package com.example.config;

import com.example.utils.FastJson2JsonRedisSerializer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
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.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import redis.clients.jedis.JedisPoolConfig;

import java.io.*;
import java.util.Map;
import java.util.Properties;

/**
 * redis配置
 *
 * @author ltkj
 */
@Configuration
@EnableCaching
@Slf4j
public class RedisConfig extends CachingConfigurerSupport {

    @Autowired
    private ConfigValue configValue;

    @Bean
    @SuppressWarnings(value = {"unchecked", "rawtypes"})
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
        log.info("Initializing RedisTemplate...");
        RedisTemplate<Object, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(connectionFactory);

        FastJson2JsonRedisSerializer serializer = new FastJson2JsonRedisSerializer(Object.class);

        // 使用StringRedisSerializer来序列化和反序列化redis的key值
        template.setKeySerializer(new StringRedisSerializer());
        template.setValueSerializer(serializer);

        // Hash的key也采用StringRedisSerializer的序列化方式
        template.setHashKeySerializer(new StringRedisSerializer());
        template.setHashValueSerializer(serializer);

        template.afterPropertiesSet();
        log.info("RedisTemplate initialized");
        return template;
    }

    @Bean
    public JedisPoolConfig jedisPoolConfig() {
        JedisPoolConfig config = new JedisPoolConfig();
        // 设置JedisPoolConfig的相关参数，例如最大连接数、最大空闲时间等
//        config.setMinIdle(0);
//        config.setMaxIdle(8);
//        config.setMaxTotal(8);
//        config.setMaxWaitMillis(-1);
//        config.setTestOnBorrow(true);
//        config.setTestOnReturn(true);
        return config;
    }
    @Bean
    public RedisConnectionFactory redisConnectionFactory(JedisPoolConfig jedisPoolConfig) {
        JedisConnectionFactory factory = new JedisConnectionFactory();
        Map<String, String> configMap = configValue.getConfigMap();
        // 从文件中读取配置信息
        // 获取属性值并赋值
        factory.setPoolConfig(jedisPoolConfig);
        // 设置Redis服务器的地址和端口号
        factory.setHostName(configMap.get("redisIp"));
        factory.setPort(Integer.parseInt(configMap.get("redisProt")));
        // 如果需要密码验证，设置密码
        factory.setPassword(configMap.get("redisPassword"));
        // 设置其他参数，如数据库索引等
        factory.setDatabase(Integer.parseInt(configMap.get("redisIpDatabase")));
        // 最后，初始化连接
        factory.afterPropertiesSet();
        log.info("redis连接成功!!!");
        return factory;
    }


    @Bean
    public DefaultRedisScript<Long> limitScript() {
        DefaultRedisScript<Long> redisScript = new DefaultRedisScript<>();
        redisScript.setScriptText(limitScriptText());
        redisScript.setResultType(Long.class);
        return redisScript;
    }

    /**
     * 限流脚本
     */
    private String limitScriptText() {
        return "local key = KEYS[1]\n" +
                "local count = tonumber(ARGV[1])\n" +
                "local time = tonumber(ARGV[2])\n" +
                "local current = redis.call('get', key);\n" +
                "if current and tonumber(current) > count then\n" +
                "    return tonumber(current);\n" +
                "end\n" +
                "current = redis.call('incr', key)\n" +
                "if tonumber(current) == 1 then\n" +
                "    redis.call('expire', key, time)\n" +
                "end\n" +
                "return tonumber(current);";
    }
}