# -*- coding: utf-8 -*-
'''
    :codeauthor: Jayesh Kariya <jayeshk@saltstack.com>
'''
# Import Python libs
from __future__ import absolute_import, unicode_literals, print_function

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

from salt.exceptions import CommandExecutionError

# Import Salt Libs
import salt.states.sysctl as sysctl


@skipIf(NO_MOCK, NO_MOCK_REASON)
class SysctlTestCase(TestCase, LoaderModuleMockMixin):
    '''
    Test cases for salt.states.sysctl
    '''
    def setup_loader_modules(self):
        return {sysctl: {}}

    # 'present' function tests: 1

    def test_present(self):
        '''
        Test to ensure that the named sysctl value is set
        in memory and persisted to the named configuration file.
        '''
        name = 'net.ipv4.conf.all.rp_filter'
        value = '1'
        config = '/etc/sysctl.conf'

        comment = ('Sysctl option {0} might be changed, we failed to check '
                   'config file at {1}. The file is either unreadable, or '
                   'missing.'.format(name, config))

        ret = {'name': name, 'result': None, 'changes': {}, 'comment': comment}

        comment_empty = ('Sysctl option {0} would be changed to {1}'
                         ''.format(name, value))

        comment1 = ('Sysctl option {0} set to be changed to {1}'
                    .format(name, value))

        comment2 = ('Sysctl value is currently set on the running system but '
                    'not in a config file. Sysctl option {0} set to be '
                    'changed to 2 in config file.'.format(name))

        comt3 = ('Sysctl value {0} is present in configuration file but is not '
                 'present in the running config. The value {0} is set to be '
                 'changed to {1}'.format(name, value))

        comt4 = ('Sysctl value {0} = {1} is already set'.format(name, value))

        comt5 = ('Sysctl option {0} would be changed to {1}'
                 .format(name, value))

        comt6 = ('Failed to set {0} to {1}: '.format(name, value))

        comt7 = ('Sysctl value {0} = {1} is already set'.format(name, value))

        def mock_current(config_file=None):
            '''
            Mock return value for __salt__.
            '''
            if config_file is None:
                return {name: '2'}
            return ['']

        def mock_config(config_file=None):
            '''
            Mock return value for __salt__.
            '''
            if config_file is None:
                return {'salt': '2'}
            return [name]

        def mock_both(config_file=None):
            '''
            Mock return value for __salt__.
            '''
            if config_file is None:
                return {name: value}
            return [name]

        with patch.dict(sysctl.__opts__, {'test': True}):
            mock = MagicMock(return_value=None)
            with patch.dict(sysctl.__salt__, {'sysctl.show': mock}):
                self.assertDictEqual(sysctl.present(name, value), ret)

            mock = MagicMock(return_value=[])
            with patch.dict(sysctl.__salt__, {'sysctl.show': mock}):
                ret.update({'comment': comment_empty})
                self.assertDictEqual(sysctl.present(name, value), ret)

            with patch.dict(sysctl.__salt__, {'sysctl.show': mock_current}):
                ret.update({'comment': comment1})
                self.assertDictEqual(sysctl.present(name, value), ret)

                ret.update({'comment': comment2})
                self.assertDictEqual(sysctl.present(name, '2'), ret)

            with patch.dict(sysctl.__salt__, {'sysctl.show': mock_config}):
                ret.update({'comment': comt3})
                self.assertDictEqual(sysctl.present(name, value), ret)

            mock = MagicMock(return_value=value)
            with patch.dict(sysctl.__salt__, {'sysctl.show': mock_both,
                                              'sysctl.get': mock}):
                ret.update({'comment': comt4, 'result': True})
                self.assertDictEqual(sysctl.present(name, value), ret)

            mock = MagicMock(return_value=[True])
            with patch.dict(sysctl.__salt__, {'sysctl.show': mock}):
                ret.update({'comment': comt5, 'result': None})
                self.assertDictEqual(sysctl.present(name, value), ret)

        with patch.dict(sysctl.__opts__, {'test': False}):
            mock = MagicMock(side_effect=CommandExecutionError)
            with patch.dict(sysctl.__salt__, {'sysctl.persist': mock}):
                ret.update({'comment': comt6, 'result': False})
                self.assertDictEqual(sysctl.present(name, value), ret)

            mock = MagicMock(return_value='Already set')
            with patch.dict(sysctl.__salt__, {'sysctl.persist': mock}):
                ret.update({'comment': comt7, 'result': True})
                self.assertDictEqual(sysctl.present(name, value), ret)