package cn.hobbystocks.auc.common.config;

import io.lettuce.core.ClientOptions;
import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.autoconfigure.data.redis.RedisProperties;
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.RedisSentinelConfiguration;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.connection.lettuce.LettucePoolingClientConfiguration;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.jsontype.impl.LaissezFaireSubTypeValidator;

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

    @Bean
    @ConditionalOnProperty(name = "hobbystocks.redis.sentinel.nodes")
    public LettuceConnectionFactory redisConnectionFactory(RedisProperties redisProperties, @Value("${hobbystocks.redis.sentinel.nodes:}") String hosts) {
        // 创建 Redis 哨兵配置
        RedisSentinelConfiguration sentinelConfig = new RedisSentinelConfiguration()
                .master(redisProperties.getSentinel().getMaster()); // 设置主节点名称，确保与哨兵配置一致
        for (String host : hosts.split(",")) {
            sentinelConfig.sentinel(host.split(":")[0], Integer.parseInt(host.split(":")[1]));
        }
        // 如果 Redis 服务器设置了密码，则可以在此配置
        sentinelConfig.setPassword(redisProperties.getPassword());

        sentinelConfig.setDatabase(redisProperties.getDatabase());

        // 配置连接池参数
        GenericObjectPoolConfig<Object> poolConfig = new GenericObjectPoolConfig<>();
        poolConfig.setMaxTotal(redisProperties.getLettuce().getPool().getMaxActive()); // 最大连接数
        poolConfig.setMaxIdle(redisProperties.getLettuce().getPool().getMaxIdle()); // 最大空闲连接数
        poolConfig.setMinIdle(redisProperties.getLettuce().getPool().getMinIdle()); // 最小空闲连接数

        // 配置客户端选项，启用自动重连
        ClientOptions clientOptions = ClientOptions.builder()
            .autoReconnect(true)
            .disconnectedBehavior(ClientOptions.DisconnectedBehavior.REJECT_COMMANDS)
            .build();

        // 创建 Lettuce 连接池配置
        LettucePoolingClientConfiguration clientConfig = LettucePoolingClientConfiguration.builder()
                .poolConfig(poolConfig)
                .clientOptions(clientOptions)
                .clientOptions(ClientOptions.builder()
                        .pingBeforeActivateConnection(true) // 在激活连接前发送 ping
                        .build())
                .build();

        // 创建并配置 Lettuce 连接工厂
        return new LettuceConnectionFactory(sentinelConfig, clientConfig);

    }


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

        FastJson2JsonRedisSerializer serializer = new FastJson2JsonRedisSerializer(Object.class);

        ObjectMapper mapper = new ObjectMapper();
        mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        mapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance, ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.PROPERTY);
        serializer.setObjectMapper(mapper);

        // 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();
        return template;
    }

    @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);";
    }
}