package com.aida.buyer.common.exception;

import com.aida.buyer.common.result.Response;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.validation.BindException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(UnauthorizedException.class)
    public ResponseEntity<Response<Void>> handleUnauthorizedException(UnauthorizedException e) {
        log.error("Unauthorized: {}", e.getMessage());
        return new ResponseEntity<>(
                Response.fail(401, e.getMessage()),
                HttpStatus.UNAUTHORIZED
        );
    }

    @ExceptionHandler(BusinessException.class)
    public Response<Void> handleBusinessException(BusinessException e) {
        return Response.fail(e.getCode(), e.getMsg());
    }

    @ExceptionHandler(MethodArgumentNotValidException.class)
    public Response<Void> handleValidationException(MethodArgumentNotValidException e) {
        String message = e.getBindingResult().getFieldErrors().stream()
                .map(error -> error.getField() + ": " + error.getDefaultMessage())
                .findFirst()
                .orElse("validation error");
        return Response.fail(-2, message);
    }

    @ExceptionHandler(BindException.class)
    public Response<Void> handleBindException(BindException e) {
        String message = e.getBindingResult().getFieldErrors().stream()
                .map(error -> error.getField() + ": " + error.getDefaultMessage())
                .findFirst()
                .orElse("bind error");
        return Response.fail(-2, message);
    }

    @ExceptionHandler(Exception.class)
    public Response<Void> handleException(Exception e) {
        log.error("system error: ", e);
        return Response.error("系统繁忙");
    }
}