<?php

/**
 * webtrees: online genealogy
 * Copyright (C) 2026 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

declare(strict_types=1);

namespace Fisharebest\Webtrees\Module;

use Fisharebest\Localization\Locale\LocaleInterface;
use Fisharebest\Localization\Locale\LocaleRu;
use Fisharebest\Webtrees\Encodings\UTF8;

class LanguageRussian extends AbstractModule implements ModuleLanguageInterface
{
    use ModuleLanguageTrait;

    /**
     * @return array<int,string>
     */
    public function alphabet(): array
    {
        return [
            'А',
            'Б',
            'В',
            'Г',
            'Д',
            'Е',
            'Ё',
            'Ж',
            'З',
            'И',
            'Й',
            'К',
            'Л',
            'М',
            'Н',
            'О',
            'П',
            'Р',
            'С',
            'Т',
            'У',
            'Ф',
            'Х',
            'Ц',
            'Ч',
            'Ш',
            'Щ',
            'Ъ',
            'Ы',
            'Ь',
            'Э',
            'Ю',
            'Я',
        ];
    }

    public function locale(): LocaleInterface
    {
        return new LocaleRu();
    }

    /**
     * Letters with diacritics that are considered distinct letters in this language.
     *
     * @return array<string,string>
     */
    protected function normalizeExceptions(): array
    {
        return [
            UTF8::CYRILLIC_CAPITAL_LETTER_IE . UTF8::COMBINING_DIAERESIS => UTF8::CYRILLIC_CAPITAL_LETTER_IO,
            UTF8::CYRILLIC_SMALL_LETTER_IE . UTF8::COMBINING_DIAERESIS   => UTF8::CYRILLIC_SMALL_LETTER_IO,
            UTF8::CYRILLIC_CAPITAL_LETTER_I . UTF8::COMBINING_BREVE      => UTF8::CYRILLIC_CAPITAL_LETTER_SHORT_I,
            UTF8::CYRILLIC_SMALL_LETTER_I . UTF8::COMBINING_BREVE        => UTF8::CYRILLIC_SMALL_LETTER_SHORT_I,
        ];
    }
}
