/*
 * 	Easy Slider 1.5 - 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,
            dotNav: false,//Added for Marketlink Solutions' default home page slider
            dotContainerId: 'dot_container',
            dotClass: 'slider_position_dot',
            titleText: false, //Added for Marketlink Solutions' case studies
            titleTextId: 'titleText',
            vertical: false,
            speed: 800,
            auto: false,
            pause: 2000,
            continuous: false
        };

        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();
            obj.width(w);
            obj.height(h);
            obj.css("overflow", "hidden");
            obj.css("position", "relative");
            var ts = s - 1;
            var t = 0;
            var jumpTo = 0;

            $("ul", obj).css('width', s * w);
            if (!options.vertical) $("li", obj).css('float', 'left');

            if (options.controlsShow) {
                var html = options.controlsBefore;
                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>';
                if (options.titleText) { html += ' <span id="' + options.titleTextId + '"></span>'; }
                html += ' <span id="' + options.nextId + '"><a href=\"javascript:void(0);\">' + options.nextText + '</a></span>';

                if (options.dotNav) {
                    var slideCount = 0;
                    html += '<div id="' + options.dotContainerId + '" class="clearfix">';
                    $("ul", obj).children().each(function() {
                        if (slideCount == 0) {
                            html += '<a href=\"javascript:void(0);\" id="on" class="' + options.dotClass + '" rel="' + slideCount + '"><span class="hidden">' + slideCount + '</span></a>';
                        }
                        else {
                            html += '<a href=\"javascript:void(0);\" id="off" class="' + options.dotClass + '" rel="' + slideCount + '"><span class="hidden">' + slideCount + '</span></a>';
                        }
                        slideCount++;
                    });
                    html += '</div>';
                }

                if (options.lastShow) html += ' <span id="' + options.lastId + '"><a href=\"javascript:void(0);\">' + options.lastText + '</a></span>';
                html += options.controlsAfter;
                $(obj).after(html);
            };

            slideTitleText(0); //To initialize the title text for EasySlider 1.5 case study mod

            $("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);
            });
            $("a." + options.dotClass).click(function() {
                var relPos = $(this).attr("rel");
                jumpTo = relPos;
                animate("jump", true);
            });

            //Case study mod. Called at animate() for "next" and "prev" only
            function slideTitleText(currentSlide) {
                var objSlideList = $("ul", obj);
                var i = 0;
                var labelText;
                objSlideList.children().each(function() {
                    var child = $(this);
                    if (i == currentSlide) {
                        child.children().each(function() {
                            labelText = $(this).attr("alt");
                            $("#" + options.titleTextId).text(labelText)
                        });
                    }
                    i++;
                });
            }

            function dotPositionJump(dpj) {
                var nowWhat = 0;
                $("div#dot_container").children().each(function() {
                    if (nowWhat == dpj) {
                        $(this).attr("id", "on");
                    } else {
                        $(this).attr("id", "off");
                    }
                    nowWhat++;
                });
            }

            function animate(dir, clicked) {
                var ot = t;
                var ct = t;
                switch (dir) {
                    case "next":
                        t = (ot >= ts) ? (options.continuous ? 0 : ts) : t + 1;
                        if (options.titleText) { slideTitleText(t); };
                        if (options.dotNav) { dotPositionJump(t) };
                        break;
                    case "prev":
                        t = (t <= 0) ? (options.continuous ? ts : 0) : t - 1;
                        if (options.titleText) { slideTitleText(t); };
                        if (options.dotNav) { dotPositionJump(t) };
                        break;
                    case "first":
                        t = 0;
                        break;
                    case "last":
                        t = ts;
                        break;
                    case "jump":
                        t = parseInt(jumpTo);
                        if (options.dotNav) { dotPositionJump(t) };
                        break
                    default:
                        break;
                };

                var diff = Math.abs(ot - t);
                var speed = diff * options.speed;
                if (!options.vertical) {
                    p = (t * w * -1);
                    $("ul", obj).stop().animate(
						{ marginLeft: p },
						speed
					);
                } else {
                    p = (t * h * -1);
                    $("ul", obj).stop().animate(
						{ marginTop: p },
						speed
					);
                };

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

        });

    };

})(jQuery);