# This file is part of Checkbox.
#
# Copyright 2012, 2013 Canonical Ltd.
# Written by:
#   Zygmunt Krynicki <zygmunt.krynicki@canonical.com>
#   Daniel Manrique <roadmr@ubuntu.com>
#
# Checkbox is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3,
# as published by the Free Software Foundation.

#
# Checkbox is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Checkbox.  If not, see <http://www.gnu.org/licenses/>.

"""
plainbox.impl.transport.test_certification
==========================================

Test definitions for plainbox.impl.certification module
"""

from io import BytesIO
from unittest import TestCase

from pkg_resources import resource_string
from plainbox.impl.applogic import PlainBoxConfig
from plainbox.vendor import mock
from plainbox.vendor.mock import MagicMock
from requests.exceptions import ConnectionError, InvalidSchema, HTTPError
import requests

from checkbox_ng.certification import CertificationTransport
from checkbox_ng.certification import InvalidSecureIDError


class CertificationTransportTests(TestCase):

    #URL are just here to exemplify, since we mock away all network access,
    #they're not really used.
    valid_url = "https://certification.canonical.com/submissions/submit"
    invalid_url = "htz://:3128"
    unreachable_url = "http://i.dont.exist"
    valid_secure_id = "a00D000000Kkk5j"
    valid_option_string = "secure_id={}".format(valid_secure_id)

    def setUp(self):
        self.sample_xml = BytesIO(resource_string(
            "plainbox", "test-data/xml-exporter/example-data.xml"
        ))
        self.patcher = mock.patch('requests.post')
        self.mock_requests = self.patcher.start()

    def test_parameter_parsing(self):
        #Makes sense since I'm overriding the base class's constructor.
        transport = CertificationTransport(self.valid_url,
                                           self.valid_option_string)
        self.assertEqual(self.valid_url, transport.url)
        self.assertEqual(self.valid_secure_id,
                         transport.options['secure_id'])

    def test_invalid_length_secure_id_are_rejected(self):
        for length in (14, 16, 20):
            dummy_id = "a" * length
            option_string = "secure_id={}".format(dummy_id)
            with self.assertRaises(InvalidSecureIDError):
                transport = CertificationTransport(self.valid_url,
                                                   option_string)
                self.assertIsInstance(CertificationTransport,
                                      transport)

    def test_invalid_characters_in_secure_id_are_rejected(self):
        option_string = "secure_id=aA0#"
        with self.assertRaises(InvalidSecureIDError):
                transport = CertificationTransport(self.valid_url,
                                                   option_string)
                self.assertIsInstance(CertificationTransport,
                                      transport)

    def test_invalid_url(self):
        transport = CertificationTransport(self.invalid_url,
                                           self.valid_option_string)
        dummy_data = BytesIO(b"some data to send")
        requests.post.side_effect = InvalidSchema

        with self.assertRaises(InvalidSchema):
            result = transport.send(dummy_data)
            self.assertIsNotNone(result)
        requests.post.assert_called_with(self.invalid_url,
                                         files={'data': dummy_data},
                                         headers={'X_HARDWARE_ID':
                                         self.valid_secure_id},
                                         proxies=None)

    def test_valid_url_cant_connect(self):
        transport = CertificationTransport(self.unreachable_url,
                                           self.valid_option_string)
        dummy_data = BytesIO(b"some data to send")
        requests.post.side_effect = ConnectionError

        with self.assertRaises(ConnectionError):
            result = transport.send(dummy_data)
            self.assertIsNotNone(result)
        requests.post.assert_called_with(self.unreachable_url,
                                         files={'data': dummy_data},
                                         headers={'X_HARDWARE_ID':
                                                  self.valid_secure_id},
                                         proxies=None)

    def test_send_success(self):
        transport = CertificationTransport(self.valid_url,
                                           self.valid_option_string)

        requests.post.return_value = MagicMock(name='response')
        requests.post.return_value.status_code = 200
        requests.post.return_value.text = '{"id": 768}'
        result = transport.send(self.sample_xml)

        self.assertTrue(result)

    def test_send_failure(self):
        transport = CertificationTransport(self.valid_url,
                                           self.valid_option_string)

        requests.post.return_value = MagicMock(name='response')
        requests.post.return_value.status_code = 412
        requests.post.return_value.text = 'Some error'
        #Oops, raise_for_status doesn't get fooled by my mocking,
        #so I have to mock *that* method as well..
        requests.post.return_value.raise_for_status = MagicMock(
            side_effect=HTTPError)

        with self.assertRaises(HTTPError):
            result = transport.send(self.sample_xml)
            self.assertIsNotNone(result)

    def proxy_test(self, environment, proxies):
        test_environment = environment
        test_proxies = proxies
        test_config = PlainBoxConfig()
        test_config.environment = test_environment

        transport = CertificationTransport(self.valid_url,
                                           self.valid_option_string,
                                           config=test_config)
        dummy_data = BytesIO(b"some data to send")

        requests.post.return_value = MagicMock(name='response')
        requests.post.return_value.status_code = 200
        requests.post.return_value.text = '{"id": 768}'
        result = transport.send(dummy_data)

        self.assertTrue(result)

        requests.post.assert_called_with(self.valid_url,
                                         files={'data': dummy_data},
                                         headers={'X_HARDWARE_ID':
                                         self.valid_secure_id},
                                         proxies=test_proxies)

    def test_set_only_one_proxy(self):
        test_environment = {'http_proxy': "http://1.2.3.4:5"}
        test_proxies = {'http': "http://1.2.3.4:5"}
        self.proxy_test(test_environment, test_proxies)

    def test_set_two_proxies(self):
        test_environment = {'http_proxy': "http://1.2.3.4:5",
                            'https_proxy': "http://1.2.3.4:6"}
        test_proxies = {'http': "http://1.2.3.4:5",
                        'https': "http://1.2.3.4:6"}
        self.proxy_test(test_environment, test_proxies)

    def test_behavior_with_extraneous_environment(self):
        test_environment = {'http_proxy': "http://1.2.3.4:5",
                            'weird_value': 'What is this'}
        test_proxies = {'http': "http://1.2.3.4:5"}
        self.proxy_test(test_environment, test_proxies)

