from urlparse import urlparse, parse_qs
from saml2 import BINDING_SOAP, BINDING_HTTP_POST

__author__ = 'rolandh'

from saml2.samlp import RequestedAuthnContext, AuthnRequest, NameIDPolicy
from saml2.samlp import AuthnQuery
from saml2.client import Saml2Client
from saml2.saml import AUTHN_PASSWORD
from saml2.saml import AuthnContextClassRef
from saml2.saml import Subject
from saml2.saml import NameID
from saml2.saml import NAMEID_FORMAT_TRANSIENT
from saml2.server import Server

TAG1 = "name=\"SAMLRequest\" value="


def get_msg(hinfo, binding):
    if binding == BINDING_SOAP:
        xmlstr = hinfo["data"]
    elif binding == BINDING_HTTP_POST:
        _inp = hinfo["data"][3]
        i = _inp.find(TAG1)
        i += len(TAG1) + 1
        j = _inp.find('"', i)
        xmlstr = _inp[i:j]
    else:  # BINDING_HTTP_REDIRECT
        parts = urlparse(hinfo["headers"][0][1])
        xmlstr = parse_qs(parts.query)["SAMLRequest"][0]

    return xmlstr

# ------------------------------------------------------------------------


def test_basic():
    sp = Saml2Client(config_file="servera_conf")
    idp = Server(config_file="idp_all_conf")

    srvs = sp.metadata.authn_query_service(idp.config.entityid)

    destination = srvs[0]["location"]
    authn_context = [RequestedAuthnContext(
        authn_context_class_ref=AuthnContextClassRef(
            text=AUTHN_PASSWORD))]

    subject = Subject(text="abc",
                      name_id=NameID(format=NAMEID_FORMAT_TRANSIENT))

    aq = sp.create_authn_query(subject, destination, authn_context)

    print aq

    assert isinstance(aq, AuthnQuery)


def test_flow():
    sp = Saml2Client(config_file="servera_conf")
    idp = Server(config_file="idp_all_conf")

    relay_state = "FOO"
    # -- dummy request ---
    orig_req = AuthnRequest(
        issuer=sp._issuer(),
        name_id_policy=NameIDPolicy(allow_create="true",
                                    format=NAMEID_FORMAT_TRANSIENT))

    # == Create an AuthnRequest response

    name_id = idp.ident.transient_nameid(sp.config.entityid, "id12")
    binding, destination = idp.pick_binding("assertion_consumer_service",
                                            entity_id=sp.config.entityid)
    resp = idp.create_authn_response({"eduPersonEntitlement": "Short stop",
                                      "surName": "Jeter",
                                      "givenName": "Derek",
                                      "mail": "derek.jeter@nyy.mlb.com",
                                      "title": "The man"},
                                     "id-123456789",
                                     destination,
                                     sp.config.entityid,
                                     name_id=name_id,
                                     authn=(AUTHN_PASSWORD,
                                            "http://www.example.com/login"))

    hinfo = idp.apply_binding(binding, "%s" % resp, destination, relay_state)

    # ------- @SP ----------

    xmlstr = get_msg(hinfo, binding)
    aresp = sp.parse_authn_request_response(xmlstr, binding,
                                            {resp.in_response_to :"/"})

    binding, destination = sp.pick_binding("authn_query_service",
                                           entity_id=idp.config.entityid)

    authn_context = [RequestedAuthnContext(
        authn_context_class_ref=AuthnContextClassRef(
            text=AUTHN_PASSWORD))]

    subject = aresp.assertion.subject

    aq = sp.create_authn_query(subject, destination, authn_context)

    print aq

    assert isinstance(aq, AuthnQuery)
    binding = BINDING_SOAP

    hinfo = sp.apply_binding(binding, "%s" % aq, destination, "state2")

    # -------- @IDP ----------

    xmlstr = get_msg(hinfo, binding)

    pm = idp.parse_authn_query(xmlstr, binding)

    msg = pm.message
    assert msg.id == aq.id

    p_res = idp.create_authn_query_response(msg.subject, msg.session_index,
                                            msg.requested_authn_context)

    print p_res

    hinfo = idp.apply_binding(binding, "%s" % p_res, "", "state2",
                              response=True)

    # ------- @SP ----------

    xmlstr = get_msg(hinfo, binding)

    final = sp.parse_authn_query_response(xmlstr, binding)

    print final

    assert final.response.id == p_res.id
