/**
 * Time-To jQuery plug-in
 * Show countdown timer or realtime clock
 *
 * @author Alexey Teterin <altmoc@gmail.com>
 * @version 1.2.1
 * @license MIT http://opensource.org/licenses/MIT
 * @date 2017-07-31
 */

(function (factory) {
    if (typeof define === 'function' && define.amd) {
        // AMD (RequireJS)
        define(['jquery'], factory);
    } else if (typeof exports === 'object') {
        // CommonJS (Node)
        module.exports = factory(require('jquery'));
    } else {
        // globals
        factory(jQuery);
    }
}(function ($) {
    var SECONDS_PER_DAY = 86400;
    var SECONDS_PER_HOUR = 3600;

    var defaults = {
        callback: null,          // callback function for exec when timer out
        captionSize: 0,          // font-size by pixels for captions, if 0 then calculate automaticaly
        countdown: true,         // is countdown or real clock
        countdownAlertLimit: 10, // limit in seconds when display red background
        displayCaptions: false,  // display captions under digit groups
        displayDays: 0,          // display day timer, count of days digits
        displayHours: true,      // display hours
        fontFamily: 'Verdana, sans-serif',
        fontSize: 0,             // font-size of a digit by pixels (0 - use CSS instead)
        lang: 'en',              // language of caption
        languages: {},           // extra or overridden languages
        seconds: 0,              // timer's countdown value in seconds
        start: true,             // true to start timer immediately
        theme: 'white',          // 'white' or 'black' theme fo timer's view

        width: 25,               // width of a digit area
        height: 30,              // height of a digit area
        gap: 11,                 // gap size between numbers
        vals: [0, 0, 0, 0, 0, 0, 0, 0, 0],  // private, current value of each digit
        limits: [9, 9, 9, 2, 9, 5, 9, 5, 9], // private, max value of each digit
        iSec: 8,                 // private, index of second digit
        iHour: 4,                // private, index of hour digit
        tickTimeout: 1000,       // timeout betweet each timer tick in miliseconds
        intervalId: null         // private
    };

    var methods = {
        start: function (sec) {
            var intervalId;

            if (sec) {
                init.call(this, sec);
                intervalId = setTimeout(tick.bind(this), 1000);

                // save start time
                this.data('ttStartTime', $.now());
                this.data('intervalId', intervalId);
            }
        },

        stop: function () {
            var data = this.data();

            if (data.intervalId) {
                clearTimeout(data.intervalId);
                this.data('intervalId', null);
            }
            return data;
        },

        reset: function (sec) {
            var data = methods.stop.call(this);
            var secs = typeof sec === 'undefined' ? data.seconds : sec;

            this.find('div').css({ backgroundPosition: 'left center' });
            this.find('ul').parent().removeClass('timeTo-alert');

            init.call(this, secs, true);
        }
    };

    /* eslint-disable no-multi-spaces */

    var dictionary = {
        en: { days: 'days',   hours: 'hours',  min: 'minutes',  sec: 'seconds' },
        ru: { days: 'дней',   hours: 'часов',  min: 'минут',    sec: 'секунд' },
        ua: { days: 'днiв',   hours: 'годин',  min: 'хвилин',   sec: 'секунд' },
        de: { days: 'Tag',    hours: 'Uhr',    min: 'Minuten',  sec: 'Secunden' },
        fr: { days: 'jours',  hours: 'heures', min: 'minutes',  sec: 'secondes' },
        sp: { days: 'días',   hours: 'horas',  min: 'minutos',  sec: 'segundos' },
        it: { days: 'giorni', hours: 'ore',    min: 'minuti',   sec: 'secondi' },
        nl: { days: 'dagen',  hours: 'uren',   min: 'minuten',  sec: 'seconden' },
        no: { days: 'dager',  hours: 'timer',  min: 'minutter', sec: 'sekunder' },
        pt: { days: 'dias',   hours: 'horas',  min: 'minutos',  sec: 'segundos' },
        tr: { days: 'gün',    hours: 'saat',   min: 'dakika',   sec: 'saniye' }
    };

    /* eslint-enable no-multi-spaces */

    if (typeof $.support.transition === 'undefined') {
        $.support.transition = (function () {
            var thisBody = document.body || document.documentElement;
            var thisStyle = thisBody.style;
            var support = thisStyle.transition !== undefined
                || thisStyle.WebkitTransition !== undefined
                || thisStyle.MozTransition !== undefined
                || thisStyle.MsTransition !== undefined
                || thisStyle.OTransition !== undefined;

            return support;
        }());
    }

    $.fn.timeTo = function () {
        var options = {};
        var now = $.now();
        var j, arg, num, method, time, days, tt, sec, m, t;

        for (j = 0; j < arguments.length; j += 1) {
            arg = arguments[j];
            if (j === 0 && typeof arg === 'string') {
                method = arg;
            } else if (typeof arg === 'object') {
                if (typeof arg.getTime === 'function') {
                    // arg is a Date object
                    options.timeTo = arg;
                } else {
                    // arg is an options object
                    options = $.extend(options, arg);
                }
            } else if (typeof arg === 'function') {
                // arg is callback
                options.callback = arg;
            } else {
                num = parseInt(arg, 10);
                // arg is seconds of timeout
                if (!isNaN(num)) {
                    options.seconds = num;
                }
            }
        }

        // set time to countdown to
        if (options.timeTo) {
            if (options.timeTo.getTime) {
                // set time as date object
                time = options.timeTo.getTime();
            } else if (typeof options.timeTo === 'number') {
                // set time as integer in millisec
                time = options.timeTo;
            }
            if (time > now) {
                options.seconds = Math.floor((time - now) / 1000);
            } else {
                options.seconds = 0;
            }
        } else if (options.time || !options.seconds) {
            time = options.time;

            if (!time) {
                time = new Date();
            }

            if (typeof time === 'object' && time.getTime) {
                options.seconds = (time.getHours() * SECONDS_PER_HOUR) + (time.getMinutes() * 60) + time.getSeconds();
                options.countdown = false;
            } else if (typeof time === 'string') {
                tt = time.split(':');
                sec = 0;
                m = 1;

                while (tt.length) {
                    t = tt.pop();
                    sec += t * m;
                    m *= 60;
                }
                options.seconds = sec;
                options.countdown = false;
            }
        }

        if (options.countdown !== false
                && options.seconds > SECONDS_PER_DAY
                && typeof options.displayDays === 'undefined') {
            days = Math.floor(options.seconds / SECONDS_PER_DAY);
            options.displayDays = (days < 10 && 1) || (days < 100 && 2) || 3;
        } else if (options.displayDays === true) {
            options.displayDays = 3;
        } else if (options.displayDays) {
            options.displayDays = options.displayDays > 0 ? Math.floor(options.displayDays) : 3;
        }

        return this.each(function () {
            var $this = $(this);
            var data = $this.data();
            var defs, opt, i, css, language, left, ulhtml, style, dhtml1, dhtml2, dot2, maxWidth,
                captionSize, fsStyleVal, fsStyle, thtml, marginRight, dhtml, $digits, dif, vals, limits;

            if (data.intervalId) {
                clearInterval(data.intervalId);
                data.intervalId = null;
            }

            if (!data.vals) {
                // new clock
                if (data.opt) {
                    opt = data.options;
                } else {
                    opt = options;
                }

                // clone the defaults object
                defs = Object.keys(defaults).reduce(function (obj, key) {
                    if (Array.isArray(defaults[key])) {
                        obj[key] = defaults[key].slice(0);
                    } else {
                        obj[key] = defaults[key];
                    }
                    return obj;
                }, {});

                data = $.extend(defs, opt);
                data.options = opt;

                data.height = Math.round((data.fontSize * 100) / 93) || data.height;
                data.width = Math.round((data.fontSize * 0.8) + (data.height * 0.13)) || data.width;
                data.displayHours = !!(data.displayDays || data.displayHours);

                css = {
                    fontFamily: data.fontFamily
                };
                if (data.fontSize > 0) {
                    css.fontSize = data.fontSize + 'px';
                }
                language = data.languages[data.lang] || dictionary[data.lang];

                $this
                    .addClass('timeTo')
                    .addClass('timeTo-' + data.theme)
                    .css(css);

                left = Math.round(data.height / 10);
                ulhtml = '<ul style="left:' + left + 'px; top:-' + data.height + 'px"><li>0</li><li>0</li></ul></div>';
                style = data.fontSize
                    ? ' style="width:' + data.width + 'px; height:' + data.height + 'px;"'
                    : ' style=""';
                dhtml1 = '<div class="first"' + style + '>' + ulhtml;
                dhtml2 = '<div' + style + '>' + ulhtml;
                dot2 = '<span>:</span>';
                maxWidth = Math.round((data.width * 2) + 3);
                captionSize = data.captionSize || (data.fontSize && Math.round(data.fontSize * 0.43));
                fsStyleVal = captionSize ? 'font-size:' + captionSize + 'px;' : '';
                fsStyle = captionSize ? ' style="' + fsStyleVal + '"' : '';

                thtml = (data.displayCaptions
                    ? (data.displayHours
                            ? '<figure style="max-width:' + maxWidth + 'px">$1<figcaption' + fsStyle + '>'
                                + language.hours + '</figcaption></figure>' + dot2
                            : '')
                        + '<figure style="max-width:' + maxWidth + 'px">$1<figcaption' + fsStyle + '>' + language.min
                        + '</figcaption></figure>' + dot2
                        + '<figure style="max-width:' + maxWidth + 'px">$1<figcaption' + fsStyle + '>' + language.sec
                        + '</figcaption></figure>'
                    : (data.displayHours ? '$1' + dot2 : '') + '$1' + dot2 + '$1'
                ).replace(/\$1/g, dhtml1 + dhtml2);

                if (data.displayDays > 0) {
                    marginRight = data.fontSize * 0.4 || defaults.gap;
                    dhtml = dhtml1;

                    for (i = data.displayDays - 1; i > 0; i -= 1) {
                        dhtml += i === 1
                            ? dhtml2.replace('">', 'margin-right:' + Math.round(marginRight) + 'px">')
                            : dhtml2;
                    }
                    thtml = (data.displayCaptions
                        ? '<figure style="width:' + Math.round((data.width * data.displayDays) + marginRight + 4) + 'px">$1'
                            + '<figcaption style="' + fsStyleVal + 'padding-right:' + Math.round(marginRight) + 'px">'
                            + language.days + '</figcaption></figure>'
                        : '$1').replace(
                            /\$1/, dhtml
                        ) + thtml;
                }
                $this.html(thtml);
            } else if (method !== 'reset') {
                // exists clock
                $.extend(data, options);
            }

            $digits = $this.find('div');

            if ($digits.length < data.vals.length) {
                dif = data.vals.length - $digits.length;
                vals = data.vals;
                limits = data.limits;

                data.vals = [];
                data.limits = [];
                for (i = 0; i < $digits.length; i += 1) {
                    data.vals[i] = vals[dif + i];
                    data.limits[i] = limits[dif + i];
                }
                data.iSec = data.vals.length - 1;
                data.iHour = data.vals.length - 5;
            }
            data.sec = data.seconds;
            $this.data(data);

            if (method && methods[method]) {
                methods[method].call($this, data.seconds);
            } else if (data.start) {
                methods.start.call($this, data.seconds);
            } else {
                init.call($this, data.seconds);
            }
        });
    };


    function init(sec, force) {
        var data = this.data();
        var $digits = this.find('ul');
        var isInterval = false;
        var days, rest, hours, minutes, secs, str, i, j, val;

        if (!data.vals || $digits.length === 0) {
            return;
        }

        if (!sec) {
            sec = data.seconds;
        }

        if (data.intervalId) {
            isInterval = true;
            clearTimeout(data.intervalId);
        }

        days = Math.floor(sec / SECONDS_PER_DAY);
        rest = days * SECONDS_PER_DAY;
        hours = Math.floor((sec - rest) / SECONDS_PER_HOUR);

        rest += hours * SECONDS_PER_HOUR;

        minutes = Math.floor((sec - rest) / 60);

        rest += minutes * 60;

        secs = sec - rest;
        str = (days < 100 ? '0' + (days < 10 ? '0' : '') : '')
            + days + (hours < 10 ? '0' : '') + hours + (minutes < 10 ? '0' : '')
            + minutes + (secs < 10 ? '0' : '') + secs;

        for (i = data.vals.length - 1, j = str.length - 1; i >= 0; i -= 1, j -= 1) {
            val = parseInt(str.substr(j, 1), 10);
            data.vals[i] = val;
            $digits.eq(i).children().html(val);
        }
        if (isInterval || force) {
            data.ttStartTime = $.now();
            data.intervalId = setTimeout(tick.bind(this), 1000);
            this.data('intervalId', data.intervalId);
        }
    }

    /**
     * Switch specified digit by digit index
     * @param {number} - digit index
     */
    function tick(digit) {
        var me = this;
        var $digits = this.find('ul');
        var data = this.data();
        var n, $ul, $li, step, tickTimeout, timeDiff;

        if (!data.vals || $digits.length === 0) {
            if (data.intervalId) {
                clearTimeout(data.intervalId);
                this.data('intervalId', null);
            }
            if (data.callback) {
                data.callback();
            }
            return;
        }
        if (typeof digit === 'undefined') {
            digit = data.iSec;
        }

        n = data.vals[digit];
        $ul = $digits.eq(digit);
        $li = $ul.children();
        step = data.countdown ? -1 : 1;

        $li.eq(1).html(n);
        n += step;

        if (digit === data.iSec) {
            tickTimeout = data.tickTimeout;
            timeDiff = $.now() - data.ttStartTime;

            data.sec += step;

            tickTimeout += (Math.abs(data.seconds - data.sec) * tickTimeout) - timeDiff;

            data.intervalId = setTimeout(tick.bind(this), tickTimeout);
        }

        if (n < 0 || n > data.limits[digit]) {
            if (n < 0) {
                n = data.limits[digit];
                // fix for hours when day changing
                if (digit === data.iHour
                        && data.displayDays > 0
                        && data.vals[digit - 1] === 0) {
                    n = 3;
                }
            } else {
                n = 0;
            }

            if (digit > 0) {
                tick.call(this, digit - 1);
            }
        }
		// fix for hours when day changing in clock mode
		else if (!data.countdown
				&& digit === data.iHour
				&& data.displayDays > 0
				&& data.vals[digit - 1] === 2 && data.vals[digit] === 3) {
			n = 0;
			tick.call(this, digit - 1);
		}
        $li.eq(0).html(n);

        if ($.support.transition) {
            $ul.addClass('transition');
            $ul.css({ top: 0 });

            setTimeout(function () {
                $ul.removeClass('transition');
                $li.eq(1).html(n);
                $ul.css({ top: '-' + data.height + 'px' });

                if (step > 0 || digit !== data.iSec) {
                    return;
                }

                if (data.sec === data.countdownAlertLimit) {
                    $digits.parent().addClass('timeTo-alert');
                }

                if (data.sec === 0) {
                    $digits.parent().removeClass('timeTo-alert');

                    if (data.intervalId) {
                        clearTimeout(data.intervalId);
                        me.data('intervalId', null);
                    }

                    if (typeof data.callback === 'function') {
                        data.callback();
                    }
                }
            }, 410);
        } else {
            $ul.stop().animate({ top: 0 }, 400, digit !== data.iSec ? null : function () {
                $li.eq(1).html(n);
                $ul.css({ top: '-' + data.height + 'px' });

                if (step > 0 || digit !== data.iSec) {
                    return;
                }

                if (data.sec === data.countdownAlertLimit) {
                    $digits.parent().addClass('timeTo-alert');
                } else if (data.sec === 0) {
                    $digits.parent().removeClass('timeTo-alert');

                    if (data.intervalId) {
                        clearTimeout(data.intervalId);
                        me.data('intervalId', null);
                    }

                    if (typeof data.callback === 'function') {
                        data.callback();
                    }
                }
            });
        }
        data.vals[digit] = n;
    }

    return $;
}));