/*! UIkit 2.27.2 | www.getuikit.com | © 2014 YOOtheme | MIT License */ (function(addon) {

var component;

if (window.UIkit) {
    component = addon(UIkit);
}

if (typeof define == 'function' && define.amd) {
    define('uikit-slider', ['uikit'], function(){
        return component || addon(UIkit);
    });
}

})(function(UI){

"use strict";

var dragging, delayIdle, anchor, dragged, store = {};

UI.component('slider', {

    defaults: {
        center           : false,
        threshold        : 10,
        infinite         : true,
        autoplay         : false,
        autoplayInterval : 7000,
        pauseOnHover     : true,
        activecls        : 'uk-active'
    },

    boot:  function() {

        // init code
        UI.ready(function(context) {

            setTimeout(function(){

                UI.$('[data-uk-slider]', context).each(function(){

                    var ele = UI.$(this);

                    if (!ele.data('slider')) {
                        UI.slider(ele, UI.Utils.options(ele.attr('data-uk-slider')));
                    }
                });

            }, 0);
        });
    },

    init: function() {

        var $this = this;

        this.container = this.element.find('.uk-slider');
        this.focus     = 0;

        UI.$win.on('resize load', UI.Utils.debounce(function() {
            $this.update(true);
        }, 100));

        this.on('click.uk.slider', '[data-uk-slider-item]', function(e) {

            e.preventDefault();

            var item = UI.$(this).attr('data-uk-slider-item');

            if ($this.focus == item) return;

            // stop autoplay
            $this.stop();

            switch(item) {
                case 'next':
                case 'previous':
                    $this[item=='next' ? 'next':'previous']();
                    break;
                default:
                    $this.updateFocus(parseInt(item, 10));
            }
        });

        this.container.on({

            'touchstart mousedown': function(evt) {

                if (evt.originalEvent && evt.originalEvent.touches) {
                    evt = evt.originalEvent.touches[0];
                }

                // ignore right click button
                if (evt.button && evt.button==2 || !$this.active) {
                    return;
                }

                // stop autoplay
                $this.stop();

                anchor  = UI.$(evt.target).is('a') ? UI.$(evt.target) : UI.$(evt.target).parents('a:first');
                dragged = false;

                if (anchor.length) {

                    anchor.one('click', function(e){
                        if (dragged) e.preventDefault();
                    });
                }

                delayIdle = function(e) {

                    dragged  = true;
                    dragging = $this;
                    store    = {
                        touchx : parseInt(e.pageX, 10),
                        dir    : 1,
                        focus  : $this.focus,
                        base   : $this.options.center ? 'center':'area'
                    };

                    if (e.originalEvent && e.originalEvent.touches) {
                        e = e.originalEvent.touches[0];
                    }

                    dragging.element.data({
                        'pointer-start': {x: parseInt(e.pageX, 10), y: parseInt(e.pageY, 10)},
                        'pointer-pos-start': $this.pos
                    });

                    $this.container.addClass('uk-drag');

                    delayIdle = false;
                };

                delayIdle.x         = parseInt(evt.pageX, 10);
                delayIdle.threshold = $this.options.threshold;

            },

            mouseenter: function() { if ($this.options.pauseOnHover) $this.hovering = true;  },
            mouseleave: function() { $this.hovering = false; }
        });

        this.update(true);

        this.on('display.uk.check', function(){
            if ($this.element.is(":visible")) {
                $this.update(true);
            }
        });

        // prevent dragging links + images
        this.element.find('a,img').attr('draggable', 'false');

        // Set autoplay
        if (this.options.autoplay) {
            this.start();
        }

        UI.domObserve(this.element, function(e) {
            if ($this.element.children(':not([data-slider-slide])').length) {
                $this.update(true);
            }
        });

    },

    update: function(focus) {

        var $this = this, pos = 0, maxheight = 0, item, width, cwidth, size;

        this.items = this.container.children().filter(':visible');
        this.vp    = this.element[0].getBoundingClientRect().width;

        this.container.css({'min-width': '', 'min-height': ''});

        this.items.each(function(idx){

            item      = UI.$(this).attr('data-slider-slide', idx);
            size      = item.css({'left': '', 'width':''})[0].getBoundingClientRect();
            width     = size.width;
            cwidth    = item.width();
            maxheight = Math.max(maxheight, size.height);

            item.css({'left': pos, 'width':width}).data({'idx':idx, 'left': pos, 'width': width, 'cwidth':cwidth, 'area': (pos+width), 'center':(pos - ($this.vp/2 - cwidth/2))});

            pos += width;
        });

        this.container.css({'min-width': pos, 'min-height': maxheight});

        if (this.options.infinite && (pos <= (2*this.vp) || this.items.length < 5) && !this.itemsResized) {

            // fill with cloned items
            this.container.children().each(function(idx){
               $this.container.append($this.items.eq(idx).clone(true).attr('id', ''));
            }).each(function(idx){
               $this.container.append($this.items.eq(idx).clone(true).attr('id', ''));
            });

            this.itemsResized = true;

            return this.update();
        }

        this.cw     = pos;
        this.pos    = 0;
        this.active = pos >= this.vp;

        this.container.css({
            '-ms-transform': '',
            '-webkit-transform': '',
            'transform': ''
        });

        if (focus) this.updateFocus(this.focus);
    },

    updatePos: function(pos) {
        this.pos = pos;
        this.container.css({
            '-ms-transform': 'translateX('+pos+'px)',
            '-webkit-transform': 'translateX('+pos+'px)',
            'transform': 'translateX('+pos+'px)'
        });
    },

    updateFocus: function(idx, dir) {

        if (!this.active) {
            return;
        }

        dir = dir || (idx > this.focus ? 1:-1);

        var item = this.items.eq(idx), area, i;

        if (this.options.infinite) {
            this.infinite(idx, dir);
        }

        if (this.options.center) {

            this.updatePos(item.data('center')*-1);

            this.items.filter('.'+this.options.activecls).removeClass(this.options.activecls);
            item.addClass(this.options.activecls);

        } else {

            if (this.options.infinite) {

                this.updatePos(item.data('left')*-1);

            } else {

                area = 0;

                for (i=idx;i<this.items.length;i++) {
                    area += this.items.eq(i).data('width');
                }

                if (area > this.vp) {

                    this.updatePos(item.data('left')*-1);

                } else {

                    if (dir == 1) {

                        area = 0;

                        for (i=this.items.length-1;i>=0;i--) {

                            area += this.items.eq(i).data('width');

                            if (area == this.vp) {
                                idx = i;
                                break;
                            }

                            if (area > this.vp) {
                                idx = (i < this.items.length-1) ? i+1 : i;
                                break;
                            }
                        }

                        if (area > this.vp) {
                            this.updatePos((this.container.width() - this.vp) * -1);
                        } else {
                            this.updatePos(this.items.eq(idx).data('left')*-1);
                        }
                    }
                }
            }
        }

        // mark elements
        var left = this.items.eq(idx).data('left');

        this.items.removeClass('uk-slide-before uk-slide-after').each(function(i){
            if (i!==idx) {
                UI.$(this).addClass(UI.$(this).data('left') < left ? 'uk-slide-before':'uk-slide-after');
            }
        });

        this.focus = idx;

        this.trigger('focusitem.uk.slider', [idx,this.items.eq(idx),this]);
    },

    next: function() {

        var focus = this.items[this.focus + 1] ? (this.focus + 1) : (this.options.infinite ? 0:this.focus);

        this.updateFocus(focus, 1);
    },

    previous: function() {

        var focus = this.items[this.focus - 1] ? (this.focus - 1) : (this.options.infinite ? (this.items[this.focus - 1] ? this.items-1:this.items.length-1):this.focus);

        this.updateFocus(focus, -1);
    },

    start: function() {

        this.stop();

        var $this = this;

        this.interval = setInterval(function() {
            if (!$this.hovering) $this.next();
        }, this.options.autoplayInterval);

    },

    stop: function() {
        if (this.interval) clearInterval(this.interval);
    },

    infinite: function(baseidx, direction) {

        var $this = this, item = this.items.eq(baseidx), i, z = baseidx, move = [], area = 0;

        if (direction == 1) {

            for (i=0;i<this.items.length;i++) {

                if (z != baseidx) {
                    area += this.items.eq(z).data('width');
                    move.push(this.items.eq(z));
                }

                if (area > this.vp) {
                    break;
                }

                z = z+1 == this.items.length ? 0:z+1;
            }

            if (move.length) {

                move.forEach(function(itm){

                    var left = item.data('area');

                    itm.css({'left': left}).data({
                        left  : left,
                        area  : (left+itm.data('width')),
                        center: (left - ($this.vp/2 - itm.data('cwidth')/2))
                    });

                    item = itm;
                });
            }

        } else {

            for (i=this.items.length-1;i >-1 ;i--) {

                area += this.items.eq(z).data('width');

                if (z != baseidx) {
                    move.push(this.items.eq(z));
                }

                if (area > this.vp) {
                    break;
                }

                z = z-1 == -1 ? this.items.length-1:z-1;
            }

            if (move.length) {

                move.forEach(function(itm){

                    var left = item.data('left') - itm.data('width');

                    itm.css({'left': left}).data({
                        left  : left,
                        area  : (left+itm.data('width')),
                        center: (left - ($this.vp/2 - itm.data('cwidth')/2))
                    });

                    item = itm;
                });
            }
        }
    }
});

// handle dragging
UI.$doc.on('mousemove.uk.slider touchmove.uk.slider', function(e) {

    if (e.originalEvent && e.originalEvent.touches) {
        e = e.originalEvent.touches[0];
    }

    if (delayIdle && Math.abs(e.pageX - delayIdle.x) > delayIdle.threshold) {

        if (!window.getSelection().toString()) {
            delayIdle(e);
        } else {
            dragging = delayIdle = false;
        }
    }

    if (!dragging) {
        return;
    }

    var x, xDiff, pos, dir, focus, item, next, diff, i, z, itm;

    if (e.clientX || e.clientY) {
        x = e.clientX;
    } else if (e.pageX || e.pageY) {
        x = e.pageX - document.body.scrollLeft - document.documentElement.scrollLeft;
    }

    focus = store.focus;
    xDiff = x - dragging.element.data('pointer-start').x;
    pos   = dragging.element.data('pointer-pos-start') + xDiff;
    dir   = x > dragging.element.data('pointer-start').x ? -1:1;
    item  = dragging.items.eq(store.focus);

    if (dir == 1) {

        diff = item.data('left') + Math.abs(xDiff);

        for (i=0,z=store.focus;i<dragging.items.length;i++) {

            itm = dragging.items.eq(z);

            if (z != store.focus && itm.data('left') < diff && itm.data('area') > diff) {
                focus = z;
                break;
            }

            z = z+1 == dragging.items.length ? 0:z+1;
        }

    } else {

        diff = item.data('left') - Math.abs(xDiff);

        for (i=0,z=store.focus;i<dragging.items.length;i++) {

            itm = dragging.items.eq(z);

            if (z != store.focus && itm.data('area') <= item.data('left') && itm.data('center') < diff) {
                focus = z;
                break;
            }

            z = z-1 == -1 ? dragging.items.length-1:z-1;
        }
    }

    if (dragging.options.infinite && focus!=store._focus) {
        dragging.infinite(focus, dir);
    }

    dragging.updatePos(pos);

    store.dir     = dir;
    store._focus  = focus;
    store.touchx  = parseInt(e.pageX, 10);
    store.diff    = diff;
});

UI.$doc.on('mouseup.uk.slider touchend.uk.slider', function(e) {

    if (dragging) {

        dragging.container.removeClass('uk-drag');

        // TODO is this needed?
        dragging.items.eq(store.focus);

        var itm, focus = false, i, z;

        if (store.dir == 1) {

            for (i=0,z=store.focus;i<dragging.items.length;i++) {

                itm = dragging.items.eq(z);

                if (z != store.focus && itm.data('left') > store.diff) {
                    focus = z;
                    break;
                }

                z = z+1 == dragging.items.length ? 0:z+1;
            }
            if (!dragging.options.infinite && !focus) {
                focus = dragging.items.length;
            }

        } else {

            for (i=0,z=store.focus;i<dragging.items.length;i++) {

                itm = dragging.items.eq(z);

                if (z != store.focus && itm.data('left') < store.diff) {
                    focus = z;
                    break;
                }

                z = z-1 == -1 ? dragging.items.length-1:z-1;
            }
            if (!dragging.options.infinite && !focus) {
                focus = 0
            }
        }

        dragging.updateFocus(focus!==false ? focus:store._focus);

    }

    dragging = delayIdle = false;
});

return UI.slider;

});