'use strict';

define(
    [
        'moment',
        'filesize',
        'Shared/UiSettingsModel'
    ], function (moment, filesize, UiSettings) {

        return {

            bytes: function (sourceSize) {
                var size = Number(sourceSize);

                if (isNaN(size)) {
                    return '';
                }

                return filesize(size, { base: 2, round: 1 });
            },

            relativeDate: function (sourceDate) {
                if (!sourceDate) {
                    return '';
                }

                var date = moment(sourceDate);
                var calendarDate = date.calendar();

                //TODO: It would be nice to not have to hack this...
                var strippedCalendarDate = calendarDate.substring(0, calendarDate.indexOf(' at '));

                if (strippedCalendarDate){
                    return strippedCalendarDate;
                }

                if (date.isAfter(moment())) {
                    return date.fromNow(true);
                }

                if (date.isBefore(moment().add('years', -1))) {
                    return date.format(UiSettings.get('shortDateFormat'));
                }

                return date.fromNow();
            },

            pad: function (n, width, z) {
                z = z || '0';
                n = n + '';
                return n.length >= width ? n : new Array(width - n.length + 1).join(z) + n;
            },

            number: function (input) {
                if (!input) {
                    return '0';
                }

                return input.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
            }
        };
    });