var itemsContainer;
var itemCount;
var totalPageCount;
var paginatorContainer;
var pageInput;
var nextBtn;
var previousBtn;
var viewAllBtn;
var itemsPerPage;
var currentPageNum = 1;
var currentItemRangeDsp;
var pageURL;
var viewAllSet = false;

function initPagination(itemsContainerId, paginatorContainerId, options){
	itemsContainer = $("#" + itemsContainerId);
	paginatorContainer = $("#" + paginatorContainerId);
	itemCount = itemsContainer.children('[pageItem="true"]').length;
	
	if(options !== null){
		if(options["pageInput"] != null){
			pageInput = paginatorContainer.find('.'+options.pageInput+'');
			pageInput.bind('keyup', function(event){pageInput_keyup(event);});
		}
		if(options["nextBtn"] != null)
		{
			nextBtn = paginatorContainer.children('.'+options.nextBtn+'');
			nextBtn.unbind();
			nextBtn.click(nextBtn_click);
		}
		if(options["previousBtn"] != null)
		{
			previousBtn = paginatorContainer.children('.'+options.previousBtn+'');
			previousBtn.unbind();
			previousBtn.click(previousBtn_click);
		}
		if(options["firstBtn"] != null)
		{
			previousBtn.unbind();
			previousBtn.click(firstBtn_click);
		}
		if(options["lastBtn"] != null)
		{
			previousBtn.unbind();
			previousBtn.click(lastBtn_click);
		}
		if(options["itemsPerPage"] != null)
		{
			itemsPerPage = options.itemsPerPage;
			totalPageCount = Math.ceil(itemCount / itemsPerPage);
			paginatorContainer.children('.text').children('.pageCountTotal').html(totalPageCount);
		}else{
			itemsPerPage = 5;	
		}
		
		if(options["viewAllBtn"] != null)
		{
			viewAllBtn = paginatorContainer.find('.viewAll').find('.'+options.viewAllBtn+'');
			viewAllBtn.unbind();
			viewAllBtn.click(viewAllBtn_click);
			
		}
		if(options["currentItemRangeDisplay"] != null)
		{
			currentItemRangeDsp = $("#" + options.currentItemRangeDisplay);
			currentItemRangeDsp.children('.total').html(itemCount);
		}
		else{
			currentItemRangeDsp = null;	
		}
		if(options["pageURL"] != null)
		{
			pageURL = false;	
		}
		else if(options["pageURL"] == true){
			pageURL = true;	
		}
		
	}
	else
	{
		itemsContainer, pageInput, nextBtn, previousBtn, itemsPerPage = null;
	}
	
	if(pageURL){
		//if there is no page in the hash, just go to page 1
		if(window.location.hash == '' || window.location.hash == '#')
			setPage(1);
		else{
			var hash = window.location.hash;
			hash = hash.substring(1);
			hash = parseInt(hash.substring(4));
			if(hash == null || isNaN(hash))
				setPage(1);
			else
				setPage(hash);
		}
	}
	else{
		setPage(1);	
	}
	
	if(totalPageCount == 0 || totalPageCount == 1){
		paginatorContainer.css('display', 'none');
	}	
	
}


/*
 * EVENT HANDLERS
 */
var inputTimerCount = 0;
var inputTimer;

function pageInput_keyup(e){
	
	//DO CHECKS FOR INT FIRST	
	var input = parseInt(pageInput.val());
	if(pageInput.val() == ''){
		inputTimer = setTimeout(function(){setPage(1);}, 2500);
	}
	else{
		if(isNaN(input) && input.toString() !== ''){
			setPage(1); 
			alert('Please enter numbers only.');
		}
		else{
			if(input > totalPageCount)
				input = totalPageCount
			setPage(input);
		}
	}
	/*clearTimeout(inputTimer);
	inputTimer = setTimeout(function(){increasePagInputVal()}, 600);*/
}

function increasePagInputVal(){
	/*if(inputTimerCount != 2){
		inputTimerCount += 1;
	}else{
		clearTimeout(inputTimer);
		checkPagInputVal();
	}*/
}

function checkPagInputVal(){
	inputTimerCount = 0;
	clearTimeout(inputTimer);
	//DO CHECKS FOR INT FIRST
	var input = parseInt($("input[class='currentPageNumberInput']").val());
	if(isNaN(input) && input.toString() !== ''){
		setPage(1); alert('Please enter numbers only.');
	}
	else{
		setPage(input);
	}
}

function nextBtn_click(){
	setPage(currentPageNum + 1);
}
function previousBtn_click(){
	setPage(currentPageNum - 1);	
}
function firstBtn_click(){
	setPage(1);	
}
function lastBtn_click(){
	setPage(totalPageCount);	
}
function viewAllBtn_click(){
	if(itemsContainer.children('tr[pageItem="true"]').length >0)
		itemsContainer.children('tr[pageItem="true"]').removeClass('hide');
	else
		itemsContainer.children('[pageItem="true"]').addClass('visible');
	
	itemsContainer.children('[pageItem="true"]').addClass('all');
	pageInput.val(1)
	if(currentItemRangeDsp !== null){
		updateItemRangeDisplay(1, itemCount);
	}
	paginatorContainer.css('display', 'none');
	viewAllSet = true;
}


/*
 * FUNCTIONS
 */
function setPage(inputNum){
	currentPageNum = inputNum;
	//stay on page 1 if you try to decrement page lower than 1
	if(currentPageNum < 1){
		currentPageNum = 1;
		pageInput.val(1);
	}
	//stay on last page if you try to increment page lower than the total
	else if(currentPageNum >= totalPageCount){
		currentPageNum = totalPageCount;
		pageInput.val(totalPageCount);
	}
	else{
		pageInput.val(currentPageNum);	
	}
	if(pageURL){
		window.location.hash = 'page'+currentPageNum;
	}
	
	goToPage(currentPageNum);
	clearTimeout(inputTimer);
}

//display the items for the page
function goToPage(pageNum){
	startingItemIndex = (pageNum * itemsPerPage) - itemsPerPage;
	
	//check if it's a table row...to apply a ie7 fix
	if(itemsContainer.children('tr[pageItem="true"]').length >0){
		itemsContainer.children('tr[pageItem="true"]').addClass('hide');
	}
	else
		itemsContainer.children('[pageItem="true"]').removeClass('visible');
	
	for(var i=0; i<itemsPerPage; i++){
		//check if it's a table row...to apply a ie7 fix
		if(itemsContainer.children('tr[pageItem="true"]').length >0){
			//console.log(startingItemIndex  + i);
			itemsContainer.children('tr[pageItem="true"]:eq('+ (startingItemIndex  + i) +')').removeClass('hide');
		}
		else
			itemsContainer.children('[pageItem="true"]:eq('+ (startingItemIndex  + i) +')').addClass('visible');
	}
	
	//if the item display
	if(currentItemRangeDsp !== null){
		if(startingItemIndex < 0)
			startingItemIndex = -1;
		updateItemRangeDisplay(startingItemIndex+1, startingItemIndex+itemsPerPage);	
	}
}

function searchFilter(searchVal){
	pageCountTotal_Last.html("1");
	pageInput.val(1);
	itemsContainer.children('[pageItem="true"]').removeClass('visible');
	
	itemsContainer.children('[handle*="' + searchVal.toLowerCase() + '"]').addClass("visible");
	itemsContainer.children('[displayName*="' + searchVal.toLowerCase() + '"]').addClass("visible");
}

//we update the 3 - 6 range here
function updateItemRangeDisplay(startNum, endNum){
	//currentItemRangeDsp.hide();
	currentItemRangeDsp.children('.first').html(startNum);
	if(endNum > itemCount){
		currentItemRangeDsp.children('.last').html(itemCount);
	}
	else if(endNum < itemsPerPage){
		currentItemRangeDsp.children('.last').html(itemCount);	
	}
	else{
		currentItemRangeDsp.children('.last').html(endNum);	
	}
}

function recountPagination(){
	itemCount = itemsContainer.children('[pageItem="true"]').length;
	totalPageCount = Math.ceil(itemCount / itemsPerPage);
	paginatorContainer.children('.text').children('.pageCountTotal').html(totalPageCount);	
	setPage(1);
	if(totalPageCount == 0 || totalPageCount == 1){
		paginatorContainer.css('display', 'none');
	}	
}