package com.moral.util;

import com.moral.constant.ResponseCodeEnum;
import com.moral.exception.TokenException;

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 org.springframework.util.ObjectUtils;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;


import javax.servlet.http.HttpServletRequest;
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 * 30;

    //判断user_token里有没有用户的token
    public static boolean hHasKey(String uid) {
        return redisTemplate.opsForHash().hasKey("user_token", uid);
    }

    //根据用户id获取token
    public static Object hget(String uid) {
        return redisTemplate.opsForHash().get("user_token", uid);
    }

    /**
     * @Description: 生成token, 并且将用户信息存入缓存
     * @Param: [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 String getToken(String uid, Object userInfo) {
        //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);
            return token;
        } catch (Exception e) {
            log.error("token生成异常：" + e.getMessage());
            throw new TokenException(ResponseCodeEnum.TOKEN_CREATE_ERROR.getCode(),
                    ResponseCodeEnum.TOKEN_CREATE_ERROR.getMsg());
        }
    }
    public static String getTokenApp(String uid, Object userInfo) {
        //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
            getRefreshTokenApp(token,userInfo);
            //redisTemplate.expire(token, validity_time, TimeUnit.SECONDS);
            //新token写入到Hash中
            redisTemplate.opsForHash().put("user_token", uid, token);
            return token;
        } catch (Exception e) {
            log.error("token生成异常：" + e.getMessage());
            throw new TokenException(ResponseCodeEnum.TOKEN_CREATE_ERROR.getCode(),
                    ResponseCodeEnum.TOKEN_CREATE_ERROR.getMsg());
        }
    }

    public static void getRefreshTokenApp(String token, Object userInfo) {
        redisTemplate.opsForValue().set(token, userInfo);
    }

    /**
     * @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 boolean checkToken(String token) {
        try {
            String[] tokenArray = TokenEncryptUtils.decoded(token).split("/");
            //校验token是否合法
            if (tokenArray.length != 2) {
                throw new TokenException(ResponseCodeEnum.TOKEN_INVALID.getCode(),
                        ResponseCodeEnum.TOKEN_INVALID.getMsg());
            }
            //校验token是否过期
            if (!redisTemplate.hasKey(token)) {
                throw new TokenException(ResponseCodeEnum.TOKEN_INVALID.getCode(),
                        ResponseCodeEnum.TOKEN_INVALID.getMsg());
            }
        } catch (Exception e) {
            return false;
        }
        return true;
    }


    /**
     * @Description: 通过token获取用户信息
     * @Param: [token]
     * @return: java.util.Map<java.lang.String                                                                                                                               ,                                                                                                                               java.lang.Object>
     * @Author: 陈凯裕
     * @Date: 2021/3/11
     */
    public static Object getUserInfoByToken(String token) {
        Object userInfo = redisTemplate.opsForValue().get(token);
        if (userInfo == null)
            throw new TokenException(ResponseCodeEnum.TOKEN_INVALID.getCode(),
                    ResponseCodeEnum.TOKEN_INVALID.getMsg());
        return userInfo;
    }

    public static Object getUserInfo() {
        String token = getCurrentToken();
        return getUserInfoByToken(token);
    }

    /**
     * @Description: 销毁token
     * @Param: [uid, token]
     * @return: void
     * @Author: 陈凯裕
     * @Date: 2021/3/11
     */
    public static void destoryToken(String uid, String token) {
        if(ObjectUtils.isEmpty(uid)||ObjectUtils.isEmpty(token))
            return;
        redisTemplate.delete(token);
        redisTemplate.opsForHash().delete("user_token", uid);
    }


    /**
     * @Description: 销毁token
     * @Param: [token]
     * @return: void
     * @Author: 陈凯裕
     * @Date: 2021/4/1
     */
    public static void destoryToken(String token) {
        destoryToken(getUidByToken(token), token);
    }


    /**
     * @Description: 销毁当前连接的token
     * @Param: []
     * @return: void
     * @Author: 陈凯裕
     * @Date: 2021/5/21
     */
    public static void destoryToken() {
        destoryToken(getCurrentToken());
    }

    public static void destoryToken(Integer id) {
        String token = getTokenById(id);
        destoryToken(String.valueOf(id),token);
    }

    /**
     * @Description: 根据id获取token
     * @Param: []
     * @return: java.lang.String
     * @Author: 陈凯裕
     * @Date: 2021/5/21
     */
    public static String getTokenById(Integer id) {
         return (String) getTokenById(id.toString());
    }

    public static String getTokenById(String id) {
        return (String)redisTemplate.opsForHash().get("user_token", String.valueOf(id));
    }


    /**
     * @Description: 根据TOKEN获取Id
     * @Param: [token]
     * @return: void
     * @Author: 陈凯裕
     * @Date: 2021/4/1
     */
    public static String getUidByToken(String token) {
        String[] string = TokenEncryptUtils.decoded(token).split("/");
        return string[0];
    }

    /**
     * @Description: 获取当前请求的token
     * @Param: []
     * @return: java.lang.String
     * @Author: 陈凯裕
     * @Date: 2021/5/21
     */
    public static String getCurrentToken() {
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
        return request.getHeader("token");
    }


    /**
     * @Description: token延长
     * @Param: [token]
     * @return: void
     * @Author: 陈凯裕
     * @Date: 2021/3/11
     */
    public static void extendTokenTime(String token) {
        redisTemplate.expire(token, validity_time, TimeUnit.SECONDS);
    }
}