var lastindex=-1;
var search_prompt_flag=false;
var listlength=0;
function StringBuffer(){this.data=[];} 
StringBuffer.prototype.append=function(){this.data.push(arguments[0]);return this;} 
StringBuffer.prototype.tostring=function(){return this.data.join("");} 
String.prototype.Trim = function(){return this.replace(/(^\s*)|(\s*$)/g, "");}

var XmlResultBuffer={
	data : {},
	append : function(key,value){this.data[key]=value},
	inBuffer : function(key){if(this.data[key]){return true}else{return false}},
	getBuffer : function(key){if(this.data[key]){return this.data[key]}else{return}}
	
}
var RequestDelayHandle=0;

function hiddensearch(){
	if(!$('search_prompt_list') || !$('search_prompt_frame') )return;
	$('search_prompt_list').style.display="none";
	$('search_prompt_frame').style.display="none";
}
function showsearch(num){
	if(!$('search_prompt_list') || !$('search_prompt_frame') )return;
    $('search_prompt_list').style.display='';
    $('search_prompt_frame').style.display='';
    $('search_prompt_list').style.height=num*20+num+'px';
    $('search_prompt_frame').style.height=num*20+num+2+'px';
}
/*
function getposition(element,offset){
    var c=0;
    while(element){
        c+=element[offset];
        element=element.offsetParent
    }
    return c;
}
*/
function createlist(){
	//边框
	//var listDiv=document.createElement("div");
	//listDiv.id="search_prompt_list";
	var listDiv=$("search_prompt_list");        
	listDiv.style.zIndex="2";
	listDiv.style.position="absolute"; 
	listDiv.style.border="solid 1px #7D7D7D";
	listDiv.style.backgroundColor="#FFFFFF";
	listDiv.style.display="none";	
	listDiv.style.width=$('headq').clientWidth+"px";
	
	//listDiv.style.left=getposition($('headq'),'offsetLeft')+0+"px";
	//listDiv.style.top =(getposition($('headq'),'offsetTop')+$('headq').clientHeight +1)+"px";
	
	//内容容器
	//var listFrame=document.createElement("iframe");
	//listFrame.id="search_prompt_frame";
	var listFrame=$("search_prompt_frame");
	listFrame.style.zIndex="1";
	listFrame.style.position="absolute";
	listFrame.style.border="0";
	listFrame.style.display="none";	
	listFrame.style.width=$('headq').clientWidth+"px";
	
	//listFrame.style.left=getposition($('headq'),'offsetLeft')+1+"px";
	//listFrame.style.top =(getposition($('headq'),'offsetTop')+$('headq').clientHeight +3)+"px";
	//document.body.appendChild(listDiv);       
	//document.body.appendChild(listFrame);
}
function setstyle(element,classname){
	switch (classname){
        case 'm':
            element.style.fontSize="12px";
		    element.style.fontFamily="arial,sans-serif";
		    element.style.backgroundColor="#3366cc";
		    element.style.color="black";
		    element.style.width=$('headq').clientWidth-10+"px";
		    element.style.height="20px";
            element.style.padding="1px 5px 0px 5px";
            if(element.displayTitleSpan)element.displayTitleSpan.style.color="white";
            if(element.displayHitSpan)element.displayHitSpan.style.color="white";
		    break;
        case 'd':
	        element.style.fontSize="12px";
		    element.style.fontFamily="arial,sans-serif";
		    element.style.backgroundColor="white";
		    element.style.color="black";
		    element.style.width=$('headq').clientWidth-10+"px";
		    element.style.height="20px";
            element.style.padding="1px 5px 0px 5px";
            if(element.displayTitleSpan)element.displayTitleSpan.style.color="black";
            if(element.displayHitSpan)element.displayHitSpan.style.color="#909090";
		    break;
	 case 't':
            element.style.width="60%";
            element.setStyle({cssFloat:"left"});
			element.style.display='block';
            element.style.whiteSpace="nowrap";
            element.style.overflow="hidden";
            element.style.textOverflow="ellipsis";
            element.style.fontSize="12px";
            element.style.textAlign="left";
            break;
	 case 'h':
            element.style.width="40%";
            element.setStyle({cssFloat:"left"});
			element.style.display='block';
            element.style.textAlign="right";
            element.style.color="#909090";
            break;
    }
}
function focusitem(index){
    if($('item'+lastindex)!=null)setstyle($('item'+lastindex),'d');
    if($('item'+index)!=null){
        setstyle($('item'+index), 'm');
        lastindex=index;
    }else{
        lastindex=-1;
        $("headq").focus();
    }
}
function searchclick(index){
    if(index){
        $("headq").value=$('title'+index).innerHTML;
        search_prompt_flag=true;
    }else{
        if($('title'+lastindex)!=null){
            $("headq").value=$('title'+lastindex).innerHTML;
            search_prompt_flag=true;
        }
    }
}
function searchformsubmit(){
	if( dosearch($("headq").form) ){
    	$("headq").form.submit();
    }	
}

function searchkeydown(e){
	if(!$('search_prompt_list') || !$('search_prompt_frame') )return;
    if($('search_prompt_list').innerHTML=='')return;
    var keycode=(window.navigator.appName=="Microsoft Internet Explorer")?event.keyCode:e.which;
    
    //down
    if(keycode==40){
	   if(lastindex==-1||lastindex==listlength-1){
	       focusitem(0);
	       searchclick(0);
	   }else{
	       focusitem(lastindex+1);
	       searchclick();
	   }
    }
    //up
    if(keycode==38){
	   if(lastindex==-1 && listlength>0){
	       //focusitem(0);
	       //searchclick(0);
	       focusitem(listlength-1);
	       searchclick(listlength-1);
	   }else{
	       focusitem(lastindex-1);
	       searchclick();
	   }
    }
    //enter
    if(keycode==13){
        if(lastindex!=-1){
            focusitem(lastindex);
            $("headq").value=$('title'+lastindex).innerHTML;
        }
        hiddensearch();
    }
    //backspace || delete
    if(keycode==46||keycode==8){search_prompt_flag=false;ajaxsearch();}
}
function showresult(responseText,buffer){
	if(typeof(responseText)!="string")return;
	if(responseText.Trim()=="")return;
	var result=eval(responseText);
	
	if(typeof(result)!="object")return;
	if(!buffer){
		XmlResultBuffer.append(result.keyword+result.type,responseText);
	}
	switch(result.type){
		case 'video':type='视频';break;
		case 'playlist':type='专辑';break;
		case 'user':type='视频';break;
		case 'bar':type='帖子';break;
		case 'pk':type='视频';break;
		default:type="视频";
	}
	
	if(result.result!=''){
        var resultstring=new StringBuffer();
        for(var i=0;i<result.result.length;i++){
            resultstring.append('<div id="item'+i+'" onmousemove="focusitem('+i+')" onmousedown="searchclick('+i+');searchformsubmit()">');
            resultstring.append('<span id=title'+i+'>');
            resultstring.append(result.result[i].keyword);
            resultstring.append('</span>');
            resultstring.append('<span id=hits'+i+'>');
            resultstring.append(result.result[i].count+"个"+type);
            resultstring.append('</span>');
            resultstring.append('</div>');
        }
        $('search_prompt_list').innerHTML=resultstring.tostring();
        for(var j=0;j<result.result.length;j++){
            setstyle($('item'+j),'d');
            $('item'+j).displayTitleSpan=$('title'+j);
            $('item'+j).displayHitSpan=$('hits'+j);
            setstyle($('title'+j),'t');
            setstyle($('hits'+j),'h');
        }
        showsearch(result.result.length);
        listlength=result.result.length;
        lastindex=-1;
	}else hiddensearch();
}
function ajaxsearch(){
	
	var value=$F('headq').Trim();
	if(value=='')return ;
	/*
	var pattern=/([`~!@#\$\%\^\&\*\(\)\_\+\-\=\{\}\|\[\]\\:\";\'<>\?,\.\/｀～！·＃￥％……—＊（）—＋－＝｛｝｜［］、：“；‘《》？，。／])+$/;
	if((pattern.test(value)))return;
	*/
	var type=$('headSearchType').value;
	
	if(XmlResultBuffer.inBuffer(value+type)){
		showresult( XmlResultBuffer.getBuffer(value+type) ,true);
	}else{
		clearTimeout(RequestDelayHandle);
		RequestDelayHandle=setTimeout("sendRequest()",400);
	}
}
function sendRequest(){
	var value=$F('headq').Trim();
	var type=$('headSearchType').value;
	var url="http://tip.so.youku.com/search_keys?k="+encodeURIComponent(value)+"&type="+type;
	Nova.addScript(url);
}
function initPrompt(e){
	if($F('headq').Trim()==''){
	    hiddensearch();
	}else{
		var keycode=(window.navigator.appName=="Microsoft Internet Explorer")?event.keyCode:e.which;
        if(keycode!=40 && keycode!=38 && keycode!=13)search_prompt_flag=false;
		if($F('headq')!=''&&search_prompt_flag==false)ajaxsearch();
        if(listlength!=0){
            $('headq').onkeydown=searchkeydown;
        }else{
            hiddensearch();
        }
	}
}
/*
function reposition(){
	if(!$('search_prompt_list') || !$('search_prompt_frame') )return;
	if($('search_prompt_list')){
		$('search_prompt_list').style.left=getposition($('headq'),'offsetLeft')+0+"px";
		$('search_prompt_list').style.top =(getposition($('headq'),'offsetTop')+$('headq').clientHeight +1)+"px";	
	}
	if($('search_prompt_frame')){
		$('search_prompt_frame').style.left=getposition($('headq'),'offsetLeft')+1+"px";
		$('search_prompt_frame').style.top =(getposition($('headq'),'offsetTop')+$('headq').clientHeight +3)+"px";
	}
}
*/

var defaultSearchTextValue='';
var useDomain='www.youku.com';//只在www上显示默认词
var searchDomain='so.youku.com';
var headUserClicked=false;
var footUserClicked=false;

window.nova_init_hook_searchinputinit=function(){
	if($("headq")){
		if(location.href.indexOf(useDomain)!=-1){
			Nova.addScript("http://"+searchDomain+"/search_defaultSearchValue");
		}
	}
	
	if($('headq').onfocus!=null){
		var f1=function(e){focusSearchTxt($('headq'));initPrompt(e)}
		$('headq').onfocus=f1;
		var f2=function(){blurSearchTxt($('headq'));hiddensearch()}
		$('headq').onblur=f2;
	}else{
		$('headq').onfocus=initPrompt;
		$('headq').onblur=hiddensearch;
	}
	$('headq').onkeyup=initPrompt;
	createlist();
	//window.onresize=reposition;
	
	
}

//以下是默认显示词回调程序
function initHeadqValue(result){
	var txtArr=result.split("|");
	var pos=parseInt(Math.random()*txtArr.length);
	defaultSearchTextValue=txtArr[pos];
	if(!$("headq").checked && $("headq").value==''){
		$("headq").style.color="#c6c6c6";
		$("headq").value=defaultSearchTextValue;
	}else{
		headUserClicked=true;
	}
	
	if($('headq').onfocus!=null){
		var f1=function(e){focusSearchTxt($('headq'));initPrompt(e)}
		$('headq').onfocus=f1;
		var f2=function(){blurSearchTxt($('headq'));hiddensearch()}
		$('headq').onblur=f2;
	}else{
		$("headq").onfocus=function(){focusSearchTxt($("headq"))};
		$("headq").onblur=function(){blurSearchTxt($("headq"))};
	}
	
	

	initFootqValue();
}
function initFootqValue(){
	if(!$("footq"))return;
	if(!$("footq").checked){
		$("footq").style.color="#c6c6c6";
		$("footq").value=defaultSearchTextValue;
	}else{
		footUserClicked=true;
	}
	$("footq").onfocus=function(){focusSearchTxt($("footq"))};
	$("footq").onblur=function(){blurSearchTxt($("footq"))};
	
}
function focusSearchTxt(objSearchTxt){
	if(location.href.indexOf(useDomain)==-1)return ;
	if(objSearchTxt.defaultValue!='')return;
	if(objSearchTxt.id=='headq'){
		if(!headUserClicked){
			objSearchTxt.style.color="black";
			objSearchTxt.value="";
			headUserClicked=true;
		}
	}else{
		if(!footUserClicked){
			objSearchTxt.style.color="black";
			objSearchTxt.value="";
			footUserClicked=true;
		}
	}
}
function blurSearchTxt(objSearchTxt){
	if(location.href.indexOf(useDomain)==-1)return ;
	if(objSearchTxt.defaultValue!='')return;
	if(objSearchTxt.id=='headq'){
		if(headUserClicked && objSearchTxt.value==''){
			objSearchTxt.style.color="#c6c6c6";
			objSearchTxt.value=defaultSearchTextValue;
			headUserClicked=false;
		}
	}else{
		if(footUserClicked && objSearchTxt.value==''){
			objSearchTxt.style.color="#c6c6c6";
			objSearchTxt.value=defaultSearchTextValue;
			footUserClicked=false;
		}
	}
}