import * as React from "react";

declare class FileInput extends React.Component<FileInput.Props> {
}

declare namespace FileInput {
    type Format = "buffer" | "binary" | "url" | "text";
    type Result = [ProgressEvent, File];

    interface Props extends Omit<React.InputHTMLAttributes<HTMLInputElement>, "onChange"> {
        /**
         * what format the `FileReader` should read the file as
         * (i.e., `'buffer'`, `'binary'`, `'url'`, `'text'`).
         *
         * Defaults to `'url'`.
         */
        as?: Format | undefined;

        /**
         * Callback function called when the files are chosen by the user.
         *
         * Results will be an array of arrays, the size of which depending
         * on how many files were selected.
         *
         * Each result will be an array of two items:
         *
         * `progressEvent`: `result[0]` is a `ProgressEvent` object.
         * You can retrieve the raw results at `progressEvent.target.result`
         * among other things.
         *
         * `file`: `result[1]` is a `File` object. You can retrieve the file name
         * at file.name among other things.
         *
         * @param event The event that triggered file changes
         * @param results The array of files
         */
        onChange(event: React.ChangeEvent<HTMLInputElement>, results: Result[]): void;
    }
}

export = FileInput;