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import io
import logging
import os

from azure.messaging.webpubsubservice import WebPubSubServiceClient
from azure.identity import DefaultAzureCredential
from azure.core.exceptions import HttpResponseError

logging.basicConfig(level=logging.DEBUG)
LOG = logging.getLogger()

# Set the values of the client ID, tenant ID, and client secret of the AAD application as environment variables:
# AZURE_CLIENT_ID, AZURE_TENANT_ID, AZURE_CLIENT_SECRET, WEBPUBSUB_ENDPOINT, WEBPUBSUB_REVERSE_PROXY_ENDPOINT
try:
    endpoint = os.environ["WEBPUBSUB_ENDPOINT"]
    reverse_proxy_endpoint = os.environ["WEBPUBSUB_REVERSE_PROXY_ENDPOINT"]
except KeyError:
    LOG.error("Missing environment variable 'WEBPUBSUB_ENDPOINT' or 'WEBPUBSUB_REVERSE_PROXY_ENDPOINT' - please set if before running the example")
    exit()

# Build a client through AAD
# If you want to know more about the effect of `reverse_proxy_endpoint`, please reference: https://github.com/Azure/azure-webpubsub/issues/194
client = WebPubSubServiceClient(endpoint=endpoint, hub='hub', credential=DefaultAzureCredential(), reverse_proxy_endpoint=reverse_proxy_endpoint)

# Send a json message to everybody on the given hub...
try:
    # Raise an exception if the service rejected the call
    client.send_to_all(message={'Hello': 'reverse_proxy_endpoint!'})
    print('Successfully sent a JSON message')
except HttpResponseError as e:
    print('Failed to send JSON message: {}'.format(e.response.json()))

# Send a text message to everybody on the given hub...
try:
    # Raise an exception if the service rejected the call
    client.send_to_all(message='hello, reverse_proxy_endpoint!', content_type='text/plain')
    print('Successfully sent a JSON message')
except HttpResponseError as e:
    print('Failed to send JSON message: {}'.format(e.response.json()))


# Send a json message from a stream to everybody on the given hub...
try:
    # Raise an exception if the service rejected the call
    client.send_to_all(message=io.BytesIO(b'{ "hello": "reverse_proxy_endpoint" }'), content_type='application/octet-stream')
    print('Successfully sent a JSON message')
except HttpResponseError as e:
    print('Failed to send JSON message: {}'.format(e.response.json()))

