION]', '[QUEUE]', '[TASK]')

        response = client.run_task(name)
        assert expected_response == response

        assert len(channel.requests) == 1
        expected_request = cloudtasks_pb2.RunTaskRequest(name=name)
        actual_request = channel.requests[0][1]
        assert expected_request == actual_request

    def test_run_task_exception(self):
        # Mock the API response
        channel = ChannelStub(responses=[CustomException()])
        client = tasks_v2beta2.CloudTasksClient(channel=channel)

        # Setup request
        name = client.task_path('[PROJECT]', '[LOCATION]', '[QUEUE]', '[TASK]')

        with pytest.raises(CustomException):
            client.run_task(name)
