/**
 * simplyScroll 2 - a scroll-tastic jQuery plugin
 *
 * http://logicbox.net/jquery/simplyscroll/
 *
 * Copyright (c) 2009-2018 Will Kelly - http://logicbox.net
 *
 * @license MIT
 *
 */

(function(factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        module.exports = factory(require("jquery"), window, document);
    } else {
        factory(jQuery, window, document);
    }
}(function($, window, document, undefined) {

    $.fn.simplyScroll = function(options) {
        return this.each(function() {
            // check to see if already attached to element
            if (typeof $(this).data('simplyScroll') === "undefined") {
                // access  methods and properties like
                // element.data('simplyScroll').method(arg1, arg2, ...)
                var simplyScroll = new $.simplyScroll(this, options);
                $(this).data('simplyScroll', simplyScroll);
            }
        });
    };

    var defaults = {
        customClass: 'simply-scroll',
        frameRate: 24, //No of movements per second
        speed: 1, //Intended no. of pixels per frame (/w scroller size & requestAnimationFrame this may not be honoured)
        orientation: 'horizontal', //'horizontal or 'vertical' - not to be confused with device orientation
        auto: true,
        autoMode: 'loop', //if auto == true, use 'loop' or 'bounce',
        manualMode: 'loop', //if auto == false, use 'loop' or 'end'
        direction: 'forwards', //'forwards' or 'backwards'.
        pauseOnHover: true, //if autoMode == loop || bounce only
        pauseOnTouch: false, //" touch device only - 하라고 ul영역에서 스크롤 안되는 문제때문에 true->false 변경
        pauseButton: false, //" generates an extra element to allow manual pausing
        startOnLoad: false, //use this to delay starting of plugin until all page assets have loaded
        initialOffset: 0
    };

    $.simplyScroll = function(el, options) {

        var self = this;

        this.o = $.extend({}, defaults, options || {});
        this.isAuto = this.o.auto !== false && this.o.autoMode.match(/^loop|bounce$/) !== null;
        this.isHorizontal =
            this.o.orientation.match(/^horizontal|vertical$/) !== null && this.o.orientation === defaults.orientation;
        this.isRTL = this.isHorizontal && $("html").attr('dir') === 'rtl';
        this.isForwards = !this.isAuto && !this.isRTL ||
            (this.isAuto && this.o.direction.match(/^forwards|backwards$/) !== null && this.o.direction === defaults.direction);
        this.isLoop = this.isAuto && this.o.autoMode === 'loop' || !this.isAuto && this.o.manualMode === 'loop';

        this.supportsTouch = ('createTouch' in document);

        this.events = this.supportsTouch ? {
            start: 'touchstart MozTouchDown',
            move: 'touchmove MozTouchMove',
            end: 'touchend touchcancel MozTouchRelease'
        } : {
            start: 'mouseenter',
            end: 'mouseleave'
        };

        this.$list = $(el); //called on ul/ol/div etc
        var $items = this.$list.children();

        //generate extra markup
        this.$list.addClass('simply-scroll-list')
            .wrap('<div class="simply-scroll-clip"></div>')
            .parent().wrap('<div class="' + this.o.customClass + ' simply-scroll-container"></div>');

        if (!this.isAuto) { //button placeholders
            this.$list.parent().parent()
                .prepend('<div class="simply-scroll-forward"></div>')
                .prepend('<div class="simply-scroll-back"></div>');
        } else {
            if (this.o.pauseButton) {
                this.$list.parent().parent()
                    .prepend('<div class="simply-scroll-btn simply-scroll-btn-pause"></div>');
                this.o.pauseOnHover = false;
            }
        }

        //wrap an extra div around the whole lot if elements scrolled aren't equal
        if ($items.length > 1) {
            var extra_wrap = false,
                total = 0;

            if (this.isHorizontal) {
                $items.each(function() {
                    total += $(this).outerWidth(true);
                });
                extra_wrap = $items.eq(0).outerWidth(true) * $items.length !== total;
            } else {
                $items.each(function() {
                    total += $(this).outerHeight(true);
                });
                extra_wrap = $items.eq(0).outerHeight(true) * $items.length !== total;
            }

            // 하라고 리뷰에서 안드로이드 ul 태그 2개 생겨서 값 고정
            extra_wrap = false;

            if (extra_wrap) {
                this.$list = this.$list.wrap('<div></div>').parent().addClass('simply-scroll-list');
                if (this.isHorizontal) {
                    this.$list.children().css({
                        "float": 'left',
                        width: total + 'px'
                    });
                } else {
                    this.$list.children().css({
                        height: total + 'px'
                    });
                }
            }
        }

        if (!this.o.startOnLoad) {
            this.init();
        } else {
            //wait for load before completing setup
            $(window).load(function() {
                self.init();
            });
        }

    };

    $.simplyScroll.fn = $.simplyScroll.prototype = {};

    $.simplyScroll.fn.extend = $.extend;

    $.simplyScroll.fn.extend({
        init: function() {
            var self = this;

            this.$items = this.$list.children();
            this.$clip = this.$list.parent(); //this is the element that scrolls
            this.$container = this.$clip.parent();
            this.$btnBack = $('.simply-scroll-back', this.$container);
            this.$btnForward = $('.simply-scroll-forward', this.$container);

            if (!this.isHorizontal) {
                this.itemMax = this.$items.eq(0).outerHeight(true);
                this.clipMax = this.$clip.height();
                this.dimension = 'height';
                this.moveBackClass = 'simply-scroll-btn-up';
                this.moveForwardClass = 'simply-scroll-btn-down';
                this.scrollPos = 'Top';
            } else {
                this.itemMax = this.$items.eq(0).outerWidth(true);
                this.clipMax = this.$clip.width();
                this.dimension = 'width';
                this.moveBackClass = 'simply-scroll-btn-left';
                this.moveForwardClass = 'simply-scroll-btn-right';
                this.scrollPos = 'Left';
            }

            this.posMin = 0;

            this.posMax = this.$items.length * this.itemMax;

            var addItems = Math.ceil(this.clipMax / this.itemMax);

            //auto scroll loop & manual scroll bounce or end(to-end)
            if (this.isAuto && this.o.autoMode === 'loop') {

                this.$list.css(this.dimension, this.posMax + (this.itemMax * addItems) + 'px');

                this.posMax += (this.clipMax - this.o.speed);

                if (this.isForwards) {
                    this.$items.slice(0, addItems).clone(true).appendTo(this.$list);
                    this.resetPosition = 0;

                } else {
                    this.$items.slice(-addItems).clone(true).prependTo(this.$list);
                    this.resetPosition = this.$items.length * this.itemMax;
                    //due to inconsistent RTL implementation force back to LTR then fake
                    if (this.isRTL) {
                        this.$clip[0].dir = 'ltr';
                        //based on feedback seems a good idea to force float right
                        this.$items.css('float', 'right');
                    }
                }

                //manual and loop
            } else if (!this.isAuto && this.o.manualMode === 'loop') {

                this.posMax += this.itemMax * addItems;

                this.$list.css(this.dimension, this.posMax + (this.itemMax * addItems) + 'px');

                this.posMax += (this.clipMax - this.o.speed);

                this.$items.slice(0, addItems).clone(true).appendTo(this.$list);
                this.$items.slice(-addItems).clone(true).prependTo(this.$list);

                this.resetPositionForwards = this.resetPosition = addItems * this.itemMax;
                this.resetPositionBackwards = this.$items.length * this.itemMax;

                //extra events to force scroll direction change
                this.$btnBack.bind(this.events.start, function() {
                    self.isForwards = false;
                    self.resetPosition = self.resetPositionBackwards;
                });

                this.$btnForward.bind(this.events.start, function() {
                    self.isForwards = true;
                    self.resetPosition = self.resetPositionForwards;
                });

            } else { //(!this.isAuto && this.o.manualMode=='end')

                this.$list.css(this.dimension, this.posMax + 'px');

                if (this.isForwards) {
                    this.resetPosition = 0;

                } else {
                    this.resetPosition = this.$items.length * this.itemMax;
                    //due to inconsistent RTL implementation force back to LTR then fake
                    if (this.isRTL) {
                        this.$clip[0].dir = 'ltr';
                        //based on feedback seems a good idea to force float right
                        this.$items.css('float', 'right');
                    }
                }
            }

            this.resetPos(this.o.initialOffset); //ensure scroll position is reset

            this.timestamp = null;
            this.interval = null;

            if (!(!this.isAuto && this.o.manualMode === 'end')) { //loop mode
                //ensure that speed is divisible by item width. Helps to always make images even not odd widths!
                while (this.itemMax % this.o.speed !== 0) {
                    this.o.speed--;
                    if (this.o.speed === 0) {
                        this.o.speed = 1;
                        break;
                    }
                }
            }

            this.trigger = null;

            this.funcMoveBack = function(e) {
                if (e !== undefined) {
                    e.preventDefault();
                }
                self.trigger = !self.isAuto && self.o.manualMode === 'end' ? this : null;
                if (self.isAuto) {
                    self.isForwards ? self.moveBack() : self.moveForward();
                } else {
                    self.moveBack();
                }
            };

            this.funcMoveForward = function(e) {
                if (e !== undefined) {
                    e.preventDefault();
                }
                self.trigger = !self.isAuto && self.o.manualMode === 'end' ? this : null;
                if (self.isAuto) {
                    self.isForwards ? self.moveForward() : self.moveBack();
                } else {
                    self.moveForward();
                }
            };

            this.funcMovePause = function() {
                self.movePause();
            };
            this.funcMoveStop = function() {
                self.moveStop();
            };
            this.funcMoveResume = function() {
                self.moveResume();
            };

            if (this.isAuto) {

                this.paused = false;

                function togglePause() {
                    if (self.paused === false) {
                        self.paused = true;
                        self.funcMovePause();
                    } else {
                        self.paused = false;
                        self.funcMoveResume();
                    }
                    return self.paused;
                }

                //disable pauseTouch when links are present
                if (this.supportsTouch && this.$items.find('a').length) {
                    this.supportsTouch = false;
                }

                if (this.isAuto && this.o.pauseOnHover && !this.supportsTouch) {
                    this.$clip
                        .bind(this.events.start, this.funcMovePause)
                        .bind(this.events.end, this.funcMoveResume);
                } else if (this.isAuto && this.o.pauseOnTouch && !this.o.pauseButton && this.supportsTouch) {

                    var touchStartPos, scrollStartPos;

                    this.$clip.bind(this.events.start, function(e) {
                        togglePause();
                        var touch = e.originalEvent.touches[0];
                        touchStartPos = self.isHorizontal ? touch.pageX : touch.pageY;
                        scrollStartPos = self.$clip[0]['scroll' + self.scrollPos];
                        e.stopPropagation();
                        e.preventDefault();

                    }).bind(this.events.move, function(e) {

                        e.stopPropagation();
                        e.preventDefault();

                        var touch = e.originalEvent.touches[0],
                            endTouchPos = self.isHorizontal ? touch.pageX : touch.pageY,
                            pos = (touchStartPos - endTouchPos) + scrollStartPos;

                        if (pos < 0) pos = 0;
                        else if (pos > self.posMax) pos = self.posMax;

                        self.$clip[0]['scroll' + self.scrollPos] = pos;

                        //force pause
                        self.funcMovePause();
                        self.paused = true;
                    });
                } else {
                    if (this.o.pauseButton) {

                        this.$btnPause = $(".simply-scroll-btn-pause", this.$container)
                            .bind('click', function(e) {
                                e.preventDefault();
                                togglePause() ? $(this).addClass('active') : $(this).removeClass('active');
                            });
                    }
                }
                this.funcMoveForward();
            } else {

                this.$btnBack
                    .addClass('simply-scroll-btn' + ' ' + this.moveBackClass)
                    .bind(this.events.start, this.funcMoveBack)
                    .bind(this.events.end, this.funcMoveStop);
                this.$btnForward
                    .addClass('simply-scroll-btn' + ' ' + this.moveForwardClass)
                    .bind(this.events.start, this.funcMoveForward)
                    .bind(this.events.end, this.funcMoveStop);

                if (this.o.manualMode === 'end') {
                    !this.isRTL ? this.$btnBack.addClass('disabled') : this.$btnForward.addClass('disabled');
                }
            }
        },

        moveForward: function() {
            var self = this;
            this.movement = 'forward';
            if (this.trigger !== null) {
                this.$btnBack.removeClass('disabled');
            }
            var frame = function(timestamp) {
                if (self.$clip[0]['scroll' + self.scrollPos] < (self.posMax - self.clipMax)) {
                    var delta = (timestamp - (self.timestamp || timestamp)) * self.o.speed / self.o.frameRate;
                    self.$clip[0]['scroll' + self.scrollPos] += Math.ceil(delta); //scroll pos. needs to be an int
                } else if (self.isLoop) {
                    self.resetPos();
                } else {
                    self.moveStop(self.movement);
                }
                self.timestamp = timestamp;
                self.interval = requestAnimationFrame(frame);
            };
            requestAnimationFrame(frame);
        },

        moveBack: function() {
            var self = this;
            this.movement = 'back';
            if (this.trigger !== null) {
                this.$btnForward.removeClass('disabled');
            }
            var frame = function(timestamp) {
                if (self.$clip[0]['scroll' + self.scrollPos] > self.posMin) {
                    var delta = (timestamp - (self.timestamp || timestamp)) * self.o.speed / self.o.frameRate;
                    self.$clip[0]['scroll' + self.scrollPos] -= Math.ceil(delta);
                } else if (self.isLoop) {
                    self.resetPos();
                } else {
                    self.moveStop(self.movement);
                }
                self.timestamp = timestamp;
                self.interval = requestAnimationFrame(frame);
            };
            requestAnimationFrame(frame);
        },

        movePause: function() {
            cancelAnimationFrame(this.interval);
            this.timestamp = null;
        },

        moveStop: function(moveDir) {
            this.movePause();
            this.timestamp = null;
            if (this.trigger !== null) {
                if (typeof moveDir !== 'undefined') {
                    $(this.trigger).addClass('disabled');
                }
                this.trigger = null;
            }
            if (this.isAuto) {
                if (this.o.autoMode === 'bounce') {
                    moveDir === 'forward' ? this.moveBack() : this.moveForward();
                }
            }
        },

        moveResume: function() {
            this.movement === 'forward' ? this.moveForward() : this.moveBack();
        },

        resetPos: function(resetPos) {
            this.$clip[0]['scroll' + this.scrollPos] = resetPos ? resetPos : this.resetPosition;
        }
    });

}));