# Copyright (c) 2016, Patrick Uiterwijk <patrick@puiterwijk.org>,
#           (c) 2019, Lars Wilhelmsen <lars@sral.org>
# All rights reserved.
#
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# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
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import httplib2

from flask_oidc_ex import _json_loads


# OpenID Connect Discovery 1.0
def discover_OP_information(OP_uri, httpFactory=None):
    """
    Discovers information about the provided OpenID Provider.

    :param OP_uri: The base URI of the Provider information is requested for.
    :type OP_uri: str
    :returns: The contents of the Provider metadata document.
    :rtype: dict

    .. versionadded:: 1.0
    """
    http = None
    if httpFactory is not None and callable(httpFactory):
        http = httpFactory()
    else:
        http = httplib2.Http()

    _, content = http.request(
        '%s/.well-known/openid-configuration' % OP_uri)
    return _json_loads(content)
