# -*- coding: utf-8 -*-
'''
    :codeauthor: :email:`Jayesh Kariya <jayeshk@saltstack.com>`
'''

# Import Python libs
from __future__ import absolute_import, print_function, unicode_literals

# Import Salt Testing Libs
from tests.support.mixins import LoaderModuleMockMixin
from tests.support.unit import TestCase
from tests.support.mock import (
    MagicMock,
    mock_open,
    patch,
)
# Import Salt Libs
import salt.modules.hosts as hosts
import salt.utils.data
import salt.utils.platform
import salt.utils.stringutils
from salt.ext.six.moves import StringIO
from salt.ext import six


class HostsTestCase(TestCase, LoaderModuleMockMixin):
    '''
    TestCase for salt.modules.hosts
    '''
    def setup_loader_modules(self):
        return {hosts: {}}

    # 'list_hosts' function tests: 1

    def test_list_hosts(self):
        '''
        Tests return the hosts found in the hosts file
        '''
        with patch('salt.modules.hosts._list_hosts',
                   MagicMock(return_value={'10.10.10.10': ['Salt1', 'Salt2']})):
            self.assertDictEqual({'10.10.10.10': ['Salt1', 'Salt2']},
                                 hosts.list_hosts())

    # 'get_ip' function tests: 3

    def test_get_ip(self):
        '''
        Tests return ip associated with the named host
        '''
        with patch('salt.modules.hosts._list_hosts',
                   MagicMock(return_value={'10.10.10.10': ['Salt1', 'Salt2']})):
            self.assertEqual('10.10.10.10', hosts.get_ip('Salt1'))

            self.assertEqual('', hosts.get_ip('Salt3'))

    def test_get_ip_none(self):
        '''
        Tests return ip associated with the named host
        '''
        with patch('salt.modules.hosts._list_hosts', MagicMock(return_value='')):
            self.assertEqual('', hosts.get_ip('Salt1'))

    # 'get_alias' function tests: 2

    def test_get_alias(self):
        '''
        Tests return the list of aliases associated with an ip
        '''
        with patch('salt.modules.hosts._list_hosts',
                   MagicMock(return_value={'10.10.10.10': ['Salt1', 'Salt2']})):
            self.assertListEqual(['Salt1', 'Salt2'], hosts.get_alias('10.10.10.10'))

    def test_get_alias_none(self):
        '''
        Tests return the list of aliases associated with an ip
        '''
        with patch('salt.modules.hosts._list_hosts',
                   MagicMock(return_value={'10.10.10.10': ['Salt1', 'Salt2']})):
            self.assertListEqual([], hosts.get_alias('10.10.10.11'))

    # 'has_pair' function tests: 1

    def test_has_pair(self):
        '''
        Tests return True / False if the alias is set
        '''
        with patch('salt.modules.hosts._list_hosts',
                   MagicMock(return_value={'10.10.10.10': ['Salt1', 'Salt2']})):
            self.assertTrue(hosts.has_pair('10.10.10.10', 'Salt1'))

            self.assertFalse(hosts.has_pair('10.10.10.10', 'Salt3'))

    # 'set_host' function tests: 3

    def test_set_host(self):
        '''
        Tests true if the alias is set
        '''
        hosts_file = '/etc/hosts'
        if salt.utils.platform.is_windows():
            hosts_file = r'C:\Windows\System32\Drivers\etc\hosts'

        with patch('salt.modules.hosts.__get_hosts_filename',
                  MagicMock(return_value=hosts_file)), \
                patch('os.path.isfile', MagicMock(return_value=False)), \
                    patch.dict(hosts.__salt__,
                               {'config.option': MagicMock(return_value=None)}):
            self.assertFalse(hosts.set_host('10.10.10.10', 'Salt1'))

    def test_set_host_true(self):
        '''
        Tests true if the alias is set
        '''
        with patch('salt.modules.hosts.__get_hosts_filename',
                   MagicMock(return_value='/etc/hosts')), \
                patch('os.path.isfile', MagicMock(return_value=True)), \
                    patch('salt.utils.files.fopen', mock_open()):
            mock_opt = MagicMock(return_value=None)
            with patch.dict(hosts.__salt__, {'config.option': mock_opt}):
                self.assertTrue(hosts.set_host('10.10.10.10', 'Salt1'))

    def test_set_host_true_remove(self):
        '''
        Test if an empty hosts value removes existing entries
        '''
        with patch('salt.modules.hosts.__get_hosts_filename',
                   MagicMock(return_value='/etc/hosts')), \
                patch('os.path.isfile', MagicMock(return_value=True)):
            data = ['\n'.join((
                '1.1.1.1 foo.foofoo foo',
                '2.2.2.2 bar.barbar bar',
                '3.3.3.3 asdf.asdfadsf asdf',
                '1.1.1.1 foofoo.foofoo foofoo',
            ))]

            class TmpStringIO(StringIO, object):
                def __init__(self, fn, mode='r'):
                    self.mode = mode
                    initial_value = data[0]
                    if 'w' in self.mode:
                        initial_value = ''
                    super(TmpStringIO, self).__init__(initial_value)

                def __enter__(self):
                    return self

                def __exit__(self, exc_type, exc_value, traceback):
                    self.close()

                def close(self):
                    # Don't save unless there's something there. In Windows
                    # the class gets initialized the first time with mode = w
                    # which sets the initial value to ''. When the class closes
                    # it clears out data and causes the test to fail.
                    # I don't know why it get's initialized with a mode of 'w'
                    # For the purposes of this test data shouldn't be empty
                    # This is a problem with this class and not with the hosts
                    # module
                    if self.getvalue():
                        data[0] = self.getvalue()
                    StringIO.close(self)

                def read(self, *args):
                    ret = super(TmpStringIO, self).read(*args)
                    if six.PY3 and 'b' in self.mode:
                        return salt.utils.stringutils.to_bytes(ret)
                    else:
                        return ret

                def write(self, s, *args):
                    if six.PY3:
                        if 'b' in self.mode:
                            if not isinstance(s, bytes):
                                # Make this act like a binary filehandle
                                raise TypeError("a bytes-like object is required, not 'str'")
                            # The StringIO wants a str type, it won't take
                            # bytes. Convert before writing to it.
                            return super(TmpStringIO, self).write(
                                salt.utils.stringutils.to_str(s), *args)
                        else:
                            if not isinstance(s, str):
                                # Make this act like a non-binary filehandle
                                raise TypeError("write() argument must be str, not bytes")
                    return super(TmpStringIO, self).write(s, *args)

                def readlines(self):
                    ret = super(TmpStringIO, self).readlines()
                    if six.PY3 and 'b' in self.mode:
                        return salt.utils.data.encode(ret)
                    else:
                        return ret

                def writelines(self, lines):
                    for line in lines:
                        self.write(line)

            expected = '\n'.join((
                '2.2.2.2 bar.barbar bar',
                '3.3.3.3 asdf.asdfadsf asdf',
            )) + '\n'

            with patch('salt.utils.files.fopen', TmpStringIO):
                mock_opt = MagicMock(return_value=None)
                with patch.dict(hosts.__salt__, {'config.option': mock_opt}):
                    self.assertTrue(hosts.set_host('1.1.1.1', ' '))

            self.assertEqual(data[0], expected)

    # 'rm_host' function tests: 2

    def test_rm_host(self):
        '''
        Tests if specified host entry gets removed from the hosts file
        '''
        with patch('salt.utils.files.fopen', mock_open()), \
                patch('salt.modules.hosts.__get_hosts_filename',
                      MagicMock(return_value='/etc/hosts')), \
                patch('salt.modules.hosts.has_pair',
                      MagicMock(return_value=True)), \
                patch('os.path.isfile', MagicMock(return_value=True)):
            mock_opt = MagicMock(return_value=None)
            with patch.dict(hosts.__salt__, {'config.option': mock_opt}):
                self.assertTrue(hosts.rm_host('10.10.10.10', 'Salt1'))

    def test_rm_host_false(self):
        '''
        Tests if specified host entry gets removed from the hosts file
        '''
        with patch('salt.modules.hosts.has_pair', MagicMock(return_value=False)):
            self.assertTrue(hosts.rm_host('10.10.10.10', 'Salt1'))

    # 'add_host' function tests: 3

    def test_add_host(self):
        '''
        Tests if specified host entry gets added from the hosts file
        '''
        hosts_file = '/etc/hosts'
        if salt.utils.platform.is_windows():
            hosts_file = r'C:\Windows\System32\Drivers\etc\hosts'

        with patch('salt.utils.files.fopen', mock_open()), \
                patch('salt.modules.hosts.__get_hosts_filename',
                      MagicMock(return_value=hosts_file)):
            mock_opt = MagicMock(return_value=None)
            with patch.dict(hosts.__salt__, {'config.option': mock_opt}):
                self.assertTrue(hosts.add_host('10.10.10.10', 'Salt1'))

    def test_add_host_no_file(self):
        '''
        Tests if specified host entry gets added from the hosts file
        '''
        with patch('salt.utils.files.fopen', mock_open()), \
                patch('os.path.isfile', MagicMock(return_value=False)):
            mock_opt = MagicMock(return_value=None)
            with patch.dict(hosts.__salt__, {'config.option': mock_opt}):
                self.assertFalse(hosts.add_host('10.10.10.10', 'Salt1'))

    def test_add_host_create_entry(self):
        '''
        Tests if specified host entry gets added from the hosts file
        '''
        with patch('salt.utils.files.fopen', mock_open()), \
                patch('os.path.isfile', MagicMock(return_value=True)):
            mock_opt = MagicMock(return_value=None)
            with patch.dict(hosts.__salt__, {'config.option': mock_opt}):
                self.assertTrue(hosts.add_host('10.10.10.10', 'Salt1'))