package com.doumee.config.interfaceencryption;

import com.doumee.config.annotation.EncryptionReq;
import com.doumee.config.annotation.EncryptionResp;
import com.doumee.config.interfaceencryption.tool.RSAEncrypt;
import com.doumee.core.utils.AESUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.lang.Nullable;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.stream.Collectors;

/**
 * app自定义token认证
 */
@Slf4j
//@Component
public class InterfaceEncryptionMvcConfig implements WebMvcConfigurer {

    /**
     * 是否开发者
     */
    @Value("${debug_model}")
    private Boolean isDebug;
    /**
     * 添加拦截器
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //API接口JwtToken拦截器
        HandlerInterceptor encrypterceptor = new HandlerInterceptor() {
            @Override
            public  void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,
                                         @Nullable Exception ex) throws Exception {
                if (!(handler instanceof HandlerMethod)) {
                    return  ;
                }
               /* HandlerMethod handlerMethod = (HandlerMethod) handler;
                if(!( handlerMethod.hasMethodAnnotation(EncryptionResp.class) || handlerMethod.hasMethodAnnotation(EncryptionResp.class))  ){
                    //如果是加密返回参数
                    String str = generateRandomLetters(16);
                    String afterDealStr = newEncrypt(str);
                    ResponseData response = (ResponseData) object;
                    //对响应内容进行加密
                    ObjectMapper objectMapper = new ObjectMapper();
                    String aesEncryptData = AESUtils.encrypt(objectMapper.writeValueAsString(response.getData()), str);
                    response.setData(aesEncryptData);
                    String aesEncryptMessage = AESUtils.encrypt(objectMapper.writeValueAsString(response.getMessage()), str);
                    response.setMessage(aesEncryptMessage + " " + afterDealStr);
                    return object;
                }*/

            }
            @Override
            public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
                // 如果不是映射到方法直接通过
                if (!(handler instanceof HandlerMethod)) {
                    return true;
                }
                HandlerMethod handlerMethod = (HandlerMethod) handler;
                if(( handlerMethod.hasMethodAnnotation(EncryptionResp.class) || handlerMethod.hasMethodAnnotation(EncryptionResp.class))  ){
                    //如果是加密参数
                    String secretKey = request.getHeader("secretKey");
                    //对key进行解密
//                    String decrypt = RSAEncrypt.decrypt(secretKey, RSAEncrypt.privateKey);
                    //获取请求参数
                    String requestBody = request.getReader().lines().collect(Collectors.joining(System.lineSeparator()));
                    String param = requestBody.toString();
                    //对参数进行解密
                    String decrypt1 = AESUtils.decrypt(param, requestBody);
                    //放入请求
                    request.setAttribute("param", decrypt1);
                }
                return true;
            }
        };
        registry.addInterceptor(encrypterceptor).addPathPatterns("/**");
    }



}