# 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.


import logging
from unittest import mock

from opentelemetry import trace as trace_api
from opentelemetry.instrumentation import dbapi
from opentelemetry.test.test_base import TestBase


class TestDBApiIntegration(TestBase):
    def setUp(self):
        super().setUp()
        self.tracer = self.tracer_provider.get_tracer(__name__)

    def test_span_succeeded(self):
        connection_props = {
            "database": "testdatabase",
            "server_host": "testhost",
            "server_port": 123,
            "user": "testuser",
        }
        connection_attributes = {
            "database": "database",
            "port": "server_port",
            "host": "server_host",
            "user": "user",
        }
        db_integration = dbapi.DatabaseApiIntegration(
            self.tracer, "testcomponent", "testtype", connection_attributes
        )
        mock_connection = db_integration.wrapped_connection(
            mock_connect, {}, connection_props
        )
        cursor = mock_connection.cursor()
        cursor.execute("Test query", ("param1Value", False))
        spans_list = self.memory_exporter.get_finished_spans()
        self.assertEqual(len(spans_list), 1)
        span = spans_list[0]
        self.assertEqual(span.name, "testcomponent.testdatabase")
        self.assertIs(span.kind, trace_api.SpanKind.CLIENT)

        self.assertEqual(span.attributes["component"], "testcomponent")
        self.assertEqual(span.attributes["db.type"], "testtype")
        self.assertEqual(span.attributes["db.instance"], "testdatabase")
        self.assertEqual(span.attributes["db.statement"], "Test query")
        self.assertFalse("db.statement.parameters" in span.attributes)
        self.assertEqual(span.attributes["db.user"], "testuser")
        self.assertEqual(span.attributes["net.peer.name"], "testhost")
        self.assertEqual(span.attributes["net.peer.port"], 123)
        self.assertIs(
            span.status.status_code, trace_api.status.StatusCode.UNSET,
        )

    def test_span_succeeded_with_capture_of_statement_parameters(self):
        connection_props = {
            "database": "testdatabase",
            "server_host": "testhost",
            "server_port": 123,
            "user": "testuser",
        }
        connection_attributes = {
            "database": "database",
            "port": "server_port",
            "host": "server_host",
            "user": "user",
        }
        db_integration = dbapi.DatabaseApiIntegration(
            self.tracer,
            "testcomponent",
            "testtype",
            connection_attributes,
            capture_parameters=True,
        )
        mock_connection = db_integration.wrapped_connection(
            mock_connect, {}, connection_props
        )
        cursor = mock_connection.cursor()
        cursor.execute("Test query", ("param1Value", False))
        spans_list = self.memory_exporter.get_finished_spans()
        self.assertEqual(len(spans_list), 1)
        span = spans_list[0]
        self.assertEqual(span.name, "testcomponent.testdatabase")
        self.assertIs(span.kind, trace_api.SpanKind.CLIENT)

        self.assertEqual(span.attributes["component"], "testcomponent")
        self.assertEqual(span.attributes["db.type"], "testtype")
        self.assertEqual(span.attributes["db.instance"], "testdatabase")
        self.assertEqual(span.attributes["db.statement"], "Test query")
        self.assertEqual(
            span.attributes["db.statement.parameters"],
            "('param1Value', False)",
        )
        self.assertEqual(span.attributes["db.user"], "testuser")
        self.assertEqual(span.attributes["net.peer.name"], "testhost")
        self.assertEqual(span.attributes["net.peer.port"], 123)
        self.assertIs(
            span.status.status_code, trace_api.status.StatusCode.UNSET,
        )

    def test_span_not_recording(self):
        connection_props = {
            "database": "testdatabase",
            "server_host": "testhost",
            "server_port": 123,
            "user": "testuser",
        }
        connection_attributes = {
            "database": "database",
            "port": "server_port",
            "host": "server_host",
            "user": "user",
        }
        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
        db_integration = dbapi.DatabaseApiIntegration(
            mock_tracer, "testcomponent", "testtype", connection_attributes
        )
        mock_connection = db_integration.wrapped_connection(
            mock_connect, {}, connection_props
        )
        cursor = mock_connection.cursor()
        cursor.execute("Test query", ("param1Value", False))
        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_span_failed(self):
        db_integration = dbapi.DatabaseApiIntegration(
            self.tracer, "testcomponent"
        )
        mock_connection = db_integration.wrapped_connection(
            mock_connect, {}, {}
        )
        cursor = mock_connection.cursor()
        with self.assertRaises(Exception):
            cursor.execute("Test query", throw_exception=True)

        spans_list = self.memory_exporter.get_finished_spans()
        self.assertEqual(len(spans_list), 1)
        span = spans_list[0]
        self.assertEqual(span.attributes["db.statement"], "Test query")
        self.assertIs(
            span.status.status_code, trace_api.status.StatusCode.ERROR,
        )
        self.assertEqual(span.status.description, "Test Exception")

    def test_executemany(self):
        db_integration = dbapi.DatabaseApiIntegration(
            self.tracer, "testcomponent"
        )
        mock_connection = db_integration.wrapped_connection(
            mock_connect, {}, {}
        )
        cursor = mock_connection.cursor()
        cursor.executemany("Test query")
        spans_list = self.memory_exporter.get_finished_spans()
        self.assertEqual(len(spans_list), 1)
        span = spans_list[0]
        self.assertEqual(span.attributes["db.statement"], "Test query")

    def test_callproc(self):
        db_integration = dbapi.DatabaseApiIntegration(
            self.tracer, "testcomponent"
        )
        mock_connection = db_integration.wrapped_connection(
            mock_connect, {}, {}
        )
        cursor = mock_connection.cursor()
        cursor.callproc("Test stored procedure")
        spans_list = self.memory_exporter.get_finished_spans()
        self.assertEqual(len(spans_list), 1)
        span = spans_list[0]
        self.assertEqual(
            span.attributes["db.statement"], "Test stored procedure"
        )

    @mock.patch("opentelemetry.instrumentation.dbapi")
    def test_wrap_connect(self, mock_dbapi):
        dbapi.wrap_connect(self.tracer, mock_dbapi, "connect", "-")
        connection = mock_dbapi.connect()
        self.assertEqual(mock_dbapi.connect.call_count, 1)
        self.assertIsInstance(connection.__wrapped__, mock.Mock)

    @mock.patch("opentelemetry.instrumentation.dbapi")
    def test_unwrap_connect(self, mock_dbapi):
        dbapi.wrap_connect(self.tracer, mock_dbapi, "connect", "-")
        connection = mock_dbapi.connect()
        self.assertEqual(mock_dbapi.connect.call_count, 1)

        dbapi.unwrap_connect(mock_dbapi, "connect")
        connection = mock_dbapi.connect()
        self.assertEqual(mock_dbapi.connect.call_count, 2)
        self.assertIsInstance(connection, mock.Mock)

    def test_instrument_connection(self):
        connection = mock.Mock()
        # Avoid get_attributes failing because can't concatenate mock
        connection.database = "-"
        connection2 = dbapi.instrument_connection(self.tracer, connection, "-")
        self.assertIs(connection2.__wrapped__, connection)

    def test_uninstrument_connection(self):
        connection = mock.Mock()
        # Set connection.database to avoid a failure because mock can't
        # be concatenated
        connection.database = "-"
        connection2 = dbapi.instrument_connection(self.tracer, connection, "-")
        self.assertIs(connection2.__wrapped__, connection)

        connection3 = dbapi.uninstrument_connection(connection2)
        self.assertIs(connection3, connection)

        with self.assertLogs(level=logging.WARNING):
            connection4 = dbapi.uninstrument_connection(connection)
        self.assertIs(connection4, connection)


# pylint: disable=unused-argument
def mock_connect(*args, **kwargs):
    database = kwargs.get("database")
    server_host = kwargs.get("server_host")
    server_port = kwargs.get("server_port")
    user = kwargs.get("user")
    return MockConnection(database, server_port, server_host, user)


class MockConnection:
    def __init__(self, database, server_port, server_host, user):
        self.database = database
        self.server_port = server_port
        self.server_host = server_host
        self.user = user

    # pylint: disable=no-self-use
    def cursor(self):
        return MockCursor()


class MockCursor:
    # pylint: disable=unused-argument, no-self-use
    def execute(self, query, params=None, throw_exception=False):
        if throw_exception:
            raise Exception("Test Exception")

    # pylint: disable=unused-argument, no-self-use
    def executemany(self, query, params=None, throw_exception=False):
        if throw_exception:
            raise Exception("Test Exception")

    # pylint: disable=unused-argument, no-self-use
    def callproc(self, query, params=None, throw_exception=False):
        if throw_exception:
            raise Exception("Test Exception")