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import sys
from azure.core.pipeline.transport import HttpRequest
from azure.core import PipelineClient
from azure.core.pipeline.policies import RedirectPolicy
from azure.core.pipeline.policies import UserAgentPolicy
from azure.core.pipeline.policies import SansIOHTTPPolicy


def test_example_headers_policy():
    url = "https://bing.com"
    policies = [
        UserAgentPolicy("myuseragent"),
        RedirectPolicy()
    ]

    # [START headers_policy]
    from azure.core.pipeline.policies import HeadersPolicy

    headers_policy = HeadersPolicy()
    headers_policy.add_header('CustomValue', 'Foo')

    # Or headers can be added per operation. These headers will supplement existing headers
    # or those defined in the config headers policy. They will also overwrite existing
    # identical headers.
    policies.append(headers_policy)
    client = PipelineClient(base_url=url, policies=policies)
    request = client.get(url)
    pipeline_response = client._pipeline.run(request, headers={'CustomValue': 'Bar'})
    # [END headers_policy]

    response = pipeline_response.http_response
    assert response.status_code == 200


def test_example_user_agent_policy():
    url = "https://bing.com"
    redirect_policy = RedirectPolicy()

    # [START user_agent_policy]
    from azure.core.pipeline.policies import UserAgentPolicy

    user_agent_policy = UserAgentPolicy()

    # The user-agent policy allows you to append a custom value to the header.
    user_agent_policy.add_user_agent("CustomValue")

    # You can also pass in a custom value per operation to append to the end of the user-agent.
    # This can be used together with the policy configuration to append multiple values.
    policies=[
        redirect_policy,
        user_agent_policy,
    ]
    client = PipelineClient(base_url=url, policies=policies)
    request = client.get(url)
    pipeline_response = client._pipeline.run(request, user_agent="AnotherValue")
    # [END user_agent_policy]

    response = pipeline_response.http_response
    assert response.status_code == 200


def example_network_trace_logging():
    filename = "log.txt"
    url = "https://bing.com"
    policies = [
        UserAgentPolicy("myuseragent"),
        RedirectPolicy()
    ]

    # [START network_trace_logging_policy]
    from azure.core.pipeline.policies import NetworkTraceLoggingPolicy
    import sys
    import logging

    # Create a logger for the 'azure' SDK
    logger = logging.getLogger("azure")
    logger.setLevel(logging.DEBUG)

    # Configure a console output
    handler = logging.StreamHandler(stream=sys.stdout)
    logger.addHandler(handler)

    # Configure a file output
    file_handler = logging.FileHandler(filename)
    logger.addHandler(file_handler)

    # Enable network trace logging. This will be logged at DEBUG level.
    # By default, logging is disabled.
    logging_policy = NetworkTraceLoggingPolicy()
    logging_policy.enable_http_logger = True

    # The logger can also be enabled per operation.
    policies.append(logging_policy)
    client = PipelineClient(base_url=url, policies=policies)
    request = client.get(url)
    pipeline_response = client._pipeline.run(request, logging_enable=True)

    # [END network_trace_logging_policy]
    response = pipeline_response.http_response
    assert response.status_code == 200

def example_proxy_policy():

    # [START proxy_policy]
    from azure.core.pipeline.policies import ProxyPolicy

    proxy_policy = ProxyPolicy()

    # Example
    proxy_policy.proxies = {'http': 'http://10.10.1.10:3148'}

    # Use basic auth
    proxy_policy.proxies = {'https': 'http://user:password@10.10.1.10:1180/'}

    # You can also configure proxies by setting the environment variables
    # HTTP_PROXY and HTTPS_PROXY.
    # [END proxy_policy]

def example_on_exception():
    policy = SansIOHTTPPolicy()
    request = HttpRequest("GET", "https://bing.com")
    # [START on_exception]
    try:
        response = policy.next.send(request)
    except Exception:
        if not policy.on_exception(request):
            raise

    # or use
    exc_type, exc_value, exc_traceback = sys.exc_info()
    # [END on_exception]
