package co.yiiu.pybbs.plugin;

import co.yiiu.pybbs.config.service.BaseService;
import co.yiiu.pybbs.model.SystemConfig;
import co.yiiu.pybbs.service.ISystemConfigService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.DependsOn;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
import redis.clients.jedis.params.SetParams;

/**
 * Created by tomoya.
 * Copyright (c) 2018, All Rights Reserved.
 * https://yiiu.co
 */
@Component
@DependsOn("mybatisPlusConfig")
public class RedisService implements BaseService<JedisPool> {

  @Autowired
  private ISystemConfigService systemConfigService;
  private JedisPool jedisPool;
  private Logger log = LoggerFactory.getLogger(RedisService.class);

  public void setJedis(JedisPool jedisPool) {
    this.jedisPool = jedisPool;
  }

  public JedisPool instance() {
    try {
      if (this.jedisPool != null) return this.jedisPool;
      // 获取redis的连接
      // host
      SystemConfig systemConfigHost = systemConfigService.selectByKey("redis_host");
      String host = systemConfigHost.getValue();
      // port
      SystemConfig systemConfigPort = systemConfigService.selectByKey("redis_port");
      String port = systemConfigPort.getValue();
      // password
      SystemConfig systemConfigPassword = systemConfigService.selectByKey("redis_password");
      String password = systemConfigPassword.getValue();
      password = StringUtils.isEmpty(password) ? null : password;
      // database
      SystemConfig systemConfigDatabase = systemConfigService.selectByKey("redis_database");
      String database = systemConfigDatabase.getValue();
      // timeout
      SystemConfig systemConfigTimeout = systemConfigService.selectByKey("redis_timeout");
      String timeout = systemConfigTimeout.getValue();

      if (!this.isRedisConfig()) {
        log.info("redis配置信息不全或没有配置...");
        return null;
      }
      JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
      // 配置jedis连接池最多空闲多少个实例，源码默认 8
      jedisPoolConfig.setMaxIdle(7);
      // 配置jedis连接池最多创建多少个实例，源码默认 8
      jedisPoolConfig.setMaxTotal(20);
      //在borrow(引入)一个jedis实例时，是否提前进行validate操作；如果为true，则得到的jedis实例均是可用的；
      jedisPoolConfig.setTestOnBorrow(true);
      //return 一个jedis实例给pool时，是否检查连接可用性（ping()）
      jedisPoolConfig.setTestOnReturn(true);
      jedisPool = new JedisPool(jedisPoolConfig, host, Integer.parseInt(port), Integer.parseInt(timeout), password,
          Integer.parseInt(database));
      log.info("redis连接对象获取成功...");
      return this.jedisPool;
    } catch (Exception e) {
      log.error("配置redis连接池报错，错误信息: {}", e.getMessage());
      return null;
    }
  }

  // 判断redis是否配置了
  public boolean isRedisConfig() {
    SystemConfig systemConfigHost = systemConfigService.selectByKey("redis_host");
    String host = systemConfigHost.getValue();
    // port
    SystemConfig systemConfigPort = systemConfigService.selectByKey("redis_port");
    String port = systemConfigPort.getValue();
    // database
    SystemConfig systemConfigDatabase = systemConfigService.selectByKey("redis_database");
    String database = systemConfigDatabase.getValue();
    // timeout
    SystemConfig systemConfigTimeout = systemConfigService.selectByKey("redis_timeout");
    String timeout = systemConfigTimeout.getValue();

    return !StringUtils.isEmpty(host) && !StringUtils.isEmpty(port) && !StringUtils.isEmpty(database) && !StringUtils
        .isEmpty(timeout);
  }

  // 获取String值
  public String getString(String key) {
    JedisPool instance = this.instance();
    if (StringUtils.isEmpty(key) || instance == null) return null;
    Jedis jedis = instance.getResource();
    String value = jedis.get(key);
    jedis.close();
    return value;
  }

  public void setString(String key, String value) {
    this.setString(key, value, 300); // 如果不指定过时时间，默认为5分钟
  }

  /**
   * 带有过期时间的保存数据到redis，到期自动删除
   *
   * @param key
   * @param value
   * @param expireTime 单位 秒
   */
  public void setString(String key, String value, int expireTime) {
    JedisPool instance = this.instance();
    if (StringUtils.isEmpty(key) || StringUtils.isEmpty(value) || instance == null) return;
    Jedis jedis = instance.getResource();
    SetParams params = new SetParams();
    params.px(expireTime * 1000);
    jedis.set(key, value, params);
    jedis.close();
  }

  public void delString(String key) {
    JedisPool instance = this.instance();
    if (StringUtils.isEmpty(key) || instance == null) return;
    Jedis jedis = instance.getResource();
    jedis.del(key); // 返回值成功是 1
    jedis.close();
  }

  // TODO 后面有需要会补充获取 list, map 等方法

}