#!/bin/bash
{{/*
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.
*/}}

function create_topic () {
    ./opt/kafka/bin/kafka-topics.sh \
        --create --topic $1 \
        --partitions $2 \
        --replication-factor $3 \
        --zookeeper $KAFKA_ZOOKEEPER_CONNECT
}

function describe_topic () {
    ./opt/kafka/bin/kafka-topics.sh \
        --describe --topic $1 \
        --zookeeper $KAFKA_ZOOKEEPER_CONNECT
}

function produce_message () {
    echo $2 | \
    ./opt/kafka/bin/kafka-console-producer.sh \
        --topic $1 \
        --broker-list $KAFKA_BROKERS
}

function consume_messages () {
    ./opt/kafka/bin/kafka-console-consumer.sh \
        --topic $1 \
        --timeout-ms 5000 \
        --from-beginning \
        --bootstrap-server $KAFKA_BROKERS
}

function delete_partition_messages () {
    ./opt/kafka/bin/kafka-delete-records.sh \
        --offset-json-file $1 \
        --bootstrap-server $KAFKA_BROKERS
}

function delete_topic () {
    ./opt/kafka/bin/kafka-topics.sh \
        --delete --topic $1 \
        --zookeeper $KAFKA_ZOOKEEPER_CONNECT
}

set -ex

TOPIC="kafka-test"
PARTITION_COUNT=3
PARTITION_REPLICAS=2

echo "Creating topic $TOPIC"
create_topic $TOPIC $PARTITION_COUNT $PARTITION_REPLICAS
describe_topic $TOPIC

# Note: The commands used here are not playing well with the WIP
# SASL auth implementation. Commenting for now:

# echo "Producing 5 messages"
# for i in {1..5}; do
#     MESSAGE="Message #$i"
#     produce_message $TOPIC "$MESSAGE"
# done

# echo -e "\nConsuming messages (A \"TimeoutException\" is expected, else this would consume forever)"
# consume_messages $TOPIC

# echo "Producing 5 more messages"
# for i in {6..10}; do
#     MESSAGE="Message #$i"
#     produce_message $TOPIC "$MESSAGE"
# done

# echo -e "\nCreating partition offset reset json file"
# tee /tmp/partition_offsets.json << EOF
# {
# "partitions": [
#     {
#         "topic": "$TOPIC",
#         "partition": 0,
#         "offset": -1
#     }, {
#         "topic": "$TOPIC",
#         "partition": 1,
#         "offset": -1
#     }, {
#         "topic": "$TOPIC",
#         "partition": 2,
#         "offset": -1
#     }
# ],
# "version": 1
# }
# EOF

# echo "Resetting $TOPIC partitions (deleting messages)"
# delete_partition_messages /tmp/partition_offsets.json

echo "Deleting topic $TOPIC"
delete_topic $TOPIC >> /tmp/deletion

cat /tmp/deletion

if [ $(cat /tmp/deletion | grep 'marked for deletion' | wc -l) -eq 1 ]
then
    echo "Topic $TOPIC was deleted successfully."
    exit 0
else
    echo "Topic $TOPIC was not successfully deleted."
    exit 1
fi