import java.lang.reflect.Method;
import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
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.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.RedisPassword;
import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
import org.springframework.data.redis.connection.lettuce.LettuceClientConfiguration;
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.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import lombok.extern.slf4j.Slf4j;

/**
 * Redis服务器对象缓存配置(对象缓存)
 * 
 * @author Frank.Zeng
 *
 */
@Configuration
@EnableCaching
@Slf4j
public class MyRedisConfig extends CachingConfigurerSupport {

  /**
   * 加载属性文件数据
   * 
   * @return
   */
  @Bean
  public MyRedisProperties redisProperties() {
    return new MyRedisProperties();
  }

  /**
   * RedisTemplate
   *
   * @return
   */
  @SuppressWarnings("rawtypes")
  @Primary
  @Bean(name = "redisTemplate")
  public RedisTemplate<Object, Object> redisTemplate(
      RedisConnectionFactory connectionFactory) {
    RedisTemplate<Object, Object> template = new RedisTemplate<>();
    template.setConnectionFactory(connectionFactory);
    RedisSerializer stringSerializer = new StringRedisSerializer();
    template.setKeySerializer(stringSerializer);
    template.setValueSerializer(sessionRedisSerializer());
    template.setHashKeySerializer(stringSerializer);
    template.setHashValueSerializer(sessionRedisSerializer());
    template.afterPropertiesSet();
    return template;
  }

  /**
   * 设置redisTemplate的存储格式（在此与Session没有什么关系）
   *
   * @return
   */
  @SuppressWarnings("rawtypes")
  @Bean
  public RedisSerializer sessionRedisSerializer() {
    return new Jackson2JsonRedisSerializer<Object>(Object.class);
  }

  /**
   * 主键生成器
   * 
   * @return
   */
  @Bean
  public KeyGenerator commonKeyGenerator() {
    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.getName());
        for (Object obj : params) {
          sb.append(obj.toString());
        }
        String key = sb.toString();
        log.info("key:" + key);
        return key;
      }
    };

  }

  @Bean
  public CacheManager cacheManager(
      @Qualifier("connectionFactory") RedisConnectionFactory redisConnectionFactory) {
    RedisCacheManager redisCacheManager = RedisCacheManager.create(redisConnectionFactory);
    return redisCacheManager;
  }

  @Primary
  @Bean(name = "connectionFactory")
  public RedisConnectionFactory connectionFactory() {
    // 单机版配置
    RedisStandaloneConfiguration redisStandaloneConfiguration =
        new RedisStandaloneConfiguration(redisProperties().getHost(), redisProperties().getPort());
    redisStandaloneConfiguration.setDatabase(redisProperties().getDatabase());
    redisStandaloneConfiguration.setPassword(RedisPassword.of(redisProperties().getPassword()));
    // 集群版配置
    // RedisClusterConfiguration redisClusterConfiguration = new RedisClusterConfiguration();
    // String[] serverArray = clusterNodes.split(",");
    // Set<RedisNode> nodes = new HashSet<RedisNode>();
    // for (String ipPort : serverArray) {
    // String[] ipAndPort = ipPort.split(":");
    // nodes.add(new RedisNode(ipAndPort[0].trim(), Integer.valueOf(ipAndPort[1])));
    // }
    // redisClusterConfiguration.setPassword(RedisPassword.of(password));
    // redisClusterConfiguration.setClusterNodes(nodes);
    // redisClusterConfiguration.setMaxRedirects(maxRedirects);
    // 客户端配置
    GenericObjectPoolConfig poolConfig = new GenericObjectPoolConfig();// 连接池配置
    poolConfig.setMaxIdle(redisProperties().getLettuce().getPool().getMaxIdle());
    poolConfig.setMaxTotal(redisProperties().getLettuce().getPool().getMaxActive());
    poolConfig.setMaxWaitMillis(redisProperties().getLettuce().getPool().getMaxWait().toMillis());
    poolConfig.setMinIdle(redisProperties().getLettuce().getPool().getMinIdle());
    LettuceClientConfiguration lettuceClientConfiguration =
        LettucePoolingClientConfiguration.builder().poolConfig(poolConfig)
            .commandTimeout(redisProperties().getLettuce().getShutdownTimeout()).build();
    LettuceConnectionFactory redisConnectionFactory =
        new LettuceConnectionFactory(redisStandaloneConfiguration, lettuceClientConfiguration);
    log.info("2.1 初始化Redis缓存服务器(普通对象)... ...");
    return redisConnectionFactory;
  }

}