/*
    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">&gt;</a>'),
                                $back    = $('<a class="arrow back">&lt;</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 = $("<a href='#' id='start-stop' style='display:none;'></a>").html(base.playing ? base.options.stopText :  base.options.startText);
                        base.$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);