package com.terra.common.service;

import com.terra.common.entity.all.RedisCacheKey;
import com.terra.common.entity.lf.TokenPo;
import com.terra.common.entity.lf.UserPo;
import com.terra.common.helper.StringHelper;
import com.terra.common.helper.WebHelper;
import com.terra.common.mapper.OperatePoMapper;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.util.concurrent.TimeUnit;

/**
 * 令牌帮助类
 * @author WWW
 */
@Component
public class TokenHelper {
    @Resource
    RedisService redisService;

    @Resource
    OperatePoMapper mapper;

    public static Integer getCurrentUserId(HttpServletRequest req) {
        String token = WebHelper.getToken(req);

        return null;
    }

    public UserPo getUserByToken(String token) {
        if (StringHelper.isNull(token)) {
            return null;
        }

        // redis
        String userKey = RedisCacheKey.signUserKey(token);
        Object obj = redisService.get(userKey);
        if (obj instanceof UserPo) {
            return (UserPo) obj;
        }

        // db
        UserPo po = mapper.selectByToken(token);
        if (null != po) {
            getEntityByToken(token);
        }

        return po;
    }

    public TokenPo getEntityByToken(String token) {
        String tokenKey = RedisCacheKey.signTokenKey(token);

        // redis
        Object obj = redisService.get(tokenKey);
        if (obj instanceof TokenPo) {
            return (TokenPo) obj;
        }

        // db
        TokenPo te = mapper.selectOneByToken(token);
        if (null != te) {
            long min = StringHelper.getMinuteDifference(te.getExpire());
            if (min > 0) {
                redisService.put(tokenKey, te, min, TimeUnit.MINUTES);
            }
        }

        return te;
    }

    public static String getCurrentUserName() {
        return null;
    }
}