/* 
jQuery "translator" plug-in, written by Ron Tornambe and distributed under the Open Source Initiative OSI - The MIT License 
*/

(function($) {

  var cookies = {
    read: function(name) {
      var nameEQ = name + "=";
      var ca = document.cookie.split(';');
      for (var i = 0; i < ca.length; i++) {
        var c = ca[i];
        while (c.charAt(0) == ' ') c = c.substring(1, c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
      }
      return null;
    },
    create: function(name, value, days) {
      if (days) {
        var date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        var expires = "; expires=" + date.toGMTString();
      }
      else var expires = "";
      try {
        document.cookie = name + "=" + value + expires + "; path=/";
      } catch (e) { }
    },
    erase: function(name) {
      this.create(name, "", -1);
    }
  }

  var settings = {
    'appID': null,
    'listLanguage': "",
    'languageListNode': null,
    'languagesList': null
  };
  var gvars = {
    $this: null,
    cookieName: 'bhcTranslator'
  };
  function isValueElement(elem) {
    return elem.nodeName.toLowerCase() == 'input' && (elem.type.toLowerCase() == 'text' || elem.typetoLowerCase() == 'button');
  }
  function translator(toLang) {
    try {
      function ajaxTranslate(textToTranslate, toElem) {
        var p = {};
        p.appid = settings.appID;
        p.to = toLang;
        p.from = settings.listLanguage;
        p.text = textToTranslate;
        p.contentType = 'text/html';
        $.ajax({
          url: 'http://api.microsofttranslator.com/V2/Ajax.svc/Translate',
          data: p,
          dataType: 'jsonp',
          jsonp: 'oncomplete',
          complete: function(request, status) {
          },
          success: function(result, status) {
            if (isValueElement(toElem)) $(toElem).val(result)
            else $(toElem).html(result);
          },
          error: function(a, b, c) {
          }
        });
      }

      var src_text = null;
      var jelem = null;
      gvars.$this.each(function(index, jelem) {
        if (!jelem) return;
        src_text = $(jelem).attr("src_text");
        if (!src_text) return;
        ajaxTranslate(src_text, jelem);
      });
    } catch (e) { alert(e.messsage); }
  }

  function setupTranslation() {
    function setupLangList(status) {
      var langroot = null;
      
      function getLanguagesList() {
        var langCodes = []
        
        function getLanguageNames(languageCodes) {
          setupLanguageNamesList = function(response) {
            var list = document.createElement('select');
            list.id = "_supportedLanguagesList";
            function sort() {
              var my_options = $("#_supportedLanguagesList option");
              my_options.sort(function(a, b) {
                return a.text.localeCompare(b.text);
              })
              $("#_supportedLanguagesList").empty().append(my_options);
            };
            var optinfo = [];
            for (var i = 0; i < response.length; i++) {
              optinfo.push({ value: langCodes[i], text: response[i] });
            }
            for (var i = 0; i < response.length; i++) {
              var opt = $(document.createElement('option'));
              opt.text(optinfo[i].text);
              opt.val(optinfo[i].value);
              list.appendChild(opt.get(0));
            }
            $(list).bind('change', function() {
              var toLang = $("#_supportedLanguagesList").val();
              cookies.create(gvars.cookieName, toLang, 365)
              translator(toLang);
            });
            list.style.cssText = 'margin:0; padding:0;';
            var listroot = document.createElement('div');
            listroot.id = "_translateElements";
            listroot.appendChild(list);
            if (settings.languageListNode) {
              listroot.style.cssText = 'position:relative;overflow:hidden;z-index:3;';
              settings.languageListNode.style.visibility = 'visible';
            } else {
              settings.languageListNode = document.body;
              listroot.style.cssText = "top:8px;right:12px;position:absolute";
            }
            var appnode = settings.languageListNode;
            appnode.appendChild(listroot);
            sort();
            var lastLang = cookies.read(gvars.cookieName);
            var useLang = lastLang ? lastLang : settings.listLanguage;
            $(list).find("option[value=" + useLang + ']').attr('selected', 'selected');
            if (lastLang) translator(lastLang)
          }
          var parms = { 'appid': settings.appID, locale: settings.listLanguage, languageCodes: languageCodes };
          $.ajax({
            url: 'http://api.microsofttranslator.com/V2/Ajax.svc/GetLanguageNames',
            data: parms,
            dataType: 'jsonp',
            jsonp: 'oncomplete',
            complete: function(request, status) {
            },
            success: function(response, status) {
              setupLanguageNamesList(response);
            }
          });
        }
        formatLanguageCodes = function(response) {
          langCodes = response;
          for (var i = 0; i < response.length; i++) { languageCodes += (languageCodes.length ? "," : "") + '"' + response[i] + '"'; }
          return getLanguageNames('[' + languageCodes + ']');
        }
        var languageCodes = "";

        if (settings.languagesList) formatLanguageCodes(settings.languagesList);
        else {
          var parms = { 'appid': settings.appID };
          $.ajax({
            url: 'http://api.microsofttranslator.com/V2/Ajax.svc/GetLanguagesForTranslate',
            data: parms,
            dataType: 'jsonp',
            jsonp: 'oncomplete',
            complete: function(request, status) {
            },
            success: function(response, status) {
              formatLanguageCodes(response);
            }
          });
        }; 
      }

      function setupOrigLangElems() {
        try {
          gvars.$this.each(function(index, jelem) { // create a new property to hold the original language text
            src_text = isValueElement(jelem) ? $(jelem).val() : $(jelem).html();
            $(jelem).attr("src_text", src_text);
          });
        } catch (e) {
          throw (e);
        }
      }
      function detectPageLanguage() {
        try {
          var langDetected = false;
          gvars.$this.each(function(index, jelem) { // detect source language
            src_text = $(jelem).attr("src_text");
            if (!settings.listLanguage && src_text.length > 20) {
              var parms = { 'appid': settings.appID, text: src_text };
              $.ajax({
                url: 'http://api.microsofttranslator.com/V2/Ajax.svc/Detect',
                data: parms,
                dataType: 'jsonp',
                jsonp: 'oncomplete',
                complete: function(request, status) {
                },
                success: function(result, status) {
                  if (langDetected) return false;
                  settings.listLanguage = result;
                  langDetected = true;
                  return getLanguagesList();
                }
              });
            }
          });
        } catch (e) {
          throw (e)
        }
      }
      setupOrigLangElems();
      detectPageLanguage();
    }
    setupLangList();
    var lastLang = cookies.read(gvars.cookieName);
    if (lastLang) translator(lastLang)
  }
  var methods = {
    init: function(options) {
      gvars.$this = this;
      if (options) $.extend(settings, options);
      setupTranslation();
      return this;
    },
    destroy: function() {
      return this.each(function() {
        $(window).unbind('.translator');
      })
    }
  };

  $.fn.translator = function(method) {
    if (methods[method]) {
      return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
    } else if (typeof method === 'object' || !method) {
      return methods.init.apply(this, arguments);
    } else {
      $.error('Method ' + method + ' does not exist on jQuery.translator');
    }
  };
})(jQuery);