//This is a AJAX pager that uses jQuery
//should be altered to support templating.

function StarmindPager(navTopSelector, navBottomSelector, pagerContainerSelector, pagerItemSelector, pSize, nPC) {
	this.CurrentPage = 1;
	this.PageSize = pSize;
	this.NavigationPageCount = nPC;
	this.NavTopSelector = navTopSelector;
	this.NavBottomSelector = navBottomSelector;
	this.PagerContainerSelector = pagerContainerSelector;
	this.PagerItemWildcardSelector = pagerItemSelector;
	this.PagerShowingRangeCallback = null;
	
	this.RefreshContext();
	this.TogglePage(1);
}

StarmindPager.prototype.RefreshContext = function() {
	this.NavTop = jQuery(this.NavTopSelector);
	this.NavBottom = jQuery(this.NavBottomSelector);
	this.PagerContainer = jQuery(this.PagerContainerSelector);
	this.PagerItems = this.PagerContainer.find(this.PagerItemWildcardSelector);
}

StarmindPager.prototype.BuildNavigation = function() {
	if(this.NavTop.size() > 0) this.BuildNavigationFor(this.NavTop);
	if(this.NavBottom.size() > 0) this.BuildNavigationFor(this.NavBottom);
}

StarmindPager.prototype.BuildNavigationFor = function(navContainer) {
	navContainer.children().remove();
	
	var table = jQuery("<table style=\"width: 100%;\"><tr><td></td><td style=\"text-align: center;\"></td><td style=\"text-align: right;\"></td></tr></table>");
	var cells = table.find("td");

	/*var first = jQuery("<a />", { href: "#", text: "<< First" });*/
	/*var last = jQuery("<a />", { href: "#", text: "Last >>" });*/
	var prev = jQuery("<a />", { href: "#", text: "<" });
	var next = jQuery("<a />", { href: "#", text: ">" });
	
	var prevImg = jQuery("<img />", { src : PaginationImages.PREV, alt: "Previous", style: "margin-bottom: 1px; cursor: pointer;" });
	var nextImg = jQuery("<img />", { src : PaginationImages.NEXT, alt: "Next", style: "margin-bottom: 1px; cursor: pointer;" });
	
	var pageImg = jQuery("<img />", { src : PaginationImages.PAGE, alt: "Page" });
	var ofImg = jQuery("<img />", { src : PaginationImages.OF, alt: "Of" });
	
	//first.bind("click", this, function(e) { e.data.TogglePage(1); return false; });
	//last.bind("click", this, function(e) { e.data.TogglePage(-1); return false; });
	prevImg.bind("click", this, function(e) { e.data.TogglePage(e.data.GetCurrentPageMod(-1)); return false; });
	nextImg.bind("click", this, function(e) { e.data.TogglePage(e.data.GetCurrentPageMod(1)); return false; });
	
	//cells.eq(0).append(first);
	//cells.eq(0).append("  ");
	cells.eq(2).append(prevImg);
	cells.eq(2).append("&nbsp;");
	cells.eq(2).append(pageImg);
	cells.eq(2).append("&nbsp;");
	cells.eq(2).append('<img src="' + NumberImages[this.CurrentPage] + '" alt="Current page" />');
	cells.eq(2).append("&nbsp;");
	cells.eq(2).append(ofImg);
	cells.eq(2).append("&nbsp;");
	cells.eq(2).append('<img src="' + NumberImages[this.GetLastPageNumber()] + '" alt="Total number page" />');
	cells.eq(2).append("&nbsp;");
	cells.eq(2).append(nextImg);
	
	var min = (
		this.CurrentPage - Math.floor(this.NavigationPageCount / 2) > 0 ? 
			(this.CurrentPage + Math.floor(this.NavigationPageCount / 2) <= this.GetLastPageNumber() ? 
				this.CurrentPage - Math.floor(this.NavigationPageCount / 2) : 
				this.CurrentPage - Math.floor(this.NavigationPageCount / 2) - ((this.CurrentPage + Math.floor(this.NavigationPageCount / 2) - this.GetLastPageNumber()))
			) :
			1
	);
	var max = (min + this.NavigationPageCount - 1 <= this.GetLastPageNumber() ? min + this.NavigationPageCount - 1 : this.GetLastPageNumber());
	
	
	for(var pageNumber = min; pageNumber <= max; pageNumber++) {
		var pageLink = jQuery((pageNumber == this.CurrentPage ? "<b />" : "<a />"), { href: "#", text: pageNumber });
		pageLink.bind("click", { obj: this, pageNumber: pageNumber }, function(e) { e.data.obj.TogglePage(e.data.pageNumber); return false; });
		
		/*
		if(pageNumber == min && pageNumber != 1) cells.eq(2).append("... ")
		cells.eq(2).append(pageLink);
		if(pageNumber < max) cells.eq(2).append(", ");
		if(pageNumber == max && pageNumber != this.GetLastPageNumber()) cells.eq(2).append(" ...")
		*/
		
	}
	
	
	
	navContainer.append(table);
}

StarmindPager.prototype.TogglePage = function(pageNumber) {
	if(pageNumber == -1) pageNumber = this.GetLastPageNumber();

	if(pageNumber > 0 && pageNumber <= this.GetLastPageNumber()) {
		this.CurrentPage = pageNumber;
		this.BuildNavigation();
		
		var min = (this.CurrentPage - 1) * this.PageSize;
		var max = this.CurrentPage * this.PageSize;
		
		this.GetItems().hide().filter(function(i) { return (i >= min && i < max); }).show();
		
		if(this.PagerShowingRangeCallback != null) this.PagerShowingRangeCallback(min+1, (this.GetItemCount() < max ? this.GetItemCount() : max));
	}
}

StarmindPager.prototype.ShowAll = function() {
	this.GetItems().show();
}

StarmindPager.prototype.GetCurrentPageMod = function(mod) {
	var pageNumber = this.CurrentPage + mod;
	return (pageNumber > 0 ? (pageNumber <= this.GetLastPageNumber() ? pageNumber : this.GetLastPageNumber()) : 1);
}

StarmindPager.prototype.GetLastPageNumber = function() {
	return Math.ceil(this.GetItemCount()/this.PageSize);
}

StarmindPager.prototype.GetItemCount = function() {
	return this.GetItems().length;
}

StarmindPager.prototype.GetItems = function() {
	return this.PagerItems;
}