/*

 Title:		jShowOff: a jQuery Content Rotator Plugin
 Author:		Erik Kallevig
 Version:	0.1.2
 Website:	http://ekallevig.com/jshowoff
 License: 	Dual licensed under the MIT and GPL licenses.

 jShowOff Options

 animatePause :		whether to use 'Pause' animation text when pausing [boolean, defaults to true]
 autoPlay :			whether to start playing immediately [boolean, defaults to true]
 changeSpeed :		speed of transition [integer, milliseconds, defaults to 600]
 controls :			whether to create & display controls (Play/Pause, Previous, Next) [boolean, defaults to true]
 controlText :		custom text for controls [object, 'play', 'pause', 'previous' and 'next' properties]
 cssClass :			custom class to add to .jshowoff wrapper [string]
 effect :			transition effect [string: 'fade', 'slideLeft' or 'none', defaults to 'fade']
 hoverPause :		whether to pause on hover [boolean, defaults to true]
 links :				whether to create & display numeric links to each slide [boolean, defaults to true]
 speed :				time each slide is shown [integer, milliseconds, defaults to 3000]

 */

(function ($) {


    $.fn.jshowoff = function (settings) {

        // default global vars
        var config = {
            animatePause:true,
            autoPlay:true,
            changeSpeed:600,
            controls:true,
            controlText:{
                play:'Play',
                pause:'Pause',
                next:'Next',
                previous:'Previous'
            },
            effect:'fade',
            hoverPause:true,
            links:true,
            speed:3000
        };

        // merge default global variables with custom variables, modifying 'config'
        if (settings) $.extend(true, config, settings);

        // make sure speed is at least 20ms longer than changeSpeed
        if (config.speed < (config.changeSpeed + 20)) {
            alert('jShowOff: Make speed at least 20ms longer than changeSpeed; the fades aren\'t always right on time.');
            return this;
        }
        ;

        // create slideshow for each matching element invoked by .jshowoff()
        this.each(function (i) {

            // declare instance variables
            var $cont = $(this);
            var gallery = $(this).children().remove();
            var timer = '';
            var counter = 0;
            var preloadedImg = [];
            var howManyInstances = $('.jshowoff').length + 1;
            var uniqueClass = 'jshowoff-' + howManyInstances;
            var cssClass = config.cssClass != undefined ? config.cssClass : '';


            // set up wrapper
            $cont.css('position', 'relative').wrap('<div class="jshowoff ' + uniqueClass + '" />');
            var $wrap = $('.' + uniqueClass);
            $wrap.css('position', 'relative').addClass(cssClass);

            // add first slide to wrapper
            $(gallery[0]).clone().appendTo($cont);

            // preload slide images into memory
            preloadImg();

            // add controls
            if (config.controls) {
                addControls();
                if (config.autoPlay == false) {
                    $('.' + uniqueClass + '-play').addClass(uniqueClass + '-paused jshowoff-paused').text(config.controlText.play);
                }
                ;
            }
            ;

            // add slide links
            if (config.links) {
                addSlideLinks();
                $('.' + uniqueClass + '-slidelinks a').eq(0).addClass(uniqueClass + '-active jshowoff-active');
            }
            ;

            // pause slide rotation on hover
            if (config.hoverPause) {
                $cont.hover(
                        function () {
                            if (isPlaying()) pause('hover');
                        },
                        function () {
                            if (isPlaying()) play('hover');
                        }
                );
            }
            ;

            // determine autoPlay
            if (config.autoPlay && gallery.length > 1) {
                timer = setInterval(function () {
                    play();
                }, config.speed);
            }
            ;

            // display error message if no slides present
            if (gallery.length < 1) {
                $('.' + uniqueClass).append('<p>For jShowOff to work, the container element must have child elements.</p>');
            }
            ;


            // utility for loading slides
            function transitionTo(gallery, index) {

                var oldCounter = counter;
                if ((counter >= gallery.length) || (index >= gallery.length)) {
                    counter = 0;
                    var e2b = true;
                }
                else if ((counter < 0) || (index < 0)) {
                    counter = gallery.length - 1;
                    var b2e = true;
                }
                else {
                    counter = index;
                }


                if (config.effect == 'slideLeft') {
                    var newSlideDir, oldSlideDir;

                    function slideDir(dir) {
                        newSlideDir = dir == 'right' ? 'left' : 'right';
                        oldSlideDir = dir == 'left' ? 'left' : 'right';
                    }

                    ;


                    counter >= oldCounter ? slideDir('left') : slideDir('right');

                    $(gallery[counter]).clone().appendTo($cont).slideIt({direction:newSlideDir, changeSpeed:config.changeSpeed});
                    if ($cont.children().length > 1) {
                        $cont.children().eq(0).css('position', 'absolute').slideIt({direction:oldSlideDir, showHide:'hide', changeSpeed:config.changeSpeed}, function () {
                            $(this).remove();
                        });
                    }
                    ;
                } else if (config.effect == 'fade') {
                    $(gallery[counter]).clone().appendTo($cont).hide().fadeIn(config.changeSpeed, function () {
                        if ($.browser.msie)this.style.removeAttribute('filter');
                    });
                    if ($cont.children().length > 1) {
                        $cont.children().eq(0).css('position', 'absolute').fadeOut(config.changeSpeed, function () {
                            $(this).remove();
                        });
//                        $cont.children().eq(0).fadeOut(config.changeSpeed,function(){$(this).remove();});
                    }
                    ;
                } else if (config.effect == 'none') {
                    $(gallery[counter]).clone().appendTo($cont);
                    if ($cont.children().length > 1) {
                        $cont.children().eq(0).css('position', 'absolute').remove();
                    }
                    ;
                }
                ;

                // update active class on slide link
                if (config.links) {
                    $('.' + uniqueClass + '-active').removeClass(uniqueClass + '-active jshowoff-active');
                    $('.' + uniqueClass + '-slidelinks a').eq(counter).addClass(uniqueClass + '-active jshowoff-active');
                }
                ;
            }

            ;

            // is the rotator currently in 'play' mode
            function isPlaying() {
                return $('.' + uniqueClass + '-play').hasClass('jshowoff-paused') ? false : true;
            }

            ;

            // start slide rotation on specified interval
            function play(src) {
                if (!isBusy()) {
                    counter++;
                    transitionTo(gallery, counter);
                    if (src == 'hover' || !isPlaying()) {
                        timer = setInterval(function () {
                            play();
                        }, config.speed);
                    }
                    if (!isPlaying()) {
                        $('.' + uniqueClass + '-play').text(config.controlText.pause).removeClass('jshowoff-paused ' + uniqueClass + '-paused');
                    }
                }
                ;
            }

            ;

            // stop slide rotation
            function pause(src) {
                clearInterval(timer);
                if (!src || src == 'playBtn') $('.' + uniqueClass + '-play').text(config.controlText.play).addClass('jshowoff-paused ' + uniqueClass + '-paused');
                if (config.animatePause && src == 'playBtn') {
                    $('<p class="' + uniqueClass + '-pausetext jshowoff-pausetext">' + config.controlText.pause + '</p>').css({ fontSize:'62%', textAlign:'center', position:'absolute', top:'40%', lineHeight:'100%', width:'100%' }).appendTo($wrap).addClass(uniqueClass + 'pauseText').animate({ fontSize:'600%', top:'30%', opacity:0 }, {duration:500, complete:function () {
                        $(this).remove();
                    }});
                }
            }

            ;

            // load the next slide
            function next() {
                goToAndPause(counter + 1);
            }

            ;

            // load the previous slide
            function previous() {
                goToAndPause(counter - 1);
            }

            ;

            // is the rotator in mid-transition
            function isBusy() {
                return $cont.children().length > 1 ? true : false;
            }

            ;

            // load a specific slide
            function goToAndPause(index) {
                $cont.children().stop(true, true);
                if ((counter != index) || ((counter == index) && isBusy())) {
                    if (isBusy()) $cont.children().eq(0).remove();
                    transitionTo(gallery, index);
                    pause();
                }
                ;
            }

            ;

            // load images into memory
            function preloadImg() {
                $(gallery).each(function (i) {
                    $(this).find('img').each(function (i) {
                        preloadedImg[i] = $('<img>').attr('src', $(this).attr('src'));
                    });
                });
            }

            ;

            // generate and add play/pause, prev, next controls
            function addControls() {
                $wrap.append('<p class="jshowoff-controls ' + uniqueClass + '-controls"><a class="jshowoff-play ' + uniqueClass + '-play" href="#null">' + config.controlText.pause + '</a> <a class="jshowoff-prev ' + uniqueClass + '-prev" href="#null">' + config.controlText.previous + '</a> <a class="jshowoff-next ' + uniqueClass + '-next" href="#null">' + config.controlText.next + '</a></p>');
                $('.' + uniqueClass + '-controls a').each(function () {
                    if ($(this).hasClass('jshowoff-play')) $(this).click(function () {
                        isPlaying() ? pause('playBtn') : play();
                        return false;
                    });
                    if ($(this).hasClass('jshowoff-prev')) $(this).click(function () {
                        previous();
                        return false;
                    });
                    if ($(this).hasClass('jshowoff-next')) $(this).click(function () {
                        next();
                        return false;
                    });

                });
            }

            ;

            // generate and add slide links
            function addSlideLinks() {
                $wrap.append('<p class="jshowoff-slidelinks ' + uniqueClass + '-slidelinks"></p>');
                $.each(gallery, function (i, val) {
                    var linktext = ($(this).attr('title') != null) ? $(this).attr('title') : i + 1;
                    $('<a class="jshowoff-slidelink-' + i + ' ' + uniqueClass + '-slidelink-' + i + '" href="#null">' + linktext + '</a>').bind('click', {index:i},
                            function (e) {
                                goToAndPause(e.data.index);
                                return false;
                            }).appendTo('.' + uniqueClass + '-slidelinks');
                });
            }

            ;


            // end .each
        });

        return this;

        // end .jshowoff
    };

// end closure
})(jQuery);


(function ($) {

    $.fn.slideIt = function (settings, callback) {

        // default global vars
        var config = {
            direction:'left',
            showHide:'show',
            changeSpeed:600
        };

        // merge default global variables with custom variables, modifying 'config'
        if (settings) $.extend(config, settings);

        this.each(function (i) {
            $(this).css({left:'auto', right:'auto', top:'auto', bottom:'auto'});
            var measurement = (config.direction == 'left') || (config.direction == 'right') ? $(this).outerWidth() : $(this).outerHeight();
            var startStyle = {};
            startStyle['position'] = $(this).css('position') == 'static' ? 'relative' : $(this).css('position');
            startStyle[config.direction] = (config.showHide == 'show') ? '-' + measurement + 'px' : 0;
            var endStyle = {};
            endStyle[config.direction] = config.showHide == 'show' ? 0 : '-' + measurement + 'px';
            $(this).css(startStyle).animate(endStyle, config.changeSpeed, callback);
            // end .each
        });

        return this;

        // end .slideIt
    };

// end closure
})(jQuery);