@RestControllerAdvice
public class GlobalExceptionHandler extends ResponseEntityExceptionHandler {

    @ExceptionHandler(AccessDeniedException.class)
    ProblemDetail handleAccessDeniedException(WebRequest request) {
        ProblemDetail problemDetail = ProblemDetail.forStatus(HttpStatus.FORBIDDEN);
        problemDetail.setTitle("Access Denied");
        problemDetail.setDetail(request.getDescription(false));
        problemDetail.setProperty("timestamp", Instant.now());
        return problemDetail;
    }

    @ExceptionHandler(Exception.class)
    ProblemDetail handleGenericException(Exception ex) {
        ProblemDetail problemDetail = ProblemDetail.forStatus(HttpStatus.INTERNAL_SERVER_ERROR);
        problemDetail.setTitle("Internal Server Error");
        problemDetail.setDetail("An unexpected error occurred: " + ex.getMessage());
        problemDetail.setProperty("timestamp", Instant.now());
        return problemDetail;
    }

    @Override
    protected ResponseEntity<Object> handleMethodArgumentNotValid(
            MethodArgumentNotValidException ex,
            HttpHeaders headers,
            HttpStatusCode status,
            WebRequest request) {

        ProblemDetail problemDetail = ProblemDetail.forStatus(status);
        problemDetail.setTitle("Validation Failed");

        Map<String, String> errors = new HashMap<>();
        ex.getBindingResult().getFieldErrors().forEach(error ->
                errors.put(error.getField(), error.getDefaultMessage())
        );

        problemDetail.setProperty("errors", errors);

        return new ResponseEntity<>(problemDetail, headers, status);
    }

    @ExceptionHandler(AlreadyParticipatingException.class)

@RequiredArgsConstructor
@Service
public class StorageService {
    private final AmazonS3 space;
    private static final String bucketName = "petify";

    public List<String> getImageFileNames() {
        ListObjectsV2Result result = space.listObjectsV2(bucketName);
        List<S3ObjectSummary> objects = result.getObjectSummaries();

        return objects.stream()
                .map(S3ObjectSummary::getKey).toList();
    }

    public String uploadImage(MultipartFile file) {
        try {
            ObjectMetadata objectMetadata = new ObjectMetadata();
            objectMetadata.setContentType(file.getContentType());
            String fileName = generateImageName();
            space.putObject(new PutObjectRequest(bucketName, fileName, file.getInputStream(), objectMetadata)
                    .withCannedAcl(CannedAccessControlList.PublicRead));
            return fileName;
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public boolean deleteImage(String imageName) {
        try {
            if (space.doesObjectExist(bucketName, imageName)) {
                space.deleteObject(bucketName, imageName);
                return true;
            }
            return false;
        } catch (Exception e) {
            throw new RuntimeException("Failed to delete image " + imageName, e);
        }
    }

    private String generateImageName() {
        return UUID.randomUUID().toString();
    }
}

problemDetail.setDetail("An unexpected error occurred: " + ex.getMessage());
        problemDetail.setProperty("timestamp", Instant.now());
        return problemDetail;
    }

    @Override
    protected ResponseEntity<Object> handleMethodArgumentNotValid(
            MethodArgumentNotValidException ex,
            HttpHeaders headers,
            HttpStatusCode status,
            WebRequest request) {

        ProblemDetail problemDetail = ProblemDetail.forStatus(status);
        problemDetail.setTitle("Validation Failed");

        Map<String, String> errors = new HashMap<>();
        ex.getBindingResult().getFieldErrors().forEach(error ->
                errors.put(error.getField(), error.getDefaultMessage())
        );

        problemDetail.setProperty("errors", errors);

        return new ResponseEntity<>(problemDetail, headers, status);
    }

    @ExceptionHandler(AlreadyParticipatingException.class)

problemDetail.setDetail("An unexpected error occurred: " + ex.getMessage());
        problemDetail.setProperty("timestamp", Instant.now());
        return problemDetail;
    }

    @Override
    protected ResponseEntity<Object> handleMethodArgumentNotValid(
            MethodArgumentNotValidException ex,
            HttpHeaders headers,
            HttpStatusCode status,
            WebRequest request) {

        ProblemDetail problemDetail = ProblemDetail.forStatus(status);
        problemDetail.setTitle("Validation Failed");

        Map<String, String> errors = new HashMap<>();
        ex.getBindingResult().getFieldErrors().forEach(error ->
                errors.put(error.getField(), error.getDefaultMessage())
        );

        problemDetail.setProperty("errors", errors);

        return new ResponseEntity<>(problemDetail, headers, status);
    }

    @ExceptionHandler(ImageNotFoundException.class)