var MAG = Object.extend({
	_all_selects: [],

	pushSelect: function(select)
	{
		this._all_selects.push(select);
	},

	repaintAllSelects: function() {
		for(i = 0; i < this._all_selects.length; i++) {
			this._all_selects[i].setArrowPosition();
		}
	} 
}, MAG || {});

Autocompleter.SelectBox = Class.create();
Autocompleter.SelectBox.prototype = Object.extend(new Autocompleter.Base(), {
	_on_over: false,
	_custom_arrow: null,

	initialize: function(select, options) {
	
	if(select.onchange) this._onchange = select.onchange;
  	if($(select)._prototypeEventID)
	{
		var events_for_element = Event.cache[$(select)._prototypeEventID];
		Object.keys(events_for_element).each(function(evt_name){
			this["sel_"+evt_name] = events_for_element[evt_name];
		}.bind(this));
	}

	MAG["select_"+$(select).id] = this;
	MAG.pushSelect(this);
	
	
	var inputClasses = Element.classNames(select);
	this.element = new Element('input', {
		id: $(select).id + '_combo',
		type: 'text'
	});
	this.element.addClassName(inputClasses);

	new Insertion.Before(select, this.element);

	this.update = "<div id=\"" + $(select).id + "_options\" class=\"auto_complete\"></div>"
	new Insertion.Before(select, this.update);

    this.baseInitialize($(select).id + "_combo", $(select).id + "_options", options);
    this.tokenBounds = [-1, 0];
    this.select = select;

	$(this.element.id).setAttribute('readonly','readonly');
	this.element.readOnly = true;

	Element.hide(select);
	Element.addClassName(this.element.id, this.options.css);

	this.setSelectOptions();

	this._custom_arrow = new Element('ins');
	this._custom_arrow.addClassName('combo_arrow');
	new Insertion.After(select, this._custom_arrow);
	this.setArrowPosition();

	Event.observe(this.element, "click", this.activate.bindAsEventListener(this));
	Event.observe(this._custom_arrow, "click", this.activate.bindAsEventListener(this));

	if ($(select).selectedIndex >= 0) this.element.value = $(select).options[$(select).selectedIndex].innerHTML;

	var self = this;
	this.options.afterUpdateElement = function(text, li) {
		if(li.hasClassName('optgroup')) return;
		var optionList = $(select).getElementsByTagName('option');
		var nodes = $A(optionList);

		var opt = nodes.find( function(node){
			return (node.value == li.id);
		});
		$(select).selectedIndex=opt.index;

		if(self.sel_change) {
			self.sel_change.each(function(f){
				f.handler.call($(select));
			});
		}

		if(Object.isFunction(self._onchange)) {
			self._onchange.bind(self.select).call();
		}
	}

	Event.observe(this._custom_arrow, 'mouseover', function(){this._on_over=true;}.bind(this));
	Event.observe(this._custom_arrow, 'mousemove', function(){this._on_over=true;}.bind(this));
	Event.observe(this._custom_arrow, 'mouseout', function(){this._on_over=false;this.element.focus();}.bind(this));
	Event.observe(this.update, 'mouseover', function(){this._on_over=true;}.bind(this));
	Event.observe(this.update, 'mousemove', function(){this._on_over=true;}.bind(this));
    Event.observe(this.update, 'mouseout', function(){this._on_over=false;this.element.focus();}.bind(this));
  },

  setSelectOptions: function()
  {
		this.selectOptions = [];
		var optionList = $(this.select).getElementsByTagName('option');
		var nodes = $A(optionList);
		var tmp_parent = null;
		for(i=0; i<nodes.length;i++){
			var parent_element = nodes[i].parentNode;
			if(parent_element != tmp_parent) {
				tmp_parent = parent_element;
				if(parent_element.tagName === 'OPTGROUP') {
					this.selectOptions.push("<li class=\"optgroup\">" + parent_element.getAttribute('label') + '</li>');
					var html_class = 'optgroup_option';
				} else {
					var html_class = 'option';
				}
			}
			this.selectOptions.push("<li class=\""+html_class+"\" id=\"" + nodes[i].value + "\">" + nodes[i].innerHTML + '</li>');
			if (nodes[i].getAttribute("selected")) this.element.value = nodes[i].innerHTML;
		}
  },

  getUpdatedChoices: function() {
  		this.updateChoices(this.setValues());
  },

  setValues : function(){
		return ("<ul>" + this.selectOptions.join('') + "</ul>");
  },

  setOptions: function(options) {
    this.options = Object.extend({
		css			: 'combo'	 //css class for new element
	}, options || {});
  },

  reSet: function()
  {
  	this.setSelectOptions();
  	$(this.update).update(this.setValues());
  	if($(this.select).selectedIndex >= 0) this.element.value = $(this.select).options[$(this.select).selectedIndex].innerHTML;
  	else this.element.value = '';
  	MAG.repaintAllSelects();
  },

  onClick: function(event) {
  	var element = Event.findElement(event, 'LI');
  	if(element.hasClassName('optgroup')) return;
    this.index = element.autocompleteIndex;
    this.selectEntry();
    this.hide();
  },

  onBlur: function(event) {
  	if(this._on_over===true) return;

  	// needed to make click events working
    setTimeout(this.hide.bind(this), 250);
    this.hasFocus = false;
    this.active = false;
  },

  setArrowPosition: function()
  {
  	Position.clone(this.element, this._custom_arrow, {
		setWidth: false,
		setHeight: false,
		offsetTop: 1,
		offsetLeft: this.element.offsetWidth - 17
	});
  }
});