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

# Import python libs
from __future__ import absolute_import, print_function, unicode_literals
import logging

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

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

log = logging.getLogger(__name__)

mock_hosts_file = salt.utils.stringutils.to_str(
                  '##\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 = salt.utils.stringutils.to_str(
                '$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_writes_list = salt.utils.data.decode([
            '##\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',
            '\n'
    ], to_str=True
)


@skipIf(NO_MOCK, NO_MOCK_REASON)
class DNSUtilTestCase(TestCase):
    def test_parse_hosts(self):
        with patch('salt.utils.files.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.files.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')
            writes = m_open.write_calls()
            # We should have called .write() only once, with the expected
            # content
            num_writes = len(writes)
            assert num_writes == 1, num_writes
            expected = salt.utils.stringutils.to_str('\n127.0.0.1 ad1.yuk.co ad2.yuk.co')
            assert writes[0] == expected, writes[0]

    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.files.fopen', mock_open(read_data=new_mock_file)) as m_open:
            dnsutil.hosts_remove('/etc/hosts', to_remove)
            writes = m_open.write_calls()
            assert writes == mock_writes_list, writes

    @skipIf(True, 'Waiting on bug report fixes')
    def test_parse_zone(self):
        with patch('salt.utils.files.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')