# -*- coding: utf-8 -*-
'''
    :codeauthor: Nicole Thomas <nicole@saltstack.com>
'''

# Import python libs
from __future__ import absolute_import
import logging

# Import Salt Testing Libs
from tests.support.unit import TestCase, skipIf
from tests.support.mock import (
    MagicMock,
    patch,
    mock_open,
    call,
    NO_MOCK,
    NO_MOCK_REASON
)

# Import Salt Libs
import salt.modules.dnsutil as dnsutil

log = logging.getLogger(__name__)

mock_hosts_file = '##\n' \
                  '# Host Database\n' \
                  '#\n' \
                  '# localhost is used to configure the loopback interface\n' \
                  '# when the system is booting.  Do not change this entry.\n' \
                  '##\n' \
                  '127.0.0.1	localhost\n' \
                  '255.255.255.255	broadcasthost\n' \
                  '::1             localhost\n' \
                  'fe80::1%lo0	localhost'

mock_hosts_file_rtn = {'::1': ['localhost'], '255.255.255.255': ['broadcasthost'],
                       '127.0.0.1': ['localhost'], 'fe80::1%lo0': ['localhost']}

mock_soa_zone = '$TTL 3D\n' \
                '@               IN      SOA     land-5.com. root.land-5.com. (\n' \
                '199609203       ; Serial\n' \
                '28800   ; Refresh\n' \
                '7200    ; Retry\n' \
                '604800  ; Expire\n' \
                '86400)  ; Minimum TTL\n' \
                'NS      land-5.com.\n\n' \
                '1                       PTR     localhost.'

if NO_MOCK is False:
    mock_calls_list = [call.read(), call.write('##\n'),
                       call.write('# Host Database\n'),
                       call.write('#\n'),
                       call.write('# localhost is used to configure the loopback interface\n'),
                       call.write('# when the system is booting.  Do not change this entry.\n'),
                       call.write('##\n'),
                       call.write('127.0.0.1 localhost'),
                       call.write('\n'),
                       call.write('255.255.255.255 broadcasthost'),
                       call.write('\n'),
                       call.write('::1 localhost'),
                       call.write('\n'),
                       call.write('fe80::1%lo0 localhost'),
                       call.write('\n')]


@skipIf(NO_MOCK, NO_MOCK_REASON)
class DNSUtilTestCase(TestCase):
    def test_parse_hosts(self):
        with patch('salt.utils.fopen', mock_open(read_data=mock_hosts_file)):
            self.assertEqual(dnsutil.parse_hosts(), {'::1': ['localhost'],
                                                     '255.255.255.255': ['broadcasthost'],
                                                     '127.0.0.1': ['localhost'],
                                                     'fe80::1%lo0': ['localhost']})

    def test_hosts_append(self):
        with patch('salt.utils.fopen', mock_open(read_data=mock_hosts_file)) as m_open, \
                patch('salt.modules.dnsutil.parse_hosts', MagicMock(return_value=mock_hosts_file_rtn)):
            dnsutil.hosts_append('/etc/hosts', '127.0.0.1', 'ad1.yuk.co,ad2.yuk.co')
            helper_open = m_open()
            helper_open.write.assert_called_once_with('\n127.0.0.1 ad1.yuk.co ad2.yuk.co')

    def test_hosts_remove(self):
        to_remove = 'ad1.yuk.co'
        new_mock_file = mock_hosts_file + '\n127.0.0.1 ' + to_remove + '\n'
        with patch('salt.utils.fopen', mock_open(read_data=new_mock_file)) as m_open:
            dnsutil.hosts_remove('/etc/hosts', to_remove)
            helper_open = m_open()
            calls_list = helper_open.method_calls
            self.assertEqual(calls_list, mock_calls_list)

    @skipIf(True, 'Waiting on bug report fixes')
    def test_parse_zone(self):
        with patch('salt.utils.fopen', mock_open(read_data=mock_soa_zone)):
            log.debug(mock_soa_zone)
            log.debug(dnsutil.parse_zone('/var/lib/named/example.com.zone'))

    def test_to_seconds_hour(self):
        self.assertEqual(dnsutil._to_seconds('4H'), 14400,
                         msg='Did not detect valid hours as invalid')

    def test_to_seconds_day(self):
        self.assertEqual(dnsutil._to_seconds('1D'), 86400,
                         msg='Did not detect valid day as invalid')

    def test_to_seconds_week(self):
        self.assertEqual(dnsutil._to_seconds('2W'), 604800,
                         msg='Did not set time greater than one week to one week')

    def test_to_seconds_empty(self):
        self.assertEqual(dnsutil._to_seconds(''), 604800,
                         msg='Did not set empty time to one week')

    def test_to_seconds_large(self):
        self.assertEqual(dnsutil._to_seconds('604801'), 604800,
                         msg='Did not set time greater than one week to one week')