/*
 * Metadata - jQuery countdown plugin
 * http://alexmuz.ru/jquery-countdown/
 *
 * Copyright (c) 2009 Alexander Muzychenko
 *
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 */

(function ($) {
    $.fn.countdown = function (options) {
        options = $.extend({
            lang: {
                years: [' год ', 'года ', ' лет '],
                months: [' месяц ', ' месяца ', ' месяцев '],
                days: [' день ', ' дня ', ' дней '],
                hours: [':', ':', ':'],
                minutes: [':', ':', ':'],
                seconds: ['', '', ''],
                plurar: function (n) {
                    return (n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);
                }
            },
            prefix: "Осталось: ",
            finish: "Всё"
        }, options);

        var timeDifference = function (begin, end) {
            if (end < begin) {
                return false;
            }
            var diff = {
                seconds: [end.getSeconds() - begin.getSeconds(), 60],
                minutes: [end.getMinutes() - begin.getMinutes(), 60],
                hours: [end.getHours() - begin.getHours(), 24],
                days: [end.getDate() - begin.getDate(), new Date(begin.getYear(), begin.getMonth() + 1, 0).getDate() - 1],
                months: [end.getMonth() - begin.getMonth(), 12],
                years: [end.getYear() - begin.getYear(), 0]
            };
            var result = new Array();
            var flag = false;
            for (i in diff) {
                if (flag) {
                    diff[i][0]--;
                    flag = false;
                }
                if (diff[i][0] < 0) {
                    flag = true;
                    diff[i][0] += diff[i][1];
                }

                if (!diff[i][0] && (i == "days" || i == "months" || i == "years"))
                    continue;

                if (!diff[i][0]) {
                    result.push("00" + options.lang[i][options.lang.plurar(diff[i][0])]);
                    continue;
                }

                var str = diff[i][0].toString();
                if (str.length == 1 && (options.lang[i][0] == ':' || options.lang[i][0] == ''))
                    str = "0" + str;
                if (str.length == 0)
                    str = "00";

                result.push(str + options.lang[i][options.lang.plurar(diff[i][0])]);
            }

            return result.reverse().join('');
        };
        var elem = $(this);
        var timeUpdate = function () {
            var s = timeDifference(new Date(), new Date(elem.attr("date")));
            if (s.length) {
                if (s.length === 1)
                    s = "0" + s;
                elem.html(s);
            } else {
                clearInterval(timer);

                elem.html('Действие акции закончилось.');
                elem.parent().children(".endTime").hide();
            }
        };
        timeUpdate();
        var timer = setInterval(timeUpdate, 1000);
    };
})(jQuery);