# -*- coding: utf-8 -*-
"""
    :codeauthor: Rupesh Tare <rupesht@saltstack.com>
"""
# Import Python libs
from __future__ import absolute_import, print_function, unicode_literals

import textwrap

import salt.modules.ddns as ddns

# Import Salt Libs
import salt.utils.json

# Import Salt Testing Libs
from tests.support.mixins import LoaderModuleMockMixin
from tests.support.mock import MagicMock, mock_open, patch
from tests.support.unit import TestCase, skipIf

try:
    import dns.query
    import dns.tsigkeyring

    HAS_DNS = True
except ImportError:
    HAS_DNS = False


@skipIf(HAS_DNS is False, "dnspython libs not installed")
class DDNSTestCase(TestCase, LoaderModuleMockMixin):
    """
    TestCase for the salt.modules.ddns module
    """

    def setup_loader_modules(self):
        return {ddns: {}}

    def test_add_host(self):
        """
        Test cases for Add, replace, or update the A
        and PTR (reverse) records for a host.
        """
        with patch("salt.modules.ddns.update") as ddns_update:
            ddns_update.return_value = False
            self.assertFalse(ddns.add_host(zone="A", name="B", ttl=1, ip="172.27.0.0"))

            ddns_update.return_value = True
            self.assertTrue(ddns.add_host(zone="A", name="B", ttl=1, ip="172.27.0.0"))

    def test_delete_host(self):
        """
        Tests for delete the forward and reverse records for a host.
        """
        with patch("salt.modules.ddns.delete") as ddns_delete:
            ddns_delete.return_value = False
            with patch.object(dns.query, "udp") as mock:
                mock.answer = [{"address": "localhost"}]
                self.assertFalse(ddns.delete_host(zone="A", name="B"))

    def test_update(self):
        """
        Test to add, replace, or update a DNS record.
        """
        mock_request = textwrap.dedent(
            """\
            id 29380
            opcode QUERY
            rcode NOERROR
            flags RD
            ;QUESTION
            name.zone. IN AAAA
            ;ANSWER
            ;AUTHORITY
            ;ADDITIONAL"""
        )
        mock_rdtype = 28  # rdtype of AAAA record

        class MockRrset(object):
            def __init__(self):
                self.items = [{"address": "localhost"}]
                self.ttl = 2

        class MockAnswer(object):
            def __init__(self, *args, **kwargs):
                self.answer = [MockRrset()]

            def rcode(self):
                return 0

        def mock_udp_query(*args, **kwargs):
            return MockAnswer

        with patch.object(
            dns.message, "make_query", MagicMock(return_value=mock_request)
        ):
            with patch.object(dns.query, "udp", mock_udp_query()):
                with patch.object(
                    dns.rdatatype, "from_text", MagicMock(return_value=mock_rdtype)
                ):
                    with patch.object(ddns, "_get_keyring", return_value=None):
                        with patch.object(ddns, "_config", return_value=None):
                            self.assertTrue(
                                ddns.update("zone", "name", 1, "AAAA", "::1")
                            )

    def test_delete(self):
        """
        Test to delete a DNS record.
        """
        file_data = salt.utils.json.dumps({"A": "B"})

        class MockAnswer(object):
            def __init__(self, *args, **kwargs):
                self.answer = [{"address": "localhost"}]

            def rcode(self):
                return 0

        def mock_udp_query(*args, **kwargs):
            return MockAnswer

        with patch.object(dns.query, "udp", mock_udp_query()):
            with patch(
                "salt.utils.files.fopen", mock_open(read_data=file_data), create=True
            ):
                with patch.object(dns.tsigkeyring, "from_text", return_value=True):
                    with patch.object(ddns, "_get_keyring", return_value=None):
                        with patch.object(ddns, "_config", return_value=None):
                            self.assertTrue(ddns.delete(zone="A", name="B"))