// Модуль для работы с датами

let GMT_offset = 0;

module.exports = {
    setGMT: function(offset) {
        GMT_offset = offset;
        console.log('Установлен часовой пояс GMT+' + offset);
    },
    
    getGMT: function() {
        return GMT_offset;
    },
    
    now: function() {
        const now = new Date();
        return new Date(now.getTime() + GMT_offset * 60 * 60 * 1000);
    },
    
    format: function(date, format = 'YYYY-MM-DD HH:mm:ss') {
        const d = date || this.now();
        
        const year = d.getFullYear();
        const month = String(d.getMonth() + 1).padStart(2, '0');
        const day = String(d.getDate()).padStart(2, '0');
        const hours = String(d.getHours()).padStart(2, '0');
        const minutes = String(d.getMinutes()).padStart(2, '0');
        const seconds = String(d.getSeconds()).padStart(2, '0');
        
        return format
            .replace('YYYY', year)
            .replace('MM', month)
            .replace('DD', day)
            .replace('HH', hours)
            .replace('mm', minutes)
            .replace('ss', seconds);
    }
};