/**
 * Convert the given value in bytes into a string.
 */
declare function bytes(value: number, options?: bytes.BytesOptions): string | null;

/**
 * Parse string to an integer in bytes.
 */
declare function bytes(value: string): number | null;

declare namespace bytes {
    type Unit = "b" | "gb" | "kb" | "mb" | "pb" | "tb" | "B" | "GB" | "KB" | "MB" | "PB" | "TB";

    interface BytesOptions {
        decimalPlaces?: number | undefined;
        fixedDecimals?: boolean | undefined;
        thousandsSeparator?: string | undefined;
        unit?: Unit | undefined;
        unitSeparator?: string | undefined;
    }

    /**
     * Format the given value in bytes into a string.
     *
     * If the value is negative, it is kept as such.
     * If it is a float, it is rounded.
     */
    function format(value: number, options?: BytesOptions): string | null;

    /**
     * Parse the string value into an integer in bytes.
     *
     * If no unit is given, it is assumed the value is in bytes.
     */
    function parse(value: string | number): number | null;
}

export = bytes;