(function($){
  $.fn.textHighlighter = function( originalWord, lenient, errNumb, isError, isForcedSuggestion ) {
    var pattern = "";
    if (lenient) {
      pattern = createAccentRegexp(originalWord);
    } else {
      pattern = originalWord.toUpperCase();
    }

    return this.each(function() {
      setHighlight(this, pattern);
    });

    function setHighlight(node, pattern) {
      var val;
      var new_val;
      // elementi rimossi al termine delle operazioni
      var remove = [];
      var skip = 0;

      if ( node ) {
        // Loop sui childNodes (node.nextSibling)
        do {
          // Il processo inizia solo in caso di text nodes. Altrimenti procede ricorsivamente...
          if ( node.nodeType === 3 ) {
            var index = 0;
            // lenient :: il pattern è una regexp.
            if (lenient)
              index = node.data.search(pattern);
            else
              index = node.data.toUpperCase().indexOf(pattern);

            if(index>=0) {
              var preFixId = "word_";
              var className = "hl";
              if (isForcedSuggestion)
                className = "hlFS";
              else if (isError)
                className = "hlErr";
              else
                className = "hlCorr";

              var parentNode = node.parentNode;
              // se l'elemento ha già l'highligth non faccio altro che cambiarglielo
              if (parentNode != null && parentNode.className != null && parentNode.className == className) {
                parentNode.setAttribute("class", className);

              } else {
                var errorSpan = "<span class=\"" + className + "\" title=\"tasto destro per caricare i suggerimenti\" alt=\"tasto destro per caricare i suggerimenti\" ";

                // Aggiungo l'id solo se è presente
                if (errNumb != null && errNumb != "")
                  errorSpan += " id=\"" + preFixId + errNumb + "\"> ";
                else
                  errorSpan += " id=\"" + preFixId + "CA\"> ";

                // valore originale del nodo
                val = node.nodeValue;

                //console.debug('node ', node, 'originalWord ', originalWord, 'val ', val);

                /**
                 * REGEX PER IDENTIFICARE I WORDBOUNDARIES
                 */
                // see: http://breakthebit.org/post/3446894238/word-boundaries-in-javascripts-regular-expressions
                // \s è uno "shorthand" per spazio/fine linea/linefeed/tab. Devo escapparlo due volte perché è dentro stringa js
                // \[ e \] significano "quadra-letterale", la escappo un'altra volta perché sono dentro stringa js
                // ' e " non sono caratteri speciali nelle RegEx: li escappo perché siamo in stringa js
                // nella sintassi delle regEx, il - è letterale solo se è il primo o l'ultimo dentro una quadra!
                
                var wordBoundaryRegEx = "[\\s.,;:\"«»!¡?¿()\\[\\]{}_+-]";     // apostrofo NON considerato come word boundary

                //lo voglio case-sensitive, per questo non c'è "i" nel costruttore della RegEx e manca "g" in quanto interessa solo l'occorenza corrente
                //le parentesi nella RegEx identificano i tre match $1 $2 $3
                var regex = new RegExp("(^|"+wordBoundaryRegEx +"+)("+originalWord+")("+wordBoundaryRegEx+"+|$)");
                //nella stringa di confine sinistro c'è il +, per dire "almeno uno" (l'inizio linea |, almeno lui, c'è sempre)
                //nella stringa di confine destro non c'è il +, perché il fine-linea può non esserci)
                new_val = val.replace(regex, "$1"+ errorSpan.trim() +"$2"+"</span>"+"$3");


                  //var new_val_space = "<span id='sp_"  + preFixId + (errNumb - 1)  + "' class='spPostErr'> </span>";

                // si ha la sostituzione solo se il nuovo valore è differente
                if ( new_val !== val ) {
                  // il nuovo valore contiene HTML
                  if ( /</.test( new_val ) ) {
                    $(node).before(/*new_val_space + */new_val);
                    // IL NODO NON PUO' ESSERE RIMOSSO ALTRIMENTI IL LOOP NE VIENE COMPROMESSO
                    remove.push( node );

                  // il nuovo valore non contiene HTML
                  } else
                    node.nodeValue = new_val;

                  skip = 1;
                }
              }
            }

          } else {
            if (node.nodeType == 1 && node.childNodes && !/(script|style)/i.test(node.tagName)) {
              for (var i = 0; i < node.childNodes.length; ++i)
                i += setHighlight(node.childNodes[i], pattern);
            }
          }

        } while ( node = node.nextSibling );
      }
      // terminato il loop è possibile rimuovere tutti gli elementi
      remove.length && $(remove).remove();
      return skip;
    }

    /*
     * Creates a regexp for case- and accent-insensitive matching of a regular
     * alphabetic string. For each character in the original string the output
     * contains a regexp character class that matches the character itself and all
     * unicode variations. So, if the input is "Foo" the function returns
     * something like [Ff...][OoÖöÒò..][OoÖöÒò..].
     * Inspiration:
     * http://stackoverflow.com/questions/227950/programatic-accent-reduction-in-javascript-aka-text-normalization-or-unaccenting
     */
    function createAccentRegexp(characters) {
      // Replaces all accented characters.
      var deaccentedString = deaccent(characters);
      // Escapes all regexp meta characters.
      var cleanString = deaccentedString.replace(/([|()[{.+*?^$\\])/g,"\\$1");
      var accentReplacer = function(character) {
        return charToAccentedCharClassMap[character] || character;
      };
      // Matches anything *but* a whitespace and replaces it.
      var regexp = cleanString.replace(/\S/g, accentReplacer);
      return new RegExp(regexp, "g");
    }

    /*
     * Returns a string in which each accented and lower-case character from the
     * input is replaced with the respective upper-case base character in the A-Z
     * range (e.g. ä->A, è->E, å->A, ë->E). Hence, the return value for
     * "séléction" is "SELECTION".
     */
    function deaccent(accentedString) {
      var result = accentedString;
      for (var key in charToAccentedCharClassMap) {
        result = result.replace(new RegExp(charToAccentedCharClassMap[key], "g"), key);
      }
      return result;
    }
  };

})(jQuery);

jQuery.fn.removeHighlight = function() {
  var elementToRemoveHighlight = this.find("span").filter(function() { if (this.id.indexOf("word_") > -1) {return this} });
  return elementToRemoveHighlight.each(function() {
    this.parentNode.firstChild.nodeName;
    with (this.parentNode) {
        if(this.firstChild!=null){
            replaceChild(this.firstChild, this);
            normalize();
        }
    }
  }).end();
};

jQuery.fn.removeSingleHighlight = function(spanId) {
  this.find("#" + spanId).each(function() {
    this.parentNode.firstChild.nodeName;
    with (this.parentNode) {
      replaceChild(this.firstChild, this);
      normalize();
    }
  }).end();
};

/*
 * Map generated from ftp.unicode.org/Public/UNIDATA/UnicodeData.txt. Maps each
 * upper-case basic alphabet character in the A-Z range to a regex character
 * class that contains all variations (accented, unaccented, upper-case,
 * lower-case) of this character (e.g. A->[AaÄäå....]).
 */
var charToAccentedCharClassMap = {
  'A': '[Aa\xaa\xc0-\xc5\xe0-\xe5\u0100-\u0105\u01cd\u01ce\u0200-\u0203\u0226\u0227\u1d2c\u1d43\u1e00\u1e01\u1e9a\u1ea0-\u1ea3\u2090\u2100\u2101\u213b\u249c\u24b6\u24d0\u3371-\u3374\u3380-\u3384\u3388\u3389\u33a9-\u33af\u33c2\u33ca\u33df\u33ff\uff21\uff41]',
  'B': '[Bb\u1d2e\u1d47\u1e02-\u1e07\u212c\u249d\u24b7\u24d1\u3374\u3385-\u3387\u33c3\u33c8\u33d4\u33dd\uff22\uff42]',
  'C': '[Cc\xc7\xe7\u0106-\u010d\u1d9c\u2100\u2102\u2103\u2105\u2106\u212d\u216d\u217d\u249e\u24b8\u24d2\u3376\u3388\u3389\u339d\u33a0\u33a4\u33c4-\u33c7\uff23\uff43]',
  'D': '[Dd\u010e\u010f\u01c4-\u01c6\u01f1-\u01f3\u1d30\u1d48\u1e0a-\u1e13\u2145\u2146\u216e\u217e\u249f\u24b9\u24d3\u32cf\u3372\u3377-\u3379\u3397\u33ad-\u33af\u33c5\u33c8\uff24\uff44]',
  'E': '[Ee\xc8-\xcb\xe8-\xeb\u0112-\u011b\u0204-\u0207\u0228\u0229\u1d31\u1d49\u1e18-\u1e1b\u1eb8-\u1ebd\u2091\u2121\u212f\u2130\u2147\u24a0\u24ba\u24d4\u3250\u32cd\u32ce\uff25\uff45]',
  'F': '[Ff\u1da0\u1e1e\u1e1f\u2109\u2131\u213b\u24a1\u24bb\u24d5\u338a-\u338c\u3399\ufb00-\ufb04\uff26\uff46]',
  'G': '[Gg\u011c-\u0123\u01e6\u01e7\u01f4\u01f5\u1d33\u1d4d\u1e20\u1e21\u210a\u24a2\u24bc\u24d6\u32cc\u32cd\u3387\u338d-\u338f\u3393\u33ac\u33c6\u33c9\u33d2\u33ff\uff27\uff47]',
  'H': '[Hh\u0124\u0125\u021e\u021f\u02b0\u1d34\u1e22-\u1e2b\u1e96\u210b-\u210e\u24a3\u24bd\u24d7\u32cc\u3371\u3390-\u3394\u33ca\u33cb\u33d7\uff28\uff48]',
  'I': '[Ii\xcc-\xcf\xec-\xef\u0128-\u0130\u0132\u0133\u01cf\u01d0\u0208-\u020b\u1d35\u1d62\u1e2c\u1e2d\u1ec8-\u1ecb\u2071\u2110\u2111\u2139\u2148\u2160-\u2163\u2165-\u2168\u216a\u216b\u2170-\u2173\u2175-\u2178\u217a\u217b\u24a4\u24be\u24d8\u337a\u33cc\u33d5\ufb01\ufb03\uff29\uff49]',
  'J': '[Jj\u0132-\u0135\u01c7-\u01cc\u01f0\u02b2\u1d36\u2149\u24a5\u24bf\u24d9\u2c7c\uff2a\uff4a]',
  'K': '[Kk\u0136\u0137\u01e8\u01e9\u1d37\u1d4f\u1e30-\u1e35\u212a\u24a6\u24c0\u24da\u3384\u3385\u3389\u338f\u3391\u3398\u339e\u33a2\u33a6\u33aa\u33b8\u33be\u33c0\u33c6\u33cd-\u33cf\uff2b\uff4b]',
  'L': '[Ll\u0139-\u0140\u01c7-\u01c9\u02e1\u1d38\u1e36\u1e37\u1e3a-\u1e3d\u2112\u2113\u2121\u216c\u217c\u24a7\u24c1\u24db\u32cf\u3388\u3389\u33d0-\u33d3\u33d5\u33d6\u33ff\ufb02\ufb04\uff2c\uff4c]',
  'M': '[Mm\u1d39\u1d50\u1e3e-\u1e43\u2120\u2122\u2133\u216f\u217f\u24a8\u24c2\u24dc\u3377-\u3379\u3383\u3386\u338e\u3392\u3396\u3399-\u33a8\u33ab\u33b3\u33b7\u33b9\u33bd\u33bf\u33c1\u33c2\u33ce\u33d0\u33d4-\u33d6\u33d8\u33d9\u33de\u33df\uff2d\uff4d]',
  'N': '[Nn\xd1\xf1\u0143-\u0149\u01ca-\u01cc\u01f8\u01f9\u1d3a\u1e44-\u1e4b\u207f\u2115\u2116\u24a9\u24c3\u24dd\u3381\u338b\u339a\u33b1\u33b5\u33bb\u33cc\u33d1\uff2e\uff4e]',
  'O': '[Oo\xba\xd2-\xd6\xf2-\xf6\u014c-\u0151\u01a0\u01a1\u01d1\u01d2\u01ea\u01eb\u020c-\u020f\u022e\u022f\u1d3c\u1d52\u1ecc-\u1ecf\u2092\u2105\u2116\u2134\u24aa\u24c4\u24de\u3375\u33c7\u33d2\u33d6\uff2f\uff4f]',
  'P': '[Pp\u1d3e\u1d56\u1e54-\u1e57\u2119\u24ab\u24c5\u24df\u3250\u3371\u3376\u3380\u338a\u33a9-\u33ac\u33b0\u33b4\u33ba\u33cb\u33d7-\u33da\uff30\uff50]',
  'Q': '[Qq\u211a\u24ac\u24c6\u24e0\u33c3\uff31\uff51]',
  'R': '[Rr\u0154-\u0159\u0210-\u0213\u02b3\u1d3f\u1d63\u1e58-\u1e5b\u1e5e\u1e5f\u20a8\u211b-\u211d\u24ad\u24c7\u24e1\u32cd\u3374\u33ad-\u33af\u33da\u33db\uff32\uff52]',
  'S': '[Ss\u015a-\u0161\u017f\u0218\u0219\u02e2\u1e60-\u1e63\u20a8\u2101\u2120\u24ae\u24c8\u24e2\u33a7\u33a8\u33ae-\u33b3\u33db\u33dc\ufb06\uff33\uff53]',
  'T': '[Tt\u0162-\u0165\u021a\u021b\u1d40\u1d57\u1e6a-\u1e71\u1e97\u2121\u2122\u24af\u24c9\u24e3\u3250\u32cf\u3394\u33cf\ufb05\ufb06\uff34\uff54]',
  'U': '[Uu\xd9-\xdc\xf9-\xfc\u0168-\u0173\u01af\u01b0\u01d3\u01d4\u0214-\u0217\u1d41\u1d58\u1d64\u1e72-\u1e77\u1ee4-\u1ee7\u2106\u24b0\u24ca\u24e4\u3373\u337a\uff35\uff55]',
  'V': '[Vv\u1d5b\u1d65\u1e7c-\u1e7f\u2163-\u2167\u2173-\u2177\u24b1\u24cb\u24e5\u2c7d\u32ce\u3375\u33b4-\u33b9\u33dc\u33de\uff36\uff56]',
  'W': '[Ww\u0174\u0175\u02b7\u1d42\u1e80-\u1e89\u1e98\u24b2\u24cc\u24e6\u33ba-\u33bf\u33dd\uff37\uff57]',
  'X': '[Xx\u02e3\u1e8a-\u1e8d\u2093\u213b\u2168-\u216b\u2178-\u217b\u24b3\u24cd\u24e7\u33d3\uff38\uff58]',
  'Y': '[Yy\xdd\xfd\xff\u0176-\u0178\u0232\u0233\u02b8\u1e8e\u1e8f\u1e99\u1ef2-\u1ef9\u24b4\u24ce\u24e8\u33c9\uff39\uff59]',
  'Z': '[Zz\u0179-\u017e\u01f1-\u01f3\u1dbb\u1e90-\u1e95\u2124\u2128\u24b5\u24cf\u24e9\u3390-\u3394\uff3a\uff5a]'
};

/*
 * PAROLE CORRETTE
 */
(function($) {
  $.fn.correctWord = function( originalWord, errNumb ) {
    var pattern = originalWord.toUpperCase();
    return this.each(function() {
      setCorrectHighlight(this, pattern);
    });

    function setCorrectHighlight(node, pattern) {
      var val;
      var new_val;
      // elementi rimossi al termine delle operazioni
      var remove = [];
      var skip = 0;

      if ( node ) {
        // Loop sui childNodes (node.nextSibling)
        do {
          // Il processo inizia solo in caso di text nodes. Altrimenti procede ricorsivamente...
          if ( node.nodeType === 3 ) {
            var index = node.data.toUpperCase().indexOf(pattern);
            if(index>=0) {
              var parentNode = node.parentNode;
              // se l'elemento ha già l'highligth non faccio altro che cambiarglielo
              if (parentNode != null && parentNode.className != null && parentNode.className == "hl") {
                parentNode.setAttribute("class", "hl");

              } else {
                var span = "<span class=\"hl\" ";

                // Aggiungo l'id solo se è presente
                if (errNumb != null && errNumb != "")
                  span += " id=\"word_" + errNumb + "\"> ";
                else
                  span += " id=\"word_CA\"> ";

                // valore originale del nodo
                val = node.nodeValue;

                var wordBoundaryRegEx = "[\\s.,;:\"«»!¡?¿()\\[\\]{}_+-]";
                var regex = new RegExp("(^|"+wordBoundaryRegEx+"+)("+originalWord+")("+wordBoundaryRegEx+"+|$)");
                new_val = val.replace(regex, "$1"+span+"$2"+"</span>"+"$3");

                // si ha la sostituzione solo se il nuovo valore è differente
                if ( new_val !== val ) {
                  // il nuovo valore contiene HTML
                  if ( /</.test( new_val ) ) {
                    $(node).before( new_val );
                    // IL NODO NON PUO' ESSERE RIMOSSO ALTRIMENTI IL LOOP NE VIENE COMPROMESSO
                    remove.push( node );

                    // il nuovo valore non contiene HTML
                  } else {
                    node.nodeValue = new_val;
                  }
                  skip = 1;
                }
              }
            }

          } else {
            if (node.nodeType == 1 && node.childNodes && !/(script|style)/i.test(node.tagName)) {
              for (var i = 0; i < node.childNodes.length; ++i)
                i += setCorrectHighlight(node.childNodes[i], pattern);
            }
          }

        } while ( node = node.nextSibling );
      }
      // terminato il loop è possibile rimuovere tutti gli elementi
      remove.length && $(remove).remove();

      return skip;
    }
  };

})(jQuery);