<?php
/**
 * NOTICE OF LICENSE
 *
 * This file is licenced under the Software License Agreement.
 * With the purchase or the installation of the software in your application
 * you accept the licence agreement.
 *
 * You must not modify, adapt or create derivative works of this source code
 *
 * @author    Musaffar Patel
 * @copyright 2016-2020 Musaffar Patel
 * @license   LICENSE.txt
 */

class DDWDateTimeHelper
{
    /** @var string  */
    private static $route = 'ddwdatetimehelper';

    /** @var array */
    public static $weekday_map = array('sunday', 'monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday');

    /** @var array */
    public static $month_map = array('january', 'february', 'march', 'april', 'may', 'june', 'july', 'august', 'september', 'october', 'november', 'december');

    /**
     * @param $weekday
     * @param $module_instance
     * @return string
     */
    public static function translateWeekday($weekday, $module_instance)
    {
        return $module_instance->l($weekday, 'weekdays');
    }

    /**
     * @param $weekday_index
     * @param $short_form
     * @param $module_instance
     * @return mixed|string
     */
    public static function getWeekdayTranslatedByIndex($weekday_index, $short_form, $module_instance)
    {
        $weekday_name = $module_instance->l(self::$weekday_map[$weekday_index], 'weekdays');
        if ($weekday_name == '') {
            $weekday_name = self::$weekday_map[$weekday_index];
        }

        if ($short_form === true) {
            $weekday_name = Tools::substr($weekday_name, 0, 3);
        }
        return $weekday_name;
    }

    /**
     * @param $month_index
     * @param $short_form
     * @param $module_instance
     * @return mixed|string
     */
    public static function getMonthNameTranslatedByIndex($month_index, $short_form, $module_instance)
    {
        $month_index -= 1;
        $month_name = $module_instance->l(self::$month_map[$month_index], 'months');
        if ($month_name == '') {
            $month_name = self::$month_map[$month_index];
        }
        if ($short_form === true) {
            $month_name = Tools::substr($month_name, 0, 3);
        }
        return $month_name;
    }

    /**
     * Determine if a date time string represents the epoch date time
     * @param $str_datetime
     * @return bool
     */
    public static function isStrDateTimeEpoch($str_datetime)
    {
        if ($str_datetime == '1970-01-01 00:00:00' || $str_datetime == '0000-00-00 00:00:00' || $str_datetime == '1970-01-01') {
            error_log('epoch');
            return true;
        } else {
            return false;
        }
    }

    /**
     * @param $date (YYYY-MM-DD)
     * @return bool
     * @throws Exception
     */
    public static function isDateInPast($date)
    {
        $date = new DateTime($date);
        $now = new DateTime(date('Y-m-d'));

        if ($date < $now) {
            return true;
        }
        return false;
    }

    /**
     * ghet date of the first day of week for the given date
     * @param $date
     * @return string
     */
    public static function getFirstDayOfWeekDate($date)
    {
        $day = DateTime::createFromFormat('Y-m-d', $date);
        $day->setISODate((int)$day->format('o'), (int)$day->format('W'), 1);
        return $day->format('Y-m-d');
    }

    /**
     * return the start date of the week number specified
     * @param $week
     * @param $year
     * @return false|string
     */
    public static function getStartDateByWeekNumber($week, $year)
    {
        $start_Date = date("Y-m-d", strtotime($year . 'W' . str_pad($week, 2, 0, STR_PAD_LEFT)));
        return $start_Date;
    }

    /**
     * get number of weeks 9in a year
     * @param $year
     * @return int
     */
    public static function getNumberOfWeeksInYear($year)
    {
        // december 28th is always in the last week of the year
        return date('W', strtotime($year.'-12-28'));
    }
}