var suggestions = null;
var suggestionLength = 17;
var divDisplayed = 17
var selectedDivId 		= "";
/**
 * An autosuggest textbox control.
 * @class
 * @scope public
 */
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;
    
    /**
     * 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]);
        }
        
        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;
	this.layer.style.width = 320;
    
    //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;
			oThis.textbox.value = oTarget.childNodes[oTarget.childNodes.length-1].nodeValue;
			selectedDivId = oTarget.id;
			setAJAXCheck(oThis.textbox.name);
			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 != "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 != "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*/) {
	oTarget = oEvent.target || oEvent.srcElement;
    switch(oEvent.keyCode) {
        case 38: //up arrow
			if(this.layer.style.visibility !="hidden")
				this.previousSuggestion();
				setAJAXCheck(this.textbox.name);
            break;
        case 40: //down arrow 
			if(this.layer.style.visibility !="hidden")
	            this.nextSuggestion();
	            setAJAXCheck(this.textbox.name);
            break;
        case 13: //enter
            //setAJAXCheck(this.textbox.name);
            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) {
        this.provider.requestSuggestions(this, false);
        //document.hotelsForm.AJAXCheck.value = '0';
        resetAJAXCheck(this.textbox.name);
    //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
        this.provider.requestSuggestions(this, true);
		//document.hotelsForm.AJAXCheck.value = '0';
		resetAJAXCheck(this.textbox.name);
    }
};

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

/**
 * 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();
};

/**
 * 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;
	var oDiv = null;
	//var lastDiv = null;
	var newDivText=null;
	var image = null;
	var actionType = "next";
	//adding child dynamically if user has reaced last option
	if(suggestions.length > cSuggestionNodes.length && this.cur == cSuggestionNodes.length-1 && suggestionLength <suggestions.length ){
		newDivText = suggestions[suggestionLength];
		if(suggestions.length -1 == suggestionLength)
			actionType =  "default"
		if(newDivText.indexOf("(") != -1)
			oDiv = this.createDiv("A",newDivText,actionType);
		else
			oDiv = this.createDiv("C",newDivText,actionType);
        
		this.layer.removeChild(cSuggestionNodes[0]);		
		/*replace down arrow image with blank image for last option
		lastDiv = cSuggestionNodes[cSuggestionNodes.length-1];
		this.replaceImage(lastDiv,"/objimages/blank.gif");	*/
		// append new div
		this.layer.appendChild(oDiv);
		this.highlightSuggestion(oDiv);
		this.textbox.value = (suggestions[suggestionLength].split("|"))[0];
		suggestionLength++		
	}
    if (cSuggestionNodes.length > 0 && this.cur < cSuggestionNodes.length-1) {		
        var oNode = cSuggestionNodes[++this.cur];
        this.highlightSuggestion(oNode);
          selectedDivId = oNode.id;
        //this.textbox.value = oNode.firstChild.nodeValue; 
		//for Airport use 2nd child node otherwise use 1st
			this.textbox.value = oNode.childNodes[oNode.childNodes.length-1].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;
	var oDiv = null;
	//firstDiv = null;
	var image = null;
	var newDivText=null;
	var actionType= "prev"
	//adding child dynamically if user has reaced last option
	if(suggestions[0] != this.textbox.value && this.cur == 0){
		newDivText = suggestions[suggestionLength - cSuggestionNodes.length - 1];
		if(suggestionLength == cSuggestionNodes.length + 1)
			actionType =  "default"
		if(newDivText.indexOf("(") != -1)
			oDiv = this.createDiv("A",newDivText,actionType);
		else
			oDiv = this.createDiv("C",newDivText,actionType);
		/*replace up arrow image with blank image for last option
		firstDiv = cSuggestionNodes[0];
		this.replaceImage(firstDiv,"/objimages/blank.gif");	*/
		//insert new div on top
		this.layer.insertBefore(oDiv,cSuggestionNodes[0]);
		this.layer.removeChild(this.layer.lastChild);
		//new last child should have  down arrow image
		//this.replaceImage(this.layer.lastChild,"/objimages/auto_select_down.gif");	
        this.highlightSuggestion(oDiv);
		this.textbox.value = (suggestions[suggestionLength - cSuggestionNodes.length - 1].split("|"))[0];
		suggestionLength--;		
	}
    if (cSuggestionNodes.length > 0 && this.cur > 0) {
        var oNode = cSuggestionNodes[--this.cur];
        this.highlightSuggestion(oNode);
        selectedDivId = oNode.id;
        //this.textbox.value = oNode.firstChild.nodeValue;   
		this.textbox.value = oNode.childNodes[oNode.childNodes.length-1].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*/) {
	
    suggestions = aSuggestions;
    var oDiv = null;
	var image = null;
	var imageType = "default";
    this.layer.innerHTML = "";  //clear contents of the layer
    //for (var i=0; i < aSuggestions.length; i++) {
	for (var i=0; i < aSuggestions.length && i < divDisplayed; i++) {
		//down arrow for last option
		if(i == divDisplayed -1 && aSuggestions.length > divDisplayed){
			imageType = "next";			
		}
		if(aSuggestions[i].indexOf("(") != -1)
			oDiv = this.createDiv("A",aSuggestions[i],imageType);
		else
			oDiv = this.createDiv("C",aSuggestions[i],imageType);
        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";
	//place curser at 1st position when style is set to visible
	this.cur = -1;
};

AutoSuggestControl.prototype.createDiv = function (type /*city:C or Airport:A*/,textForDiv /*text for Div*/,imageType /* next, prev or default */) {

	var oDiv = document.createElement("div");
	var textandId	= textForDiv.split("|");
	oDiv.style.width = 320;
	oDiv.setAttribute("id", textandId[1]);
	var image = null;
	var image1 = null;
	if(type == "A"){
		image = document.createElement("img");
		image.setAttribute("alt", "airport");
		image.setAttribute("width", "12");	
		image.setAttribute("height", "12");
		image.setAttribute("src", "/objimages/airport_icon.gif");
		oDiv.appendChild(image);		
	}
	 oDiv.appendChild(document.createTextNode(textandId[0]));
	
	/*image1 = document.createElement("img");
	if(imageType == "next"){
		image1.setAttribute("width", "12");	
		image1.setAttribute("height", "12");
		image1.setAttribute("src", "/objimages/auto_select_down.gif");			
	}
	else if (imageType == "prev"){
		image1.setAttribute("width", "12");	
		image1.setAttribute("height", "12");
		image1.setAttribute("src", "/objimages/auto_select_up.gif");
	}
	else{
		image1.setAttribute("width", "1");	
		image1.setAttribute("height", "1");
		image1.setAttribute("src", "/objimages/blank.gif");
	}
	oDiv.appendChild(image1);		*/
	return oDiv;
};

AutoSuggestControl.prototype.replaceImage = function (oDiv /*div tag*/,imageName /*:String*/) {
	var image = null;
	
	oDiv.removeChild(oDiv.childNodes[oDiv.childNodes.length-1]);
	image = document.createElement("img");
	image.setAttribute("width", "12");	
	image.setAttribute("height", "12");
	image.setAttribute("src", imageName);
	oDiv.appendChild(image);
}
/**
 * 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; 
        this.selectRange(iLen, sSuggestion.length);
    }
};

function setAJAXCheck(name){
	if(name=='City'){
		document.hotelsForm.AJAXCheck.value = '1';
		document.hotelsForm.AJAXCheck1.value = '1';
		document.hotelsForm.cityId.value = selectedDivId;
	}else if(name=='pickupCity' ){
		document.carsForm.AJAXCheck.value = '1';
		document.carsForm.cityId.value = selectedDivId;
	}else if(name=='DepartureCity'){
		document.flightsForm.AJAXCheck.value = '1';
		document.flightsForm.cityId.value = selectedDivId;
	}else if(name=='ArrivalCity'){
		document.flightsForm.AJAXCheck1.value = '1';
		document.flightsForm.cityId1.value = selectedDivId;
	}else if(name=='dropoffCity'){
		document.carsForm.AJAXCheck1.value = '1';
		document.carsForm.cityId1.value = selectedDivId;
	}else if(name=='innerCity'){
		document.innerForm.AJAXCheck.value = '1';	
		document.innerForm.cityId.value = selectedDivId;
	}
}
function resetAJAXCheck(name){
	if(name=='City'){
		document.hotelsForm.AJAXCheck.value = '0';
		document.hotelsForm.AJAXCheck1.value = '0';
	}else if(name=='pickupCity' ){
		document.carsForm.AJAXCheck.value = '0';
	}else if(name=='DepartureCity'){
		document.flightsForm.AJAXCheck.value = '0';
	}else if(name=='ArrivalCity'){
		document.flightsForm.AJAXCheck1.value = '0';
	}else if(name=='dropoffCity'){
		document.carsForm.AJAXCheck1.value = '0';
	}else if(name=='innerCity'){
		document.innerForm.AJAXCheck.value = '0';	
	}
}