/*
 * 	Easy Slider 1.7 - jQuery plugin
 *	written by Alen Grakalic	
 *	http://cssglobe.com/post/4004/easy-slider-15-the-easiest-jquery-plugin-for-sliding
 *
 *	Copyright (c) 2009 Alen Grakalic (http://cssglobe.com)
 *	Dual licensed under the MIT (MIT-LICENSE.txt)
 *	and GPL (GPL-LICENSE.txt) licenses.
 *
 *	Built for jQuery library
 *	http://jquery.com
 *
 */
 
/*
 *	markup example for $("#slider").easySlider();
 *	
 * 	<div id="slider">
 *		<ul>
 *			<li><img src="images/01.jpg" alt="" /></li>
 *			<li><img src="images/02.jpg" alt="" /></li>
 *			<li><img src="images/03.jpg" alt="" /></li>
 *			<li><img src="images/04.jpg" alt="" /></li>
 *			<li><img src="images/05.jpg" alt="" /></li>
 *		</ul>
 *	</div>
 *
 */

(function($) {

        $.fn.easySlider = function(options) {

            // default configuration properties
            var defaults = {
                prevId: 'prevBtn',
                prevText: 'Previous',
                nextId: 'nextBtn',
                nextText: 'Next',
                controlsShow: true,
                controlsBefore: '',
                controlsAfter: '',
                controlsFade: true,
                firstId: 'firstBtn',
                firstText: 'First',
                firstShow: false,
                lastId: 'lastBtn',
                lastText: 'Last',
                lastShow: false,
                vertical: false,
                speed: 800,
                auto: false,
                pause: 2000,
                continuous: false,
                numeric: false,
                numericId: 'controls',
                numericCssClass: 'controls',
                captionsId: 'captions'
            };

            var options = $.extend(defaults, options);

            this.each(function() {
                var obj = $(this);
                var s = $("li", obj).length;
                var w = $("li", obj).width();
                var h = $("li", obj).height();
                var clickable = true;
                obj.width(w);
                obj.height(h);
                obj.css("overflow", "hidden");
                var ts = s - 1;
                var t = 0;
                $("ul", obj).css('width', s * w);

                if (options.continuous) {
                    $("ul", obj).prepend($("ul li:last-child", obj).clone().css("margin-left", "-" + w + "px"));
                    $("ul", obj).append($("ul li:nth-child(2)", obj).clone());
                    $("ul", obj).css('width', (s + 1) * w);
                };

                if (!options.vertical) $("li", obj).css('float', 'left');

                if (options.controlsShow) {
                    var html = options.controlsBefore;
                    if (options.numeric) {
                        html += '<ol id="' + options.numericId + '" class="' + options.numericCssClass + '"></ol>';
                    }
                    //else 
                    {
                        if (options.firstShow) html += '<span id="' + options.firstId + '"><a href=\"javascript:void(0);\">' + options.firstText + '</a></span>';
                        html += ' <span class="prevBtn" id="' + options.prevId + '"><a href=\"javascript:void(0);\" title=\"' + options.prevText + '\"></a></span>';
                        html += ' <span class="nextBtn" id="' + options.nextId + '"><a href=\"javascript:void(0);\" title=\"' + options.nextText + '\"></a></span>';
                        if (options.lastShow) html += ' <span id="' + options.lastId + '"><a href=\"javascript:void(0);\">' + options.lastText + '</a></span>';
                    };

                    html += options.controlsAfter;
                    $(obj).after(html);
                };

                if (options.numeric) {
                    for (var i = 0; i < s; i++) {
                        $(document.createElement("li"))
						.attr('id', options.numericId + (i + 1))
						.html('<a rel=' + i + ' href=\"javascript:void(0);\">' + (i + 1) + '</a>')
						.appendTo($("#" + options.numericId))
						.click(function() {
                            animate($("a", $(this)).attr('rel'), true);
                        });
                    };
                }
                //else 
                {
                    $("a", "#" + options.nextId).click(function() {
                        animate("next", true);
                    });
                    $("a", "#" + options.prevId).click(function() {
                        animate("prev", true);
                    });
                    $("a", "#" + options.firstId).click(function() {
                        animate("first", true);
                    });
                    $("a", "#" + options.lastId).click(function() {
                        animate("last", true);
                    });
                };

                function setCurrent(i) {
                    i = parseInt(i) + 1;
                    $("li", "#" + options.numericId).removeClass("current");
                    $("li#" + options.numericId + i).addClass("current");
                };
                function setCaption(i) {
                    i = parseInt(i) + 1;
                    $("div", "#" + options.captionsId).removeClass("show");

                    $("div#" + options.captionsId + i).addClass("show");

                };

                function adjust() {
                    if (t > ts) t = 0;
                    if (t < 0) t = ts;
                    if (!options.vertical) {
                        $("ul", obj).css("margin-left", (t * w * -1));
                    } else {
                        $("ul", obj).css("margin-left", (t * h * -1));
                    }
                    clickable = true;
                    if (options.numeric) setCurrent(t);
                    setCaption(t);
                };

                function animate(dir, clicked) {
                    if (clickable) {
                        clickable = false;
                        var ot = t;
                        switch (dir) {
                            case "next":
                                t = (ot >= ts) ? (options.continuous ? (t + 1) : ts) : (t + 1);
                                break;
                            case "prev":
                                t = (t <= 0) ? (options.continuous ? (t - 1) : 0) : (t - 1);
                                break;
                            case "first":
                                t = 0;
                                break;
                            case "last":
                                t = ts;
                                break;
                            default:
                                t = parseInt(dir.toString()); ;
                                break;
                        };
                        var diff = Math.abs(ot - t);
                        var speed = diff * options.speed;
                        if (!options.vertical) {
                            p = (t * w * -1);
                            $("ul", obj).animate(
                            { marginLeft: p },
                            { queue: false, duration: speed, complete: adjust }
						);
                        } else {
                            p = (t * h * -1);
                            $("ul", obj).animate(
                            { marginTop: p },
                            { queue: false, duration: speed, complete: adjust }
						);
                        };

                        if (!options.continuous && options.controlsFade) {
                            if (t == ts) {
                                $("a", "#" + options.nextId).hide();
                                $("a", "#" + options.lastId).hide();
                            } else {
                                $("a", "#" + options.nextId).show();
                                $("a", "#" + options.lastId).show();
                            };
                            if (t == 0) {
                                $("a", "#" + options.prevId).hide();
                                $("a", "#" + options.firstId).hide();
                            } else {
                                $("a", "#" + options.prevId).show();
                                $("a", "#" + options.firstId).show();
                            };
                        };

                        if (clicked) clearTimeout(timeout);
                        if (options.auto && dir == "next" && !clicked) {
                            ;
                            timeout = setTimeout(function() {
                                animate("next", false);
                            }, diff * options.speed + options.pause);
                        };
                    };
                };
                // init
                var timeout;
                if (options.auto) {
                    ;
                    timeout = setTimeout(function() {
                        animate("next", false);
                    }, options.pause);
                };

                if (options.numeric) setCurrent(0);

                setCaption(0);

                if (!options.continuous && options.controlsFade) {
                    $("a", "#" + options.prevId).hide();
                    $("a", "#" + options.firstId).hide();
                };

            });

        };

    })(jQuery);