/*
* Slides, A Slideshow Plugin for jQuery
* Intructions: http://slidesjs.com
* By: Nathan Searles, http://nathansearles.com
* Version: 1.0.2
* Updated: November 30th, 2010
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

(function($){
        $.fn.slides = function( option ) {

                // override defaults with specified option
                option = $.extend( {}, $.fn.slides.option, option );

                return this.each(function(){
			
                        // wrap slides in control container, make sure slides are block level
                        $('.' + option.container, $(this)).children().wrapAll('<div class="slides_control"/>');
			
                        var elem = $(this),
                        control = $('.slides_control',elem),
                        total = control.children().size(),
                        width = control.children().outerWidth(),
                        height = control.children().outerHeight(),
                        start = option.start - 1,
                        effect = option.effect.indexOf(',') < 0 ? option.effect : option.effect.replace(' ', '').split(',')[0],
                        paginationEffect = option.effect.indexOf(',') < 0 ? effect : option.effect.replace(' ', '').split(',')[1],
                        next = 0, prev = 0, number = 0, current = 0, loaded, active, clicked, position, direction;	
                      //  console.log("width: "+width);
                        // 2 or more slides required
                        if (total < 2) {
                                return;
                        }
					
                        // change current based on start option number
                        if (option.start) {
                                current = start;
                        };
			
                        // randomizes slide order
                        if (option.randomize) {
                                control.randomize();
                        }
			
                        // make sure overflow is hidden
                        $('.' + option.container, elem).css({
                                overflow: 'hidden',
                                // fix for ie
                                position: 'relative'
                        });
			
                        control.css({
                                position: 'relative',
                                // size of control 3 x slide width
                                // ----------------------------------------------------------------------------
                                //width: (width * 3),
                                // set height to slide height
                                height: height
                                // center control to slide
                                // // ----------------------------------------------------------------------------
                              //  left: -width
                        });
			
                        // set css for slides	
                        control.children().css({
                                position: 'absolute',
                                top: 0, 
                               // ----------------------------------------------------------------------------
                               //left: width,
                               left:0,
                                zIndex: 0,
                                display: 'none'
                        });
			
                        // if autoHeight true, get and set height of first slide
                        if (option.autoHeight) {
                                control.animate({
                                        height: control.children(':eq('+ start +')').outerHeight()
                                },o.autoHeightSpeed);
                        }
			
                        // checks if image is loaded
                        if (option.preload && control.children()[0].tagName=='IMG') {
                                // adds preload image
                                elem.css({
                                        background: 'url(' + option.preloadImage + ') no-repeat 50% 50%'
                                });
				
                                // gets image src, with cache buster
                                var img = $('img:eq(' + start + ')', elem).attr('src') + '?' + (new Date()).getTime();
				
                                // checks if image is loaded
                                $('img:eq(' + start + ')', elem).attr('src', img).load(function() {
                                        // once image is fully loaded, fade in
                                        $(this).fadeIn(option.fadeSpeed,function(){
                                                $(this).css({
                                                        zIndex: 5
                                                });
                                                // removes preload image
                                                elem.css({
                                                        background: ''
                                                });
                                                // let the script know everything is loaded
                                                loaded = true;
                                        });
                                });
                        } else {
                                // if no preloader fade in start slide
                                control.find(':eq(' + start + ')').fadeIn(option.fadeSpeed,function(){
                                        // let the script know everything is loaded
                                        loaded = true;
                                });
                        }
			
                        // click slide for next
                        if (option.bigTarget) {
                                // set cursor to pointer
                                control.children().css({
                                        cursor: 'pointer'
                                });
                                // click handler
                                control.children().click(function(){
                                        // animate to next on slide click
                                        animate('next', effect);
                                        return false;
                                });									
                        }
			
                        // pause on mouseover
                        if (option.hoverPause && option.play) {
                                control.children().bind('mouseover',function(){
                                        // on mouse over stop
                                        stop();
                                });
                                control.children().bind('mouseleave',function(){
                                        // on mouse leave start pause timeout
                                        pause();
                                });
                        }
			
                        // generate next/prev buttons
                        if (option.generateNextPrev) {
                                $('.' + option.container, elem).after('<a href="#" class="'+ option.prev +'">Prev</a>');
                                $('.' + option.prev, elem).after('<a href="#" class="'+ option.next +'">Next</a>');
                        }
			
                        // next button
                        $('.' + option.next ,elem).click(function(e){
                                e.preventDefault();
                                if (option.play) {
                                        pause();
                                };
                                animate('next', effect);
                        });
			
                        // previous button
                        $('.' + option.prev, elem).click(function(e){
                                e.preventDefault();
                                if (option.play) {
                                        pause();
                                };
                                animate('prev', effect);
                        });
			
                        // generate pagination
                        if (option.generatePagination) {
                                // create unordered list
                                elem.append('<ul class='+ option.paginationClass +'></ul>');
                                // for each slide create a list item and link
                                control.children().each(function(){
                                        $('.' + option.paginationClass, elem).append('<li><a rel='+ number +' href="#">'+ (number+1) +'</a></li>');
                                        number++;
                                });
                        } else {
                                // if pagination exists, add rel w/ value of item number to links
                                $('.' + option.paginationClass + ' li a', elem).each(function(){
                                        $(this).attr('rel', number);
                                        number++;
                                });
                        }
                        // add current class to start slide pagination
                        $('.' + option.paginationClass + ' li a:eq('+ start +')', elem).parent().addClass('current');
                        // click handling 
                        $('.' + option.paginationClass + ' li a', elem ).click(function(){
                                // pause slideshow
                                if (option.play) {
                                        pause();
                                };
                                // get clicked, pass to animate function					
                                clicked = $(this).attr('rel');
                                // if current slide equals clicked, don't do anything
                                if (current != clicked) {
                                        animate('pagination', paginationEffect, clicked);
                                }
                                return false;
                        });
		
                        if (option.play) {
                                // set interval
                                playInterval = setInterval(function() {
                                        animate('next', effect);
                                }, option.play);
                                // store interval id
                                elem.data('interval',playInterval);
                        };
				
                        function stop() {
                                // clear interval from stored id
                                clearInterval(elem.data('interval'));
                        };

                        function pause() {
                                if (option.pause) {
                                        // clear timeout and interval
                                        clearTimeout(elem.data('pause'));
                                        clearInterval(elem.data('interval'));
                                        // pause slide show for option.pause amount
                                        pauseTimeout = setTimeout(function() {
                                                // clear pause timeout
                                                clearTimeout(elem.data('pause'));
                                                // start play interval after pause
                                                playInterval = setInterval(	function(){
                                                        animate("next", effect);
                                                },option.play);
                                                // store play interval
                                                elem.data('interval',playInterval);
                                        },option.pause);
                                        // store pause interval
                                        elem.data('pause',pauseTimeout);
                                } else {
                                        // if no pause, just stop
                                        stop();
                                }
                        };
			
                        // animate slides
                        function animate(direction, effect, clicked) {
                                if (!active && loaded) {
                                        active = true;
                                        switch(direction) {
                                                case 'next':
                                                        // change current slide to previous
                                                        prev = current;
                                                        // get next from current + 1
                                                        next = current + 1;
                                                        // if last slide, set next to first slide
                                                        next = total === next ? 0 : next;
                                                        // set position of next slide to right of previous
                                                        position = width*2;
                                                        // distance to slide based on width of slides
                                                        direction = -width*2;
                                                        // store new current slide
                                                        current = next;
                                                        break;
                                                case 'prev':
                                                        // change current slide to previous
                                                        prev = current;
                                                        // get next from current - 1
                                                        next = current - 1;
                                                        // if first slide, set next to last slide
                                                        next = next === -1 ? total-1 : next;								
                                                        // set position of next slide to left of previous
                                                        position = 0;								
                                                        // distance to slide based on width of slides
                                                        direction = 0;		
                                                        // store new current slide
                                                        current = next;
                                                        break;
                                                case 'pagination':
                                                        // get next from pagination item clicked, convert to number
                                                        next = parseInt(clicked,10);
                                                        // get previous from pagination item with class of current
                                                        prev = $('.' + option.paginationClass + ' li.current a', elem).attr('rel');
                                                        // if next is greater then previous set position of next slide to right of previous
                                                        if (next > prev) {
                                                                position = width*2;
                                                                direction = -width*2;
                                                        } else {
                                                                // if next is less then previous set position of next slide to left of previous
                                                                position = 0;
                                                                direction = 0;
                                                        }
                                                        // store new current slide
                                                        current = next;
                                                        break;
                                        }
					
                                        // fade animation
                                        if (effect === 'fade') {
                                                console.log('fading animation');
                                                // fade animation with crossfade
                                                if (option.crossfade) {
                                                        // put hidden next above current
                                                        control.children(':eq('+ next +')', elem).css({
                                                                zIndex: 10
                                                        // fade in next
                                                        }).fadeIn(option.fadeSpeed, function(){
                                                                // hide previous
                                                                control.children(':eq('+ prev +')', elem).css({
                                                                        display: 'none',
                                                                        zIndex: 0
                                                                });
                                                                // reset z index
                                                                $(this).css({
                                                                        zIndex: 0
                                                                });
                                                                // end of animation
                                                                active = false;
                                                        });
                                                } else {
                                                        // fade animation with no crossfade
                                                        control.children(':eq('+ prev +')', elem).fadeOut(option.fadeSpeed,function(){
                                                                // animate to new height
                                                                if (option.autoHeight) {
                                                                        control.animate({
                                                                                // animate container to height of next
                                                                                height: control.children(':eq('+ next +')', elem).outerHeight()
                                                                        }, option.autoHeightSpeed,
                                                                        // fade in next slide
                                                                        function(){
                                                                                control.children(':eq('+ next +')', elem).fadeIn(elem.data('slides').fadeSpeed);
                                                                        });
                                                                } else {
                                                                        // if fixed height
                                                                        control.children(':eq('+ next +')', elem).fadeIn(option.fadeSpeed,function(){
                                                                                // fix font rendering in ie, lame
                                                                                if($.browser.msie) {
                                                                                        $(this).get(0).style.removeAttribute('filter');
                                                                                }
                                                                        });
                                                                }									
                                                                // end of animation
                                                                active = false;
                                                        });
                                                }
                                        // slide animation
                                        } else {
                                                // move next slide to right of previous
                                                control.children(':eq('+ next +')').css({
                                                        left: position,
                                                        display: 'block'
                                                });
                                                // animate to new height
                                                if (option.autoHeight) {
                                                        control.animate({
                                                                left: direction,
                                                                height: control.children(':eq('+ next +')').outerHeight()
                                                        },option.slideSpeed,function(){
                                                                control.css({
                                                                        left: -width
                                                                });
                                                                control.children(':eq('+ next +')').css({
                                                                        left: width,
                                                                        zIndex: 5
                                                                });
                                                                // reset previous slide
                                                                control.children(':eq('+ prev +')').css({
                                                                        left: width,
                                                                        display: 'none',
                                                                        zIndex: 0
                                                                });
                                                                // end of animation
                                                                active = false;
                                                        });
                                                // if fixed height
                                                } else {
                                                        // animate control
                                                        control.animate({
                                                                left: direction
                                                        },option.slideSpeed,function(){
                                                                // after animation reset control position
                                                                control.css({
                                                                        left: -width
                                                                });
                                                                // reset and show next
                                                                control.children(':eq('+ next +')').css({
                                                                        left: width,
                                                                        zIndex: 5
                                                                });
                                                                // reset previous slide
                                                                control.children(':eq('+ prev +')').css({
                                                                        left: width,
                                                                        display: 'none',
                                                                        zIndex: 0
                                                                });
                                                                // end of animation
                                                                active = false;
                                                        });
                                                }
                                        }
                                        // set current state for pagination
                                        if (option.pagination) {
                                                // remove current class from all
                                                $('.'+ option.paginationClass +' li.current', elem).removeClass('current');
                                                // add current class to next
                                                $('.'+ option.paginationClass +' li a:eq('+ next +')', elem).parent().addClass('current');
                                        }
                                }
                        }; // end animate function
                });
        };
	
        // default options
        $.fn.slides.option = {
                preload: false, // boolean, Set true to preload images in an image based slideshow
                preloadImage: '/img/loading.gif', // string, Name and location of loading image for preloader. Default is "/img/loading.gif"
                container: 'slides_container', // string, Class name for slides container. Default is "slides_container"
                generateNextPrev: false, // boolean, Auto generate next/prev buttons
                next: 'next', // string, Class name for next button
                prev: 'prev', // string, Class name for previous button
                pagination: true, // boolean, If you're not using pagination you can set to false, but don't have to
                generatePagination: true, // boolean, Auto generate pagination
                paginationClass: 'pagination', // string, Class name for pagination
                fadeSpeed: 350, // number, Set the speed of the fading animation in milliseconds
                slideSpeed: 350, // number, Set the speed of the sliding animation in milliseconds
                start: 1, // number, Set the speed of the sliding animation in milliseconds
                effect: 'slide', // string, '[next/prev], [pagination]', e.g. 'slide, fade' or simply 'fade' for both
                crossfade: true, // boolean, Crossfade images in a image based slideshow
                randomize: false, // boolean, Set to true to randomize slides
                play: 0, // number, Autoplay slideshow, a positive number will set to true and be the time between slide animation in milliseconds
                pause: 0, // number, Pause slideshow on click of next/prev or pagination. A positive number will set to true and be the time of pause in milliseconds
                hoverPause: false, // boolean, Set to true and hovering over slideshow will pause it
                autoHeight: false, // boolean, Set to true to auto adjust height
                autoHeightSpeed: 350, // number, Set auto height animation time in milliseconds
                bigTarget: false // boolean, Set to true and the whole slide will link to next slide on click
        };
	
        // Randomize slide order on load
        $.fn.randomize = function(callback) {
                function randomizeOrder() {
                        return(Math.round(Math.random())-0.5);
                }
                return($(this).each(function() {
                        var $this = $(this);
                        var $children = $this.children();
                        var childCount = $children.length;
                        if (childCount > 1) {
                                $children.hide();
                                var indices = [];
                                for (i=0;i<childCount;i++) {
                                        indices[indices.length] = i;
                                }
                                indices = indices.sort(randomizeOrder);
                                $.each(indices,function(j,k) { 
                                        var $child = $children.eq(k);
                                        var $clone = $child.clone(true);
                                        $clone.show().appendTo($this);
                                        if (callback !== undefined) {
                                                callback($child, $clone);
                                        }
                                        $child.remove();
                                });
                        }
                }));
        };
})(jQuery);