package com.moral.util;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;


import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @ClassName tokenUtils
 * @Description token生成、解析工具类
 * @Author 陈凯裕
 * @Date 2021/3/10 11:35
 * @Version TODO
 **/
@Component
@Slf4j
public class TokenUtils {

    private static RedisTemplate redisTemplate;

    @Autowired
    @Qualifier("tokenRedisTemplate")
    public void setRedisTemplate(RedisTemplate redisTemplate) {
        TokenUtils.redisTemplate = redisTemplate;
    }

    //token有效期 单位：秒
    private static final int validity_time = 60*60*24*7;
    //token非法,生成错误
    public static final int error = -1;
    //token过期
    public static final int timeout = -2;
    //token有效，生成成功
    public static final int valid = 1;

    /**
     * @Description: 生成token
     * @Param: [type, uid] type： 后台取值：manage  前台取值：api
     * @return: java.lang.String
     * @Author: 陈凯裕
     * @Date: 2021/3/10
     */
    public static Map<String, Object> getToken(String uid, Map<String, Object> userInfo) {
        Map<String, Object> result = new HashMap<>();
        //生成加密token
        try {
            //生成token
            String token = TokenEncryptUtils.encoded(uid + "/" + System.currentTimeMillis() / 1000);
            //查询旧的token
            String oldToken = (String) redisTemplate.opsForHash().get("user_token", uid);
            if(oldToken!=null)
                redisTemplate.delete(oldToken);
            //新token写入到value中
            redisTemplate.opsForValue().set(token, userInfo);
            redisTemplate.expire(token, validity_time, TimeUnit.SECONDS);
            //新token写入到Hash中
            redisTemplate.opsForHash().put("user_token",uid,token);

            result.put("code", valid);
            result.put("token",token);
        }catch (Exception e){
            e.printStackTrace();
            log.error(e.getMessage());
            result.put("code",error);
        }
        return result;
    }

    /**
     * @Description: 校验token
     * @Param: [type, token] type： 后台取值：manage  前台取值：api
     * @return: java.util.Map<java.lang.String                               ,                               java.lang.Object>
     * @Author: 陈凯裕
     * @Date: 2021/3/10
     */
    public static Map<String, Object> checkToken( String token) {
        Map<String, Object> result = new HashMap<>();
        try {
            String[] tokenArray = TokenEncryptUtils.decoded(token).split("/");
            //校验token是否合法
            if (tokenArray.length != 2) {
                result.put("code", error);
                result.put("msg", "无效的token");
                return result;
            }
            //校验token是否过期
            int tokenTime = Integer.parseInt(tokenArray[1]);
            if ((System.currentTimeMillis() / 1000) - tokenTime > validity_time) {
                result.put("code", timeout);
                result.put("msg", "登陆身份已过期，请重新登陆");
                return result;
            }
            result.put("code", valid);
            return result;
        } catch (Exception e) {
            log.error("token工具类校验token异常" + e.getMessage());
            result.put("code", error);
            result.put("msg", "无效的token");
            return result;
        }
    }

    //通过token获取用户信息
    public static Map<String, Object> getUserInfoByToken(String token) {
        Map<String, Object> userInfo = (Map<String, Object>) redisTemplate.opsForValue().get(token);
        return userInfo;
    }
}