//  Underscore.string
//  (c) 2010 Esa-Matti Suuronen <esa-matti aet suuronen dot org>
//  Underscore.string is freely distributable under the terms of the MIT license.
//  Documentation: https://github.com/epeli/underscore.string
//  Some code is borrowed from MooTools and Alexandru Marasteanu.
//  Version '3.1.1'

'use strict';

function s(value) {
  /* jshint validthis: true */
  if (!(this instanceof s)) return new s(value);
  this._wrapped = value;
}

s.VERSION = '3.1.1';

s.isBlank          = require('./isBlank');
s.stripTags        = require('./stripTags');
s.capitalize       = require('./capitalize');
s.decapitalize     = require('./decapitalize');
s.chop             = require('./chop');
s.trim             = require('./trim');
s.clean            = require('./clean');
s.count            = require('./count');
s.chars            = require('./chars');
s.swapCase         = require('./swapCase');
s.escapeHTML       = require('./escapeHTML');
s.unescapeHTML     = require('./unescapeHTML');
s.splice           = require('./splice');
s.insert           = require('./insert');
s.replaceAll       = require('./replaceAll');
s.include          = require('./include');
s.join             = require('./join');
s.lines            = require('./lines');
s.dedent           = require('./dedent');
s.reverse          = require('./reverse');
s.startsWith       = require('./startsWith');
s.endsWith         = require('./endsWith');
s.pred             = require('./pred');
s.succ             = require('./succ');
s.titleize         = require('./titleize');
s.camelize         = require('./camelize');
s.underscored      = require('./underscored');
s.dasherize        = require('./dasherize');
s.classify         = require('./classify');
s.humanize         = require('./humanize');
s.ltrim            = require('./ltrim');
s.rtrim            = require('./rtrim');
s.truncate         = require('./truncate');
s.prune            = require('./prune');
s.words            = require('./words');
s.pad              = require('./pad');
s.lpad             = require('./lpad');
s.rpad             = require('./rpad');
s.lrpad            = require('./lrpad');
s.sprintf          = require('./sprintf');
s.vsprintf         = require('./vsprintf');
s.toNumber         = require('./toNumber');
s.numberFormat     = require('./numberFormat');
s.strRight         = require('./strRight');
s.strRightBack     = require('./strRightBack');
s.strLeft          = require('./strLeft');
s.strLeftBack      = require('./strLeftBack');
s.toSentence       = require('./toSentence');
s.toSentenceSerial = require('./toSentenceSerial');
s.slugify          = require('./slugify');
s.surround         = require('./surround');
s.quote            = require('./quote');
s.unquote          = require('./unquote');
s.repeat           = require('./repeat');
s.naturalCmp       = require('./naturalCmp');
s.levenshtein      = require('./levenshtein');
s.toBoolean        = require('./toBoolean');
s.exports          = require('./exports');
s.escapeRegExp     = require('./helper/escapeRegExp');

// Aliases
s.strip     = s.trim;
s.lstrip    = s.ltrim;
s.rstrip    = s.rtrim;
s.center    = s.lrpad;
s.rjust     = s.lpad;
s.ljust     = s.rpad;
s.contains  = s.include;
s.q         = s.quote;
s.toBool    = s.toBoolean;
s.camelcase = s.camelize;


// Implement chaining
s.prototype = {
  value: function value() {
    return this._wrapped;
  }
};

function fn2method(key, fn) {
    if (typeof fn !== "function") return;
    s.prototype[key] = function() {
      var args = [this._wrapped].concat(Array.prototype.slice.call(arguments));
      var res = fn.apply(null, args);
      // if the result is non-string stop the chain and return the value
      return typeof res === 'string' ? new s(res) : res;
    };
}

// Copy functions to instance methods for chaining
for (var key in s) fn2method(key, s[key]);

fn2method("tap", function tap(string, fn) {
  return fn(string);
});

function prototype2method(methodName) {
  fn2method(methodName, function(context) {
    var args = Array.prototype.slice.call(arguments, 1);
    return String.prototype[methodName].apply(context, args);
  });
}

var prototypeMethods = [
  "toUpperCase",
  "toLowerCase",
  "split",
  "replace",
  "slice",
  "substring",
  "substr",
  "concat"
];

for (var key in prototypeMethods) prototype2method(prototypeMethods[key]);


module.exports = s;
