/**
 * --------------------------------------------------------------------
 * jQuery-Plugin "Image Cross-Fader"
 * http://code.google.com/p/jquery-imagecrossfader/
 * Version: 1.2.0, 2009-08-27
 * by Christophe DELIENS (G2F - GET2FUTURE)
 * 
 * http://twitter.com/cdeliens
 * chris[at]g2f[dot]be
 *
 * Copyright (c) 2009 Christophe DELIENS
 * Licensed under the MIT Licence (http://www.opensource.org/licenses/mit-license.php)
 *
 * --------------------------------------------------------------------
 * Modified by Paul Baxter 11/07/2011
 * Change: Immediately show first image on page load, rather than
 * fading in. No other changes.
 * --------------------------------------------------------------------
 */
(function ($) {
    // TODO: defining "global" variables prevents this plugin from being usable with multiple instances
    var timerId = null;
    var imageItems = Array();
    var nextIndex = 0;
    var mouseOnContainer = false;
    var settings = null;
    var $me = null;

    $.fn.imageCrossFader = function (options) {
        settings = $.extend($.fn.imageCrossFader.defaults, options);

        return this.each(function () {
            $me = $(this);

            // finding items
            var items = $me.find('ul li');
            var itemsCount = items.size();
            imageItems = Array(itemsCount);

            // we have our items, emptying the container
            $me.empty().show();

            // binding mouse events
            if (settings.pauseOnHover) {
                $me.mouseenter(function () {
                    mouseOnContainer = true;
                    deleteTimer();
                }).mouseleave(function () {
                    mouseOnContainer = false;
                    createTimer();
                });
            }

            if (settings.index) {
                // building items index container
                var itemsIndex = $('<div></div>').attr('class', 'index').appendTo($me);
            }

            for (i = 0; i < itemsCount; ++i) {
                // building imageCrossFader array
                var itemHtml = $(items[i]).html();
                imageItems[i] = itemHtml;

                if (settings.index) {
                    // adding new index for current item
                    $('<p></p>').text(i + 1).attr('rel', i).click(function () {
                        showItem(parseInt($(this).attr('rel')));
                        return false;
                    }).appendTo($(itemsIndex));
                }
            }

            // initiating imageCrossFader with first item
            showItem(0, true); // added ', true' PB 11/07/2011
        });
    };

    $.fn.imageCrossFader.defaults = {
        fadeIn: 600,
        fadeOut: 200,
        delay: 3000,
        pauseOnHover: true,
        index: true
    };

    function showItem(index, firstrun) {
        // clearing current running timer
        deleteTimer();

        if (settings.index) {
            // "selecting" current item index
            $me.find('div.index p').removeClass('selected');
            $me.find('div.index p[rel=' + index + ']').addClass('selected');
        }

        // crossfading in new item
        if (!firstrun) { // added 'if (!firstrun) {}' around current code PB 11/07/2011
            $me.find('div.item').fadeOut(settings.fadeOut, function () {
                $(this).remove();
            });
            $('<div></div>').attr('class', 'item').append(imageItems[index]).appendTo($me).fadeIn(settings.fadeIn);
        }

        if (firstrun) { // added 'if (!firstrun) { *** }' added this entire 'if' block PB 11/07/2011
            $('<div></div>').attr('class', 'item').append(imageItems[index]).appendTo($me).show();
        }

        // executing title function / displaying title from image "alt" attribute
        if (settings.title) {
            var imageLink = null;
            var imageObject = $(imageItems[index]);
            if (!imageObject.is('img')) {
                if (imageObject.is('a')) {
                    imageLink = imageObject.attr('href');
                } else {
                    if (imageObject.find('a')) {
                        imageLink = imageObject.find('a').attr('href');
                    }
                }
                imageObject = imageObject.find('img');
            }
            var imageTitle = imageObject.attr('alt');

            switch (typeof (settings.title)) {
                case 'function':  // custom user function
                    settings.title(imageTitle, imageLink);
                    break;

                case 'object':  // jquery object
                    settings.title.text(imageTitle);
                    break;
            }
        }

        // next index math
        nextIndex = index + 1;
        if (nextIndex >= imageItems.length) {
            nextIndex = 0;
        }

        if (!mouseOnContainer) {
            createTimer();
        }
    }

    function createTimer() {
        // setting timer for next item display
        timerId = window.setTimeout(function () {
            showItem(nextIndex, false); // added ', false' PB 11/07/2011
        }, settings.delay);
    }

    function deleteTimer() {
        if (timerId != null) {
            window.clearTimeout(timerId);
        }
    }
})(jQuery);