<?php
/**
 * English names of the built-in template variables.
 *
 * @package Smsportal
 */

namespace Smsportal;

defined( 'ABSPATH' ) || exit;

/**
 * Every built-in variable has a Polish and an English name, and both work in every template:
 * {imie} and {first_name} give the same value. The editor offers the names in the admin's
 * language; saved templates keep working whatever language they were written in.
 */
class Variables {

	/**
	 * English name => Polish name.
	 */
	const ALIASES = array(
		'first_name'      => 'imie',
		'last_name'       => 'nazwisko',
		'order_number'    => 'numer_zamowienia',
		'order_total'     => 'kwota',
		'store_name'      => 'nazwa_sklepu',
		'tracking_number' => 'numer_przesylki',
		'tracking_carrier' => 'przewoznik',
		'tracking_link'   => 'link_przesylki',
		'order_link'      => 'link_zamowienia',
		'service'         => 'usluga',
		'employee'        => 'pracownik',
		'date'            => 'data',
		'time'            => 'godzina',
		'booking_number'  => 'numer_rezerwacji',
		'business_name'   => 'nazwa_firmy',
		'duration'        => 'czas_trwania',
		'location'        => 'miejsce',
		'meeting_link'    => 'link_spotkania',
		'cancel_link'     => 'link_odwolania',
		'reschedule_link' => 'link_zmiany_terminu',
		'end_date'        => 'data_do',
		'resource'        => 'zasob',
		'profile_link'    => 'link_profilu',
		'login_link'      => 'link_logowania',
	);

	/**
	 * Copy each value to its other name, unless that name already has its own value
	 * (a Contact Form 7 field may be called "date").
	 *
	 * @param array<string,mixed> $vars name => value.
	 * @return array<string,mixed>
	 */
	public static function with_aliases( array $vars ): array {
		$all = $vars;
		foreach ( self::ALIASES as $english => $polish ) {
			if ( array_key_exists( $polish, $vars ) && ! array_key_exists( $english, $vars ) ) {
				$all[ $english ] = $vars[ $polish ];
			} elseif ( array_key_exists( $english, $vars ) && ! array_key_exists( $polish, $vars ) ) {
				$all[ $polish ] = $vars[ $english ];
			}
		}
		return $all;
	}

	/**
	 * The variables of a built-in event, named in the admin's language.
	 *
	 * @param array<string,string> $variables Polish name => label.
	 * @return array<string,string>
	 */
	public static function for_editor( array $variables ): array {
		if ( self::polish() ) {
			return $variables;
		}
		$english = array_flip( self::ALIASES );
		$named   = array();
		foreach ( $variables as $name => $label ) {
			$named[ $english[ $name ] ?? $name ] = $label;
		}
		return $named;
	}

	/**
	 * Whether the admin works in Polish.
	 *
	 * @return bool
	 */
	private static function polish(): bool {
		return 0 === strpos( determine_locale(), 'pl' );
	}
}