package com.greenorange.promotion.exception;

import com.greenorange.promotion.common.BaseResponse;
import com.greenorange.promotion.common.ErrorCode;
import com.greenorange.promotion.common.ResultUtils;
import io.swagger.v3.oas.annotations.Hidden;
import lombok.extern.slf4j.Slf4j;
import net.sf.jsqlparser.util.validation.ValidationError;
import org.springframework.http.ResponseEntity;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.method.annotation.MethodArgumentTypeMismatchException;

import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;

/**
 * 全局异常处理器
 */
@Slf4j
@Hidden
@RestControllerAdvice
public class GlobalExceptionHandler {


    // 处理参数绑定失败的异常
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public BaseResponse<?> handleMethodArgumentNotValidException(MethodArgumentNotValidException e) {
        StringBuilder errors = new StringBuilder();
        // 按字段名排序，确保每次返回的顺序一致
        e.getBindingResult().getFieldErrors().stream()
                .sorted(Comparator.comparing(FieldError::getField))  // 按字段名排序
                .forEach(fieldError -> errors.append("Field: ")
                        .append(fieldError.getField())
                        .append(" | Error: ")
                        .append(fieldError.getDefaultMessage())
                        .append("; "));
        return ResultUtils.error(ErrorCode.PARAMS_ERROR, errors.toString());
    }


//    // 处理参数类型不匹配的异常
//    @ExceptionHandler(MethodArgumentTypeMismatchException.class)
//    public ResponseEntity<String> handleMethodArgumentTypeMismatch(MethodArgumentTypeMismatchException ex) {
//        return ResponseEntity.badRequest().body("Invalid value for parameter: " + ex.getName());
//    }


    // 处理消息体解析失败的异常
    @ExceptionHandler(HttpMessageNotReadableException.class)
    public BaseResponse<?> handleHttpMessageNotReadableException(HttpMessageNotReadableException e) {
        log.error("HttpMessageNotReadableException", e);
        return ResultUtils.error(ErrorCode.PARAMS_ERROR, "请求体不能为空或格式无效");
    }


    // 处理业务异常
    @ExceptionHandler(BusinessException.class)
    public BaseResponse<?> businessExceptionHandler(BusinessException e) {
        log.error("BusinessException", e);
        return ResultUtils.error(e.getCode(), e.getMessage());
    }


    // 处理运行时异常
    @ExceptionHandler(RuntimeException.class)
    public BaseResponse<?> runtimeExceptionHandler(RuntimeException e) {
        log.error("RuntimeException", e);
        return ResultUtils.error(ErrorCode.SYSTEM_ERROR, "系统错误");
    }

}