# -*- coding: utf-8 -*-
'''
Tests for minion blackout
'''

# Import Python libs
from __future__ import absolute_import
import os
import time
import logging
import textwrap

# Import Salt Testing libs
from tests.support.case import ModuleCase
from tests.support.helpers import flaky
from tests.support.runtests import RUNTIME_VARS

# Import Salt libs
import salt.utils.files

log = logging.getLogger(__name__)


class MinionBlackoutTestCase(ModuleCase):
    '''
    Test minion blackout functionality
    '''

    @classmethod
    def setUpClass(cls):
        cls.top_pillar = os.path.join(RUNTIME_VARS.TMP_PILLAR_TREE, 'top.sls')
        cls.blackout_pillar = os.path.join(RUNTIME_VARS.TMP_PILLAR_TREE, 'blackout.sls')

    @classmethod
    def tearDownClass(cls):
        if os.path.exists(cls.top_pillar):
            os.unlink(cls.top_pillar)
        del cls.top_pillar
        if os.path.exists(cls.blackout_pillar):
            os.unlink(cls.blackout_pillar)
        del cls.blackout_pillar

    def setUp(self):
        with salt.utils.files.fopen(self.top_pillar, 'w') as wfh:
            wfh.write(textwrap.dedent('''\
                base:
                  '*':
                    - blackout
                '''))
        with salt.utils.files.fopen(self.blackout_pillar, 'w') as wfh:
            wfh.write('minion_blackout: False')
        self.addCleanup(self.cleanup_blackout_pillar)

    def tearDown(self):
        self.end_blackout(sleep=False)
        # Be sure to also refresh the sub_minion pillar
        self.run_function('saltutil.refresh_pillar', minion_tgt='sub_minion')
        time.sleep(10)  # wait for minion to exit blackout mode
        self.wait_for_all_jobs()

    def cleanup_blackout_pillar(self):
        if os.path.exists(self.top_pillar):
            os.unlink(self.top_pillar)
        if os.path.exists(self.blackout_pillar):
            os.unlink(self.blackout_pillar)

    def begin_blackout(self, blackout_data='minion_blackout: True'):
        '''
        setup minion blackout mode
        '''
        log.info('Entering minion blackout...')
        self.wait_for_all_jobs()
        with salt.utils.files.fopen(self.blackout_pillar, 'w') as wfh:
            wfh.write(blackout_data)
        self.run_function('saltutil.refresh_pillar')
        time.sleep(10)  # wait for minion to enter blackout mode
        log.info('Entered minion blackout.')

    def end_blackout(self, sleep=True):
        '''
        takedown minion blackout mode
        '''
        log.info('Exiting minion blackout...')
        with salt.utils.files.fopen(self.blackout_pillar, 'w') as wfh:
            wfh.write('minion_blackout: False\n')
        self.run_function('saltutil.refresh_pillar')
        if sleep:
            time.sleep(10)  # wait for minion to exit blackout mode
        self.wait_for_all_jobs()
        log.info('Exited minion blackout.')

    @flaky
    def test_blackout(self):
        '''
        Test that basic minion blackout functionality works
        '''
        try:
            self.begin_blackout()
            blackout_ret = self.run_function('test.ping')
            self.assertIn('Minion in blackout mode.', blackout_ret)
        finally:
            self.end_blackout()

        ret = self.run_function('test.ping')
        self.assertEqual(ret, True)

    @flaky
    def test_blackout_whitelist(self):
        '''
        Test that minion blackout whitelist works
        '''
        self.begin_blackout(textwrap.dedent('''\
            minion_blackout: True
            minion_blackout_whitelist:
              - test.ping
              - test.fib
            '''))

        ping_ret = self.run_function('test.ping')
        self.assertEqual(ping_ret, True)

        fib_ret = self.run_function('test.fib', [7])
        self.assertTrue(isinstance(fib_ret, list))
        self.assertEqual(fib_ret[0], 13)

    @flaky
    def test_blackout_nonwhitelist(self):
        '''
        Test that minion refuses to run non-whitelisted functions during
        blackout whitelist
        '''
        self.begin_blackout(textwrap.dedent('''\
            minion_blackout: True
            minion_blackout_whitelist:
              - test.ping
              - test.fib
            '''))

        state_ret = self.run_function('state.apply')
        self.assertIn('Minion in blackout mode.', state_ret)

        cloud_ret = self.run_function('cloud.query', ['list_nodes_full'])
        self.assertIn('Minion in blackout mode.', cloud_ret)