from typing import Dict, Any, Optional, Iterable, Callable, Set, List

import json
import os
import sys
from functools import wraps

from zerver.lib import mdiff
from zerver.openapi.openapi import validate_against_openapi_schema

from zerver.models import get_realm, get_user

from zulip import Client

ZULIP_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

TEST_FUNCTIONS: Dict[str, Callable[..., None]] = dict()
REGISTERED_TEST_FUNCTIONS: Set[str] = set()
CALLED_TEST_FUNCTIONS: Set[str] = set()

def openapi_test_function(endpoint: str) -> Callable[[Callable[..., Any]], Callable[..., Any]]:
    """This decorator is used to register an openapi test function with
    its endpoint. Example usage:

    @openapi_test_function("/messages/render:post")
    def ...
    """
    def wrapper(test_func: Callable[..., Any]) -> Callable[..., Any]:
        @wraps(test_func)
        def _record_calls_wrapper(*args: Any, **kwargs: Any) -> Any:
            CALLED_TEST_FUNCTIONS.add(test_func.__name__)
            return test_func(*args, **kwargs)

        REGISTERED_TEST_FUNCTIONS.add(test_func.__name__)
        TEST_FUNCTIONS[endpoint] = _record_calls_wrapper

        return _record_calls_wrapper
    return wrapper

def ensure_users(ids_list: List[int], user_names: List[str]) -> None:
    # Ensure that the list of user ids (ids_list)
    # matches the users we want to refer to (user_names).
    realm = get_realm("zulip")
    user_ids = [get_user(name + '@zulip.com', realm).id for name in user_names]

    assert ids_list == user_ids

@openapi_test_function("/users/me/subscriptions:post")
def add_subscriptions(client: Client) -> None:

    # {code_example|start}
    # Subscribe to the stream "new stream"
    result = client.add_subscriptions(
        streams=[
            {
                'name': 'new stream',
                'description': 'New stream for testing'
            }
        ]
    )
    # {code_example|end}

    validate_against_openapi_schema(result, '/users/me/subscriptions', 'post',
                                    '200_0')

    # {code_example|start}
    # To subscribe another user to a stream, you may pass in
    # the `principals` argument, like so:
    result = client.add_subscriptions(
        streams=[
            {'name': 'new stream', 'description': 'New stream for testing'}
        ],
        principals=['newbie@zulip.com']
    )
    # {code_example|end}
    assert result['result'] == 'success'
    assert 'newbie@zulip.com' in result['subscribed']

def test_add_subscriptions_already_subscribed(client: Client) -> None:
    result = client.add_subscriptions(
        streams=[
            {'name': 'new stream', 'description': 'New stream for testing'}
        ],
        principals=['newbie@zulip.com']
    )

    validate_against_openapi_schema(result, '/users/me/subscriptions', 'post',
                                    '200_1')

def test_authorization_errors_fatal(client: Client, nonadmin_client: Client) -> None:
    client.add_subscriptions(
        streams=[
            {'name': 'private_stream'}
        ],
    )

    stream_id = client.get_stream_id('private_stream')['stream_id']
    client.call_endpoint(
        'streams/{}'.format(stream_id),
        method='PATCH',
        request={'is_private': True}
    )

    result = nonadmin_client.add_subscriptions(
        streams=[
            {'name': 'private_stream'}
        ],
        authorization_errors_fatal=False,
    )

    validate_against_openapi_schema(result, '/users/me/subscriptions', 'post',
                                    '400_0')

    result = nonadmin_client.add_subscriptions(
        streams=[
            {'name': 'private_stream'}
        ],
        authorization_errors_fatal=True,
    )

    validate_against_openapi_schema(result, '/users/me/subscriptions', 'post',
                                    '400_1')

@openapi_test_function("/users/{email}/presence:get")
def get_user_presence(client: Client) -> None:

    # {code_example|start}
    # Get presence information for "iago@zulip.com"
    result = client.get_user_presence('iago@zulip.com')
    # {code_example|end}

    validate_against_openapi_schema(result, '/users/{email}/presence', 'get', '200')

@openapi_test_function("/users/me/presence:post")
def update_presence(client: Client) -> None:
    request = {
        'status': 'active',
        'ping_only': False,
        'new_user_input': False
    }

    result = client.update_presence(request)

    assert result['result'] == 'success'

@openapi_test_function("/users:post")
def create_user(client: Client) -> None:

    # {code_example|start}
    # Create a user
    request = {
        'email': 'newbie@zulip.com',
        'password': 'temp',
        'full_name': 'New User',
        'short_name': 'newbie'
    }
    result = client.create_user(request)
    # {code_example|end}

    validate_against_openapi_schema(result, '/users', 'post', '200')

    # Test "Email already used error"
    result = client.create_user(request)

    validate_against_openapi_schema(result, '/users', 'post', '400')

@openapi_test_function("/users:get")
def get_members(client: Client) -> None:

    # {code_example|start}
    # Get all users in the realm
    result = client.get_members()
    # {code_example|end}

    validate_against_openapi_schema(result, '/users', 'get', '200')

    members = [m for m in result['members'] if m['email'] == 'newbie@zulip.com']
    assert len(members) == 1
    newbie = members[0]
    assert not newbie['is_admin']
    assert newbie['full_name'] == 'New User'

    # {code_example|start}
    # You may pass the `client_gravatar` query parameter as follows:
    result = client.get_members({'client_gravatar': True})
    # {code_example|end}

    validate_against_openapi_schema(result, '/users', 'get', '200')
    assert result['members'][0]['avatar_url'] is None

    # {code_example|start}
    # You may pass the `include_custom_profile_fields` query parameter as follows:
    result = client.get_members({'include_custom_profile_fields': True})
    # {code_example|end}

    validate_against_openapi_schema(result, '/users', 'get', '200')
    for member in result['members']:
        if member["is_bot"]:
            assert member.get('profile_data', None) is None
        else:
            assert member.get('profile_data', None) is not None

@openapi_test_function("/users/{user_id}:get")
def get_single_user(client: Client) -> None:

    # {code_example|start}
    # Fetch details on a user given a user ID
    user_id = 8
    result = client.get_user_by_id(user_id)
    # {code_example|end}
    validate_against_openapi_schema(result, '/users/{user_id}', 'get', '200')

    # {code_example|start}
    # If you'd like data on custom profile fields, you can request them as follows:
    result = client.get_user_by_id(user_id, include_custom_profile_fields=True)
    # {code_example|end}
    validate_against_openapi_schema(result, '/users/{user_id}', 'get', '200')

@openapi_test_function("/users/{user_id}:delete")
def deactivate_user(client: Client) -> None:

    # {code_example|start}
    # Deactivate a user
    user_id = 8
    result = client.deactivate_user_by_id(user_id)
    # {code_example|end}
    validate_against_openapi_schema(result, '/users/{user_id}', 'delete', '200')

@openapi_test_function("/users/{user_id}/reactivate:post")
def reactivate_user(client: Client) -> None:
    # {code_example|start}
    # Reactivate a user
    user_id = 8
    result = client.reactivate_user_by_id(user_id)
    # {code_example|end}
    validate_against_openapi_schema(result, '/users/{user_id}/reactivate', 'post', '200')

@openapi_test_function("/users/{user_id}:patch")
def update_user(client: Client) -> None:

    # {code_example|start}
    # Change a user's full name.
    user_id = 10
    result = client.update_user_by_id(user_id, full_name = "New Name")
    # {code_example|end}
    validate_against_openapi_schema(result, '/users/{user_id}', 'patch', '200')

    # {code_example|start}
    # Change value of the custom profile field with ID 9.
    user_id = 8
    result = client.update_user_by_id(user_id, profile_data = [{'id': 9, 'value': 'some data'}])
    # {code_example|end}
    validate_against_openapi_schema(result, '/users/{user_id}', 'patch', '400')

@openapi_test_function("/realm/filters:get")
def get_realm_filters(client: Client) -> None:

    # {code_example|start}
    # Fetch all the filters in this organization
    result = client.get_realm_filters()
    # {code_example|end}

    validate_against_openapi_schema(result, '/realm/filters', 'get', '200')

@openapi_test_function("/realm/filters:post")
def add_realm_filter(client: Client) -> None:

    # {code_example|start}
    # Add a filter to automatically linkify #<number> to the corresponding
    # issue in Zulip's server repo
    result = client.add_realm_filter('#(?P<id>[0-9]+)',
                                     'https://github.com/zulip/zulip/issues/%(id)s')
    # {code_example|end}

    validate_against_openapi_schema(result, '/realm/filters', 'post', '200')

@openapi_test_function("/realm/filters/{filter_id}:delete")
def remove_realm_filter(client: Client) -> None:

    # {code_example|start}
    # Remove the organization filter with ID 42
    result = client.remove_realm_filter(42)
    # {code_example|end}

    validate_against_openapi_schema(result, '/realm/filters/{filter_id}', 'delete', '200')

@openapi_test_function("/users/me:get")
def get_profile(client: Client) -> None:

    # {code_example|start}
    # Get the profile of the user/bot that requests this endpoint,
    # which is `client` in this case:
    result = client.get_profile()
    # {code_example|end}

    validate_against_openapi_schema(result, '/users/me', 'get', '200')

@openapi_test_function("/get_stream_id:get")
def get_stream_id(client: Client) -> int:

    # {code_example|start}
    # Get the ID of a given stream
    stream_name = 'new stream'
    result = client.get_stream_id(stream_name)
    # {code_example|end}

    validate_against_openapi_schema(result, '/get_stream_id', 'get', '200')

    return result['stream_id']

@openapi_test_function("/streams/{stream_id}:delete")
def delete_stream(client: Client, stream_id: int) -> None:
    result = client.add_subscriptions(
        streams=[
            {
                'name': 'stream to be deleted',
                'description': 'New stream for testing'
            }
        ]
    )

    # {code_example|start}
    # Delete the stream named 'new stream'
    stream_id = client.get_stream_id('stream to be deleted')['stream_id']
    result = client.delete_stream(stream_id)
    # {code_example|end}
    validate_against_openapi_schema(result, '/streams/{stream_id}', 'delete', '200')

    assert result['result'] == 'success'

@openapi_test_function("/streams:get")
def get_streams(client: Client) -> None:

    # {code_example|start}
    # Get all streams that the user has access to
    result = client.get_streams()
    # {code_example|end}

    validate_against_openapi_schema(result, '/streams', 'get', '200')
    streams = [s for s in result['streams'] if s['name'] == 'new stream']
    assert streams[0]['description'] == 'New stream for testing'

    # {code_example|start}
    # You may pass in one or more of the query parameters mentioned above
    # as keyword arguments, like so:
    result = client.get_streams(include_public=False)
    # {code_example|end}

    validate_against_openapi_schema(result, '/streams', 'get', '200')
    assert len(result['streams']) == 4

@openapi_test_function("/streams/{stream_id}:patch")
def update_stream(client: Client, stream_id: int) -> None:

    # {code_example|start}
    # Update the stream by a given ID
    request = {
        'stream_id': stream_id,
        'stream_post_policy': 2,
        'is_private': True,
    }

    result = client.update_stream(request)
    # {code_example|end}

    validate_against_openapi_schema(result, '/streams/{stream_id}', 'patch', '200')
    assert result['result'] == 'success'

@openapi_test_function("/user_groups:get")
def get_user_groups(client: Client) -> int:

    # {code_example|start}
    # Get all user groups of the realm
    result = client.get_user_groups()
    # {code_example|end}

    validate_against_openapi_schema(result, '/user_groups', 'get', '200')
    hamlet_user_group = [u for u in result['user_groups']
                         if u['name'] == "hamletcharacters"][0]
    assert hamlet_user_group['description'] == 'Characters of Hamlet'

    marketing_user_group = [u for u in result['user_groups']
                            if u['name'] == "marketing"][0]
    return marketing_user_group['id']

def test_user_not_authorized_error(nonadmin_client: Client) -> None:
    result = nonadmin_client.get_streams(include_all_active=True)

    validate_against_openapi_schema(result, '/rest-error-handling', 'post', '400_2')

def get_subscribers(client: Client) -> None:

    result = client.get_subscribers(stream='new stream')
    assert result['subscribers'] == ['iago@zulip.com', 'newbie@zulip.com']

def get_user_agent(client: Client) -> None:

    result = client.get_user_agent()
    assert result.startswith('ZulipPython/')

@openapi_test_function("/users/me/subscriptions:get")
def list_subscriptions(client: Client) -> None:
    # {code_example|start}
    # Get all streams that the user is subscribed to
    result = client.list_subscriptions()
    # {code_example|end}

    validate_against_openapi_schema(result, '/users/me/subscriptions',
                                    'get', '200')

    streams = [s for s in result['subscriptions'] if s['name'] == 'new stream']
    assert streams[0]['description'] == 'New stream for testing'

@openapi_test_function("/users/me/subscriptions:delete")
def remove_subscriptions(client: Client) -> None:

    # {code_example|start}
    # Unsubscribe from the stream "new stream"
    result = client.remove_subscriptions(
        ['new stream']
    )
    # {code_example|end}

    validate_against_openapi_schema(result, '/users/me/subscriptions',
                                    'delete', '200')

    # test it was actually removed
    result = client.list_subscriptions()
    assert result['result'] == 'success'
    streams = [s for s in result['subscriptions'] if s['name'] == 'new stream']
    assert len(streams) == 0

    # {code_example|start}
    # Unsubscribe another user from the stream "new stream"
    result = client.remove_subscriptions(
        ['new stream'],
        principals=['newbie@zulip.com']
    )
    # {code_example|end}

    validate_against_openapi_schema(result, '/users/me/subscriptions',
                                    'delete', '200')

@openapi_test_function("/users/me/subscriptions/muted_topics:patch")
def toggle_mute_topic(client: Client) -> None:

    # Send a test message
    message = {
        'type': 'stream',
        'to': 'Denmark',
        'topic': 'boat party'
    }
    client.call_endpoint(
        url='messages',
        method='POST',
        request=message
    )

    # {code_example|start}
    # Mute the topic "boat party" in the stream "Denmark"
    request = {
        'stream': 'Denmark',
        'topic': 'boat party',
        'op': 'add'
    }
    result = client.mute_topic(request)
    # {code_example|end}

    validate_against_openapi_schema(result,
                                    '/users/me/subscriptions/muted_topics',
                                    'patch', '200')

    # {code_example|start}
    # Unmute the topic "boat party" in the stream "Denmark"
    request = {
        'stream': 'Denmark',
        'topic': 'boat party',
        'op': 'remove'
    }

    result = client.mute_topic(request)
    # {code_example|end}

    validate_against_openapi_schema(result,
                                    '/users/me/subscriptions/muted_topics',
                                    'patch', '200')

@openapi_test_function("/mark_all_as_read:post")
def mark_all_as_read(client: Client) -> None:

    # {code_example|start}
    # Mark all of the user's unread messages as read
    result = client.mark_all_as_read()
    # {code_example|end}

    validate_against_openapi_schema(result, '/mark_all_as_read', 'post', '200')

@openapi_test_function("/mark_stream_as_read:post")
def mark_stream_as_read(client: Client) -> None:

    # {code_example|start}
    # Mark the unread messages in stream with ID "1" as read
    result = client.mark_stream_as_read(1)
    # {code_example|end}

    validate_against_openapi_schema(result, '/mark_stream_as_read', 'post', '200')

@openapi_test_function("/mark_topic_as_read:post")
def mark_topic_as_read(client: Client) -> None:

    # Grab an existing topic name
    topic_name = client.get_stream_topics(1)['topics'][0]['name']

    # {code_example|start}
    # Mark the unread messages in stream 1's topic "topic_name" as read
    result = client.mark_topic_as_read(1, topic_name)
    # {code_example|end}

    validate_against_openapi_schema(result, '/mark_stream_as_read', 'post', '200')

@openapi_test_function("/users/me/subscriptions/properties:post")
def update_subscription_settings(client: Client) -> None:

    # {code_example|start}
    # Update the user's subscription in stream #1 to pin it to the top of the
    # stream list; and in stream #3 to have the hex color "f00"
    request = [{
        'stream_id': 1,
        'property': 'pin_to_top',
        'value': True
    }, {
        'stream_id': 3,
        'property': 'color',
        'value': 'f00'
    }]
    result = client.update_subscription_settings(request)
    # {code_example|end}

    validate_against_openapi_schema(result,
                                    '/users/me/subscriptions/properties',
                                    'POST', '200')

@openapi_test_function("/messages/render:post")
def render_message(client: Client) -> None:

    # {code_example|start}
    # Render a message
    request = {
        'content': '**foo**'
    }
    result = client.render_message(request)
    # {code_example|end}

    validate_against_openapi_schema(result, '/messages/render', 'post', '200')

@openapi_test_function("/messages:get")
def get_messages(client: Client) -> None:

    # {code_example|start}
    # Get the 100 last messages sent by "iago@zulip.com" to the stream "Verona"
    request: Dict[str, Any] = {
        'anchor': 'newest',
        'num_before': 100,
        'num_after': 0,
        'narrow': [{'operator': 'sender', 'operand': 'iago@zulip.com'},
                   {'operator': 'stream', 'operand': 'Verona'}],
    }
    result = client.get_messages(request)
    # {code_example|end}

    validate_against_openapi_schema(result, '/messages', 'get', '200')
    assert len(result['messages']) <= request['num_before']

@openapi_test_function("/messages/{message_id}:get")
def get_raw_message(client: Client, message_id: int) -> None:

    assert int(message_id)

    # {code_example|start}
    # Get the raw content of the message with ID "message_id"
    result = client.get_raw_message(message_id)
    # {code_example|end}

    validate_against_openapi_schema(result, '/messages/{message_id}', 'get',
                                    '200')

@openapi_test_function("/messages:post")
def send_message(client: Client) -> int:

    request: Dict[str, Any] = {}

    # {code_example|start}
    # Send a stream message
    request = {
        "type": "stream",
        "to": "Denmark",
        "topic": "Castle",
        "content": "I come not, friends, to steal away your hearts."
    }
    result = client.send_message(request)
    # {code_example|end}

    validate_against_openapi_schema(result, '/messages', 'post', '200')

    # test that the message was actually sent
    message_id = result['id']
    url = 'messages/' + str(message_id)
    result = client.call_endpoint(
        url=url,
        method='GET'
    )
    assert result['result'] == 'success'
    assert result['raw_content'] == request['content']

    ensure_users([10], ['hamlet'])

    # {code_example|start}
    # Send a private message
    user_id = 10
    request = {
        "type": "private",
        "to": [user_id],
        "content": "With mirth and laughter let old wrinkles come."
    }
    result = client.send_message(request)
    # {code_example|end}

    validate_against_openapi_schema(result, '/messages', 'post', '200')

    # test that the message was actually sent
    message_id = result['id']
    url = 'messages/' + str(message_id)
    result = client.call_endpoint(
        url=url,
        method='GET'
    )
    assert result['result'] == 'success'
    assert result['raw_content'] == request['content']

    return message_id

@openapi_test_function("/messages/{message_id}/reactions:post")
def add_reaction(client: Client, message_id: int) -> None:
    # {code_example|start}
    # Add an emoji reaction
    request = {
        'message_id': str(message_id),
        'emoji_name': 'octopus',
    }

    result = client.add_reaction(request)
    # {code_example|end}
    validate_against_openapi_schema(result, '/messages/{message_id}/reactions', 'post', '200')

@openapi_test_function("/messages/{message_id}/reactions:delete")
def remove_reaction(client: Client, message_id: int) -> None:
    # {code_example|start}
    # Remove an emoji reaction
    request = {
        'message_id': str(message_id),
        'emoji_name': 'octopus',
    }

    result = client.remove_reaction(request)
    # {code_example|end}
    validate_against_openapi_schema(result, '/messages/{message_id}/reactions', 'delete', '200')

def test_nonexistent_stream_error(client: Client) -> None:
    request = {
        "type": "stream",
        "to": "nonexistent_stream",
        "topic": "Castle",
        "content": "I come not, friends, to steal away your hearts."
    }
    result = client.send_message(request)

    validate_against_openapi_schema(result, '/messages', 'post',
                                    '400_0')

def test_private_message_invalid_recipient(client: Client) -> None:
    request = {
        "type": "private",
        "to": "eeshan@zulip.com",
        "content": "With mirth and laughter let old wrinkles come."
    }
    result = client.send_message(request)

    validate_against_openapi_schema(result, '/messages', 'post',
                                    '400_1')

@openapi_test_function("/messages/{message_id}:patch")
def update_message(client: Client, message_id: int) -> None:

    assert int(message_id)

    # {code_example|start}
    # Edit a message
    # (make sure that message_id below is set to the ID of the
    # message you wish to update)
    request = {
        "message_id": message_id,
        "content": "New content"
    }
    result = client.update_message(request)
    # {code_example|end}

    validate_against_openapi_schema(result, '/messages/{message_id}', 'patch',
                                    '200')

    # test it was actually updated
    url = 'messages/' + str(message_id)
    result = client.call_endpoint(
        url=url,
        method='GET'
    )
    assert result['result'] == 'success'
    assert result['raw_content'] == request['content']

def test_update_message_edit_permission_error(client: Client, nonadmin_client: Client) -> None:
    request = {
        "type": "stream",
        "to": "Denmark",
        "topic": "Castle",
        "content": "I come not, friends, to steal away your hearts."
    }
    result = client.send_message(request)

    request = {
        "message_id": result["id"],
        "content": "New content"
    }
    result = nonadmin_client.update_message(request)

    validate_against_openapi_schema(result, '/messages/{message_id}', 'patch', '400')

@openapi_test_function("/messages/{message_id}:delete")
def delete_message(client: Client, message_id: int) -> None:

    # {code_example|start}
    # Delete the message with ID "message_id"
    result = client.delete_message(message_id)
    # {code_example|end}

    validate_against_openapi_schema(result, '/messages/{message_id}', 'delete',
                                    '200')

def test_delete_message_edit_permission_error(client: Client, nonadmin_client: Client) -> None:
    request = {
        "type": "stream",
        "to": "Denmark",
        "topic": "Castle",
        "content": "I come not, friends, to steal away your hearts."
    }
    result = client.send_message(request)

    result = nonadmin_client.delete_message(result['id'])

    validate_against_openapi_schema(result, '/messages/{message_id}', 'delete',
                                    '400_1')

@openapi_test_function("/messages/{message_id}/history:get")
def get_message_history(client: Client, message_id: int) -> None:

    # {code_example|start}
    # Get the edit history for message with ID "message_id"
    result = client.get_message_history(message_id)
    # {code_example|end}

    validate_against_openapi_schema(result, '/messages/{message_id}/history',
                                    'get', '200')

@openapi_test_function("/realm/emoji:get")
def get_realm_emoji(client: Client) -> None:

    # {code_example|start}
    result = client.get_realm_emoji()
    # {code_example|end}

    validate_against_openapi_schema(result, '/realm/emoji', 'GET', '200')

@openapi_test_function("/messages/flags:post")
def update_message_flags(client: Client) -> None:

    # Send a few test messages
    request: Dict[str, Any] = {
        "type": "stream",
        "to": "Denmark",
        "topic": "Castle",
        "content": "I come not, friends, to steal away your hearts."
    }
    message_ids = []
    for i in range(0, 3):
        message_ids.append(client.send_message(request)['id'])

    # {code_example|start}
    # Add the "read" flag to the messages with IDs in "message_ids"
    request = {
        'messages': message_ids,
        'op': 'add',
        'flag': 'read'
    }
    result = client.update_message_flags(request)
    # {code_example|end}

    validate_against_openapi_schema(result, '/messages/flags', 'post',
                                    '200')

    # {code_example|start}
    # Remove the "starred" flag from the messages with IDs in "message_ids"
    request = {
        'messages': message_ids,
        'op': 'remove',
        'flag': 'starred'
    }
    result = client.update_message_flags(request)
    # {code_example|end}

    validate_against_openapi_schema(result, '/messages/flags', 'post',
                                    '200')

@openapi_test_function("/register:post")
def register_queue(client: Client) -> str:

    # {code_example|start}
    # Register the queue
    result = client.register(
        event_types=['message', 'realm_emoji']
    )
    # {code_example|end}

    validate_against_openapi_schema(result, '/register', 'post', '200')
    return result['queue_id']

@openapi_test_function("/events:delete")
def deregister_queue(client: Client, queue_id: str) -> None:

    # {code_example|start}
    # Delete a queue (queue_id is the ID of the queue
    # to be removed)
    result = client.deregister(queue_id)
    # {code_example|end}

    validate_against_openapi_schema(result, '/events', 'delete', '200')

    # Test "BAD_EVENT_QUEUE_ID" error
    result = client.deregister(queue_id)
    validate_against_openapi_schema(result, '/events', 'delete', '400')

@openapi_test_function("/server_settings:get")
def get_server_settings(client: Client) -> None:

    # {code_example|start}
    # Fetch the settings for this server
    result = client.get_server_settings()
    # {code_example|end}

    validate_against_openapi_schema(result, '/server_settings', 'get', '200')

@openapi_test_function("/settings/notifications:patch")
def update_notification_settings(client: Client) -> None:

    # {code_example|start}
    # Enable push notifications even when online
    request = {
        'enable_offline_push_notifications': True,
        'enable_online_push_notifications': True,
    }
    result = client.update_notification_settings(request)
    # {code_example|end}

    validate_against_openapi_schema(result, '/settings/notifications', 'patch', '200')

@openapi_test_function("/user_uploads:post")
def upload_file(client: Client) -> None:
    path_to_file = os.path.join(ZULIP_DIR, 'zerver', 'tests', 'images', 'img.jpg')

    # {code_example|start}
    # Upload a file
    with open(path_to_file, 'rb') as fp:
        result = client.call_endpoint(
            'user_uploads',
            method='POST',
            files=[fp]
        )

    client.send_message({
        "type": "stream",
        "to": "Denmark",
        "topic": "Castle",
        "content": "Check out [this picture](%s) of my castle!" % (result['uri'],)
    })
    # {code_example|end}

    validate_against_openapi_schema(result, '/user_uploads', 'post', '200')

@openapi_test_function("/users/me/{stream_id}/topics:get")
def get_stream_topics(client: Client, stream_id: int) -> None:

    # {code_example|start}
    result = client.get_stream_topics(stream_id)
    # {code_example|end}

    validate_against_openapi_schema(result, '/users/me/{stream_id}/topics',
                                    'get', '200')

@openapi_test_function("/typing:post")
def set_typing_status(client: Client) -> None:
    ensure_users([10, 11], ['hamlet', 'iago'])

    # {code_example|start}
    # The user has started to type in the group PM with Iago and Polonius
    user_id1 = 10
    user_id2 = 11

    request = {
        'op': 'start',
        'to': [user_id1, user_id2],
    }
    result = client.set_typing_status(request)
    # {code_example|end}

    validate_against_openapi_schema(result, '/typing', 'post', '200')

    # {code_example|start}
    # The user has finished typing in the group PM with Iago and Polonius
    user_id1 = 10
    user_id2 = 11

    request = {
        'op': 'stop',
        'to': [user_id1, user_id2],
    }
    result = client.set_typing_status(request)
    # {code_example|end}

    validate_against_openapi_schema(result, '/typing', 'post', '200')

@openapi_test_function("/realm/emoji/{emoji_name}:post")
def upload_custom_emoji(client: Client) -> None:
    emoji_path = os.path.join(ZULIP_DIR, 'zerver', 'tests', 'images', 'img.jpg')

    # {code_example|start}
    # Upload a custom emoji; assume `emoji_path` is the path to your image.
    with open(emoji_path, 'rb') as fp:
        emoji_name = 'my_custom_emoji'
        result = client.call_endpoint(
            'realm/emoji/{}'.format(emoji_name),
            method='POST',
            files=[fp]
        )
    # {code_example|end}

    validate_against_openapi_schema(result,
                                    '/realm/emoji/{emoji_name}',
                                    'post', '200')

@openapi_test_function("/users/me/alert_words:get")
def get_alert_words(client: Client) -> None:
    result = client.get_alert_words()

    assert result['result'] == 'success'

@openapi_test_function("/users/me/alert_words:post")
def add_alert_words(client: Client) -> None:
    word = ['foo', 'bar']

    result = client.add_alert_words(word)

    assert result['result'] == 'success'

@openapi_test_function("/users/me/alert_words:delete")
def remove_alert_words(client: Client) -> None:
    word = ['foo']

    result = client.remove_alert_words(word)

    assert result['result'] == 'success'

@openapi_test_function("/user_groups/create:post")
def create_user_group(client: Client) -> None:
    ensure_users([6, 7, 8, 10], ['aaron', 'zoe', 'cordelia', 'hamlet'])

    # {code_example|start}
    request = {
        'name': 'marketing',
        'description': 'The marketing team.',
        'members': [6, 7, 8, 10],
    }

    result = client.create_user_group(request)
    # {code_example|end}
    validate_against_openapi_schema(result, '/user_groups/create', 'post', '200')

    assert result['result'] == 'success'

@openapi_test_function("/user_groups/{group_id}:patch")
def update_user_group(client: Client, group_id: int) -> None:
    # {code_example|start}
    request = {
        'group_id': group_id,
        'name': 'marketing',
        'description': 'The marketing team.',
    }

    result = client.update_user_group(request)
    # {code_example|end}
    assert result['result'] == 'success'

@openapi_test_function("/user_groups/{group_id}:delete")
def remove_user_group(client: Client, group_id: int) -> None:
    # {code_example|start}
    result = client.remove_user_group(group_id)
    # {code_example|end}

    validate_against_openapi_schema(result, '/user_groups/{group_id}', 'delete', '200')
    assert result['result'] == 'success'

@openapi_test_function("/user_groups/{group_id}/members:post")
def update_user_group_members(client: Client, group_id: int) -> None:
    ensure_users([8, 10, 11], ['cordelia', 'hamlet', 'iago'])

    request = {
        'group_id': group_id,
        'delete': [8, 10],
        'add': [11]
    }

    result = client.update_user_group_members(request)

    assert result['result'] == 'success'

def test_invalid_api_key(client_with_invalid_key: Client) -> None:
    result = client_with_invalid_key.list_subscriptions()
    validate_against_openapi_schema(result, '/rest-error-handling', 'post', '400_0')

def test_missing_request_argument(client: Client) -> None:
    result = client.render_message({})

    validate_against_openapi_schema(result, '/rest-error-handling', 'post', '400_1')


def test_invalid_stream_error(client: Client) -> None:
    result = client.get_stream_id('nonexistent')

    validate_against_openapi_schema(result, '/get_stream_id', 'get', '400')


# SETUP METHODS FOLLOW
def test_against_fixture(result: Dict[str, Any], fixture: Dict[str, Any], check_if_equal: Optional[Iterable[str]] = [], check_if_exists: Optional[Iterable[str]] = []) -> None:
    assertLength(result, fixture)

    if not check_if_equal and not check_if_exists:
        for key, value in fixture.items():
            assertEqual(key, result, fixture)

    if check_if_equal:
        for key in check_if_equal:
            assertEqual(key, result, fixture)

    if check_if_exists:
        for key in check_if_exists:
            assertIn(key, result)

def assertEqual(key: str, result: Dict[str, Any], fixture: Dict[str, Any]) -> None:
    if result[key] != fixture[key]:
        first = "{key} = {value}".format(key=key, value=result[key])
        second = "{key} = {value}".format(key=key, value=fixture[key])
        raise AssertionError("Actual and expected outputs do not match; showing diff:\n" +
                             mdiff.diff_strings(first, second))
    else:
        assert result[key] == fixture[key]

def assertLength(result: Dict[str, Any], fixture: Dict[str, Any]) -> None:
    if len(result) != len(fixture):
        result_string = json.dumps(result, indent=4, sort_keys=True)
        fixture_string = json.dumps(fixture, indent=4, sort_keys=True)
        raise AssertionError("The lengths of the actual and expected outputs do not match; showing diff:\n" +
                             mdiff.diff_strings(result_string, fixture_string))
    else:
        assert len(result) == len(fixture)

def assertIn(key: str, result: Dict[str, Any]) -> None:
    if key not in result.keys():
        raise AssertionError(
            "The actual output does not contain the the key `{key}`.".format(key=key)
        )
    else:
        assert key in result

def test_messages(client: Client, nonadmin_client: Client) -> None:

    render_message(client)
    message_id = send_message(client)
    add_reaction(client, message_id)
    remove_reaction(client, message_id)
    update_message(client, message_id)
    get_raw_message(client, message_id)
    get_messages(client)
    get_message_history(client, message_id)
    delete_message(client, message_id)
    mark_all_as_read(client)
    mark_stream_as_read(client)
    mark_topic_as_read(client)
    update_message_flags(client)

    test_nonexistent_stream_error(client)
    test_private_message_invalid_recipient(client)
    test_update_message_edit_permission_error(client, nonadmin_client)
    test_delete_message_edit_permission_error(client, nonadmin_client)

def test_users(client: Client) -> None:

    create_user(client)
    get_members(client)
    get_single_user(client)
    deactivate_user(client)
    reactivate_user(client)
    update_user(client)
    get_profile(client)
    update_notification_settings(client)
    upload_file(client)
    set_typing_status(client)
    get_user_presence(client)
    update_presence(client)
    create_user_group(client)
    group_id = get_user_groups(client)
    update_user_group(client, group_id)
    update_user_group_members(client, group_id)
    remove_user_group(client, group_id)
    get_alert_words(client)
    add_alert_words(client)
    remove_alert_words(client)

def test_streams(client: Client, nonadmin_client: Client) -> None:

    add_subscriptions(client)
    test_add_subscriptions_already_subscribed(client)
    list_subscriptions(client)
    stream_id = get_stream_id(client)
    update_stream(client, stream_id)
    get_streams(client)
    get_subscribers(client)
    remove_subscriptions(client)
    toggle_mute_topic(client)
    update_subscription_settings(client)
    update_notification_settings(client)
    get_stream_topics(client, 1)
    delete_stream(client, stream_id)

    test_user_not_authorized_error(nonadmin_client)
    test_authorization_errors_fatal(client, nonadmin_client)


def test_queues(client: Client) -> None:
    # Note that the example for api/get-events-from-queue is not tested.
    # Since, methods such as client.get_events() or client.call_on_each_message
    # are blocking calls and since the event queue backend is already
    # thoroughly tested in zerver/tests/test_event_queue.py, it is not worth
    # the effort to come up with asynchronous logic for testing those here.
    queue_id = register_queue(client)
    deregister_queue(client, queue_id)

def test_server_organizations(client: Client) -> None:

    get_realm_filters(client)
    add_realm_filter(client)
    get_server_settings(client)
    remove_realm_filter(client)
    get_realm_emoji(client)
    upload_custom_emoji(client)

def test_errors(client: Client) -> None:
    test_missing_request_argument(client)
    test_invalid_stream_error(client)

def test_the_api(client: Client, nonadmin_client: Client) -> None:

    get_user_agent(client)
    test_users(client)
    test_streams(client, nonadmin_client)
    test_messages(client, nonadmin_client)
    test_queues(client)
    test_server_organizations(client)
    test_errors(client)

    sys.stdout.flush()
    if REGISTERED_TEST_FUNCTIONS != CALLED_TEST_FUNCTIONS:
        print("Error!  Some @openapi_test_function tests were never called:")
        print("  ", REGISTERED_TEST_FUNCTIONS - CALLED_TEST_FUNCTIONS)
        sys.exit(1)