import escapeRegExp     from 'lodash/escapeRegExp';
import { empty, space } from '../constants';
import getIndent        from '../getIndent';

export type Options = {
    /** the indentation character */
    indenter?: string;
};

/**
 * Remove indentation from text
 *
 * @param input The indented text
 * @param pattern  (space)
 */
export function unindent(input: string, { indenter = space }: Options = {}): string {
    const indent = getIndent(input, { indenter });

    if(indent === 0)
        return input;

    return input.replace(new RegExp(`^(${escapeRegExp(indenter)}){${indent}}`, 'gmu'), empty);
}

export default unindent;