#!/usr/bin/env python3
#
# Copyright (C) 2018-2023 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import os
import tempfile
import unittest
import importlib
import json

from vyos import ConfigError

try:
    task_scheduler = importlib.import_module("src.conf_mode.system_task-scheduler")
except ModuleNotFoundError:  # for unittest.main()
    import sys
    sys.path.append(os.path.join(os.path.dirname(__file__), '../..'))
    task_scheduler = importlib.import_module("src.conf_mode.system_task-scheduler")

class TestUpdateCrontab(unittest.TestCase):

    def test_verify(self):
        tests = [
            {'name': 'one_task',
             'tasks': [{'name': 'aaa', 'interval': '60m', 'spec': '', 'executable': '/bin/ls', 'args': '-l'}],
             'expected': None
             },
            {'name': 'has_interval_and_spec',
             'tasks': [{'name': 'aaa', 'interval': '60m', 'spec': '0 * * * *', 'executable': '/bin/ls', 'args': '-l'}],
             'expected': ConfigError
             },
            {'name': 'has_no_interval_and_spec',
             'tasks': [{'name': 'aaa', 'interval': '', 'spec': '', 'executable': '/bin/ls', 'args': '-l'}],
             'expected': ConfigError
             },
            {'name': 'invalid_interval',
             'tasks': [{'name': 'aaa', 'interval': '1y', 'spec': '', 'executable': '/bin/ls', 'args': '-l'}],
             'expected': ConfigError
             },
            {'name': 'invalid_interval_min',
             'tasks': [{'name': 'aaa', 'interval': '61m', 'spec': '', 'executable': '/bin/ls', 'args': '-l'}],
             'expected': ConfigError
             },
            {'name': 'invalid_interval_hour',
             'tasks': [{'name': 'aaa', 'interval': '25h', 'spec': '', 'executable': '/bin/ls', 'args': '-l'}],
             'expected': ConfigError
             },
            {'name': 'invalid_interval_day',
             'tasks': [{'name': 'aaa', 'interval': '32d', 'spec': '', 'executable': '/bin/ls', 'args': '-l'}],
             'expected': ConfigError
             },
            {'name': 'no_executable',
             'tasks': [{'name': 'aaa', 'interval': '60m', 'spec': '', 'executable': '', 'args': ''}],
             'expected': ConfigError
             },
            {'name': 'invalid_executable',
             'tasks': [{'name': 'aaa', 'interval': '60m', 'spec': '', 'executable': '/bin/aaa', 'args': ''}],
             'expected': ConfigError
             }
        ]
        for t in tests:
            with self.subTest(msg=t['name'], tasks=t['tasks'], expected=t['expected']):
                if t['expected'] is not None:
                    with self.assertRaises(t['expected']):
                        task_scheduler.verify(t['tasks'])
                else:
                    task_scheduler.verify(t['tasks'])

    def test_generate(self):
        tests = [
            {'name': 'zero_task',
             'tasks': [],
             'expected': []
             },
            {'name': 'one_task',
             'tasks': [{'name': 'aaa', 'interval': '60m', 'spec': '', 'executable': '/bin/ls', 'args': '-l'}],
             'expected': [
                 '### Generated by vyos-update-crontab.py ###',
                 '*/60 * * * * root sg vyattacfg \"/bin/ls -l\"']
             },
            {'name': 'one_task_with_hour',
             'tasks': [{'name': 'aaa', 'interval': '10h', 'spec': '', 'executable': '/bin/ls', 'args': '-l'}],
             'expected': [
                 '### Generated by vyos-update-crontab.py ###',
                 '0 */10 * * * root sg vyattacfg \"/bin/ls -l\"']
             },
            {'name': 'one_task_with_day',
             'tasks': [{'name': 'aaa', 'interval': '10d', 'spec': '', 'executable': '/bin/ls', 'args': '-l'}],
             'expected': [
                 '### Generated by vyos-update-crontab.py ###',
                 '0 0 */10 * * root sg vyattacfg \"/bin/ls -l\"']
             },
            {'name': 'multiple_tasks',
             'tasks': [{'name': 'aaa', 'interval': '60m', 'spec': '', 'executable': '/bin/ls', 'args': '-l'},
                       {'name': 'bbb', 'interval': '', 'spec': '0 0 * * *', 'executable': '/bin/ls', 'args': '-ltr'}
                       ],
             'expected': [
                 '### Generated by vyos-update-crontab.py ###',
                 '*/60 * * * * root sg vyattacfg \"/bin/ls -l\"',
                 '0 0 * * * root sg vyattacfg \"/bin/ls -ltr\"']
             }
        ]
        for t in tests:
            with self.subTest(msg=t['name'], tasks=t['tasks'], expected=t['expected']):
                task_scheduler.crontab_file = tempfile.mkstemp()[1]
                task_scheduler.generate(t['tasks'])
                if len(t['expected']) > 0:
                    self.assertTrue(os.path.isfile(task_scheduler.crontab_file))
                    with open(task_scheduler.crontab_file) as f:
                        actual = f.read()
                        self.assertEqual(t['expected'], actual.splitlines())
                    os.remove(task_scheduler.crontab_file)
                else:
                    self.assertFalse(os.path.isfile(task_scheduler.crontab_file))


if __name__ == "__main__":
    unittest.main()