/**
 * Copyright (c) 2018 人人开源 All rights reserved.
 * <p>
 * https://www.renren.io
 * <p>
 * 版权所有，侵权必究！
 */

package com.epmet.resolver;

import com.alibaba.fastjson.JSON;
import com.epmet.common.token.dto.TokenDto;
import com.epmet.common.token.util.CpUserDetailRedis;
import com.epmet.commons.tools.annotation.LoginUser;
import com.epmet.commons.tools.constant.Constant;
import com.epmet.commons.tools.exception.RenException;
import com.epmet.exception.ModuleErrorCode;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.MethodParameter;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;

/**
 * 有@LoginUser注解的方法参数，注入当前登录用户
 *
 * @author Mark sunlightcs@gmail.com
 */
@Component
public class LoginUserHandlerMethodArgumentResolver implements HandlerMethodArgumentResolver {
    private Logger logger = LoggerFactory.getLogger(getClass());
    @Autowired
    private CpUserDetailRedis cpUserDetailRedis;

    public LoginUserHandlerMethodArgumentResolver(){

    }

    @Override
    public boolean supportsParameter(MethodParameter parameter) {
        logger.info("enter supportsParameter ");
        return parameter.getParameterType().isAssignableFrom(TokenDto.class) && parameter.hasParameterAnnotation(LoginUser.class);
    }

    @Override
    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer container,
                                  NativeWebRequest request, WebDataBinderFactory factory) throws Exception {
        //app-client-userId
        String redisKey = request.getHeader(Constant.APP_USER_KEY);
        if (StringUtils.isEmpty(redisKey)) {
            throw new RenException(ModuleErrorCode.TOKEN_INVALID);
        }
        String[] keyArray=redisKey.split("-");
        String app=keyArray[0];
        String client=keyArray[1];
        String userId=keyArray[2];
        TokenDto tokenDto = cpUserDetailRedis.get(app,client,userId);
        logger.info("resolveArgument TokenDto:"+ JSON.toJSONString(tokenDto));
        return tokenDto;
    }
}