<?php


namespace Hura8\System;


class TimeManager
{

    //convert date from javascript to database
    public static function convert_date_from_javascript($date) {
        //$date : dd-mm-yyyy or dd/mm/yyyy to yyyy-mm-dd
        if (!$date) return "0000-00-00";
        $date = str_replace('/', '-', $date);

        if(!static::is_date($date)) return "0000-00-00";

        list($day, $month, $year) = array_filter(explode("-", $date));

        return  join("-", [$year, $month, $day]);  // $array[2] . "-" . $array[1] . "-" . $array[0];
    }


    // check format dd-mm-yyyy as date
    public static function is_date($date){
        return (preg_match('/[0-9]{1,2}-[0-9]{1,2}-[0-9]{4}/', $date));
    }


    public static function format_date($time) {
        if(!$time || $time == '0000-00-00') return '';

        $today = date("d-m-Y");
        $date_update = date("d-m-Y", strtotime($time));
        if ($today == $date_update) {
            return "Hôm nay";
        }

        return $date_update;
    }

    public static function format_time($time) {
        $today = date("d-m-Y");
        $date_update = date("d-m-Y", strtotime($time));
        $hour_update = date("g:i a", strtotime($time));

        if ($today == $date_update) {
            return "Hôm nay, " . $hour_update;
        }

        return $date_update . ", " . $hour_update;
    }


    /**
     * @param $from_date string dd-mm-YYYY
     * @param $to_date string dd-mm-YYYY
     * @return array [
    [
    "date"  => 'd-m-Y',
    "day"   => 'Mon|Tue|Wed|Thu|Fri|Sat|Sun',
    "date_in_year"  => 'd-m',
    ],
    // ...
    ]
     */
    public static function get_date_range($from_date, $to_date = ''){
        if(!$to_date) $to_date = $from_date;

        $periods = new \DatePeriod(
            new \DateTime(static::reverse_date($from_date)),
            new \DateInterval('P1D'),
            new \DateTime(static::reverse_date($to_date))
        );

        $range = [];
        foreach ($periods as $key => $value) {
            $range[] = [
                "date"  => $value->format('d-m-Y'),
                "day"   => $value->format('D'),
                "date_in_year"  => $value->format('d-m'),
            ];
        }

        $to_date_time = strtotime(static::reverse_date($to_date));
        $range[] = [
            "date"  => $to_date,
            "day"   => date("D", $to_date_time),
            "date_in_year"  => date("d-m", $to_date_time),
        ];

        return $range;
    }


    /**
     * @param $from_date string dd-mm-YYYY
     * @param $to_date string dd-mm-YYYY
     * @return int number of days
     */
    public static function get_day_diff($from_date, $to_date) {
        $now = strtotime(static::reverse_date($to_date));
        $your_date = strtotime(static::reverse_date($from_date));
        $datediff = $now - $your_date;

        return round($datediff / (60 * 60 * 24));
    }

    /**
     * @param $date string dd-mm-YYYY
     * @param $num_days int
     * @return  string dd-mm-YYYY
     */
    public static function add_day($date, $num_days = 1) {
        return date('d-m-Y', strtotime(static::reverse_date($date). ' + '.$num_days.' days'));
    }


    //Reverse date from yyyy-mm-dd to dd-mm-yyyy
    public static function reverse_date($p_date) {

        list($year, $month, $day) = explode("-", $p_date);

        if(!$year || $year == '0000') return '';

        return join("-", [$day, $month, $year]);
    }


    public static function getDateTimeForMySQL() {
        return date("Y-m-d H:i:s");
    }


    /**
     * @description convert date pattern: dd-mm-YYYY H:i to timestamp
     * @param  string $input_date_time dd-mm-YYYY H:i to timestamp
     * @return int
     */
    public static function convertDateTimeToInt($input_date_time) {

        $check_date_pattern = "/\d{2}-\d{2}-\d{4}(\s+)?\d{1,2}:\d{1,2}/i";
        $format_date_time = str_replace("/", "-", $input_date_time);

        if(preg_match($check_date_pattern, $format_date_time)) {
            list($date, $time) = array_values(array_filter(explode(" ", $format_date_time)));

            return strtotime($date. " ". $time);
        }

        return 0;
    }
}