package com.technology.huahai.common.handler;

import com.technology.huahai.common.core.controller.domain.AjaxResult;
import com.technology.huahai.common.exception.CsmException;
import com.technology.huahai.common.exception.CsmTokenException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.client.ResourceAccessException;
import org.springframework.web.context.request.WebRequest;

import java.util.HashMap;
import java.util.Map;

@ControllerAdvice
public class GlobalExceptionHandler {

    private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    @ExceptionHandler(CsmException.class)
    public ResponseEntity<?> resourceNotFoundException(CsmException ex, WebRequest request) {
        logger.error("Unexpected exception occurred: ", ex);
        return new ResponseEntity<>(AjaxResult.error(ex.getMessage()), HttpStatus.OK);
    }

    @ExceptionHandler(CsmTokenException.class)
    public ResponseEntity<?> tokenException(CsmTokenException ex, WebRequest request) {
        logger.error("token exception occurred: ", ex);
        return new ResponseEntity<>(AjaxResult.error(ex.getMessage()), HttpStatus.UNAUTHORIZED);
    }

    @ExceptionHandler(MissingServletRequestParameterException.class)
    public ResponseEntity<?> MissingRequestParameterException(MissingServletRequestParameterException ex, WebRequest request) {
        logger.error("token exception occurred: ", ex);
        String message = ex.getParameterName() + "参数缺失";
        return new ResponseEntity<>(AjaxResult.error(message), HttpStatus.OK);
    }

    @ExceptionHandler(ResourceAccessException.class)
    public ResponseEntity<?> rpcException(ResourceAccessException ex, WebRequest request) {
        logger.error("远程调用异常: ", ex);
        return new ResponseEntity<>(AjaxResult.error("远程调用异常"), HttpStatus.INTERNAL_SERVER_ERROR);
    }

    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<?> paramCheckException(MethodArgumentNotValidException ex, WebRequest request) {
        Map<String, String> errors = new HashMap<>();
        ex.getBindingResult().getAllErrors().forEach((error) -> {
            String fieldName = ((FieldError) error).getField();
            String errorMessage = error.getDefaultMessage();
            errors.put(fieldName, errorMessage);
        });
        String res = String.join(",", errors.values());
        return new ResponseEntity<>(AjaxResult.error(res), HttpStatus.OK);
    }

    // 处理所有其他异常
    @ExceptionHandler(Exception.class)
    public ResponseEntity<?> globalExceptionHandler(Exception ex, WebRequest request) {
        logger.error("Unexpected exception occurred: ", ex);
        return new ResponseEntity<>(AjaxResult.error(ex.getClass().toString()), HttpStatus.INTERNAL_SERVER_ERROR);
    }

}