package com.trade.admin.system.service.impl;

import com.trade.admin.system.service.ITokenService;
import com.trade.admin.system.domain.model.LoginUser;
import com.trade.common.constant.Constants;
import com.trade.common.redis.RedisCache;
import com.trade.common.token.TokenUtils;
import com.trade.common.utils.ServletUtils;
import com.trade.common.utils.StringUtils;
import com.trade.common.utils.ip.AddressUtils;
import com.trade.common.utils.ip.IpUtils;
import com.trade.common.utils.uuid.IdUtils;
import eu.bitwalker.useragentutils.UserAgent;
import io.jsonwebtoken.Claims;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

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

@Service
public class TokenServiceImpl implements ITokenService {

    // 令牌自定义标识
    @Value("${token.header}")
    private String header;
    // 令牌秘钥
    @Value("${token.secret}")
    private String secret;
    // 令牌有效期（默认30分钟）
    @Value("${token.expireTime}")
    private int expireTime;
    protected static final long MILLIS_SECOND = 1000;
    protected static final long MILLIS_MINUTE = 60 * MILLIS_SECOND;
    private static final Long MILLIS_MINUTE_TEN = 20 * 60 * 1000L;
    @Resource
    private RedisCache redisCache;

    /**
     * 获取用户身份信息
     *
     * @return 用户信息
     */
    @Override
    public LoginUser getLoginUser(HttpServletRequest request) {
        // 获取请求携带的令牌
        String token = TokenUtils.getToken(request, header, false);
        if (StringUtils.isNotEmpty(token)) {
            try {
                Claims claims = TokenUtils.parseToken(token, secret);
                // 解析对应的权限以及用户信息
                String uuid = (String) claims.get(Constants.LOGIN_USER_KEY);
                String userKey = TokenUtils.getTokenKey(uuid);
                LoginUser user = redisCache.getCacheObject(userKey);
                return user;
            } catch (Exception e) {
            }
        }
        return null;
    }

    /**
     * 设置用户身份信息
     */
    @Override
    public void setLoginUser(LoginUser loginUser) {
        if (StringUtils.isNotNull(loginUser) && StringUtils.isNotEmpty(loginUser.getToken())) {
            refreshToken(loginUser);
        }
    }

    /**
     * 删除用户身份信息
     */
    @Override
    public void delLoginUser(String token) {
        if (StringUtils.isNotEmpty(token)) {
            String userKey = TokenUtils.getTokenKey(token);
            redisCache.deleteObject(userKey);
        }
    }

    /**
     * 创建令牌
     *
     * @param loginUser 用户信息
     * @return 令牌
     */
    @Override
    public String createToken(LoginUser loginUser) {
        String token = IdUtils.fastUUID();
        loginUser.setToken(token);
        setUserAgent(loginUser);
        refreshToken(loginUser);
        Map<String, Object> claims = new HashMap<>();
        claims.put(Constants.LOGIN_USER_KEY, token);
        return TokenUtils.createToken(claims, secret);
    }

    /**
     * 验证令牌有效期，相差不足20分钟，自动刷新缓存
     *
     * @param loginUser
     * @return 令牌
     */
    @Override
    public void verifyToken(LoginUser loginUser) {
        long expireTime = loginUser.getExpireTime();
        long currentTime = System.currentTimeMillis();
        if (expireTime - currentTime <= MILLIS_MINUTE_TEN) {
            refreshToken(loginUser);
        }
    }

    /**
     * 刷新令牌有效期
     *
     * @param loginUser 登录信息
     */
    @Override
    public void refreshToken(LoginUser loginUser) {
        loginUser.setLoginTime(System.currentTimeMillis());
        loginUser.setExpireTime(loginUser.getLoginTime() + expireTime * MILLIS_MINUTE);
        // 根据uuid将loginUser缓存
        String userKey = TokenUtils.getTokenKey(loginUser.getToken());
        redisCache.setCacheObject(userKey, loginUser, expireTime, TimeUnit.MINUTES);
    }

    /**
     * 设置用户代理信息
     *
     * @param loginUser 登录信息
     */
    @Override
    public void setUserAgent(LoginUser loginUser) {
        UserAgent userAgent = UserAgent.parseUserAgentString(ServletUtils.getRequest().getHeader("User-Agent"));
        String ip = IpUtils.getIpAddr();
        loginUser.setIpaddr(ip);
        loginUser.setLoginLocation(AddressUtils.getRealAddressByIP(ip));
        loginUser.setBrowser(userAgent.getBrowser().getName());
        loginUser.setOs(userAgent.getOperatingSystem().getName());
    }
}
