package com.dongni.collisionavoidance.webSocket.cache;

import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

/**
 * WebSocket消息缓存配置
 * 配置Redis用于缓存WebSocket消息，支持重连恢复
 */
@Configuration
@ConditionalOnProperty(name = "spring.redis.enabled", havingValue = "true", matchIfMissing = true)
public class CacheConfig {
    
    /**
     * 配置RedisTemplate用于WebSocket消息缓存
     * @param connectionFactory Redis连接工厂
     * @return 配置好的RedisTemplate
     */
    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(connectionFactory);
        
        // 使用String序列化器处理key
        template.setKeySerializer(new StringRedisSerializer());
        template.setHashKeySerializer(new StringRedisSerializer());
        
        // 使用JSON序列化器处理value，支持WebSocketMessage对象序列化
        GenericJackson2JsonRedisSerializer jsonSerializer = new GenericJackson2JsonRedisSerializer();
        template.setValueSerializer(jsonSerializer);
        template.setHashValueSerializer(jsonSerializer);
        
        // 启用事务支持
        template.setEnableTransactionSupport(true);
        
        template.afterPropertiesSet();
        return template;
    }
}