/*
	SmartSearch Plugin

	Requires <div id="smartsearch"></div> in the page to create the smart search elements
*/
$(document).ready(
	function()
	{
		smartSearchInit();
	}
);

//Initialize the smart search
//Events, bindings, etc
function smartSearchInit()
{		
	$("div#smartsearch").html('<div id="smartseach_form"><select id="smartsearch_type" name="smartsearch_type">'
							+'<option value="all">All</option>'
							+'<option value="member">Member</option>'
							+'<option value="center">Center</option>'
							+'<option value="menu">Menu</option></select>&nbsp;'						
						+'<input type="text" name="txtSmartSearch" id="txtSmartSearch" maxlength="20" /><span class="close"><a href="javascript:void(0);" onclick="smartSearchCancel()">&nbsp;</a></span></div>');

	var isShift = false; 

	//Add keyup/keydown hooks to document
	$(document)
		.keyup(
			function (e) 
			{ 
				if(e.which == 16) isShift = false; 
			}
		)
		.keydown(
			function (e) 
			{ 
				if(e.which == 16) isShift = true; 
				if(e.which == 32 && isShift == true) //space bar
				{ 
					smartSearchFocus();
				} 
			}
	);
		
	//Append a results div (div#smartsearch_results)
	$("div#smartsearch").append("<div id='smartsearch_results'></div>");			
	$("div#smartsearch").hover(function(){},hideSmartSearchResults);			
	//$("body").click(hideSmartSearchResults);
	
	//Add keyup hooks to textbox
	$("input#txtSmartSearch")
		.keydown(
			function(e)
			{
				var val = $.trim($("input#txtSmartSearch").val());
				
				if(e.which == 38) //up
				{
					if(val == "") smartSearchOption("up");
					else smartSearchResults("up");
				}
				else if(e.which == 40) //down
				{
					if(val == "") smartSearchOption("down");
					else smartSearchResults("down");
				}
				else if(e.which == 13)//return 
				{						
					var selLi = $("div#smartsearch_results li.selected").length;
					
					if(selLi > 0) smartSearchSelect("enter");
					else if(e.which == 13) smartSearchProcess(); //only return/enter for searching
				}
				else if(e.which == 32)//space bar
				{						
					var selLi = $("div#smartsearch_results li.selected").length;
					
					if(selLi > 0) smartSearchSelect("space");
					else if(e.which == 13) smartSearchProcess(); //only return/enter for searching
				}
				else if(e.which == 27) //esc, clear text, close results
				{
					smartSearchCancel();
				}						
			})					
		.focus(
			function(e)
			{
				$(this).val("");
				$(this).addClass("smartsearch_focus");
			})
		.blur(
			function(e)
			{
				$(this).removeClass("smartsearch_focus");
			}
	);
}

function smartSearchCancel()
{
	hideSmartSearchResults();
	$("input#txtSmartSearch").blur().val("").focus();
	$("select#smartsearch_type option:eq(0)").attr("selected","selected");
}

function smartSearchFocus()
{
	hideSmartSearchResults();
	$("input#txtSmartSearch").focus();
	$("input#txtSmartSearch").val("");
}

//Go to smartsearch results link
function smartSearchSelect(key)
{
	var link = $("div#smartsearch_results li.selected a").attr("href");
	if(link != "" && link != "javascript:void(0);")
	{
		if(key == "enter") window.location = link;
		else window.open(link, "", "");
	}
	
	$("div#smartsearch_results li.selected a").trigger("click");
}

//Processing the smart search
function smartSearchProcess()
{			
	var input = $.trim($("input#txtSmartSearch").val());
	
	if(input != "") //Perform search
	{	
		//Check is calculation is valid
		var regExp = /^([ 0-9\.]{1,}[\+\-\*\/]{1}){1,}[ 0-9\.]{1,}$/i;
		
		if(regExp.test(input)) //Perform calculation
		{				
			var calcResult = eval(input);
			
			var value = (calcResult == "") 
				? input + " (Invalid calculation)"
				: input + " = " + calcResult;
			
			//$("input#txtSmartSearch").val(value);
			$("div#smartsearch_results").html("<h3>"+value+"</h3>").slideDown();
		}
		else
		{				
			//Send input to ajax
			$("div#smartsearch_results").load("ajax_smartsearch.php?keyword="+encodeURIComponent(input)+"&type="+$("#smartsearch_type").val(),
				function()
				{
					$(this).slideDown();
					//$(this).show();
				}
			);
		}
	}
}

//Scroll through smart search results
function smartSearchResults(direction)
{
	//Get selected index
	var selLi = $("div#smartsearch_results li.selected");
	var selIndex = $("div#smartsearch_results li").index(selLi);
	
	//Get all li
	var li = $("div#smartsearch_results li");
	var liLen = li.length;
	
	if(selIndex >= 0)
	{
		if(direction == "up") //up key, prev option
		{
			selIndex--;
			if(selIndex < 0) selIndex = -1; //Up again on first, select nothing
		}
		else //down, next option
		{
			selIndex++;
			if(selIndex > liLen-1) selIndex = liLen - 1;
		}
	}
	else //If down, select first as default
	{
		if(direction == "down") selIndex = 0;
	}
	
	$("div#smartsearch_results ul li").removeClass("selected");
	$("div#smartsearch_results ul li:eq(" + selIndex + ")").addClass("selected");
}

//Toggle next/prev option
function smartSearchOption(direction)
{
	if($.trim($("input#txtSmartSearch").val()) == "")
	{		
		var el = "select#smartsearch_type";
		
		var len = $(el + " option").length;
		var selIndex = $(el).attr("selectedIndex");
		
		if(direction == "up") //up key, prev option
		{
			selIndex--;
			if(selIndex < 0) selIndex = 0;
		}
		else //down, next option
		{
			selIndex++;
			if(selIndex > len-1) selIndex = len - 1;
		}
		
		$(el).attr("selectedIndex", selIndex);
	}
}

function hideSmartSearchResults()
{
	$("div#smartsearch_results").fadeOut(500,
		function()
		{
			$(this).html("");
		}
	);
}

function smartSearchMember(id)
{
	$("select#smartsearch_type option:eq(1)").attr("selected","selected");
	$("input#txtSmartSearch").val(id);
	smartSearchProcess();
}

function smartSearchCenter(id)
{
	$("select#smartsearch_type option:eq(2)").attr("selected","selected");
	$("input#txtSmartSearch").val(id);
	smartSearchProcess();
}

function smartSearchNewWin(url)
{
	window.open(url, "", "");
	return false;
}

//Enable LI mouseovers
function smartSearchInitLi()
{
	$("div#smartsearch_results ul li").hover(
		function()
		{
			$("div#smartsearch_results ul li").removeClass("selected");
			$(this).addClass("selected");
		},
		function()
		{
			$(this).removeClass("selected");		
		}
	);
}