/**
 * An autosuggest textbox control.
 * @class
 * @scope public
 * Расширеная версия
 */
function AutoSuggestControl(oTextbox /*:HTMLInputElement*/,
														oProvider /*:SuggestionProvider*/){

		/**
		 * The currently selected suggestions.
		 * @scope private
		 */
		this.cur /*:int*/ = -1;

		/**
		 * The dropdown list layer.
		 * @scope private
		 */
		this.layer = null;
		this.timeout = null;

		/**
		 * Suggestion provider for the autosuggest feature.
		 * @scope private.
		 */
		this.provider /*:SuggestionProvider*/ = oProvider;

		/**
		 * The textbox to capture.
		 * @scope private
		 */
		this.textbox /*:HTMLInputElement*/ = oTextbox;

		//initialize the control
		this.init();

}

/**
 * Autosuggests one or more suggestions for what the user has typed.
 * If no suggestions are passed in, then no autosuggest occurs.
 * @scope private
 * @param aSuggestions An array of suggestion strings.
 * @param bTypeAhead If the control should provide a type ahead suggestion.
 */
AutoSuggestControl.prototype.autosuggest = function (aSuggestions /*:Array*/,
																										 bTypeAhead /*:boolean*/){

		//make sure there's at least one suggestion
		if(aSuggestions.length > 0){
				//if(bTypeAhead){this.typeAhead(aSuggestions[0]);} # Убрали авто выбор первой позиции

				this.showSuggestions(aSuggestions);
		} else {
				this.hideSuggestions();
		}
};

/**
 * Creates the dropdown layer to display multiple suggestions.
 * @scope private
 */
AutoSuggestControl.prototype.createDropDown = function (){

		var oThis = this;

		//create the layer and assign styles
		this.layer = document.createElement("div");
		this.layer.className = "suggestions";
		this.layer.style.visibility = "hidden";
		this.layer.style.width = this.textbox.offsetWidth;

		//when the user clicks on the a suggestion, get the text (innerHTML)
		//and place it into a textbox

		this.layer.onmousedown =
		this.layer.onmouseup =
		this.layer.onmouseover = function (oEvent){
				oEvent = oEvent || window.event;
				oTarget = oEvent.target || oEvent.srcElement;

				if(oEvent.type == "mousedown"){
					 //oThis.textbox.value = oTarget.firstChild.nodeValue;
           //for(var k in oTarget) if(oTarget[k]) console.log(k+'='+oTarget[k]);
           document.location = oTarget.parentNode.id?oTarget.parentNode.id:oTarget.id;
					 oThis.hideSuggestions();
				} else if(oEvent.type == "mouseover"){
					 oThis.highlightSuggestion(oTarget);
				} else {
					 oThis.textbox.focus();
				}
		};

		document.body.appendChild(this.layer);
};

/**
 * Gets the left coordinate of the textbox.
 * @scope private
 * @return The left coordinate of the textbox in pixels.
 */
AutoSuggestControl.prototype.getLeft = function () /*:int*/ {

		var oNode = this.textbox;
		var iLeft = 0;

		while(oNode.tagName != "HTML" && oNode.tagName != "BODY"){
			iLeft += oNode.offsetLeft;
			oNode = oNode.offsetParent;
		}

		return iLeft;
};

/**
 * Gets the top coordinate of the textbox.
 * @scope private
 * @return The top coordinate of the textbox in pixels.
 */
AutoSuggestControl.prototype.getTop = function () /*:int*/ {

		var oNode = this.textbox;
		var iTop = 0;

		while(oNode.tagName != "HTML" && oNode.tagName != "BODY"){
				iTop += oNode.offsetTop;
				oNode = oNode.offsetParent;
		}

		return iTop;
};

/**
 * Handles three keydown events.
 * @scope private
 * @param oEvent The event object for the keydown event.
 */
AutoSuggestControl.prototype.handleKeyDown = function (oEvent /*:Event*/){

		switch(oEvent.keyCode){
				case 38: //up arrow
						this.previousSuggestion();
						break;
				case 40: //down arrow
						this.nextSuggestion();
						break;
				case 13: //enter
						this.textbox.form.onsubmit = function(){return false;}
            this.clickNavigation();
						this.hideSuggestions();
						break;
		}

};

/**
 * Handles keyup events.
 * @scope private
 * @param oEvent The event object for the keyup event.
 */
AutoSuggestControl.prototype.handleKeyUp = function (oEvent /*:Event*/){

		var iKeyCode = oEvent.keyCode;

		//for backspace (8) and delete (46), shows suggestions without typeahead
		if(iKeyCode == 8 || iKeyCode == 46){
				if(this.textbox.value.length>=3){
					var This = this;
					if(this.timeout){ clearTimeout(this.timeout); this.timeout=null; }
					this.timeout = setTimeout(function(){ This.provider.requestSuggestions(This, false); }, 500);
				}

		//make sure not to interfere with non-character keys
		} else if(iKeyCode < 32 || (iKeyCode >= 33 && iKeyCode < 46) || (iKeyCode >= 112 && iKeyCode <= 123)){
				//ignore
		} else {
				//request suggestions from the suggestion provider with typeahead
				//var date = new Date(); var curDate = null; do { curDate = new Date(); } while(curDate-date < 500);
				//
				if(this.textbox.value.length>=3){
					var This = this;
					if(this.timeout){ clearTimeout(this.timeout); this.timeout=null; }
					this.timeout = setTimeout(function(){ This.provider.requestSuggestions(This, true); }, 500);
				}
		}
};

/**
 * Hides the suggestion dropdown.
 * @scope private
 */
AutoSuggestControl.prototype.hideSuggestions = function (){
		this.layer.style.visibility = "hidden";
		clearTimeout();
};

/**
 * Highlights the given node in the suggestions dropdown.
 * @scope private
 * @param oSuggestionNode The node representing a suggestion in the dropdown.
 */
AutoSuggestControl.prototype.highlightSuggestion = function (oSuggestionNode){

		for(var i=0; i < this.layer.childNodes.length; i++){
				var oNode = this.layer.childNodes[i];
				if(oNode == oSuggestionNode){
						oNode.className = "current"
				} else if(oNode.className == "current"){
						oNode.className = "";
				}
		}
};

/**
 * Initializes the textbox with event handlers for
 * auto suggest functionality.
 * @scope private
 */
AutoSuggestControl.prototype.init = function (){

		//save a reference to this object
		var oThis = this;

		//assign the onkeyup event handler
		this.textbox.onkeyup = function (oEvent){

				//check for the proper location of the event object
				if(!oEvent){
						oEvent = window.event;
				}

				//call the handleKeyUp() method with the event object
				oThis.handleKeyUp(oEvent);
		};

		//assign onkeydown event handler
		this.textbox.onkeydown = function (oEvent){

				//check for the proper location of the event object
				if(!oEvent)
						oEvent = window.event;

				//call the handleKeyDown() method with the event object
				oThis.handleKeyDown(oEvent);
		};

		//assign onblur event handler (hides suggestions)
		this.textbox.onblur = function (){
			oThis.hideSuggestions();
		};

		//create the suggestions dropdown
		this.createDropDown();
};

AutoSuggestControl.prototype.clickNavigation = function (){
		var cSuggestionNodes = this.layer.childNodes;

		if(cSuggestionNodes.length > 0 && this.cur < cSuggestionNodes.length-1){
				var oNode = cSuggestionNodes[this.cur];
				document.location = oNode.id;
		}
};

/**
 * Highlights the next suggestion in the dropdown and
 * places the suggestion into the textbox.
 * @scope private
 */
AutoSuggestControl.prototype.nextSuggestion = function (){
		var cSuggestionNodes = this.layer.childNodes;

		if(cSuggestionNodes.length > 0 && this.cur < cSuggestionNodes.length-1){
				var oNode = cSuggestionNodes[++this.cur];
				this.highlightSuggestion(oNode);
				//this.textbox.value = oNode.firstChild.nodeValue;
		}
};

/**
 * Highlights the previous suggestion in the dropdown and
 * places the suggestion into the textbox.
 * @scope private
 */
AutoSuggestControl.prototype.previousSuggestion = function (){
		var cSuggestionNodes = this.layer.childNodes;

		if(cSuggestionNodes.length > 0 && this.cur > 0){
				var oNode = cSuggestionNodes[--this.cur];
				this.highlightSuggestion(oNode);
				//this.textbox.value = oNode.firstChild.nodeValue;
		}
};

/**
 * Selects a range of text in the textbox.
 * @scope public
 * @param iStart The start index (base 0) of the selection.
 * @param iLength The number of characters to select.
 */
AutoSuggestControl.prototype.selectRange = function (iStart /*:int*/, iLength /*:int*/){

		//use text ranges for Internet Explorer
		if(this.textbox.createTextRange){
				var oRange = this.textbox.createTextRange();
				oRange.moveStart("character", iStart);
				oRange.moveEnd("character", iLength - this.textbox.value.length);
				oRange.select();

		//use setSelectionRange() for Mozilla
		} else if(this.textbox.setSelectionRange){
				this.textbox.setSelectionRange(iStart, iLength);
		}

		//set focus back to the textbox
		this.textbox.focus();
};

/**
 * Builds the suggestion layer contents, moves it into position,
 * and displays the layer.
 * @scope private
 * @param aSuggestions An array of suggestions for the control.
 */
AutoSuggestControl.prototype.showSuggestions = function (aSuggestions /*:Array*/){

		var oDiv = null;
		this.layer.innerHTML = "";	//clear contents of the layer

		for(var i=0; i < aSuggestions.length; i++){
				oDiv = document.createElement("div");
        oDiv.id = "/hotel/"+aSuggestions[i][0]+"-"+aSuggestions[i][2]+".html";
				//oDiv.appendChild(document.createTextNode(aSuggestions[i][1]));
        oDiv.innerHTML = aSuggestions[i][1];
				//oDiv.nowrap='nowrap';
				oDiv.style.whiteSpace='nowrap';
				this.layer.appendChild(oDiv);
		}

		this.layer.style.left = this.getLeft() + "px";
		this.layer.style.top = (this.getTop()+this.textbox.offsetHeight) + "px";
		this.layer.style.visibility = "visible";
		this.layer.style.width = this.textbox.offsetWidth+"px";

};

/**
 * Inserts a suggestion into the textbox, highlighting the
 * suggested part of the text.
 * @scope private
 * @param sSuggestion The suggestion for the textbox.
 */
AutoSuggestControl.prototype.typeAhead = function (sSuggestion /*:String*/){

		//check for support of typeahead functionality
		if(this.textbox.createTextRange || this.textbox.setSelectionRange){
				var iLen = this.textbox.value.length;
				this.textbox.value = sSuggestion[1];
				this.selectRange(iLen, sSuggestion.length);
		}
};