/*
 * 	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 jQuery("#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>
 *
 */


/* 
* July 12, 2010  - Chris S.
*
* Modified to add a pause button, to not stop animation when next is clicked
* Fixed a select error when binding the click events to the next/prev buttons
* Added a property and method for a counter display, ex. "1 of 4"
*/

(function(jQuery) {

    jQuery.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',
            pauseId: 'pauseBtn',
            counterId: 'slideCount',
            lastShow: false,
            vertical: false,
            speed: 800,
            auto: false,
            pause: 2000,
            continuous: false,
            numeric: false,
            numericId: 'controls'
        };

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

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

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

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

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

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

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

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

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

            function pauseSlider() {
                clearTimeout(timeout);
                jQuery("#" + options.pauseId).hide();
            };

            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 = dir;
                            break;
                    };
                    var diff = Math.abs(ot - t);
                    var speed = diff * options.speed;
                    if (!options.vertical) {
                        p = (t * w * -1);
                        jQuery("ul", obj).animate(
							{ marginLeft: p },
							{ queue: false, duration: speed, complete: adjust }
						);
                    } else {
                        p = (t * h * -1);
                        jQuery("ul", obj).animate(
							{ marginTop: p },
							{ queue: false, duration: speed, complete: adjust }
						);
                    };

                    if (!options.continuous && options.controlsFade) {
                        if (t == ts) {
                            jQuery("a", "#" + options.nextId).hide();
                            jQuery("a", "#" + options.lastId).hide();
                        } else {
                            jQuery("a", "#" + options.nextId).show();
                            jQuery("a", "#" + options.lastId).show();
                        };
                        if (t == 0) {
                            jQuery("a", "#" + options.prevId).hide();
                            jQuery("a", "#" + options.firstId).hide();
                        } else {
                            jQuery("a", "#" + options.prevId).show();
                            jQuery("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);
                    };
                    */
                    if (options.auto && dir == "next") {
                        ;
                        timeout = setTimeout(function() {
                            animate("next", false);
                        }, diff * options.speed + options.pause);

                        // Show the pause button if it's not already revealed
                        if (jQuery("#" + options.pauseId).css("display") == "none") { 
                           jQuery("#" + options.pauseId).show(); 
                        }                        

                    };
                    //alert("ot:" + ot + ", ts: " + ts + ", t: " + t + ", p: " + p);

                    // Set the HTML counter
                    setCounter();

                };

                function setCounter() {
                    var total = ts + 1;
                    var current = t > ts ? 1 : (t < 0 ? ts + 1 : t + 1);
                    var countString = current + " of " + total;
                    jQuery("#" + options.counterId).html(countString);
                };
            };
            // init
            var timeout;
            if (options.auto) {
                ;
                timeout = setTimeout(function() {
                    animate("next", false);
                }, options.pause);
            };

            if (options.numeric) setCurrent(0);

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

        });

    };

})(jQuery);