# Copyright The OpenTelemetry Authors
#
# Licensed 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.
from unittest import mock

import redis

from opentelemetry.instrumentation.redis import RedisInstrumentor
from opentelemetry.test.test_base import TestBase
from opentelemetry.trace import SpanKind


class TestRedis(TestBase):
    def test_span_properties(self):
        redis_client = redis.Redis()
        RedisInstrumentor().instrument(tracer_provider=self.tracer_provider)

        with mock.patch.object(redis_client, "connection"):
            redis_client.get("key")

        spans = self.memory_exporter.get_finished_spans()
        self.assertEqual(len(spans), 1)
        span = spans[0]
        self.assertEqual(span.name, "GET")
        self.assertEqual(span.kind, SpanKind.CLIENT)

    def test_not_recording(self):
        redis_client = redis.Redis()
        RedisInstrumentor().instrument(tracer_provider=self.tracer_provider)

        mock_tracer = mock.Mock()
        mock_span = mock.Mock()
        mock_span.is_recording.return_value = False
        mock_tracer.start_span.return_value = mock_span
        mock_tracer.use_span.return_value.__enter__ = mock_span
        mock_tracer.use_span.return_value.__exit__ = True
        with mock.patch("opentelemetry.trace.get_tracer") as tracer:
            with mock.patch.object(redis_client, "connection"):
                tracer.return_value = mock_tracer
                redis_client.get("key")
                self.assertFalse(mock_span.is_recording())
                self.assertTrue(mock_span.is_recording.called)
                self.assertFalse(mock_span.set_attribute.called)
                self.assertFalse(mock_span.set_status.called)

    def test_instrument_uninstrument(self):
        redis_client = redis.Redis()
        RedisInstrumentor().instrument(tracer_provider=self.tracer_provider)

        with mock.patch.object(redis_client, "connection"):
            redis_client.get("key")

        spans = self.memory_exporter.get_finished_spans()
        self.assertEqual(len(spans), 1)
        self.memory_exporter.clear()

        # Test uninstrument
        RedisInstrumentor().uninstrument()

        with mock.patch.object(redis_client, "connection"):
            redis_client.get("key")

        spans = self.memory_exporter.get_finished_spans()
        self.assertEqual(len(spans), 0)
        self.memory_exporter.clear()

        # Test instrument again
        RedisInstrumentor().instrument()

        with mock.patch.object(redis_client, "connection"):
            redis_client.get("key")

        spans = self.memory_exporter.get_finished_spans()
        self.assertEqual(len(spans), 1)