import createPadding from './_createPadding.js';
import stringSize from './_stringSize.js';
import toInteger from './toInteger.js';
import toString from './toString.js';

/**
 * Pads `string` on the right side if it's shorter than `length`.  Padding
 * characters are truncated if they exceed `length`. 
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category String
 * @param {string} [string=''] The string to pad. 
 * @param {number} [length=0] The padding length. 
 * @param {string} [chars=' '] The string used as padding. 
 * @returns {string} Returns the padded string. 
 * @example
 *
 * _.padEnd('abc', 6);
 * // => 'abc   '
 *
 * _.padEnd('abc', 6, '_-');
 * // => 'abc_-_'
 *
 * _.padEnd('abc', 3);
 * // => 'abc'
 */
function padEnd(string, length, chars) {
  string = toString(string);
  length = toInteger(length);

  var strLength = length ?  stringSize(string) : 0;
  return (length && strLength < length)
    ? ( string + createPadding(length - strLength, chars))
    : string;
}

export default padEnd;
