# coding: utf-8

# Python libs
from __future__ import absolute_import
from collections import namedtuple

# Salt testing libs
from tests.support.unit import skipIf, TestCase
from tests.support.mock import NO_MOCK, NO_MOCK_REASON, patch, MagicMock
from tests.support.mixins import LoaderModuleMockMixin

# Salt libs
import salt.beacons.diskusage as diskusage

STUB_DISK_PARTITION = namedtuple(
    'partition',
    'device mountpoint fstype, opts')(
        '/dev/disk0s2', '/', 'hfs',
        'rw,local,rootfs,dovolfs,journaled,multilabel')
STUB_DISK_USAGE = namedtuple('usage',
                             'total used free percent')(1000, 500, 500, 50)


@skipIf(NO_MOCK, NO_MOCK_REASON)
class DiskUsageBeaconTestCase(TestCase, LoaderModuleMockMixin):
    '''
    Test case for salt.beacons.adb
    '''

    def setup_loader_modules(self):
        return {}

    def test_non_list_config(self):
        config = {}

        ret = diskusage.validate(config)

        self.assertEqual(ret, (False, 'Configuration for diskusage beacon must'
                                      ' be a list.'))

    def test_empty_config(self):
        config = [{}]

        ret = diskusage.validate(config)

        self.assertEqual(ret, (True, 'Valid beacon configuration'))

    def test_diskusage_match(self):
        with patch('psutil.disk_partitions',
                   MagicMock(return_value=[STUB_DISK_PARTITION])), \
                patch('psutil.disk_usage',
                      MagicMock(return_value=STUB_DISK_USAGE)):
            config = [{'/': '50%'}]

            ret = diskusage.validate(config)

            self.assertEqual(ret, (True, 'Valid beacon configuration'))

            ret = diskusage.beacon(config)
            self.assertEqual(ret, [{'diskusage': 50, 'mount': '/'}])

    def test_diskusage_nomatch(self):
        with patch('psutil.disk_partitions',
                   MagicMock(return_value=[STUB_DISK_PARTITION])), \
                patch('psutil.disk_usage',
                      MagicMock(return_value=STUB_DISK_USAGE)):
            config = [{'/': '70%'}]

            ret = diskusage.validate(config)

            self.assertEqual(ret, (True, 'Valid beacon configuration'))

            ret = diskusage.beacon(config)
            self.assertNotEqual(ret, [{'diskusage': 50, 'mount': '/'}])

    def test_diskusage_match_regex(self):
        with patch('psutil.disk_partitions',
                   MagicMock(return_value=[STUB_DISK_PARTITION])), \
                patch('psutil.disk_usage',
                      MagicMock(return_value=STUB_DISK_USAGE)):
            config = [{r'^\/': '50%'}]

            ret = diskusage.validate(config)

            self.assertEqual(ret, (True, 'Valid beacon configuration'))

            ret = diskusage.beacon(config)
            self.assertEqual(ret, [{'diskusage': 50, 'mount': '/'}])