<?php

namespace Aowow;

if (!defined('AOWOW_REVISION'))
    die('illegal access');


class LocString
{
    private \WeakMap $store;

    public function __construct(array $data, string $key = 'name', ?callable $callback = null)
    {
        $this->store = new \WeakMap();

        $callback ??= fn($x) => $x;

        if (!array_filter($data, fn($v, $k) => $v && strstr($k, $key.'_loc'), ARRAY_FILTER_USE_BOTH))
            trigger_error('LocString - is entrirely empty', E_USER_WARNING);

        foreach (Locale::cases() as $l)
            $this->store[$l] = (string)$callback($data[$key.'_loc'.$l->value] ?? '');
    }

    public function __toString() : string
    {
        if ($str = $this->store[Lang::getLocale()])
            return $str;

        foreach (Locale::cases() as $l)                // desired loc not set, use any other
            if ($str = $this->store[$l])
                return Cfg::get('DEBUG') ? '['.$str.']' : $str;

        return Cfg::get('DEBUG') ? '[LOCSTRING]' : '';
    }
}

?>