import { DropzoneProps, FileRejection } from 'react-dropzone';
import { ThemingProps, UseFormControlProps } from '@chakra-ui/react';
import type { Promisable } from 'type-fest';
interface WithForwardRefType<M extends boolean> extends React.FC<AttachmentProps<M>> {
    <M extends boolean>(props: AttachmentProps<M>): ReturnType<React.FC<AttachmentProps<M>>>;
}
type AttachmentValueProp<Multiple extends boolean> = Multiple extends true ? {
    /**
     * Boolean flag on whether to support multiple file upload.
     */
    multiple: true;
    /**
     * Callback to be invoked when the file is attached or removed.
     */
    onChange: (files: File[]) => void;
    /**
     * Current value of the input.
     */
    value: File[];
} : {
    /**
     * Boolean flag on whether to support multiple file upload.
     */
    multiple?: false;
    /**
     * Callback to be invoked when the file is attached or removed.
     */
    onChange: (file?: File) => void;
    /**
     * Current value of the input.
`       */
    value: File | undefined;
};
export type AttachmentProps<Multiple extends boolean> = UseFormControlProps<HTMLElement> & {
    /**
     * If exists, callback to be invoked when file has errors.
     */
    onError?: (errMsg: string) => void;
    /**
     * Name of the input.
     */
    name: string;
    /**
     * One or more
     * [unique file type specifiers](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/file#unique_file_type_specifiers)
     * describing file types to allow
     */
    accept?: DropzoneProps['accept'];
    /**
     * If exists, files cannot be attached if they are above the maximum size
     * (in bytes).
     */
    maxSize?: DropzoneProps['maxSize'];
    /**
     * Boolean flag on whether to show the file size helper message below the
     * input.
     */
    showFileSize?: boolean;
    /**
     * If provided, the image preview will be shown in the given size variant.
     */
    imagePreview?: 'small' | 'large';
    /**
     * Color scheme of the component.
     */
    colorScheme?: ThemingProps<'Attachment'>['colorScheme'];
    /**
     * If provided, the file will be validated against the given function.
     * If the function returns a string, the file will be considered invalid
     * and the string will be used as the error message.
     * If the function returns null, the file will be considered valid.
     */
    onFileValidation?: (file: File) => Promisable<string | null>;
    /**
     * If provided, files that have been rejected will be displayed along with the reasons for rejection.
     */
    rejections?: FileRejection[];
    /**
     * If exists, callback to be invoked when file has errors.
     */
    onRejection?: (rejections: FileRejection[]) => void;
    /**
     * Maximum number of files allowed when multiple upload is enabled.
     * If not specified, there is no limit. Only applicable when multiple is true.
     */
    maxFiles?: number;
} & AttachmentValueProp<Multiple>;
export declare const Attachment: WithForwardRefType<boolean>;
export {};