#!/usr/bin/python
# -*- coding: utf-8 -*-
from __future__ import print_function, absolute_import, division

import socket
import unittest

import gevent.testing as greentest
from gevent.tests.test__socket_dns import TestCase, add

from gevent.testing.sysinfo import OSX
from gevent.testing.sysinfo import RESOLVER_NOT_SYSTEM
from gevent.testing.sysinfo import RESOLVER_DNSPYTHON



# We can't control the DNS servers on CI (or in general...)
# for the system. This works best with the google DNS servers
# The getnameinfo test can fail on CI.

# Previously only Test6_ds failed, but as of Jan 2018, Test6
# and Test6_google begin to fail:

# First differing element 0:
# 'vm2.test-ipv6.com'
# 'ip119.gigo.com'

# - ('vm2.test-ipv6.com', [], ['2001:470:1:18::125'])
# ?   ---------  ^^                             ^^

# + ('ip119.gigo.com', [], ['2001:470:1:18::119'])
# ?     ^^^^^^^^                             ^^

# These are known to work on jamadden's OS X machine using the google
# resolvers (but not with DNSPython; things don't *quite* match)...so
# by default we skip the tests everywhere else.

class Test6(TestCase):

    # host that only has AAAA record
    host = 'aaaa.test-ipv6.com'

    if not OSX or RESOLVER_DNSPYTHON:
        def _test(self, *args): # pylint:disable=arguments-differ
            raise unittest.SkipTest(
                "Only known to work on jamadden's machine. "
                "Please help investigate and make DNS tests more robust."
            )

    def test_empty(self):
        self._test('getaddrinfo', self.host, 'http')

    def test_inet(self):
        self._test('getaddrinfo', self.host, None, socket.AF_INET)

    def test_inet6(self):
        self._test('getaddrinfo', self.host, None, socket.AF_INET6)

    def test_unspec(self):
        self._test('getaddrinfo', self.host, None, socket.AF_UNSPEC)


class Test6_google(Test6):
    host = 'ipv6.google.com'

    def _normalize_result_getnameinfo(self, result):
        if greentest.RUNNING_ON_CI and RESOLVER_NOT_SYSTEM:
            # Disabled, there are multiple possibilities
            # and we can get different ones, rarely.
            return ()
        return result

add(Test6, Test6.host)
add(Test6_google, Test6_google.host)



class Test6_ds(Test6):
    # host that has both A and AAAA records
    host = 'ds.test-ipv6.com'

    def _normalize_result_gethostbyaddr(self, result):
        # This test is effectively disabled. There are multiple address
        # that resolve and which ones you get depend on the settings
        # of the system and ares. They don't match exactly.
        return ()

    _normalize_result_gethostbyname = _normalize_result_gethostbyaddr

add(Test6_ds, Test6_ds.host)


if __name__ == '__main__':
    greentest.main()
