/*
    anythingSlider v1.2
    
    By Chris Coyier: http://css-tricks.com
    with major improvements by Doug Neiner: http://pixelgraphics.us/
    based on work by Remy Sharp: http://jqueryfordesigners.com/


	To use the navigationFormatter function, you must have a function that
	accepts two paramaters, and returns a string of HTML text.
	
	index = integer index (1 based);
	panel = jQuery wrapped LI item this tab references
	@return = Must return a string of HTML/Text
	
	navigationFormatter: function(index, panel){
		return index + " Panel"; // This would have each tab with the text 'X Panel' where X = index
	}
*/

(function($) {

    $.anythingSlider = function(el, options) {
	// To avoid scope issues, use 'base' instead of 'this'
	// to reference this class from internal events and functions.
	var base = this;

	// Access to jQuery and DOM versions of element
	base.$el = $(el);
	base.el = el;

	// Set up a few defaults
	base.currentPage = 1;
	base.timer = null;
	base.playing = false;

	// Add a reverse reference to the DOM object
	base.$el.data("AnythingSlider", base);

	base.init = function() {
	    base.options = $.extend({},
	    $.anythingSlider.defaults, options);

	    // Cache existing DOM elements for later 
	    base.$wrapper = base.$el.find('> div').css('overflow', 'hidden');
	    base.$slider = base.$wrapper.find('> ul');
	    base.$items = base.$slider.find('> li');
	    base.$single = base.$items.filter(':first');

	    // Build the navigation if needed
	    if (base.options.buildNavigation) base.buildNavigation();

	    // Get the details
	    base.singleWidth = base.$single.outerWidth();
	    base.pages = base.$items.length;

	    // Top and tail the list with 'visible' number of items, top has the last section, and tail has the first
	    // This supports the "infinite" scrolling
	    base.$items.filter(':first').before(base.$items.filter(':last').clone().addClass('cloned'));
	    base.$items.filter(':last').after(base.$items.filter(':first').clone().addClass('cloned'));

	    // We just added two items, time to re-cache the list
	    base.$items = base.$slider.find('> li'); // reselect
	    // Setup our forward/backward navigation
	    base.buildNextBackButtons();

	    // If autoPlay functionality is included, then initialize the settings
	    if (base.options.autoPlay) {
		base.playing = !base.options.startStopped; // Sets the playing variable to false if startStopped is true
		base.buildAutoPlay();
	    };

	    // If pauseOnHover then add hover effects
	    if (base.options.pauseOnHover) {
		base.$el.hover(function() {
		    base.clearTimer();
		},
		function() {
		    base.startStop(base.playing);
		});
	    }

	    // If a hash can not be used to trigger the plugin, then go to page 1
	    if ((base.options.hashTags == true && !base.gotoHash()) || base.options.hashTags == false) {
		base.setCurrentPage(1);
	    };
	};

	base.gotoPage = function(page, autoplay) {
	    // When autoplay isn't passed, we stop the timer
	    if (autoplay !== true) autoplay = false;
	    if (!autoplay) base.startStop(false);

	    if (typeof(page) == "undefined" || page == null) {
		page = 1;
		base.setCurrentPage(1);
	    };

	    // Just check for bounds
	    if (page > base.pages + 1) page = base.pages;
	    if (page < 0) page = 1;

	    var dir = page < base.currentPage ? -1 : 1,
	    n = Math.abs(base.currentPage - page),
	    left = base.singleWidth * dir * n;

	    base.$wrapper.filter(':not(:animated)').animate({
		scrollLeft: '+=' + left
	    },
	    base.options.animationTime, base.options.easing,
	    function() {
		if (page == 0) {
		    base.$wrapper.scrollLeft(base.singleWidth * base.pages);
		    page = base.pages;
		} else if (page > base.pages) {
		    base.$wrapper.scrollLeft(base.singleWidth);
		    // reset back to start position
		    page = 1;
		};
		base.setCurrentPage(page);

	    });
	};

	base.setCurrentPage = function(page, move) {
	    // Set visual
	    if (base.options.buildNavigation) {
		base.$nav.find('.cur').removeClass('cur');
		$(base.$navLinks[page - 1]).addClass('cur');
	    };

	    // Only change left if move does not equal false
	    if (move !== false) base.$wrapper.scrollLeft(base.singleWidth * page);

	    // Update local variable
	    base.currentPage = page;
	};

	base.goForward = function(autoplay) {
	    if (autoplay !== true) autoplay = false;
	    base.gotoPage(base.currentPage + 1, autoplay);
	};

	base.goBack = function() {
	    base.gotoPage(base.currentPage - 1);
	};

	// This method tries to find a hash that matches panel-X
	// If found, it tries to find a matching item
	// If that is found as well, then that item starts visible
	base.gotoHash = function() {
	    if (/^#?panel-\d+$/.test(window.location.hash)) {
		var index = parseInt(window.location.hash.substr(7));
		var $item = base.$items.filter(':eq(' + index + ')');
		if ($item.length != 0) {
		    base.setCurrentPage(index);
		    return true;
		};
	    };
	    return false; // A item wasn't found;
	};

	// Creates the numbered navigation links
	base.buildNavigation = function() {
	    base.$nav = $("<div id='thumbNav'></div>").appendTo(base.$el);
	    base.$items.each(function(i, el) {
		var index = i + 1;
		var $a = $("<a href='#'></a>");

		// If a formatter function is present, use it
		if (typeof(base.options.navigationFormatter) == "function") {
		    $a.html(base.options.navigationFormatter(index, $(this)));
		} else {
		    $a.text(index);
		}
		$a.click(function(e) {
		    base.gotoPage(index);

		    if (base.options.hashTags) base.setHash('panel-' + index);

		    e.preventDefault();
		});
		base.$nav.append($a);
	    });
	    base.$navLinks = base.$nav.find('> a');
	};

	// Creates the Forward/Backward buttons
	base.buildNextBackButtons = function() {
	    var $forward = $('<a class="arrow forward"></a>'),
	    $back = $('<a class="arrow back"></a>');

	    // Bind to the forward and back buttons
	    $back.click(function(e) {
		base.goBack();
		e.preventDefault();
	    });

	    $forward.click(function(e) {
		base.goForward();
		e.preventDefault();
	    });

	    // Append elements to page
	    base.$wrapper.after($back).after($forward);
	};

	// Creates the Start/Stop button
	base.buildAutoPlay = function() {

	    base.$startStop = $("<a href='#' id='start-stop'></a>").html(base.playing ? base.options.stopText: base.options.startText);
	    base.$el.append(base.$startStop);
	    base.$startStop.click(function(e) {
		base.startStop(!base.playing);
		e.preventDefault();
	    });

	    // Use the same setting, but trigger the start;
	    base.startStop(base.playing);
	};

	// Handles stopping and playing the slideshow
	// Pass startStop(false) to stop and startStop(true) to play
	base.startStop = function(playing) {
	    if (playing !== true) playing = false; // Default if not supplied is false
	    // Update variable
	    base.playing = playing;

	    // Toggle playing and text
	    if (base.options.autoPlay) base.$startStop.toggleClass("playing", playing).html(playing ? base.options.stopText: base.options.startText);

	    if (playing) {
		base.clearTimer(); // Just in case this was triggered twice in a row
		base.timer = window.setInterval(function() {
		    base.goForward(true);
		},
		base.options.delay);
	    } else {
		base.clearTimer();
	    };
	};

	base.clearTimer = function() {
	    // Clear the timer only if it is set
	    if (base.timer) window.clearInterval(base.timer);
	};

	// Taken from AJAXY jquery.history Plugin
	base.setHash = function(hash) {
	    // Write hash
	    if (typeof window.location.hash !== 'undefined') {
		if (window.location.hash !== hash) {
		    window.location.hash = hash;
		};
	    } else if (location.hash !== hash) {
		location.hash = hash;
	    };

	    // Done
	    return hash;
	};
	// <-- End AJAXY code

	// Trigger the initialization
	base.init();
    };

    $.anythingSlider.defaults = {
	easing: "swing",
	// Anything other than "linear" or "swing" requires the easing plugin
	autoPlay: true,
	// This turns off the entire FUNCTIONALY, not just if it starts running or not
	startStopped: false,
	// If autoPlay is on, this can force it to start stopped
	delay: 3000,
	// How long between slide transitions in AutoPlay mode
	animationTime: 600,
	// How long the slide transition takes
	hashTags: true,
	// Should links change the hashtag in the URL?
	buildNavigation: true,
	// If true, builds and list of anchor links to link to each slide
	pauseOnHover: true,
	// If true, and autoPlay is enabled, the show will pause on hover
	startText: "Start",
	// Start text
	stopText: "Stop",
	// Stop text
	navigationFormatter: null // Details at the top of the file on this use (advanced use)
    };

    $.fn.anythingSlider = function(options) {
	if (typeof(options) == "object") {
	    return this.each(function(i) { (new $.anythingSlider(this, options));

		// This plugin supports multiple instances, but only one can support hash-tag support
		// This disables hash-tags on all items but the first one
		options.hashTags = false;
	    });
	} else if (typeof(options) == "number") {

	    return this.each(function(i) {
		var anySlide = $(this).data('AnythingSlider');
		if (anySlide) {
		    anySlide.gotoPage(options);
		}
	    });
	}
    };

})(jQuery);