import * as React from "react";

export interface Selection {
    start: number;
    end: number;
}

export interface InputState {
    value: string;
    selection: Selection | null;
}

export interface BeforeMaskedStateChangeStates {
    previousState: InputState;
    currentState: InputState;
    nextState: InputState;
}

export type Props = Omit<React.InputHTMLAttributes<HTMLInputElement>, "children"> & {
    /**
     * Mask string. Format characters are:
     * * `9`: `0-9`
     * * `a`: `A-Z, a-z`
     * * `\*`: `A-Z, a-z, 0-9`
     *
     * Any character can be escaped with backslash, which usually will appear as double backslash in JS strings.
     * For example, German phone mask with unremoveable prefix +49 will look like `mask="+4\\9 99 999 99"` or `mask={"+4\\\\9 99 999 99"}`
     */
    mask: string | Array<(string | RegExp)>;
    /**
     * Character to cover unfilled editable parts of mask. Default character is "_". If set to null, unfilled parts will be empty, like in ordinary input.
     */
    maskChar?: string | null | undefined;
    maskPlaceholder?: string | null | undefined;
    /**
     * Show mask even in empty input without focus.
     */
    alwaysShowMask?: boolean | undefined;
    /**
     * Use inputRef instead of ref if you need input node to manage focus, selection, etc.
     */
    inputRef?: React.Ref<HTMLInputElement> | undefined;
    /**
     * In case you need to implement more complex masking behavior, you can provide
     * beforeMaskedStateChange function to change masked value and cursor position
     * before it will be applied to the input.
     *
     * * previousState: Input state before change. Only defined on change event.
     * * currentState: Current raw input state. Not defined during component render.
     * * nextState: Input state with applied mask. Contains value and selection fields.
     */
    beforeMaskedStateChange?(states: BeforeMaskedStateChangeStates): InputState;

    children?: (inputProps: any) => React.ReactNode;
};

export class ReactInputMask extends React.Component<Props> {
}

export default ReactInputMask;