// here we set the current ajax call so we may stop if we change something in the form during a process
// only registers and works with the ajax calls that are called in this file
var AutoCompleteCall = null;

var AutoCompleteTrace = Ajax.Responders.register({
  onCreate: function(obj) {
	if (obj.url.indexOf('SuggestJSON')> -1){
		AutoCompleteCall = obj;
	}
  },
  onComplete: function(obj) {
    AutoCompleteCall = null;
  }
});

/*
 *
 *  Ajax Autocomplete for Prototype, version 1.0.4
 *  (c) 2010 Tomas Kirda
 *
 *  Ajax Autocomplete for Prototype is freely distributable under the terms of an MIT-style license.
 *  For details, see the web site: http://www.devbridge.com/projects/autocomplete/
 *
 */

var Autocomplete = function(el, options){
  this.el = $(el);
  this.id = this.el.identify();
  this.el.setAttribute('autocomplete','off');
  this.values = []; // Giancarlo Gomez - added this to allow for clean return value to update with
  this.url = []; 	// Giancarlo Gomez - added this to allow for friendly url returns
  this.q = []; 		// Giancarlo Gomez - added this to pass back the type of result being received
  this.suggestions = [];
  this.data = [];
  this.badQueries = [];
  this.selectedIndex = -1;
  this.currentValue = this.el.value;
  this.intervalId = 0;
  this.cachedResponse = [];
  this.instanceId = null;
  this.onChangeInterval = null;
  this.ignoreValueChange = false;
  this.serviceUrl = options.serviceUrl;
  this.options = {
    autoSubmit:false,
    minChars:1,
    maxHeight:300,
    deferRequestBy:.4,
    width:0,
    container:null,
	callback:null,
	ignoreCache:false
  };
  if(options){ Object.extend(this.options, options); }
  if(Autocomplete.isDomLoaded){
    this.initialize();
  }else{
    Event.observe(document, 'dom:loaded', this.initialize.bind(this), false);
  }
};

Autocomplete.instances = [];
Autocomplete.isDomLoaded = false;

Autocomplete.getInstance = function(id){
  var instances = Autocomplete.instances;
  var i = instances.length;
  while(i--){ if(instances[i].id === id){ return instances[i]; }}
};

Autocomplete.highlight = function(value, re){
	// Giancarlo Gomez - get all the html elements and save to an array
	var a = value.match(/<[^<]+?>/g);
	// Giancarlo Gomez - split the string by making the html elements the separators
	var b = value.split(/<[^<]+?>/);
	var c = '';
	// Giancarlo Gomez - go thru each array element and do match/replace and add html elements if exists
	b.each(function(d,i){
		c = c + d.replace(re, function(match){ return '<strong>' + match + '</strong>' });
		if(a != undefined && a[i]){
			c = c + a[i];
		}
	});
	return c;
	//return value.replace(re, function(match){ return '<strong>' + match + '</strong>' });
};

Autocomplete.prototype = {

  killerFn: null,

  initialize: function() {
    var me = this;
    this.killerFn = function(e) {
      if (!$(Event.element(e)).up('.autocomplete')) {
        me.killSuggestions();
        me.disableKillerFn();
      }
    } .bindAsEventListener(this);

    if (!this.options.width) { this.options.width = this.el.getWidth(); }

    var div = new Element('div', { style: 'position:absolute;' });
    div.update('<div class="autocomplete-w1"><div class="autocomplete-w2"><div class="autocomplete" id="Autocomplete_' + this.id + '" style="display:none; width:' + this.options.width + 'px;"></div></div></div>');

    this.options.container = $(this.options.container);
    if (this.options.container) {
      this.options.container.appendChild(div);
      this.fixPosition = function() { };
    } else {
      document.body.appendChild(div);
    }

    this.mainContainerId = div.identify();
    this.container = $('Autocomplete_' + this.id);
    this.fixPosition();
    
    Event.observe(this.el, window.opera ? 'keypress':'keydown', this.onKeyPress.bind(this));
    Event.observe(this.el, 'keyup', this.onKeyUp.bind(this));
    Event.observe(this.el, 'blur', this.enableKillerFn.bind(this));
    Event.observe(this.el, 'focus', this.fixPosition.bind(this));
    this.container.setStyle({ maxHeight: this.options.maxHeight + 'px' });
    this.instanceId = Autocomplete.instances.push(this) - 1;
  },

  fixPosition: function() {
    var offset = this.el.cumulativeOffset();
    $(this.mainContainerId).setStyle({ top: (offset.top + this.el.getHeight()) + 'px', left: offset.left + 'px' });
  },

  enableKillerFn: function() {
    Event.observe(document.body, 'click', this.killerFn);
  },

  disableKillerFn: function() {
    Event.stopObserving(document.body, 'click', this.killerFn);
  },

  killSuggestions: function() {
    this.stopKillSuggestions();
    this.intervalId = window.setInterval(function() { this.hide(); this.stopKillSuggestions(); } .bind(this), 300);
  },

  stopKillSuggestions: function() {
    window.clearInterval(this.intervalId);
  },

  startIndicator: function() {
    if(this.options.indicator) Element.show(this.options.indicator);
  },

  stopIndicator: function() {
    if(this.options.indicator) Element.hide(this.options.indicator);
  },

  onKeyPress: function(e) {
    if (!this.enabled) { return; }
    // return will exit the function
    // and event will not fire
    switch (e.keyCode) {
      case Event.KEY_ESC:
        this.el.value = this.currentValue;
        this.hide();
        break;
      case Event.KEY_TAB:
      case Event.KEY_RETURN:
        if (this.selectedIndex === -1) {
          this.hide();
          return;
        }
        this.select(this.selectedIndex);
        if (e.keyCode === Event.KEY_TAB) { return; }
        break;
      case Event.KEY_UP:
        this.moveUp();
        break;
      case Event.KEY_DOWN:
        this.moveDown();
        break;
      default:
        return;
    }
    Event.stop(e);
  },

  onKeyUp: function(e) {
    switch (e.keyCode) {
      case Event.KEY_UP:
      case Event.KEY_DOWN:
        return;
    }
	// Giancarlo Gomez - much cleaner
	if(this.onChangeInterval) clearTimeout(this.onChangeInterval);	
	this.onChangeInterval = setTimeout(this.onValueChange.bind(this), this.options.deferRequestBy*1000);
  },

  onValueChange: function() {
	  	  
    clearInterval(this.onChangeInterval);
	this.currentValue = this.el.value;
    this.selectedIndex = -1;
    
	if (this.ignoreValueChange) {
      this.ignoreValueChange = false;
     // return;
	  this.hide();
    }
    if (this.currentValue === '' || this.currentValue.length < this.options.minChars) {
      this.hide();
    } else {
		// this.hide(); Giancarlo Gomez - Added this so it always hides the suggestion box when they start a new request
      	this.getSuggestions();
    }
  },

  getSuggestions: function() {
    var cr = this.cachedResponse[this.currentValue];
	
	
	if (!this.options.ignoreCache && cr && Object.isArray(cr.suggestions)) {
      this.suggestions = cr.suggestions;
      this.data = cr.data;
      this.suggest();
	// Giancarlo Gomez - this will now ignore the bad query if we are saying to ignore cache
    } else if (!this.isBadQuery(this.currentValue) || this.options.ignoreCache) {
		
		// if we have a previos call kill it before starting this one
		if(AutoCompleteCall != null){
			AutoCompleteCall.transport.abort();
			AutoCompleteCall = null;
		}
		
		this.startIndicator();
		
		// Giancarlo Gomez - added a call back option to be able to make a request for a value prior to making a request
		var pars = { query: this.currentValue };
		if (this.options.callback != null){
			Object.extend(pars, this.options.callback())
		}		
		
		new Ajax.Request(this.serviceUrl, {
			parameters: pars,
			onComplete: this.processResponse.bind(this),
			method: 'post'
		});
    }
  },

  isBadQuery: function(q) {
    // Giancarlo Gomez - if we add numeric calls we need to removed this check - I added it back since we don't suppor zipcode search
	var i = this.badQueries.length;
	while (i--) {
      if (q.indexOf(this.badQueries[i]) === 0) { return true; }
    }
    return false;
  },

  hide: function() {
    this.enabled = false;
    this.selectedIndex = -1;
    this.container.hide();
	this.stopIndicator();
  },

  suggest: function() {
    if (this.suggestions.length === 0) {
      this.hide();
      return;
    }
    var content = [];
		
    var re = new RegExp('\\b' + this.currentValue.match(/\w+/g).join('|\\b'), 'gi');
	
	
	
	this.suggestions.each(function(value, i) {
      content.push((this.selectedIndex === i ? '<div class="selected"' : '<div'), ' title="', value, '" onclick="Autocomplete.instances[', this.instanceId, '].select(', i, ');" onmouseover="Autocomplete.instances[', this.instanceId, '].activate(', i, ');">', Autocomplete.highlight(value, re), '</div>');
    } .bind(this));
    this.enabled = true;
    this.container.update(content.join('')).show();
  },

  processResponse: function(xhr) {
    var response;
	 
	
	this.stopIndicator();
	
    try {
      response = xhr.responseText.evalJSON();
      if (!Object.isArray(response.data)) { response.data = []; }
    } catch (err) { return; }
	
	
	this.cachedResponse[response.query] = response;
    if (response.suggestions.length === 0) { this.badQueries.push(response.query); }
	
	// Giancarlo Gomez - added escapeHTML to allow for passthrough of & 
	// Giancarlo Gomez - changed === to == as numbers would fail
	if (response.query == this.currentValue.escapeHTML()) {
		
		if(response.url){
			this.url = response.url;
		}
		if(response.q){
			this.q = response.q;
		}
		this.values = response.values;
		this.suggestions = response.suggestions;
		this.data = response.data;
		this.suggest(); 
    }
  },

  activate: function(index) {
    var divs = this.container.childNodes;
    var activeItem;
    // Clear previous selection:
    if (this.selectedIndex !== -1 && divs.length > this.selectedIndex) {
      divs[this.selectedIndex].className = '';
    }
    this.selectedIndex = index;
    if (this.selectedIndex !== -1 && divs.length > this.selectedIndex) {
      activeItem = divs[this.selectedIndex]
      activeItem.className = 'selected';
    }
    return activeItem;
  },

  deactivate: function(div, index) {
    div.className = '';
    if (this.selectedIndex === index) { this.selectedIndex = -1; }
  },

  select: function(i) {    
	// var selectedValue = this.suggestions[i];
    // Giancarlo Gomez - changed to new key values
	var selectedValue = this.values[i]
	if (selectedValue) {
      this.el.value = selectedValue;
      if (this.options.autoSubmit && this.el.form) {
        this.el.form.submit();
      }
      this.ignoreValueChange = true;
      this.hide();
      this.onSelect(i);
    }
  },

  moveUp: function() {
    if (this.selectedIndex === -1) { return; }
    if (this.selectedIndex === 0) {
      this.container.childNodes[0].className = '';
      this.selectedIndex = -1;
      this.el.value = this.currentValue;
      return;
    }
    this.adjustScroll(this.selectedIndex - 1);
  },

  moveDown: function() {
    if (this.selectedIndex === (this.suggestions.length - 1)) { return; }
    this.adjustScroll(this.selectedIndex + 1);
  },

  adjustScroll: function(i) {
    var container = this.container;
    var activeItem = this.activate(i);
    var offsetTop = activeItem.offsetTop;
    var upperBound = container.scrollTop;
    var lowerBound = upperBound + this.options.maxHeight - 25;
    if (offsetTop < upperBound) {
      container.scrollTop = offsetTop;
    } else if (offsetTop > lowerBound) {
      container.scrollTop = offsetTop - this.options.maxHeight + 25;
    }
    // this.el.value = this.suggestions[i];
    // Giancarlo Gomez - changed to new key values
	this.el.value = this.values[i];
  },

  onSelect: function(i) {
	// Giancarlo Gomez - changed return to an object to work with
    (this.options.onSelect || Prototype.emptyFunction)({suggestions:this.suggestions[i],data:this.data[i],values:this.values[i],url:this.url[i],q:this.q[i]});
	//advSearchKeywordACResponse(this.suggestions[i]);
  }

};

Event.observe(document, 'dom:loaded', function(){ Autocomplete.isDomLoaded = true; }, false);