package com.hb.proj.allconfig;

import java.util.Set;

import jakarta.validation.ConstraintViolation;
import jakarta.validation.ConstraintViolationException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import com.hb.proj.utils.RespVO;
import com.hb.proj.utils.RespVOBuilder;

@RestControllerAdvice
public class RequestValidateExceptionHandler {
	
	private static final Logger logger=LoggerFactory.getLogger(RequestValidateExceptionHandler.class);

	//处理请求参数格式错误 @RequestParam上validate失败后抛出的异常是javax.validation.ConstraintViolationException
	@ExceptionHandler(ConstraintViolationException.class)
	public RespVO constraintViolationExceptionHandler(ConstraintViolationException e) {
		//e.printStackTrace();
		Set<ConstraintViolation<?>> constraintViolations=e.getConstraintViolations();
		StringBuilder error=new StringBuilder();
		for(ConstraintViolation<?> itm : constraintViolations) {
			//System.out.println(itm.getInvalidValue()+":"+itm.getPropertyPath()+":"+itm.getMessage());
			error.append(itm.getMessage()+";");
		}
		//jdk8  写法：String message = e.getConstraintViolations().stream().map(ConstraintViolation::getMessage).collect(Collectors.joining());
		return RespVOBuilder.error(error.toString());//
	}
	
	@ExceptionHandler(BindException.class)
	public RespVO validationExceptionHandler(BindException e) {
		//e.printStackTrace();
		BindingResult bindingResult = e.getBindingResult();
		StringBuilder error=new StringBuilder();
		for (FieldError fieldError : bindingResult.getFieldErrors()) {
			error.append(fieldError.getDefaultMessage()+";");
		}
		return RespVOBuilder.error(error.toString());
	}
	
	@ExceptionHandler(HttpRequestMethodNotSupportedException.class)
	public RespVO methodUnsupportExceptionHandler(HttpRequestMethodNotSupportedException e) {
		logger.error("不支持该请求方式",e);
		return RespVOBuilder.error("不支持该请求方式");
		
	}
	
	@ExceptionHandler(Exception.class)
	public RespVO otherExceptionHandler(Exception e) {
		logger.error("服务出错",e);
		return RespVOBuilder.error("服务出错");
		
	}
}