package com.zzsn.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectMapper.DefaultTyping;
import com.zzsn.constant.CacheConstant;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.*;

import javax.annotation.Resource;
import java.time.Duration;

import static java.util.Collections.singletonMap;

@Configuration
@EnableCaching // 开启缓存支持
public class RedisConfig extends CachingConfigurerSupport {

	@Resource
	private LettuceConnectionFactory lettuceConnectionFactory;

//	/**
//	 * @description 自定义的缓存key的生成策略 若想使用这个key
//	 *              只需要讲注解上keyGenerator的值设置为keyGenerator即可</br>
//	 * @return 自定义策略生成的key
//	 */
//	@Override
//	@Bean
//	public KeyGenerator keyGenerator() {
//		return new KeyGenerator() {
//			@Override
//			public Object generate(Object target, Method method, Object... params) {
//				StringBuilder sb = new StringBuilder();
//				sb.append(target.getClass().getName());
//				sb.append(method.getDeclaringClass().getName());
//				Arrays.stream(params).map(Object::toString).forEach(sb::append);
//				return sb.toString();
//			}
//		};
//	}

	/**
	 * RedisTemplate配置
	 *
	 * @param lettuceConnectionFactory
	 * @return
	 */
	@Bean
	public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory lettuceConnectionFactory) {
		// 设置序列化
		Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(Object.class);
		ObjectMapper om = new ObjectMapper();
		om.setVisibility(PropertyAccessor.ALL, Visibility.ANY);
		om.enableDefaultTyping(DefaultTyping.NON_FINAL);
		jackson2JsonRedisSerializer.setObjectMapper(om);
		// 配置redisTemplate
		RedisTemplate<String, Object> redisTemplate = new RedisTemplate<String, Object>();
		redisTemplate.setConnectionFactory(lettuceConnectionFactory);
		RedisSerializer<?> stringSerializer = new StringRedisSerializer();
		redisTemplate.setKeySerializer(stringSerializer);// key序列化
		redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);// value序列化
		redisTemplate.setHashKeySerializer(stringSerializer);// Hash key序列化
		redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);// Hash value序列化
		redisTemplate.afterPropertiesSet();
		return redisTemplate;
	}

	/**
	 * 缓存配置管理器
	 *
	 * @param factory
	 * @return
	 */
	@Bean
	public CacheManager cacheManager(LettuceConnectionFactory factory) {
        // 配置序列化（缓存默认有效期 6小时）
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofHours(6));
        RedisCacheConfiguration redisCacheConfiguration = config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
                												.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));
        
		// 以锁写入的方式创建RedisCacheWriter对象
		//RedisCacheWriter writer = RedisCacheWriter.lockingRedisCacheWriter(factory);
		// 创建默认缓存配置对象
		/* 默认配置，设置缓存有效期 1小时*/
		//RedisCacheConfiguration defaultCacheConfig = RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofHours(1));
		/* 自定义配置test:demo 的超时时间为 5分钟*/
		RedisCacheManager cacheManager = RedisCacheManager.builder(RedisCacheWriter.lockingRedisCacheWriter(factory)).cacheDefaults(redisCacheConfiguration)
				.withInitialCacheConfigurations(singletonMap(CacheConstant.TEST_DEMO_CACHE, RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofMinutes(5)).disableCachingNullValues()))
				.transactionAware().build();
		return cacheManager;
	}

}
