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#------------------------------------------------------------------------------
#
# Copyright (c) Microsoft Corporation. 
# All rights reserved.
# 
# This code is licensed under the MIT License.
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files(the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions :
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
#------------------------------------------------------------------------------

import sys
import base64
try:
    from urllib.parse import urlparse
except ImportError:
    from urlparse import urlparse #pylint: disable=import-error

import adal

from .constants import AdalIdParameters

def is_http_success(status_code):
    return status_code >= 200 and status_code < 300

def add_default_request_headers(self, options):
    if not options.get('headers'):
        options['headers'] = {}

    headers = options['headers']
    if not headers.get('Accept-Charset'):
        headers['Accept-Charset'] = 'utf-8'

    #pylint: disable=protected-access
    headers['client-request-id'] = self._call_context['log_context']['correlation_id']
    headers['return-client-request-id'] = 'true'

    headers[AdalIdParameters.SKU] = AdalIdParameters.PYTHON_SKU
    headers[AdalIdParameters.VERSION] = adal.__version__
    headers[AdalIdParameters.OS] = sys.platform
    headers[AdalIdParameters.CPU] = 'x64' if sys.maxsize > 2 ** 32 else 'x86'

def create_request_options(self, *options):

    merged_options = {}

    if options:
        for i in options:
            merged_options.update(i)

    #pylint: disable=protected-access
    if self._call_context.get('options') and self._call_context['options'].get('http'):
        merged_options.update(self._call_context['options']['http'])

    add_default_request_headers(self, merged_options)
    return merged_options


def log_return_correlation_id(log, operation_message, response):
    if response and response.headers and response.headers.get('client-request-id'):
        log.info("{} Server returned this correlation_id: {}".format(
            operation_message, 
            response.headers['client-request-id']))

def copy_url(url_source):
    if hasattr(url_source, 'geturl'):
        return urlparse(url_source.geturl())
    else:
        return urlparse(url_source)

# urlsafe_b64decode requires correct padding.  AAD does not include padding so
# the string needs to be correctly padded before decoding.
def base64_urlsafe_decode(b64string):
    b64string += '=' * (4 - ((len(b64string) % 4)))
    return base64.urlsafe_b64decode(b64string.encode('ascii'))