package com.example.oneul.infra.config;

import java.util.HashMap;
import java.util.Map;

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.common.serialization.StringDeserializer;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
import org.springframework.kafka.core.ConsumerFactory;
import org.springframework.kafka.core.DefaultKafkaConsumerFactory;
import org.springframework.kafka.support.serializer.JsonDeserializer;

import com.example.oneul.domain.post.domain.PostDocument;

@Configuration
public class KafkaConsumerConfig {
    @Value("${spring.kafka.bootstrap-servers}")
    private String bootstrapServers;

    @Value("${spring.kafka.consumer.group-id}")
    private String groupId;

    @Bean
    public ConsumerFactory<String, PostDocument> consumerFactory() {
        Map<String, Object> configs = new HashMap<>();
        configs.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
        configs.put(ConsumerConfig.GROUP_ID_CONFIG, groupId);

        return new DefaultKafkaConsumerFactory<>(configs,
                                                 new StringDeserializer(),
                                                 new JsonDeserializer<>(PostDocument.class));
    }

    @Bean
    public ConcurrentKafkaListenerContainerFactory<String, PostDocument> postListener() {
        ConcurrentKafkaListenerContainerFactory<String, PostDocument> factory = new ConcurrentKafkaListenerContainerFactory<>();
        factory.setConsumerFactory(consumerFactory());
        return factory;
    }
}