# Copyright 2013-2015 DataStax, Inc.
#
# 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.


try:
    import unittest2 as unittest
except ImportError:
    import unittest

from cassandra.query import BatchStatement
from cassandra.cluster import Cluster

from tests.integration import use_singledc, PROTOCOL_VERSION


def setup_module():
    use_singledc()


class ClientWarningTests(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        if PROTOCOL_VERSION < 4:
            return

        cls.cluster = Cluster(protocol_version=PROTOCOL_VERSION)
        cls.session = cls.cluster.connect()

        cls.session.execute("CREATE TABLE IF NOT EXISTS test1rf.client_warning (k int, v0 int, v1 int, PRIMARY KEY (k, v0))")
        cls.prepared = cls.session.prepare("INSERT INTO test1rf.client_warning (k, v0, v1) VALUES (?, ?, ?)")

        cls.warn_batch = BatchStatement()
        # 213 = 5 * 1024 / (4+4 + 4+4 + 4+4)
        #        thresh_kb/ (min param size)
        for x in range(213):
            cls.warn_batch.add(cls.prepared, (x, x, 1))

    @classmethod
    def tearDownClass(cls):
        if PROTOCOL_VERSION < 4:
            return

        cls.cluster.shutdown()

    def setUp(self):
        if PROTOCOL_VERSION < 4:
            raise unittest.SkipTest(
                "Native protocol 4,0+ is required for client warnings, currently using %r"
                % (PROTOCOL_VERSION,))

    def test_warning_basic(self):
        """
        Test to validate that client warnings can be surfaced

        @since 2.6.0
        @jira_ticket PYTHON-315
        @expected_result valid warnings returned
        @test_assumptions
            - batch_size_warn_threshold_in_kb: 5
        @test_category queries:client_warning
        """
        future = self.session.execute_async(self.warn_batch)
        future.result()
        self.assertEqual(len(future.warnings), 1)
        self.assertRegexpMatches(future.warnings[0], 'Batch.*exceeding.*')

    def test_warning_with_trace(self):
        """
        Test to validate client warning with tracing

        @since 2.6.0
        @jira_ticket PYTHON-315
        @expected_result valid warnings returned
        @test_assumptions
            - batch_size_warn_threshold_in_kb: 5
        @test_category queries:client_warning
        """
        future = self.session.execute_async(self.warn_batch, trace=True)
        future.result()
        self.assertEqual(len(future.warnings), 1)
        self.assertRegexpMatches(future.warnings[0], 'Batch.*exceeding.*')
        self.assertIsNotNone(future._query_trace)

    def test_warning_with_custom_payload(self):
        """
        Test to validate client warning with custom payload

        @since 2.6.0
        @jira_ticket PYTHON-315
        @expected_result valid warnings returned
        @test_assumptions
            - batch_size_warn_threshold_in_kb: 5
        @test_category queries:client_warning
        """
        payload = {'key': b'value'}
        future = self.session.execute_async(self.warn_batch, custom_payload=payload)
        future.result()
        self.assertEqual(len(future.warnings), 1)
        self.assertRegexpMatches(future.warnings[0], 'Batch.*exceeding.*')
        self.assertDictEqual(future.custom_payload, payload)

    def test_warning_with_trace_and_custom_payload(self):
        """
        Test to validate client warning with tracing and client warning

        @since 2.6.0
        @jira_ticket PYTHON-315
        @expected_result valid warnings returned
        @test_assumptions
            - batch_size_warn_threshold_in_kb: 5
        @test_category queries:client_warning
        """
        payload = {'key': b'value'}
        future = self.session.execute_async(self.warn_batch, trace=True, custom_payload=payload)
        future.result()
        self.assertEqual(len(future.warnings), 1)
        self.assertRegexpMatches(future.warnings[0], 'Batch.*exceeding.*')
        self.assertIsNotNone(future._query_trace)
        self.assertDictEqual(future.custom_payload, payload)