/**
 * Copyright (C) 2018-2022
 * All rights reserved, Designed By www.yixiang.co

 */
package co.yixiang.config;

import cn.hutool.core.lang.Assert;
import co.yixiang.utils.StringUtils;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.data.redis.RedisProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cache.Cache;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.CacheErrorHandler;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;

import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.time.Duration;
import java.util.HashMap;
import java.util.Map;

/**
 * @author Zheng Jie
 * @date 2018-11-24
 */
@Slf4j
@Configuration
//@EnableConfigurationProperties(RedisProperties.class)
public class RedisConfig  {

    /**
     *  设置 redis 数据默认过期时间，默认2小时
     *  设置@cacheable 序列化方式
     */
    @Bean
    public RedisCacheConfiguration redisCacheConfiguration(){
        FastJsonRedisSerializer<Object> fastJsonRedisSerializer = new FastJsonRedisSerializer<>(Object.class);
        RedisCacheConfiguration configuration = RedisCacheConfiguration.defaultCacheConfig();
        configuration = configuration.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(fastJsonRedisSerializer)).entryTtl(Duration.ofHours(2));
        return configuration;
    }

    @Bean(name = "redisTemplate")
    // @ConditionalOnMissingBean(name = "redisTemplate")
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        //序列化
        FastJsonRedisSerializer<Object> fastJsonRedisSerializer = new FastJsonRedisSerializer<>(Object.class);
        // value值的序列化采用fastJsonRedisSerializer
        template.setValueSerializer(fastJsonRedisSerializer);
        template.setHashValueSerializer(fastJsonRedisSerializer);
        // 全局开启AutoType，这里方便开发，使用全局的方式
        ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
        // 建议使用这种方式，小范围指定白名单
        // ParserConfig.getGlobalInstance().addAccept("me.zhengjie.domain");
        // key的序列化采用StringRedisSerializer
        template.setKeySerializer(new StringKeyRedisSerializer());
        template.setHashKeySerializer(new StringKeyRedisSerializer());
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }



}

/**
 * Value 序列化
 *
 * @author /
 * @param <T>
 */
 class FastJsonRedisSerializer<T> implements RedisSerializer<T> {

    private final Class<T> clazz;

    FastJsonRedisSerializer(Class<T> clazz) {
        super();
        this.clazz = clazz;
    }

    @Override
    public byte[] serialize(T t) {
        if (t == null) {
            return new byte[0];
        }
        return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(StandardCharsets.UTF_8);
    }

    @Override
    public T deserialize(byte[] bytes) {
        if (bytes == null || bytes.length <= 0) {
            return null;
        }
        String str = new String(bytes, StandardCharsets.UTF_8);
        return JSON.parseObject(str, clazz);
    }

}