/**

 *   Unslider by @idiot

 */

(function($, f) {

    //  If there's no jQuery, Unslider can't work, so kill the operation.

    if(!$) return f;

    var Unslider = function() {

        //  Set up our elements

        this.el = f;

        this.items = f;

        //  Dimensions

        this.sizes = [];

        this.max = [0,0];

        //  Current inded

        this.current = 0;

        //  Start/stop timer

        this.interval = f;

        //  Set some options

        this.opts = {

            speed: 500,

            delay: 3000, // f for no autoplay

            complete: f, // when a slide's finished

            keys: !f, // keyboard shortcuts - disable if it breaks things

            dots: f, // display ••••o• pagination

            fluid: f // is it a percentage width?,

        };

        //  Create a deep clone for methods where context changes

        var _ = this;

        this.init = function(el, opts) {

            this.el = el;

            this.ul = el.children('ul');

            this.max = [el.outerWidth(), el.outerHeight()];

            this.items = this.ul.children('li').each(this.calculate);

            //  Check whether we're passing any options in to Unslider

            this.opts = $.extend(this.opts, opts);

            //  Set up the Unslider

            this.setup();

            return this;

        };

        //  Get the width for an element

        //  Pass a jQuery element as the context with .call(), and the index as a parameter: Unslider.calculate.call($('li:first'), 0)

        this.calculate = function(index) {

            var me = $(this),

                width = me.outerWidth(), height = me.outerHeight();

            //  Add it to the sizes list

            _.sizes[index] = [width, height];

            //  Set the max values

            if(width > _.max[0]) _.max[0] = width;

            if(height > _.max[1]) _.max[1] = height;

        };

        //  Work out what methods need calling

        this.setup = function() {

            //  Set the main element

            this.el.css({

                overflow: 'hidden',

                width: _.max[0],

                height: this.items.first().outerHeight()

            });

            //  Set the relative widths

            this.ul.css({width: (this.items.length * 100) + '%', position: 'relative'});

            this.items.css('width', (100 / this.items.length) + '%');

            if(this.opts.delay !== f) {

                this.start();

                this.el.hover(this.stop, this.start);

            }

            //  Custom keyboard support

            this.opts.keys && $(document).keydown(this.keys);

            //  Dot pagination

            this.opts.dots && this.dots();

            //  Little patch for fluid-width sliders. Screw those guys.

            if(this.opts.fluid) {

                var resize = function() {

                    _.el.css('width', Math.min(Math.round((_.el.outerWidth() / _.el.parent().outerWidth()) * 100), 100) + '%');

                };

                resize();

                $(window).resize(resize);

            }

            if(this.opts.arrows) {

                this.el.parent().append('<p class="arrows"><span class="prev">←</span><span class="next">→</span></p>')

                    .find('.arrows span').click(function() {

                        $.isFunction(_[this.className]) && _[this.className]();

                    });

            };

            //  Swipe support

            if($.event.swipe) {

                this.el.on('swipeleft', _.prev).on('swiperight', _.next);

            }

        };

        //  Move Unslider to a slide index

        this.move = function(index, cb) {

            //  If it's out of bounds, go to the first slide

            if(!this.items.eq(index).length) index = 0;

            if(index < 0) index = (this.items.length - 1);

            var target = this.items.eq(index);

            var obj = {height: target.outerHeight()};

            var speed = cb ? 5 : this.opts.speed;

            if(!this.ul.is(':animated')) {

                //  Handle those pesky dots

                _.el.find('.dot:eq(' + index + ')').addClass('active').siblings().removeClass('active');

                this.el.animate(obj, speed) && this.ul.animate($.extend({left: '-' + index + '00%'}, obj), speed, function(data) {

                    _.current = index;

                    $.isFunction(_.opts.complete) && !cb && _.opts.complete(_.el);

                });

            }

        };

        //  Autoplay functionality

        this.start = function() {

            _.interval = setInterval(function() {

                _.move(_.current + 1);

            }, _.opts.delay);

        };

        //  Stop autoplay

        this.stop = function() {

            _.interval = clearInterval(_.interval);

            return _;

        };

        //  Keypresses

        this.keys = function(e) {

            var key = e.which;

            var map = {

                //  Prev/next

                37: _.prev,

                39: _.next,

                //  Esc

                27: _.stop

            };

            if($.isFunction(map[key])) {

                map[key]();

            }

        };

        //  Arrow navigation

        this.next = function() { return _.stop().move(_.current + 1) };

        this.prev = function() { return _.stop().move(_.current - 1) };

        this.dots = function() {

            //  Create the HTML

            var html = '<ol class="dots">';

                $.each(this.items, function(index) { html += '<li class="dot' + (index < 1 ? ' active' : '') + '">' + (index + 1) + '</li>'; });

                html += '</ol>';

            //  Add it to the Unslider

            this.el.addClass('has-dots').append(html).find('.dot').click(function() {

                _.move($(this).index());

            });

        };

    };

    //  Create a jQuery plugin

    $.fn.unslider = function(o) {

        var len = this.length;

        //  Enable multiple-slider support

        return this.each(function(index) {

            //  Cache a copy of $(this), so it

            var me = $(this);

            var instance = (new Unslider).init(me, o);

            //  Invoke an Unslider instance

            me.data('unslider' + (len > 1 ? '-' + (index + 1) : ''), instance);

        });

    };

})(window.jQuery, false);