/*

*  Ajax Autocomplete for jQuery, version 1.1

*  (c) 2009 Tomas Kirda

*

*  Ajax Autocomplete for jQuery is freely distributable under the terms of an MIT-style license.

*  For details, see the web site: http://www.devbridge.com/projects/autocomplete/jquery/

*

*  Last Review: 09/27/2009

*/



/*jslint onevar: true, evil: true, nomen: true, eqeqeq: true, bitwise: true, regexp: true, newcap: true, immed: true */

/*global window: true, document: true, clearInterval: true, setInterval: true, jQuery: true */



(function($) {



  var reEscape = new RegExp('(\\' + ['/', '.', '*', '+', '?', '|', '(', ')', '[', ']', '{', '}', '\\'].join('|\\') + ')', 'g');



  function fnFormatResult(value, data, currentValue) {

    var pattern = '(' + currentValue.replace(reEscape, '\\$1') + ')';

    return value.replace(new RegExp(pattern, 'gi'), '<strong>$1<\/strong>');

  }



  function Autocomplete(el, options) {

    this.el = $(el);

    this.el.attr('autocomplete', 'off');

    this.suggestions = [];

    this.data = [];

    this.badQueries = [];

    this.selectedIndex = -1;

    this.currentValue = this.el.val();

    this.intervalId = 0;

    this.cachedResponse = [];

    this.onChangeInterval = null;

    this.ignoreValueChange = false;

    this.serviceUrl = options.serviceUrl;

    this.isLocal = false;

    this.options = {

      autoSubmit: false,

      minChars: 1,

      maxHeight: 400,

      deferRequestBy: 0,

      width: 0,

      highlight: true,

      params: {},

      fnFormatResult: fnFormatResult,

      delimiter: null,

      zIndex: 9999

    };

    this.initialize();

    this.setOptions(options);

  }

  

  $.fn.autocomplete = function(options) {

    return new Autocomplete(this.get(0), options);

  };





  Autocomplete.prototype = {



    killerFn: null,



    initialize: function() {



      var me, uid, autocompleteElId;

      me = this;

      uid = new Date().getTime();

      autocompleteElId = 'Autocomplete_' + uid;



      this.killerFn = function(e) {

        if ($(e.target).parents('.autocomplete').size() === 0) {

          me.killSuggestions();

          me.disableKillerFn();

        }

      };



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

      this.mainContainerId = 'AutocompleteContainter_' + uid;



      $('<div id="' + this.mainContainerId + '" style="position:absolute;z-index:9999;"><div class="autocomplete-w1"><div class="autocomplete" id="' + autocompleteElId + '" style="display:none; width:300px;"></div></div></div>').appendTo('div.search');



      this.container = $('#' + autocompleteElId);

      this.fixPosition();

      if (window.opera) {

        this.el.keypress(function(e) { me.onKeyPress(e); });

      } else {

        this.el.keydown(function(e) { me.onKeyPress(e); });

      }

      this.el.keyup(function(e) { me.onKeyUp(e); });

      this.el.blur(function() { me.enableKillerFn(); });

      this.el.focus(function() { me.fixPosition(); });

    },

    

    setOptions: function(options){

      var o = this.options;

      $.extend(o, options);

      if(o.lookup){

        this.isLocal = true;

        if($.isArray(o.lookup)){ o.lookup = { suggestions:o.lookup, data:[] }; }

      }

      $('#'+this.mainContainerId).css({ zIndex:o.zIndex });

      this.container.css({ maxHeight: o.maxHeight + 'px', width:o.width });

    },

    

    clearCache: function(){

      this.cachedResponse = [];

      this.badQueries = [];

    },

    

    disable: function(){

      this.disabled = true;

    },

    

    enable: function(){

      this.disabled = false;

    },



    fixPosition: function() {

      var offset = this.el.offset();

      $('#' + this.mainContainerId).css({ top: (offset.top + this.el.innerHeight()) + 'px', left: offset.left + 'px' });

    },



    enableKillerFn: function() {

      var me = this;

      $(document).bind('click', me.killerFn);

    },



    disableKillerFn: function() {

      var me = this;

      $(document).unbind('click', me.killerFn);

    },



    killSuggestions: function() {

      var me = this;

      this.stopKillSuggestions();

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

    },



    stopKillSuggestions: function() {

      window.clearInterval(this.intervalId);

    },



    onKeyPress: function(e) {

      if (this.disabled || !this.enabled) { return; }

      // return will exit the function

      // and event will not be prevented

      switch (e.keyCode) {

        case 27: //KEY_ESC:

          this.el.val(this.currentValue);

          this.hide();

          break;

        case 9: //KEY_TAB:

        case 13: //KEY_RETURN:

          if (this.selectedIndex === -1) {

            this.hide();

            return;

          }

          this.select(this.selectedIndex);

          if (e.keyCode === 9/* KEY_TAB */) { return; }

          break;

        case 38: //KEY_UP:

          this.moveUp();

          break;

        case 40: //KEY_DOWN:

          this.moveDown();

          break;

        default:

          return;

      }

      e.stopImmediatePropagation();

      e.preventDefault();

    },



    onKeyUp: function(e) {

      if(this.disabled){ return; }

      switch (e.keyCode) {

        case 38: //KEY_UP:

        case 40: //KEY_DOWN:

          return;

      }

      clearInterval(this.onChangeInterval);

      if (this.currentValue !== this.el.val()) {

        if (this.options.deferRequestBy > 0) {

          // Defer lookup in case when value changes very quickly:

          var me = this;

          this.onChangeInterval = setInterval(function() { me.onValueChange(); }, this.options.deferRequestBy);

        } else {

          this.onValueChange();

        }

      }

    },



    onValueChange: function() {
    	if(document.getElementById('searchForm').getAttribute('action').indexOf('street') > 0) {
    	
	      clearInterval(this.onChangeInterval);
	
	      this.currentValue = this.el.val();
	
	      var q = this.getQuery(this.currentValue);
	
	      this.selectedIndex = -1;
	
	      if (this.ignoreValueChange) {
	
	        this.ignoreValueChange = false;
	
	        return;
	
	      }
	
	      if (q === '' || q.length < this.options.minChars) {
	
	        this.hide();
	
	      } else {
	
	        this.getSuggestions(q);
	
	      }
    	}

    },



    getQuery: function(val) {

      var d, arr;

      d = this.options.delimiter;

      if (!d) { return $.trim(val); }

      arr = val.split(d);

      return $.trim(arr[arr.length - 1]);

    },



    getSuggestionsLocal: function(q) {

      var ret, arr, len, val, i;

      arr = this.options.lookup;

      len = arr.suggestions.length;

      ret = { suggestions:[], data:[] };

      q = q.toLowerCase();

      for(i=0; i< len; i++){

        val = arr.suggestions[i];

        if(val.toLowerCase().indexOf(q) === 0){

          ret.suggestions.push(val);

          ret.data.push(arr.data[i]);

        }

      }

      return ret;

    },

    

    getSuggestions: function(q) {

      var cr, me;

      cr = this.isLocal ? this.getSuggestionsLocal(q) : this.cachedResponse[q];

      if (cr && $.isArray(cr.suggestions)) {

        this.suggestions = cr.suggestions;

        this.data = cr.data;

        this.suggest();

      } else if (!this.isBadQuery(q)) {

        me = this;

        me.options.params.query = q;

        $.get(this.serviceUrl, me.options.params, function(txt) { me.processResponse(txt); }, 'text');

      }

    },



    isBadQuery: function(q) {

      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();

    },



    suggest: function() {

      if (this.suggestions.length === 0) {

        this.hide();

        return;

      }



      var me, len, div, f, v, i, s, mOver, mClick;

      me = this;

      len = this.suggestions.length;

      f = this.options.fnFormatResult;

      v = this.getQuery(this.currentValue);

      mOver = function(xi) { return function() { me.activate(xi); }; };

      mClick = function(xi) { return function() { me.select(xi); }; };

      this.container.hide().empty();

      for (i = 0; i < len; i++) {

        s = this.suggestions[i];

        div = $((me.selectedIndex === i ? '<div class="selected"' : '<div') + ' onclick="document.getElementById(\'q\').focus();" title="' + s + '">' + f(s, this.data[i], v) + '</div>');

        div.mouseover(mOver(i));

        div.click(mClick(i));

        this.container.append(div);

      }

      this.enabled = true;

      this.container.show();

    },



    processResponse: function(text) {

      var response;

      try {

        response = eval('(' + text + ')');

      } catch (err) { return; }

      if (!$.isArray(response.data)) { response.data = []; }

      this.cachedResponse[response.query] = response;

      if (response.suggestions.length === 0) { this.badQueries.push(response.query); }

      if (response.query === this.getQuery(this.currentValue)) {

        this.suggestions = response.suggestions;

        this.data = response.data;

        this.suggest(); 

      }

    },



    activate: function(index) {

      var divs, activeItem;

      divs = this.container.children();

      // Clear previous selection:

      if (this.selectedIndex !== -1 && divs.length > this.selectedIndex) {

        $(divs.get(this.selectedIndex)).attr('class', '');

      }

      this.selectedIndex = index;

      if (this.selectedIndex !== -1 && divs.length > this.selectedIndex) {

        activeItem = divs.get(this.selectedIndex);

        $(activeItem).attr('class', 'selected');

      }

      return activeItem;

    },



    deactivate: function(div, index) {

      div.className = '';

      if (this.selectedIndex === index) { this.selectedIndex = -1; }

    },



    select: function(i) {

      var selectedValue, f;

      selectedValue = this.suggestions[i];

      if (selectedValue) {

        this.el.val(selectedValue);

        if (this.options.autoSubmit) {

          f = this.el.parents('form');

          if (f.length > 0) { f.get(0).submit(); }

        }

        this.ignoreValueChange = true;

        this.hide();

        this.onSelect(i);

      }

    },



    moveUp: function() {

      if (this.selectedIndex === -1) { return; }

      if (this.selectedIndex === 0) {

        this.container.children().get(0).className = '';

        this.selectedIndex = -1;

        this.el.val(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 activeItem, offsetTop, upperBound, lowerBound;

      activeItem = this.activate(i);

      offsetTop = activeItem.offsetTop;

      upperBound = this.container.scrollTop();

      lowerBound = upperBound + this.options.maxHeight - 25;

      if (offsetTop < upperBound) {

        this.container.scrollTop(offsetTop);

      } else if (offsetTop > lowerBound) {

        this.container.scrollTop(offsetTop - this.options.maxHeight + 25);

      }

      //this.el.val(this.suggestions[i]);

    },



    onSelect: function(i) {

      var me, onSelect, getValue, s, d;

      me = this;

      onSelect = me.options.onSelect;

      getValue = function(value) {

        var del, currVal, arr;

        del = me.options.delimiter;

        if (!del) { return value; }

        currVal = me.currentValue;

        arr = currVal.split(del);

        if (arr.length === 1) { return value; }

        return currVal.substr(0, currVal.length - arr[arr.length - 1].length) + value;

      };

      s = me.suggestions[i];

      d = me.data[i];

      me.el.val(getValue(s));

      if ($.isFunction(onSelect)) { onSelect(s, d); }

    }



  };



}(jQuery));