/**
*  Ajax Autocomplete for jQuery, version 1.1.3
*  (c) 2010 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: 04/19/2010
*/

/*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); //ссылка на текстовое поле
    this.el.attr('autocomplete', 'off');
    this.suggestions = [];
    this.data = [];
    this.badQueries = [];
    this.selectedIndex = -1;
    this.currentValue = this.el.val(); //то, что в текстовом поле хранится. т.е. в input type=text
    this.intervalId = 0;
    this.cachedResponse = [];
    this.onChangeInterval = null;
    this.ignoreValueChange = true;
    this.serviceUrl = options.serviceUrl;
    this.isLocal = false;
    this.valElement = $(options.valElement), // ссылка на компонент с value
    this.showEntireList = false,
    this.autoSubmitEnter = false;
    this.options = {
      autoSubmit: false,
      minChars: 1,
      maxHeight: 300,
      deferRequestBy: 0,
      width: 0,
      highlight: true,
      params: {},
      fnFormatResult: fnFormatResult,
      delimiter: null,
      zIndex: 9999,
      listClassOpt: options.listClass || ""
    };
    this.initialize();
    this.setOptions(options);
  }
  
  $.fn.autocomplete = function(options) {
    return new Autocomplete(this.get(0)||$('<input />'), options);
  };


  Autocomplete.prototype = {

    killerFn: null,

    initialize: function() {

      var me, uid, autocompleteElId;
      me = this;
      uid = Math.floor(Math.random()*0x100000).toString(16);
      autocompleteElId = 'Autocomplete_' + uid;

      this.killerFn = function(e) {
        if ($(e.target).parents('.vs-combobox-list').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="vs-combobox-list-w1"><div class="vs-combobox-list vs-combobox-list-shadow ' + this.options.listClassOpt + '" id="' + autocompleteElId + '" style="display:none;"></div></div></div>').appendTo('body');

      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.autoSubmitEnter = true;
    	  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 });
    },
    
    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() - 1) + '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;
      
      if(!me.el.get(0).readOnly){
	      if (me.selectedIndex === -1 && !this.ignoreValueChange) {
	    	  me.el.val("");
	    	  me.valElement.val("");
	    	  me.el.removeClass("bad-text");
	        }else if (me.selectedIndex !== -1){
	        	me.select(me.selectedIndex);
	        	me.selectedIndex = -1;
	        }
      }
      
      
      this.stopKillSuggestions();
      this.intervalId = window.setInterval(function() { me.hide(); me.selectedIndex = -1; 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.valElement.val(""); 
          this.hide();
          this.selectedIndex = -1;
          break;
        case 9: //KEY_TAB: уходим по табу
        	if (this.selectedIndex === -1) {
            	  this.el.val("");
            	  this.valElement.val("");
            	  this.currentValue = this.el.val();
              	  this.el.removeClass("bad-text");
              	  this.hide();
            	  return;
              }
              this.select(this.selectedIndex);
              this.hide();
              //this.selectedIndex = -1;
              if(e.keyCode === 9){ return; }
              break;        	
        case 13: //KEY_RETURN:
            this.autoSubmitEnter = true;
        	break;//не знаю
        case 38: //KEY_UP:
            this.autoSubmitEnter = false;
        	break;
        case 40: //KEY_DOWN:
            this.autoSubmitEnter = false;
        	break;
        default:
          return;
      }
      e.stopImmediatePropagation();
      e.preventDefault();
    },

    onKeyUp: function(e) {
      if(this.disabled){ return; }
           
      switch (e.keyCode) {
        case 9: //KEY_TAB:
        	if (this.selectedIndex === -1) {//т.е. уже выбрали или просто кривое значение
        		return;
        	}//если не выбрали то выбираем, т.е. аналогично нажатию enter
        case 13:
            if (this.selectedIndex === -1) {
          	  this.el.val("");
          	  this.valElement.val("");
          	  this.currentValue = this.el.val();
            	  this.el.removeClass("bad-text");
            	  this.hide();
          	  return;
            }
            this.autoSubmitEnter = true;
            this.select(this.selectedIndex);
            this.hide();
            //this.selectedIndex = -1;
            if(e.keyCode === 9){ return; }
            break;
            
        case 38: //KEY_UP:
        	if(!this.enabled){

        		this.showEntireList = true;
        		this.ignoreValueChange = false;
    			
        		this.onValueChange();
    			
        		this.showEntireList = false;
        		this.ignoreValueChange = true;        		
        	}
        	this.autoSubmitEnter = false;
            this.moveUp();
            break;
        case 40: //KEY_DOWN:
        	if(!this.enabled){
        		/*var cr, q = '';
	          	cr = this.isLocal ? this.getSuggestionsLocal(q) : this.cachedResponse[q];
	      	    if (cr && $.isArray(cr.suggestions)) {
	      	      this.suggestions = cr.suggestions;
	      	    }
      	        if(cr.selected.length > 0){
      	        	this.selectedIndex =  cr.selected[0];
      	        	this.activate(cr.selected[0]);
      	        }
      	        
	      	  this.getSuggestions('');
	      	  */
        		this.showEntireList = true;
        		this.ignoreValueChange = false;
    			
        		this.onValueChange();
    			
        		this.showEntireList = false;
        		this.ignoreValueChange = true;        		
        	}
        	this.autoSubmitEnter = false;
            this.moveDown();
            break
        case 27:        	
          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() {
      clearInterval(this.onChangeInterval);
      this.currentValue = this.el.val();
      var q = this.getQuery(this.currentValue);
      //this.selectedIndex = -1;
      if (this.ignoreValueChange) {
        this.ignoreValueChange = false;
        return;
      }
      this.getSuggestions(q);
      /*if (q.length < this.options.minChars) {//q === '' || 
    	this.selectedIndex = -1;
        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, name;
      arr = this.options.lookup;
      len = arr.suggestions.length;
      ret = { suggestions:[], data:[], selected: [] };
      q = q.toLowerCase();
      for(i=0; i< len; i++){
    	name = arr.suggestions[i]['name'];
    	value = arr.suggestions[i]['value'];
    	
    	if((!this.showEntireList && name.toLowerCase().indexOf(q) != -1) || this.showEntireList){
            ret.suggestions.push(arr.suggestions[i]);
            ret.data.push(arr.data[i]);
        }     	
    	
        if(this.showEntireList){
            if(name.toLowerCase() === this.el.val().toLowerCase()){
            	ret.selected.push(ret.suggestions.length - 1);
            }         	
        }else{
            if(name.toLowerCase() === q){
            	ret.selected.push(ret.suggestions.length - 1);
            }        	
        }
      }
      return ret;
    },
    
    getSuggestions: function(q) {
      var cr, me, divs, activeItem;
      this.fixPosition();
      cr = this.isLocal ? this.getSuggestionsLocal(q) : this.cachedResponse[q];
      if (cr && $.isArray(cr.suggestions)) {
        this.suggestions = cr.suggestions;
        this.data = cr.data;
        
        if(cr.selected.length > 0){        	
        	this.selectedIndex =  cr.selected[0];
        	//this.activate(cr.selected[0]); //!!!!
        	this.valElement.val(this.suggestions[this.selectedIndex]['value']);
        	
        }
        else{
        	this.selectedIndex = -1;
        	this.valElement.val("");
        }
        
        
        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.el.addClass('bad-text');
        this.selectedIndex = -1;
    	this.hide();
        return;
      }
      
      var me, len, div, f, v, i, s, n, mOver, mClick;
      me = this;
      len = this.suggestions.length;
      f = this.options.fnFormatResult;
      v = this.getQuery(me.el.val());
      mOver = function(xi) { return function() { me.activate(xi); }; };
      mClick = function(xi) { return function() { 
    	  	me.select(xi);  me.hide(); 
    	  	//me.selectedIndex = -1;
    	 }; };
      this.container.hide().empty();
      for (i = 0; i < len; i++) {
        s = this.suggestions[i]['name'];
        div = $((me.selectedIndex === i ? '<div class="selected ' + (this.showEntireList ? ' selected-div"' : '"') : '<div') + ' title="' + s + '">' + f(s, this.data[i], v) + '</div>');
        div.mouseover(mOver(i));
        div.click(mClick(i));
        if((div.find("strong").length > 0) && this.el.hasClass('bad-text'))
        	this.el.removeClass('bad-text');
        this.container.append(div);
      }
      
      
      this.container.width(this.el.get(0).clientWidth + 21 - 10);  
      
      
      this.enabled = true;
      this.container.show();
      
    },
    
    processResponse: function(text) {
      var response;
      try {
        response = eval('(' + text + ')');
      } catch (err) { return; }
      if (!$.isArray(response.data)) { response.data = []; }
      if(!this.options.noCache){
        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)).removeClass('selected');
      }
      this.selectedIndex = index;
      if (this.selectedIndex !== -1 && divs.length > this.selectedIndex) {
        activeItem = divs.get(this.selectedIndex);
        $(activeItem).addClass('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]['name'];
      
      if (selectedValue) {
        if(this.el.hasClass('bad-text'))
        	this.el.removeClass('bad-text');
        this.el.val(selectedValue);
        this.valElement.val(this.suggestions[i]['value']);
        if (this.options.autoSubmit) {
          f = this.el.parents('form');
          if (f.length > 0) { f.get(0).submit(); }
        }
        this.ignoreValueChange = true;
        this.onSelect(i);
      }
    },

    moveUp: function() {
      if (this.selectedIndex === -1) { 
    	  return; 
      }
      if (this.selectedIndex === 0) {
    	  return;
      }
      this.adjustScroll(parseInt(this.selectedIndex) - 1);
    },

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

    adjustScroll: function(i) {
      if(this.enabled){
          var activeItem, offsetTop, upperBound, lowerBound;
          activeItem = this.activate(i); 
          if(activeItem != null){
              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.selectedIndex = i;
      this.select(i);
    },

    onSelect: function(i) {
      var me, fn, s, d;
      me = this;
      fn = me.options.onSelect;
      s = me.suggestions[i];
      d = me.data[i];
      me.el.val(me.getValue(s)['name']);
      if(this.autoSubmitEnter){
    	  if ($.isFunction(fn)) {
    		  this.autoSubmitEnter = false;
    		  fn(s, d, me.el); 
    	  }
      }
    },
    
    getValue: function(value){
        var del, currVal, arr, me;
        me = this;
        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;
    }

  };

}(jQuery));