/*
 * 	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: 10000,
            continuous: false,
            numeric: false,
            numericId: 'controls'
        };

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

        this.each(function () {
            var obj = $(this);
            var s = $("li img", obj).length;
            $("#slider li ul").attr("class", "hidden");
            var w = $("li img", obj).width();
            var h = $("li img", 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) {
                obj.children("ul").prepend(obj.children("ul").children("li:last-child").clone().css("margin-left", "-" + w + "px"));
                obj.children("ul").append(obj.children("ul").children("li:nth-child(2)").clone());
                obj.children("ul").css('width', (s + 1) * w);
            };

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

            if (options.controlsShow) {

                //Modified to show first / last no matter what, but make numeric optional
                var html = options.controlsBefore;

                html += '<a id="btnPause" href="javascript:void(0);" class="btnPause"><span class="hidden">Pause</span></a>';

                if (options.firstShow) html += '<span id="' + options.firstId + '"><a href=\"javascript:void(0);\">' + options.firstText + '</a></span>';
                html += ' <span id="' + options.prevId + '"><a href=\"javascript:void(0);\" class="btnBack">' + options.prevText + '</a></span>';

                //Modified to not use an ol, but rather a <span> full of <a>
                if (options.numeric) {
                    html += '<span id="' + options.numericId + '"></span>';
                }

                html += ' <span id="' + options.nextId + '"><a href=\"javascript:void(0);\" class="btnForward">' + 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++) {
                    var a = $(document.createElement("a"));
                    a.attr('id', options.numericId + (i + 1))
                    a.attr('rel', i)
                    a.attr('href', "javascript:void(0);")
                    a.attr('class', 'btnNum')
                    a.html((i + 1))
                    a.appendTo($("#" + options.numericId))
                    a.click(function () {
                        animate($(this).attr('rel'), true);
                    });
                };
            } else {
                $("a", "#" + options.firstId).click(function () {
                    animate("first", true);
                });
                $("a", "#" + options.lastId).click(function () {
                    animate("last", true);
                });
            };

            $("a", "#" + options.nextId).click(function () {
                animate("next", true);
            });
            $("a", "#" + options.prevId).click(function () {
                animate("prev", true);
            });

            var isPaused = false;

            $("#btnPause").click(function () {
                isPaused = !isPaused;
                pause();
            });

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

            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);
            };

            function animate(dir, clicked) {
                if (clickable) {
                    clickable = false;
                    t *= 1;
                    var ot = t;

                    switch (dir) {
                        case "next":
                            t = (ot >= ts) ? (options.continuous ? eval(t + 1) : ts) : eval(t + 1);
                            break;
                        case "prev":
                            t = (t <= 0) ? (options.continuous ? eval(t - 1) : 0) : eval(t - 1);
                            break;
                        case "first":
                            t = 0;
                            break;
                        case "last":
                            t = ts;
                            break;
                        default:
                            t = dir;
                            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();
                        };
                    };
                    t *= 1;
                    var at = Math.max(t + 1, 1);
                    if (at > s) {
                        at = 1;
                    }

                    $("#controls" + at).attr('class', 'btnNum activeSlide');
                    $("#controls" + (ot + 1)).attr('class', 'btnNum');

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

                };

            };
            // init

            var timeout;

            function play() {
                timeout = setTimeout(function () {
                    animate("next", false);
                }, options.pause);
            }

            function pause() {
                clearTimeout(timeout);
            }

            $(this).mouseover(function () { pause(); });
            $(this).mouseout(function () {
                if (!isPaused) {
                    play();
                }
            });

            if (options.auto) {
                play();
            };

            $("#controls1").attr('class', 'btnNum activeSlide');

            if (options.numeric) setCurrent(0);

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

        });

    };
})(jQuery);