var
	intro = null
,	introTimer = null
,	introAuto = true
,	introPos = 0
,	introItems = 8
,	introSlideInTime = 1500
,	introSlideOutTime = 1000
,	introItemTime = 7000
,	introRulerStep = Math.round(775 / introItems)
,	introNavH = 0
,	introContentH = 0
,	introW = 0
;


function introStop() { if (introTimer) { clearTimeout(introTimer); introTimer = null; } }


function introPause(dir)
{
	introStop();
	introAuto = !introAuto;
	if (introAuto)
		introPlay();
}


function introPlay() { introStop(); introTimer = setTimeout("introChange()", introItemTime); }


function introChange(dir, manual)
{
	if (!dir)
		dir = 1;

	if (manual)
		introStop();

	var next = intro.find("> .content.current").stop(true).animate({ left: (-dir * introW) + "px" }, introSlideOutTime).removeClass("current");
	next = (dir < 0) ? next.prev(".content") : next.next(".content");
	if (!next.length)
	{
		next = (dir < 0) ? intro.find("> .content:last") : intro.find("> .content:first");
		introPos = (dir < 0) ? introItems - 1 : 0;
	}
	else
		introPos += dir;

	var ruler = intro.find(".ruler > a");
	ruler.stop(true).animate({ left: (introPos * introRulerStep) + "px"}, introSlideInTime);
	if (!next.is(":animated"))
		next.css("left", (dir * introW) + "px");
	next.addClass("current").show().stop(true).animate({ left: "0px" }, introSlideInTime);
	ruler.find("span").text(next.find(".info > span").text());
	if (introAuto)
		introPlay();
}


function introChangeTo(item)
{
	var current = intro.find("> .content.current");
	dir = (item > introPos) ? 1 : -1;
	if (introPos != item)
		current.stop(true).animate({ left: (-dir * introW) + "px" }, introSlideOutTime).removeClass("current");
	next = intro.find("> .content:eq(" + item + ")");
	var ruler = intro.find("> .ruler > a");
	ruler.stop(true).animate({ left: (item * introRulerStep) + "px"}, introSlideInTime);
	if (introPos != item)
		next.addClass("current").css("left", (dir * introW) + "px").show().stop(true).animate({ left: "0px" }, introSlideInTime);
	ruler.find("span").text(next.find(".info > span").text());
	introPos = item;
}


var tooltip = null;


function tooltipShow(element, text)
{
	tooltip.find("span").text(text);

	var IEOffset = { left: 0 };
	if ($.browser.msie)
		IEOffset = $("body").offset();
	var offset = element.offset();

	tooltip.css({ left: (offset.left + element.width() - IEOffset.left - 10) + "px", top: (offset.top + (element.outerHeight() - tooltip.outerHeight()) / 2) + "px" }).show();
}


var tooltipAlt = null;


function tooltipAltShow(element, text)
{
	var i = text.indexOf(":");
	tooltipAlt.find("span").empty().append("<strong>" + text.substring(0, i + 1) + "</strong> " + text.substring(i + 1));

	var IEOffset = { left: 0 };
	if ($.browser.msie)
		IEOffset = $("body").offset();
	var offset = element.offset();

	tooltipAlt.css({ left: (offset.left + element.width() - IEOffset.left) + "px", top: (offset.top + (element.outerHeight() - tooltipAlt.outerHeight()) / 2) + "px" }).show();
}


/*
** intro stuff
*/
intro = $(".intro");
if (intro.length)
{
	$.getJSON($("body").hasClass("pl") ? "data/intro_pl.js" : "data/intro.js", function(json)
	{
		intro.addClass("intro-scripted");
		var introNav = intro.find("> .navigation > ul");

		// data loaded from JSON, now inject it to the HTML
		for (var i = 0; i < introItems; i++)
		{
			var item = intro.find("> .content:first").clone().insertBefore(intro.find("> .ruler"));
			item.find("> .photo img").attr("src", "data/intro/" + i + json.items[i].ext).attr("alt", json.items[i].info);
			item.find("> h2").html(json.items[i].title);
			var info = item.find("> .info");
			info.find("> span").html("<a href='" + json.items[i].visit + "'>" + json.items[i].info + "</a>");
			info.find("> a").attr("href", json.items[i].visit);
			info.find("~ p").remove();
			for (t in json.items[i].text)
				item.append("<p>" + json.items[i].text[t] + "</p>");
		}
		intro.find("> .content:first").remove();

		// make navigation work
		introNav.find("> li:first").after("<li><a class=\"pause\" href=\"#\">|| / [&gt;</a></li>");
		introNavH = -introNav.outerHeight() - intro.find("> .navigation > p").outerHeight();
		introNav.css("margin-top", introNavH + "px").hide();
		intro.find("> .navigation")
			.bind("mouseenter", function() { introNav.show().stop(true).animate({ marginTop: "0px" }, 350, "swing"); })
			.bind("mouseleave", function() { introNav.stop(true).animate({ marginTop: introNavH + "px" }, 150, "swing", function() { $(this).hide(); }); });

		// content sliding
		introContentH = 0;
		introW = intro.find("> .content:first").addClass("current").outerWidth();
		intro.find("> .content").each(function() { introContentH = Math.max($(this).outerHeight(), introContentH); }).not(":first").hide();
		intro.height(introContentH + 30);

		intro.append("<div class=\"fade-left\"></div><div class=\"fade-right\"></div>");
		intro.find("> .fade-left, > .fade-right").height(intro.find("> .content").outerHeight());

		// handle clicking on previous and next buttons
		intro.find("> .navigation a.previous").click(function() { introChange(-1, true); return false; });
		intro.find("> .navigation a.next").click(function() { introChange(1, true); return false; });
		intro.find("> .navigation a.pause").click(function() { $(this).toggleClass("play"); introPause(); return false; });

		intro.find("> .ruler").css("padding-top", (introContentH + 10) + "px").find("a").css("left", (introPos * introRulerStep) + "px")
			.bind("dragstart dragend", function()
			{
				$(this).stop(true).toggleClass("drag");
				introStop();
			})
			.bind("drag", function(event)
			{
				var offset = $(this).parent().offset();
				var max_x = (introItems - 1) * introRulerStep;
				var x = Math.min(max_x, Math.max(0, event.offsetX - offset.left - 34));
				$(this).css("left", x + "px");
				x = Math.round(x / introRulerStep);
				$(this).find("span").text(intro.find("> .content:eq(" + x + ") .info > span:first").text());
			})
			.bind("dragend", function(event)
			{
				var offset = $(this).parent().offset();
				var max_x = (introItems - 1) * introRulerStep;
				var x = Math.round(Math.min(max_x, Math.max(0, event.offsetX - offset.left - 34)) / introRulerStep);
				introChangeTo(x);
				if (introAuto)
					setTimeout("introPlay()", introSlideInTime + 1000);
			});

		introPlay();

		if ($.browser.msie && $.browser.version < 7)
			intro.find("> .ruler > a").attr("href", "#").click(function() { return false; });
	});
}