#! /usr/bin/env python3
# -*- coding: utf-8 -*-

import argparse
from pprint import pprint

# `pip install …`
import kafka  # … kafka-python


def main():
    parser = argparse.ArgumentParser(description="Kafka Producer client")
    parser.add_argument(
        "--server",
        type=str,
        metavar="HOST",
        default="localhost",
        help="Kafka bootstrap-server address",
    )
    parser.add_argument(
        "--port",
        type=int,
        metavar="PORT",
        default=9092,
        help="Kafka bootstrap-server port",
    )
    parser.add_argument(
        "--client",
        type=str,
        default="ch-kafka-python",
        help="custom client id for this producer",
    )
    parser.add_argument(
        "--topic", type=str, required=True, help="name of Kafka topic to store in"
    )
    parser.add_argument(
        "--group", type=str, required=True, help="name of the consumer group"
    )

    args = parser.parse_args()
    config = {
        "bootstrap_servers": f"{args.server}:{args.port}",
        "client_id": args.client,
        "group_id": args.group,
        "auto_offset_reset": "earliest",
    }
    client = kafka.KafkaConsumer(**config)

    client.subscribe([args.topic])
    pprint(client.poll(10000))
    client.unsubscribe()
    client.close()
    return 0


if __name__ == "__main__":
    exit(main())