<?php
namespace DayTidy;

use DateTimeZone;
use Webilia\WP\DateTime as BaseDateTime;
use Webilia\WP\Helpers\Arr;
use \Webilia\WP\Formats\DateTime as DateTimeFormat;

class DateTime extends BaseDateTime
{
    /**
     * @param string|DateTimeZone|int|null $timezone
     */
    public function set_timezone($timezone = null): DateTime
    {
        // Timezone
        $this->tz = (new TimeZone($timezone))->get();

        return $this;
    }

    /**
     * @param string|DateTimeZone|int|null $timezone
     */
    public function toTimezone(string $format, $timezone = null): string
    {
        // Target Timezone
        $timezone = (new TimeZone($timezone))->get();

        // Convert & Format
        return $this->convert($timezone)->format($format);
    }

    /**
     * @param string|string[] $datetimes
     * @param string $format
     * @param DateTimeZone|null $tz
     * @param string $separator
     * @return string
     */
    public static function render($datetimes, string $format = '', ?DateTimeZone $tz = null, string $separator = ','): string
    {
        // Format
        if (trim($format) === '') $format = DateTimeFormat::wp();

        // Multiple DateTimes
        if (Arr::is($datetimes))
        {
            $results = [];
            foreach ($datetimes as $datetime)
            {
                $results[] = self::render($datetime, $format, $tz, $separator);
            }

            return implode($separator, $results);
        }

        // Render Date
        return wp_date($format, strtotime($datetimes), $tz);
    }
}