# coding=utf-8
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

# pytype: skip-file

from __future__ import absolute_import
from __future__ import print_function

import unittest

import mock

import apache_beam as beam
from apache_beam.examples.snippets.util import assert_matches_stdout
from apache_beam.testing.test_pipeline import TestPipeline

from . import withtimestamps


def check_plant_timestamps(actual):
  expected = '''[START plant_timestamps]
2020-04-01 00:00:00 - Strawberry
2020-06-01 00:00:00 - Carrot
2020-03-01 00:00:00 - Artichoke
2020-05-01 00:00:00 - Tomato
2020-09-01 00:00:00 - Potato
[END plant_timestamps]'''.splitlines()[1:-1]
  assert_matches_stdout(actual, expected)


def check_plant_events(actual):
  expected = '''[START plant_events]
1 - Strawberry
4 - Carrot
2 - Artichoke
3 - Tomato
5 - Potato
[END plant_events]'''.splitlines()[1:-1]
  assert_matches_stdout(actual, expected)


def check_plant_processing_times(actual):
  expected = '''[START plant_processing_times]
2020-03-20 20:12:42.145594 - Strawberry
2020-03-20 20:12:42.145827 - Carrot
2020-03-20 20:12:42.145962 - Artichoke
2020-03-20 20:12:42.146093 - Tomato
2020-03-20 20:12:42.146216 - Potato
[END plant_processing_times]'''.splitlines()[1:-1]

  # Since `time.time()` will always give something different, we'll
  # simply strip the timestamp information before testing the results.
  actual = actual | beam.Map(lambda row: row.split('-')[-1].strip())
  expected = [row.split('-')[-1].strip() for row in expected]
  assert_matches_stdout(actual, expected)


@mock.patch('apache_beam.Pipeline', TestPipeline)
@mock.patch(
    'apache_beam.examples.snippets.transforms.elementwise.withtimestamps.print',
    str)
class WithTimestampsTest(unittest.TestCase):
  def test_event_time(self):
    withtimestamps.withtimestamps_event_time(check_plant_timestamps)

  def test_logical_clock(self):
    withtimestamps.withtimestamps_logical_clock(check_plant_events)

  def test_processing_time(self):
    withtimestamps.withtimestamps_processing_time(check_plant_processing_times)

  def test_time_tuple2unix_time(self):
    unix_time = withtimestamps.time_tuple2unix_time()
    self.assertIsInstance(unix_time, float)

  def test_datetime2unix_time(self):
    unix_time = withtimestamps.datetime2unix_time()
    self.assertIsInstance(unix_time, float)


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