#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2024 Confluent 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.
#

import os
from confluent_kafka import Consumer

_GROUP_PROTOCOL_ENV = 'TEST_CONSUMER_GROUP_PROTOCOL'
_TRIVUP_CLUSTER_TYPE_ENV = 'TEST_TRIVUP_CLUSTER_TYPE'


def _trivup_cluster_type_kraft():
    return _TRIVUP_CLUSTER_TYPE_ENV in os.environ and os.environ[_TRIVUP_CLUSTER_TYPE_ENV] == 'kraft'


class TestUtils:
    @staticmethod
    def broker_version():
        return '4.0.0' if TestUtils.use_group_protocol_consumer() else '3.9.0'

    @staticmethod
    def broker_conf():
        broker_conf = ['transaction.state.log.replication.factor=1',
                       'transaction.state.log.min.isr=1']
        if TestUtils.use_group_protocol_consumer():
            broker_conf.append('group.coordinator.rebalance.protocols=classic,consumer')
        return broker_conf

    @staticmethod
    def _broker_major_version():
        return int(TestUtils.broker_version().split('.')[0])

    @staticmethod
    def use_kraft():
        return (TestUtils.use_group_protocol_consumer() or
                _trivup_cluster_type_kraft())

    @staticmethod
    def use_group_protocol_consumer():
        return _GROUP_PROTOCOL_ENV in os.environ and os.environ[_GROUP_PROTOCOL_ENV] == 'consumer'

    @staticmethod
    def update_conf_group_protocol(conf=None):
        if TestUtils.can_upgrade_group_protocol_to_consumer(conf):
            conf['group.protocol'] = 'consumer'

    @staticmethod
    def can_upgrade_group_protocol_to_consumer(conf):
        return (conf is not None and 'group.id' in conf and
                'group.protocol' not in conf and TestUtils.use_group_protocol_consumer())

    @staticmethod
    def remove_forbidden_conf_group_protocol_consumer(conf):
        if (conf is None or
                not TestUtils.use_group_protocol_consumer() or
                conf.get('group.protocol', 'consumer') != 'consumer'):
            return
        forbidden_conf_properties = ["session.timeout.ms",
                                     "partition.assignment.strategy",
                                     "heartbeat.interval.ms",
                                     "group.protocol.type"]
        for prop in forbidden_conf_properties:
            if prop in conf:
                print(f"Skipping setting forbidden configuration {prop} for `CONSUMER` protocol")
                del conf[prop]


class TestConsumer(Consumer):
    def __init__(self, conf=None, **kwargs):
        TestUtils.update_conf_group_protocol(conf)
        TestUtils.remove_forbidden_conf_group_protocol_consumer(conf)
        super(TestConsumer, self).__init__(conf, **kwargs)

    def assign(self, partitions):
        if TestUtils.use_group_protocol_consumer():
            super(TestConsumer, self).incremental_assign(partitions)
        else:
            super(TestConsumer, self).assign(partitions)

    def unassign(self, partitions):
        if TestUtils.use_group_protocol_consumer():
            super(TestConsumer, self).incremental_unassign(partitions)
        else:
            super(TestConsumer, self).unassign()