/**
 * UPDATEFIELDTECNOCOM TAG
 *
 * Creado para resolver un "problema" del UpdateField de AjaxTags, el cual no permite
 * rellenar un COMBO a partir de un campo de texto.
 * Su uso es el siguiente
 * 
 *
 *
 */
AjaxJspTag.UpdateFieldTecnocom = Class.create();
AjaxJspTag.UpdateFieldTecnocom.prototype = Object.extend(new AjaxJspTag.Base(), {

  initialize: function(url, options) {
    this.url = url;
    this.setOptions(options);
    this.setListeners();
    addAjaxListener(this);
  },
  reload: function () {
    this.setListeners();
  },
  setOptions: function(options) {
    this.options = Object.extend({
      parameters: options.parameters || '',
      doPost: options.doPost || false,
      valueUpdateByName:  options.valueUpdateByName || false,
      eventType: options.eventType ? options.eventType : "click",
      parser: options.parser ? options.parser :  ( options.valueUpdateByName ? new ResponseXmlParser(): new ResponseTextParser()),
      handler: options.handler ? options.handler : this.handler
    }, options || {});
  },

  setListeners: function() {
    eval("$(this.options.action).on"+this.options.eventType+" = this.execute.bindAsEventListener(this)");
  },

  execute: function(e) {
    if (isFunction(this.options.preFunction)) 
    {
        this.options.preFunction();
    }
    if (this.options.cancelExecution) {
        this.cancelExecution = false;
        return ;
      }
    // parse parameters and do replacements
    var params = buildParameterString(this.options.parameters);

    var obj = this; // required because 'this' conflict with Ajax.Request
    var setFunc = this.setField;
    var aj = new Ajax.Request(this.url, {
      asynchronous: true,
      method: obj.options.doPost ? 'post':'get',
      evalScripts: true,
      parameters: params,
      onSuccess: function(request) {
        obj.options.parser.load(request);
        var results = obj.options.parser.itemList;
        obj.options.handler(request, {target: obj.options.target, items: results});
      },
      onFailure: function(request) {
        if (isFunction(obj.options.errorFunction)){
         obj.options.errorFunction(request,obj.options.parser);
        }
      },
      onComplete: function(request) {
        if (isFunction(obj.options.postFunction)) { obj.options.postFunction(); }
      }
    });
  },
  
  handler: function(request, options) {
    // build an array of option values to be set as selected
    
    $(options.target).options.length = 0;
    $(options.target).disabled = false;
    for (var i=0; i<options.items.length; i++) {
      var newOption = new Option(options.items[i][0], options.items[i][1]);
      $(options.target).options[i] = new Option(options.items[i][0], options.items[i][1]);
      // set the option as selected if it is in the default list
      if ( newOption.selected == false && options.items[i].length == 3 && parseBoolean(options.items[i][2]) ){
           newOption.selected = true;
      }
      $(options.target).options[i] = newOption;
    }
    
    
    if (options.items.length == 0)
    {
      $(options.target).options[i] = new Option(this.emptyOptionName, this.emptyOptionValue);
        $(options.target).disabled = true;
    }
    // auch ein SELECT TAG ?
    if ($(options.target).ajaxSelect && $(options.target).ajaxSelect.execute)
    {
        $(options.target).ajaxSelect.execute();
    }
  }

});