package com.ltkj.web.controller.api.advice;

import com.ltkj.web.controller.api.anno.Encrypt;
import com.ltkj.web.controller.api.utils.CryptoUtil;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

@RestControllerAdvice
public class EncryptResponseAdvice implements ResponseBodyAdvice<Object> {

    @Override
    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
        return returnType.hasMethodAnnotation(Encrypt.class)
                || returnType.getContainingClass().isAnnotationPresent(Encrypt.class);
    }

    @Override
    public Object beforeBodyWrite(Object body,
                                  MethodParameter returnType,
                                  MediaType selectedContentType,
                                  Class<? extends HttpMessageConverter<?>> selectedConverterType,
                                  ServerHttpRequest request,
                                  ServerHttpResponse response) {

        try {
            String json = body instanceof String ? (String) body : new com.fasterxml.jackson.databind.ObjectMapper().writeValueAsString(body);
            System.out.println("加密前：" + json);
            return CryptoUtil.encrypt(json);
        } catch (Exception e) {
            throw new RuntimeException("响应加密失败", e);
        }
    }
}