# -*- coding: utf-8 -*-

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

import os
import shutil
import tempfile
import time
try:
    import pyinotify  # pylint: disable=unused-import
    HAS_PYINOTIFY = True
except ImportError:
    HAS_PYINOTIFY = False

# Import Salt Testing libs
from tests.support.case import MultimasterModuleCase
from tests.support.mixins import AdaptedConfigurationTestCaseMixin
from tests.support.unit import skipIf

# Import salt libs
import salt.version
import salt.config

import logging
log = logging.getLogger(__name__)


@skipIf(not HAS_PYINOTIFY, 'pyinotify is not available')
class TestBeaconsInotify(MultimasterModuleCase, AdaptedConfigurationTestCaseMixin):
    '''
    Validate the inotify beacon in multimaster environment
    '''
    def setUp(self):
        self.tmpdir = salt.utils.stringutils.to_unicode(tempfile.mkdtemp())
        self.addCleanup(shutil.rmtree, self.tmpdir, ignore_errors=True)

    def test_beacons_duplicate_53344(self):
        # Also add a status beacon to use it for interval checks
        res = self.run_function(
            'beacons.add',
            ('inotify', [{'files': {self.tmpdir: {'mask': ['create']}}}]),
            master_tgt='mm-master',
        )
        log.debug('Inotify beacon add returned: %s', res)
        self.assertTrue(res.get('result'))
        self.addCleanup(self.run_function, 'beacons.delete', ('inotify',), master_tgt='mm-master')
        res = self.run_function(
            'beacons.add',
            ('status', [{'time': ['all']}]),
            master_tgt='mm-master',
        )
        log.debug('Status beacon add returned: %s', res)
        self.assertTrue(res.get('result'))
        self.addCleanup(self.run_function, 'beacons.delete', ('status',), master_tgt='mm-master')

        # Ensure beacons are added.
        res = self.run_function(
            'beacons.list',
            (),
            return_yaml=False,
            master_tgt='mm-master',
        )
        log.debug('Beacons list: %s', res)
        self.assertEqual({
            'inotify': [{
                'files': {
                    self.tmpdir: {
                        'mask': ['create']
                        }
                    }
                }],
            'status': [{
                'time': ['all']
                }]
            }, res)

        file_path = os.path.join(self.tmpdir, 'tmpfile')
        master_listener = salt.utils.event.get_master_event(
                self.mm_master_opts,
                sock_dir=self.mm_master_opts['sock_dir'])
        self.addCleanup(master_listener.destroy)
        sub_master_listener = salt.utils.event.get_master_event(
                self.mm_sub_master_opts,
                sock_dir=self.mm_sub_master_opts['sock_dir'])
        self.addCleanup(sub_master_listener.destroy)

        # We have to wait beacon first execution that would configure the inotify watch.
        # Since beacons will be executed both together waiting for the first status beacon event
        # which will mean the inotify beacon was executed too.
        start = time.time()
        stop_at = start + self.mm_minion_opts['loop_interval'] * 2 + 60
        event = sub_event = None
        while True:
            if time.time() > stop_at:
                break
            if not event:
                event = master_listener.get_event(
                    full=True,
                    wait=1,
                    tag='salt/beacon/mm-minion/status',
                    match_type='startswith'
                )
            if sub_event is None:
                sub_event = sub_master_listener.get_event(
                    full=True,
                    wait=1,
                    tag='salt/beacon/mm-minion/status',
                    match_type='startswith'
                )
            if event and sub_event:
                break
        log.debug('Status events received: %s, %s', event, sub_event)

        if not event or not sub_event:
            self.fail('Failed to receive at least one of the status events')

        with salt.utils.files.fopen(file_path, 'w') as f:
            pass

        start = time.time()
        # Now in successful case this test will get results at most in 2 loop intervals.
        # Waiting for 2 loops intervals + some seconds to the hardware stupidity.
        stop_at = start + self.mm_minion_opts['loop_interval'] * 3 + 60
        event = sub_event = None
        expected_tag = salt.utils.stringutils.to_str(
            'salt/beacon/mm-minion/inotify/{}'.format(self.tmpdir))
        while True:
            if time.time() > stop_at:
                break
            if not event:
                event = master_listener.get_event(
                    full=True,
                    wait=1,
                    tag=expected_tag,
                    match_type='startswith'
                )
            if sub_event is None:
                sub_event = sub_master_listener.get_event(
                    full=True,
                    wait=1,
                    tag=expected_tag,
                    match_type='startswith'
                )
            if event and sub_event:
                break
        log.debug('Inotify events received: %s, %s', event, sub_event)

        if not event or not sub_event:
            self.fail('Failed to receive at least one of the inotify events')

        # We can't determine the timestamp so remove it from results
        if event:
            del event['data']['_stamp']
        if sub_event:
            del sub_event['data']['_stamp']

        expected = {
                'data': {
                    'path': file_path,
                    'change': 'IN_CREATE',
                    'id': 'mm-minion',
                    },
                'tag': expected_tag
                }

        # It's better to compare both at once to see both responses in the error log.
        self.assertEqual((expected, expected), (event, sub_event))