/**
 * An autosuggest textbox control.
 * @class
 * @scope public
 */
function AutoSuggestControl(oTextbox /*:HTMLInputElement*/, 
                            oProvider /*:SuggestionProvider*/) {
    
    /**
     * The currently selected suggestions.
     * @scope private
     */   
    this.cur /*:int*/ = -1;
	this.selectedID /*:int*/ = -1;
	this.diference /*:int*/ = 0;
	this.keep_word="";

    /**
     * The dropdown list layer.
     * @scope private
     */
    this.layer = null;
    this.aSuggestionsID = [];
    /**
     * 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*/,
													 aSuggestionsID /*:Array*/,
                                                     bTypeAhead /*:boolean*/) {

    //make sure there's at least one suggestion
    if (aSuggestions.length > 0) {
        if (bTypeAhead) {
		//  this.typeAhead(aSuggestions[0]);
        }
        this.aSuggestionsID=aSuggestionsID;
        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.whiteSpace="nowrap";
    //when the user clicks on the a suggestion, get the text (innerHTML)
    //and place it into a textbox
	this.layer.onclick =
    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.Enter();
            oThis.hideSuggestions();
			

        } else if (oEvent.type == "mouseover") {
			//oThis.textbox.value = oTarget.firstChild.nodeValue;
            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*/) {
    switch(oEvent.keyCode) {
        case 38: //up arrow
            this.previousSuggestion();
            break;
        case 40: //down arrow 
            this.nextSuggestion();
            break;
        case 13: //enter
			this.Enter();
            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;
	this.keyDownPreV=this.keyDownNow;
    //for backspace (8) and delete (46), shows suggestions without typeahead
    if (iKeyCode == 8 || iKeyCode == 46) {
		this.cur=-1;
        //this.provider.requestSuggestions(this, false);
		 var iLen = this.textbox.value.length; 
		if(  iLen>0 ){
			this.ShowExistingSuggestions();
		}else{
		    this.hideSuggestions();
		}
        
    //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.cur=-1;
		 var naptime =800;
         var go = false;
         var now = new Date();
         var alarm = new Date();
         var alarmMSeconds = alarm.getTime();
		 var inputWord = this.textbox.value;
		 var inLen = inputWord.length; 
		 var ikeepLen = this.keep_word.length;
		 var n=0;

		 if(inLen>3){
				 if(ikeepLen<inLen){
					 var temp=inputWord.substring(0,ikeepLen);
					 if(ikeepLen>0){
						  if(!(temp.toUpperCase() == this.keep_word.toUpperCase())) {
							  go = true;
							   n = 1;
							 //  document.getElementById('footer').innerHTML=document.getElementById('footer').innerHTML +"ikeep, less, different<br>";
						  }else{
							   var nana=inLen-ikeepLen;
							   // document.getElementById('footer').innerHTML=document.getElementById('footer').innerHTML +"ikeep, less,equal<br>";
							  if(nana>=3){
								   this.keep_word= this.textbox.value;
								 //  document.getElementById('footer').innerHTML=document.getElementById('footer').innerHTML +"ikeep, less,equal great than 3<br>";
								   go = true;	  
								   n  = 1;
							  }	  			  
						  }	
					 }else{
						//  document.getElementById('footer').innerHTML=document.getElementById('footer').innerHTML +"ikeep,equ zero<br>";
						 	 go = true;
							  n = 1;					 
					 }
				 }else{
					 var temp=this.keep_word.substring(0,inLen);
					 if((inputWord.toUpperCase() == temp.toUpperCase())) {
						// document.getElementById('footer').innerHTML=document.getElementById('footer').innerHTML +"ikeep,great than equal";
						  n = 2;
						  go = false;
					  }else{
						  go = true;
						 // document.getElementById('footer').innerHTML=document.getElementById('footer').innerHTML +"ikeep,great than different";
						  n	 = 1;					  
					  }
					  
				 }
				 
				 if(alarmMSeconds - this.diference > naptime){
					 this.keep_word= this.textbox.value;
					 this.diference= now.getTime();		 
				 }
				 if(this.textbox.name=='search_artist'){
					 go=false;
				 }
				 if(go){		
						//document.getElementById('footer').innerHTML=document.getElementById('footer').innerHTML +"GOOOOS<br><font color='white'>"+inputWord+"<br>"+this.keep_word+"<br>"+ikeepLen+"<br>"+inLen+"<br>";				
						
				 }else{
					    //n = 2;
						//document.getElementById('footer').innerHTML=document.getElementById('footer').innerHTML +"FAILS <br><font color='white'>"+inputWord+"<br>"+this.keep_word+"<br>"+ikeepLen+"<br>"+inLen+"<br>";				
				  
				 }   
				 switch(n){
						case 1:
							this.provider.requestSuggestions(this, true); 
						break;    
						case 2:
							this.ShowExistingSuggestions();
						break;
						default:

				} 
		}




    }
};

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

/**
 * Show the existing  suggestion dropdown.
 * @scope private
 */
AutoSuggestControl.prototype.ShowExistingSuggestions = function () {
    this.layer.style.visibility = "visible";
};

/**
 * 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"
			this.selectedID=this.aSuggestionsID[i];

        } 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;
		//alert(this.cur);
    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.appendChild(document.createTextNode(aSuggestions[i]));
        this.layer.appendChild(oDiv);
    }
	var plus=0;

	var ua = navigator.userAgent;
	if (ua.indexOf("Firefox") > -1 ) {
	}else{
		if(document.getElementById('bodyintoiframe')){
			plus=10;
		}
	
	
	}


    this.layer.style.left = this.getLeft()+plus + "px";

    this.layer.style.top = (this.getTop()+plus+this.textbox.offsetHeight) + "px";
	this.layer.style.zIndex=9999;

    this.layer.style.visibility = "visible";
	

};

/**
 * 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);
    }
};
AutoSuggestControl.prototype.getURLParam= function (strParamName){
  var strReturn = "";
  var strHref = window.location.href;
  if ( strHref.indexOf("?") > -1 ){
    var strQueryString = strHref.substr(strHref.indexOf("?")).toLowerCase();
    var aQueryString = strQueryString.split("&");
    for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
      if (aQueryString[iParam].indexOf(strParamName.toLowerCase() + "=") > -1 ){
        var aParam = aQueryString[iParam].split("=");
        strReturn = aParam[1];
        break;
      }
    }
  }
  return unescape(strReturn);
} ;
AutoSuggestControl.prototype.getURLParamDue= function (strParamName){
  var strReturn = "";
  var strHref = window.location.href;
  if ( strHref.indexOf(".php") > -1 ){
    var strQueryString = strHref.substr(strHref.indexOf(".php")).toLowerCase();
    var aQueryString = strQueryString.split("/");
    for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
		
      if (aQueryString[iParam].indexOf(strParamName.toLowerCase() + "_") > -1 ){
        var aParam = aQueryString[iParam].split("_");
        strReturn = aParam[1];
        break;
      }
    }
  }
  return strReturn;
} ;
AutoSuggestControl.prototype.Enter = function () {
	var output="";
	var output2="";
	var go=false;
	if(this.textbox.value.length<2){
		go=false;
	}else{
		  var cSuggestionNodes = this.layer.childNodes;
		  output2=this.textbox.value;
		  for (var i=0; i < this.aSuggestionsID.length; i++) {
				if (this.selectedID == this.aSuggestionsID[i]) {
						var oNode = cSuggestionNodes[i];
						var com = oNode.firstChild.nodeValue.toLowerCase();
						if(output2.toLowerCase() == com && output2.length==com.length){
							output=this.selectedID;
							go=true;
						} 

					}

		   }
		if(!go){
		 for (var i=0; i < this.aSuggestionsID.length; i++) {
							var oNode = cSuggestionNodes[i];
							var com = oNode.firstChild.nodeValue.toLowerCase();
							if(output2.toLowerCase() == com && output2.length==com.length){
								output= this.aSuggestionsID[i];
								go=true;
							}
					}
		}

	}
	if(output.length>0){
		url="/content.php/ai_"+output+"/ainame_"+output2;
	}else{
		url="/content.php/type_search/search_"+output2;		
		if(output2.length<2){
			go= false;
		}else{
			go=true;
		
		}
	
	}
	if(this.textbox.name=='search_artist'){
		output2=this.textbox.value;
		if(output2.length>2){
			url="/content.php/type_search/search_"+output2
			if(this.getURLParamDue('ai')){
				url+="/ai_"+this.getURLParamDue('ai');
			}
			if(this.getURLParamDue('ainame')){
				url+="/ainame_"+this.getURLParamDue('ainame');
			}
		  go=true;
		}else{
			go=false;
		}
	}
	if(go){
	 	window.location=url;
	}else{
		
	  return false;
	}

};