/*
* jQuery Nivo Slider v2.6
* http://nivo.dev7studios.com
*
* Copyright 2011, Gilbert Pellegrom
* Free to use and abuse under the MIT license.
* http://www.opensource.org/licenses/mit-license.php
* 
* March 2010
*/

(function ($) {

    var NivoSlider = function (element, options) {
        //Defaults are below
        var settings = $.extend({}, $.fn.nivoSlider.defaults, options);

        //Useful variables. Play carefully.
        var vars = {
            currentSlide: 0,
            currentItem: '',
            totalSlides: 0,
            randAnim: '',
            running: false,
            paused: false,
            stop: false
        };

        //Get this slider
        var slider = $(element);
        slider.data('nivo:vars', vars);
        slider.css('position', 'relative');
        slider.addClass('nivoSlider');

        //Find our slider children
        var kids = slider.children();
        kids.each(function () {
            var slideImg = $(this).find('img:first');

            //Get img width & height
            var childWidth = slideImg.width();
            if (childWidth == 0) childWidth = slideImg.attr('width');
            var childHeight = slideImg.height();
            if (childHeight == 0) childHeight = slideImg.attr('height');

            //Resize the slider
            if (childWidth > slider.width()) {
                slider.width(childWidth);
            }
            if (childHeight > slider.height()) {
                slider.height(childHeight);
            }

            $(this).css('display', 'none');
            vars.totalSlides++;
        });

        //Set startSlide
        if (settings.startSlide > 0) {
            if (settings.startSlide >= vars.totalSlides) settings.startSlide = vars.totalSlides - 1;
            vars.currentSlide = settings.startSlide;
        }

        //Get initial image
        vars.currentItem = $(kids[vars.currentSlide]);

        //Show initial link
        $(kids[vars.currentSlide]).css('display', 'block');

        //Set first background
        //slider.css('background', 'url("' + vars.currentItem.find('img:first').attr('src') + '") no-repeat');

        //Create caption
        slider.append(
            $('<div class="nivo-caption"><p></p></div>').css({ display: 'none', opacity: settings.captionOpacity })
        );

        //Start
        var timer = 0;
        if (!settings.manualAdvance && kids.length > 1) {
            timer = setInterval(function () { nivoRun(slider, kids, settings, false); }, settings.pauseTime);
        }

        //Add Direction nav
        if (settings.directionNav) {
            slider.append('<div class="nivo-directionNav"><a class="nivo-prevNav">' + settings.prevText + '</a><a class="nivo-nextNav">' + settings.nextText + '</a></div>');

            //Hide Direction nav
            if (settings.directionNavHide) {
                $('.nivo-directionNav', slider).hide();
                slider.hover(function () {
                    $('.nivo-directionNav', slider).show();
                }, function () {
                    $('.nivo-directionNav', slider).hide();
                });
            }

            $('a.nivo-prevNav', slider).live('click', function () {
                if (vars.running) return false;
                clearInterval(timer);
                timer = '';
                vars.currentSlide -= 2;
                nivoRun(slider, kids, settings, 'prev');
            });

            $('a.nivo-nextNav', slider).live('click', function () {
                if (vars.running) return false;
                clearInterval(timer);
                timer = '';
                nivoRun(slider, kids, settings, 'next');
            });
        }

        //Add Control nav
        if (settings.controlNav) {
            var nivoControl = $('<div class="nivo-controlNav"></div>');
            slider.append(nivoControl);
            for (var i = 0; i < kids.length; i++) {
                nivoControl.append('<a class="nivo-control" rel="' + i + '">' + (i + 1) + '</a>');
            }
            //Set initial active link
            $('.nivo-controlNav a:eq(' + vars.currentSlide + ')', slider).addClass('active');

            $('.nivo-controlNav a', slider).live('click', function () {
                trace('Is running: ' + vars.running);
                if (vars.running) return false;
                trace('Is active: ' + $(this).hasClass('active'));
                if ($(this).hasClass('active')) return false;
                trace('timer before clear: ' + timer);
                clearInterval(timer);
                timer = '';
                trace('currentSlide before clear: ' + vars.currentSlide);

                vars.currentSlide = $(this).attr('rel') - 1; // subtract 1 because nivoRun increments currentSlide
                trace('currentSlide after clear: ' + vars.currentSlide);
                nivoRun(slider, kids, settings, 'control');
            });
        }

        //Keyboard Navigation
        if (settings.keyboardNav) {
            $(window).keypress(function (event) {
                //Left
                if (event.keyCode == '37') {
                    if (vars.running) return false;
                    clearInterval(timer);
                    timer = '';
                    vars.currentSlide -= 2;
                    nivoRun(slider, kids, settings, 'prev');
                }
                //Right
                if (event.keyCode == '39') {
                    if (vars.running) return false;
                    clearInterval(timer);
                    timer = '';
                    nivoRun(slider, kids, settings, 'next');
                }
            });
        }

        //For pauseOnHover setting
        if (settings.pauseOnHover) {
            slider.hover(function () {
                vars.paused = true;
                clearInterval(timer);
                timer = '';
            }, function () {
                vars.paused = false;
                //Restart the timer
                if (timer == '' && !settings.manualAdvance) {
                    timer = setInterval(function () { nivoRun(slider, kids, settings, false); }, settings.pauseTime);
                }
            });
        }

        //Event when Animation finishes
        slider.bind('nivo:animFinished', function () {
            vars.running = false;
            //Restart the timer
            if (timer == '' && !vars.paused && !settings.manualAdvance) {
                timer = setInterval(function () { nivoRun(slider, kids, settings, false); }, settings.pauseTime);
            }
            //Trigger the afterChange callback
            settings.afterChange.call(this);
        });

        // Add slices for slice animations
        var createSlices = function (slider, settings, vars) {
        };

        // Private run method
        var nivoRun = function (slider, kids, settings, nudge) {
            //Get our vars
            var vars = slider.data('nivo:vars');

            //Trigger the lastSlide callback
            if (vars && (vars.currentSlide == vars.totalSlides - 1)) {
                settings.lastSlide.call(this);
            }

            // Stop
            if ((!vars || vars.stop) && !nudge) return false;

            // Trigger the beforeChange callback
            settings.beforeChange.call(this);
            trace('nudge: ' + nudge);

            if (!nudge) {
                var finishingSlice = $(kids[vars.currentSlide]);
                finishingSlice.find('img').animate({ opacity: '0.0' }, (settings.animSpeed * 2), '', function () {
                    finishingSlice.hide();
                });
            } else {
                $(kids).each(function (i, item) {
                    $(this).hide();
                });
            }

            // TODO: Need to check if currentSlide is < 0 after hitting control links
            vars.currentSlide++;

            //Trigger the slideshowEnd callback
            if (vars.currentSlide == vars.totalSlides) {
                vars.currentSlide = 0;
                settings.slideshowEnd.call(this);
            }
            trace('currentSlide after increment: ' + vars.currentSlide);

            if (vars.currentSlide < 0) vars.currentSlide = (vars.totalSlides - 1);

            vars.currentItem = $(kids[vars.currentSlide]);

            //Set active links
            if (settings.controlNav) {
                $('.nivo-controlNav a', slider).removeClass('active');
                $('.nivo-controlNav a:eq(' + vars.currentSlide + ')', slider).addClass('active');
            }

            //Run effects
            vars.running = true;
            if (settings.effect == 'fade' || vars.randAnim == 'fade') {
                createSlices(slider, settings, vars);

                var firstSlice = $(kids[vars.currentSlide]);
                firstSlice.show();
                firstSlice.css({
                    'height': '100%',
                    'width': slider.width() + 'px'
                });

                firstSlice.find('img').css({ opacity: '0' });
                firstSlice.show();
                firstSlice.find('img').animate({ opacity: '1.0' }, (settings.animSpeed * 2), '', function () { slider.trigger('nivo:animFinished'); });
            }
            else if (settings.effect == 'slideInRight' || vars.randAnim == 'slideInRight') {
                createSlices(slider, settings, vars);

                var firstSlice = $('.nivo-slice:first', slider);
                firstSlice.css({
                    'height': '100%',
                    'width': '0px',
                    'opacity': '1'
                });

                firstSlice.animate({ width: slider.width() + 'px' }, (settings.animSpeed * 2), '', function () { slider.trigger('nivo:animFinished'); });
            }
            else if (settings.effect == 'slideInLeft' || vars.randAnim == 'slideInLeft') {
                createSlices(slider, settings, vars);

                var firstSlice = $('.nivo-slice:first', slider);
                firstSlice.css({
                    'height': '100%',
                    'width': '0px',
                    'opacity': '1',
                    'left': '',
                    'right': '0px'
                });

                firstSlice.animate({ width: slider.width() + 'px' }, (settings.animSpeed * 2), '', function () {
                    // Reset positioning
                    firstSlice.css({
                        'left': '0px',
                        'right': ''
                    });
                    slider.trigger('nivo:animFinished');
                });
            }
        }

        // Shuffle an array
        var shuffle = function (arr) {
            for (var j, x, i = arr.length; i; j = parseInt(Math.random() * i), x = arr[--i], arr[i] = arr[j], arr[j] = x);
            return arr;
        }

        // For debugging
        var trace = function (msg) {
            if (this.console && typeof console.log != "undefined")
                console.log(msg);
        }

        // Start / Stop
        this.stop = function () {
            if (!$(element).data('nivo:vars').stop) {
                $(element).data('nivo:vars').stop = true;
                trace('Stop Slider');
            }
        }

        this.start = function () {
            if ($(element).data('nivo:vars').stop) {
                $(element).data('nivo:vars').stop = false;
                trace('Start Slider');
            }
        }

        //Trigger the afterLoad callback
        settings.afterLoad.call(this);

        return this;
    };

    $.fn.nivoSlider = function (options) {

        return this.each(function (key, value) {
            var element = $(this);
            // Return early if this element already has a plugin instance
            if (element.data('nivoslider')) return element.data('nivoslider');
            // Pass options to plugin constructor
            var nivoslider = new NivoSlider(this, options);
            // Store plugin object in this element's data
            element.data('nivoslider', nivoslider);
        });

    };

    //Default settings
    $.fn.nivoSlider.defaults = {
        effect: 'random',
        slices: 15,
        boxCols: 8,
        boxRows: 4,
        animSpeed: 500,
        pauseTime: 3000,
        startSlide: 0,
        directionNav: false,
        directionNavHide: true,
        controlNav: true,
        controlNavThumbs: false,
        controlNavThumbsFromRel: false,
        controlNavThumbsSearch: '.jpg',
        controlNavThumbsReplace: '_thumb.jpg',
        keyboardNav: true,
        pauseOnHover: true,
        manualAdvance: false,
        captionOpacity: 0.8,
        prevText: 'Prev',
        nextText: 'Next',
        beforeChange: function () { },
        afterChange: function () { },
        slideshowEnd: function () { },
        lastSlide: function () { },
        afterLoad: function () { }
    };

    $.fn._reverse = [].reverse;

})(jQuery);