#
# 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.
#

"""
Tests corresponding to the DataflowRunner implementation of MetricsResult,
the DataflowMetrics class.
"""

# pytype: skip-file

from __future__ import absolute_import

import types
import unittest
from builtins import object

import mock

from apache_beam.metrics.cells import DistributionData
from apache_beam.metrics.cells import DistributionResult
from apache_beam.metrics.execution import MetricKey
from apache_beam.metrics.execution import MetricResult
from apache_beam.metrics.metricbase import MetricName
from apache_beam.runners.dataflow import dataflow_metrics
from apache_beam.testing import metric_result_matchers
from apache_beam.testing.metric_result_matchers import MetricResultMatcher


class DictToObject(object):
  """Translate from a dict(list()) structure to an object structure"""
  def __init__(self, data):
    for name, value in data.items():
      setattr(self, name, self._wrap(value))

  def _wrap(self, value):
    if isinstance(value, (tuple, list, set, frozenset)):
      return type(value)([self._wrap(v) for v in value])
    return DictToObject(value) if isinstance(value, dict) else value


class TestDataflowMetrics(unittest.TestCase):

  # TODO(BEAM-6734): Write a dump tool to generate this fake data, or
  # somehow make this easier to maintain.
  ONLY_COUNTERS_LIST = {
      "metrics": [
          {
              "name": {
                  "context": {
                      "additionalProperties": [{
                          "key": "namespace",
                          "value": "__main__.WordExtractingDoFn"
                      }, {
                          "key": "step", "value": "s2"
                      },
                                               {
                                                   "key": "tentative",
                                                   "value": "true"
                                               }]
                  },
                  "name": "words",
                  "origin": "user"
              },
              "scalar": {
                  "integer_value": 26185
              },
              "distribution": None,
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
          {
              "name": {
                  "context": {
                      "additionalProperties": [{
                          "key": "namespace",
                          "value": "__main__.WordExtractingDoFn"
                      }, {
                          "key": "step", "value": "s2"
                      }]
                  },
                  "name": "words",
                  "origin": "user"
              },
              "scalar": {
                  "integer_value": 26181
              },
              "distribution": None,
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
          {
              "name": {
                  "context": {
                      "additionalProperties": [{
                          "key": "namespace",
                          "value": "__main__.WordExtractingDoFn"
                      }, {
                          "key": "step", "value": "s2"
                      },
                                               {
                                                   "key": "tentative",
                                                   "value": "true"
                                               }]
                  },
                  "name": "empty_lines",
                  "origin": "user"
              },
              "scalar": {
                  "integer_value": 1080
              },
              "distribution": None,
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
          {
              "name": {
                  "context": {
                      "additionalProperties": [{
                          "key": "namespace",
                          "value": "__main__.WordExtractingDoFn"
                      }, {
                          "key": "step", "value": "s2"
                      }]
                  },
                  "name": "empty_lines",
                  "origin": "user"
              },
              "scalar": {
                  "integer_value": 1080
              },
              "distribution": None,
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
      ]
  }
  STRUCTURED_COUNTER_LIST = {
      "metrics": [
          {
              "name": {
                  "context": {
                      "additionalProperties": [{
                          "key": "namespace",
                          "value": "__main__.WordExtractingDoFn"
                      }, {
                          "key": "step", "value": "s2"
                      },
                                               {
                                                   "key": "tentative",
                                                   "value": "true"
                                               }]
                  },
                  "name": "word_lengths",
                  "origin": "user"
              },
              "scalar": {
                  "integer_value": 109475
              },
              "distribution": None,
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
          {
              "name": {
                  "context": {
                      "additionalProperties": [{
                          "key": "namespace",
                          "value": "__main__.WordExtractingDoFn"
                      }, {
                          "key": "step", "value": "s2"
                      }]
                  },
                  "name": "word_lengths",
                  "origin": "user"
              },
              "scalar": {
                  "integer_value": 109475
              },
              "distribution": None,
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
          {
              "name": {
                  "context": {
                      "additionalProperties": [{
                          "key": "namespace",
                          "value": "__main__.WordExtractingDoFn"
                      }, {
                          "key": "step", "value": "s2"
                      },
                                               {
                                                   "key": "tentative",
                                                   "value": "true"
                                               }]
                  },
                  "name": "word_length_dist",
                  "origin": "user"
              },
              "scalar": None,
              "distribution": {
                  "object_value": {
                      "properties": [
                          {
                              "key": "min", "value": {
                                  "integer_value": 2
                              }
                          },
                          {
                              "key": "max", "value": {
                                  "integer_value": 16
                              }
                          },
                          {
                              "key": "count", "value": {
                                  "integer_value": 2
                              }
                          },
                          {
                              "key": "mean", "value": {
                                  "integer_value": 9
                              }
                          },
                          {
                              "key": "sum", "value": {
                                  "integer_value": 18
                              }
                          },
                      ]
                  }
              },
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
          {
              "name": {
                  "context": {
                      "additionalProperties": [{
                          "key": "namespace",
                          "value": "__main__.WordExtractingDoFn"
                      }, {
                          "key": "step", "value": "s2"
                      }]
                  },
                  "name": "word_length_dist",
                  "origin": "user"
              },
              "scalar": None,
              "distribution": {
                  "object_value": {
                      "properties": [
                          {
                              "key": "min", "value": {
                                  "integer_value": 2
                              }
                          },
                          {
                              "key": "max", "value": {
                                  "integer_value": 16
                              }
                          },
                          {
                              "key": "count", "value": {
                                  "integer_value": 2
                              }
                          },
                          {
                              "key": "mean", "value": {
                                  "integer_value": 9
                              }
                          },
                          {
                              "key": "sum", "value": {
                                  "integer_value": 18
                              }
                          },
                      ]
                  }
              },
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
      ]
  }
  SYSTEM_COUNTERS_LIST = {
      "metrics": [
          # ElementCount
          {
              "name": {
                  "context": {
                      "additionalProperties": [
                          {
                              "key": "original_name",
                              "value":
                                  "ToIsmRecordForMultimap-out0-ElementCount"
                          },  # yapf: disable
                          {
                              "key": "output_user_name",
                              "value": "ToIsmRecordForMultimap-out0"
                          }
                      ]
                  },
                  "name": "ElementCount",
                  "origin": "dataflow/v1b3"
              },
              "scalar": {
                  "integer_value": 42
              },
              "distribution": None,
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
          {
              "name": {
                  "context": {
                      "additionalProperties": [
                          {
                              "key": "original_name",
                              "value":
                                  "ToIsmRecordForMultimap-out0-ElementCount"
                          },  # yapf: disable
                          {
                              "key": "output_user_name",
                              "value": "ToIsmRecordForMultimap-out0"
                          }, {
                              "key": "tentative", "value": "true"
                          }
                      ]
                  },
                  "name": "ElementCount",
                  "origin": "dataflow/v1b3"
              },
              "scalar": {
                  "integer_value": 42
              },
              "distribution": None,
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
          # MeanByteCount
          {
              "name": {
                  "context": {
                      "additionalProperties": [
                          {
                              "key": "original_name",
                              "value": "Read-out0-MeanByteCount"
                          },
                          {
                              "key": "output_user_name",
                              "value": "GroupByKey/Read-out0"
                          }
                      ]
                  },
                  "name": "MeanByteCount",
                  "origin": "dataflow/v1b3"
              },
              "scalar": {
                  "integer_value": 31
              },
              "distribution": None,
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
          {
              "name": {
                  "context": {
                      "additionalProperties": [
                          {
                              "key": "original_name",
                              "value": "Read-out0-MeanByteCount"
                          },
                          {
                              "key": "output_user_name",
                              "value": "GroupByKey/Read-out0"
                          }, {
                              "key": "tentative", "value": "true"
                          }
                      ]
                  },
                  "name": "MeanByteCount",
                  "origin": "dataflow/v1b3"
              },
              "scalar": {
                  "integer_value": 31
              },
              "distribution": None,
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
          # ExecutionTime
          {
              "name": {
                  "context": {
                      "additionalProperties": [
                          {
                              "key": "step", "value": "write/Write/Write"
                          },
                      ]
                  },
                  "name": "ExecutionTime_ProcessElement",
                  "origin": "dataflow/v1b3"
              },
              "scalar": {
                  "integer_value": 1000
              },
              "distribution": None,
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
          {
              "name": {
                  "context": {
                      "additionalProperties": [{
                          "key": "step", "value": "write/Write/Write"
                      },
                                               {
                                                   "key": "tentative",
                                                   "value": "true"
                                               }]
                  },
                  "name": "ExecutionTime_ProcessElement",
                  "origin": "dataflow/v1b3"
              },
              "scalar": {
                  "integer_value": 1000
              },
              "distribution": None,
              "updateTime": "2017-03-22T18:47:06.402Z"
          },
      ]
  }

  def setup_mock_client_result(self, counter_list=None):
    mock_client = mock.Mock()
    mock_query_result = DictToObject(counter_list)
    mock_client.get_job_metrics.return_value = mock_query_result
    mock_job_result = mock.Mock()
    mock_job_result.job_id.return_value = 1
    mock_job_result.is_in_terminal_state.return_value = False
    return mock_client, mock_job_result

  def test_cache_functions(self):
    mock_client, mock_job_result = self.setup_mock_client_result(
        self.STRUCTURED_COUNTER_LIST)
    dm = dataflow_metrics.DataflowMetrics(mock_client, mock_job_result)

    # At first creation, we should always query dataflow.
    self.assertTrue(dm._cached_metrics is None)

    # Right after querying, we still query again.
    dm.query()
    self.assertTrue(dm._cached_metrics is None)

    # The job has ended. The query should not run again after this.
    mock_job_result.is_in_terminal_state.return_value = True
    dm.query()
    self.assertTrue(dm._cached_metrics)

  def test_query_structured_metrics(self):
    mock_client, mock_job_result = self.setup_mock_client_result(
        self.STRUCTURED_COUNTER_LIST)
    dm = dataflow_metrics.DataflowMetrics(mock_client, mock_job_result)
    dm._translate_step_name = types.MethodType(lambda self, x: 'split', dm)
    query_result = dm.query()
    expected_counters = [
        MetricResult(
            MetricKey(
                'split',
                MetricName('__main__.WordExtractingDoFn', 'word_lengths'),
            ),
            109475,
            109475),
    ]
    self.assertEqual(query_result['counters'], expected_counters)

    expected_distributions = [
        MetricResult(
            MetricKey(
                'split',
                MetricName('__main__.WordExtractingDoFn', 'word_length_dist'),
            ),
            DistributionResult(DistributionData(18, 2, 2, 16)),
            DistributionResult(DistributionData(18, 2, 2, 16))),
    ]
    self.assertEqual(query_result['distributions'], expected_distributions)

  def test_query_counters(self):
    mock_client, mock_job_result = self.setup_mock_client_result(
        self.ONLY_COUNTERS_LIST)
    dm = dataflow_metrics.DataflowMetrics(mock_client, mock_job_result)
    dm._translate_step_name = types.MethodType(lambda self, x: 'split', dm)
    query_result = dm.query()
    expected_counters = [
        MetricResult(
            MetricKey(
                'split',
                MetricName('__main__.WordExtractingDoFn', 'empty_lines')),
            1080,
            1080),
        MetricResult(
            MetricKey(
                'split', MetricName('__main__.WordExtractingDoFn', 'words')),
            26181,
            26185),
    ]
    self.assertEqual(
        sorted(query_result['counters'], key=lambda x: x.key.metric.name),
        sorted(expected_counters, key=lambda x: x.key.metric.name))

  def test_system_counters_set_labels_and_step_name(self):
    mock_client, mock_job_result = self.setup_mock_client_result(
        self.SYSTEM_COUNTERS_LIST)
    test_object = dataflow_metrics.DataflowMetrics(mock_client, mock_job_result)
    all_metrics = test_object.all_metrics()

    matchers = [
        MetricResultMatcher(
            name='ElementCount',
            labels={
                'original_name': 'ToIsmRecordForMultimap-out0-ElementCount',
                'output_user_name': 'ToIsmRecordForMultimap-out0'
            },
            attempted=42,
            committed=42),
        MetricResultMatcher(
            name='MeanByteCount',
            labels={
                'original_name': 'Read-out0-MeanByteCount',
                'output_user_name': 'GroupByKey/Read-out0'
            },
            attempted=31,
            committed=31),
        MetricResultMatcher(
            name='ExecutionTime_ProcessElement',
            step='write/Write/Write',
            attempted=1000,
            committed=1000)
    ]
    errors = metric_result_matchers.verify_all(all_metrics, matchers)
    self.assertFalse(errors, errors)


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