<?php

declare(strict_types=1);
/**
 * This file is part of Hyperf.
 *
 * @link     https://www.hyperf.io
 * @document https://hyperf.wiki
 * @contact  group@hyperf.io
 * @license  https://github.com/hyperf/hyperf/blob/master/LICENSE
 */
namespace Hyperf\Utils;

use Hyperf\Utils\Traits\Macroable;

/**
 * Most of the methods in this file come from illuminate/support,
 * thanks Laravel Team provide such a useful class.
 */
class Str
{
    use Macroable;

    /**
     * The cache of snake-cased words.
     *
     * @var array
     */
    protected static $snakeCache = [];

    /**
     * The cache of camel-cased words.
     *
     * @var array
     */
    protected static $camelCache = [];

    /**
     * The cache of studly-cased words.
     *
     * @var array
     */
    protected static $studlyCache = [];

    /**
     * Return the remainder of a string after a given value.
     *
     * @param string $subject
     * @param string $search
     * @return string
     */
    public static function after($subject, $search)
    {
        return $search === '' ? $subject : array_reverse(explode($search, $subject, 2))[0];
    }

    /**
     * Transliterate a UTF-8 value to ASCII.
     *
     * @param string $value
     * @param string $language
     * @return string
     */
    public static function ascii($value, $language = 'en')
    {
        $languageSpecific = static::languageSpecificCharsArray($language);

        if (! is_null($languageSpecific)) {
            $value = str_replace($languageSpecific[0], $languageSpecific[1], $value);
        }

        foreach (static::charsArray() as $key => $val) {
            $value = str_replace($val, $key, $value);
        }

        return preg_replace('/[^\x20-\x7E]/u', '', $value);
    }

    /**
     * Get the portion of a string before a given value.
     *
     * @param string $subject
     * @param string $search
     * @return string
     */
    public static function before($subject, $search)
    {
        return $search === '' ? $subject : explode($search, $subject)[0];
    }

    /**
     * Convert a value to camel case.
     *
     * @param string $value
     * @return string
     */
    public static function camel($value)
    {
        if (isset(static::$camelCache[$value])) {
            return static::$camelCache[$value];
        }

        return static::$camelCache[$value] = lcfirst(static::studly($value));
    }

    /**
     * Determine if a given string contains a given substring.
     *
     * @param string $haystack
     * @param array|string $needles
     * @return bool
     */
    public static function contains($haystack, $needles)
    {
        foreach ((array) $needles as $needle) {
            if ($needle !== '' && mb_strpos($haystack, $needle) !== false) {
                return true;
            }
        }

        return false;
    }

    /**
     * Determine if a given string ends with a given substring.
     *
     * @param string $haystack
     * @param array|string $needles
     * @return bool
     */
    public static function endsWith($haystack, $needles)
    {
        foreach ((array) $needles as $needle) {
            if (substr($haystack, -strlen($needle)) === (string) $needle) {
                return true;
            }
        }

        return false;
    }

    /**
     * Cap a string with a single instance of a given value.
     *
     * @param string $value
     * @param string $cap
     * @return string
     */
    public static function finish($value, $cap)
    {
        $quoted = preg_quote($cap, '/');

        return preg_replace('/(?:' . $quoted . ')+$/u', '', $value) . $cap;
    }

    /**
     * Determine if a given string matches a given pattern.
     *
     * @param array|string $pattern
     * @param string $value
     * @return bool
     */
    public static function is($pattern, $value)
    {
        $patterns = Arr::wrap($pattern);

        if (empty($patterns)) {
            return false;
        }

        foreach ($patterns as $pattern) {
            // If the given value is an exact match we can of course return true right
            // from the beginning. Otherwise, we will translate asterisks and do an
            // actual pattern match against the two strings to see if they match.
            if ($pattern == $value) {
                return true;
            }

            $pattern = preg_quote($pattern, '#');

            // Asterisks are translated into zero-or-more regular expression wildcards
            // to make it convenient to check if the strings starts with the given
            // pattern such as "library/*", making any string check convenient.
            $pattern = str_replace('\*', '.*', $pattern);

            if (preg_match('#^' . $pattern . '\z#u', $value) === 1) {
                return true;
            }
        }

        return false;
    }

    /**
     * Convert a string to kebab case.
     *
     * @param string $value
     * @return string
     */
    public static function kebab($value)
    {
        return static::snake($value, '-');
    }

    /**
     * Return the length of the given string.
     *
     * @param string $value
     * @param string $encoding
     * @return int
     */
    public static function length($value, $encoding = null)
    {
        if ($encoding) {
            return mb_strlen($value, $encoding);
        }

        return mb_strlen($value);
    }

    /**
     * Limit the number of characters in a string.
     *
     * @param string $value
     * @param int $limit
     * @param string $end
     * @return string
     */
    public static function limit($value, $limit = 100, $end = '...')
    {
        if (mb_strwidth($value, 'UTF-8') <= $limit) {
            return $value;
        }

        return rtrim(mb_strimwidth($value, 0, $limit, '', 'UTF-8')) . $end;
    }

    /**
     * Convert the given string to lower-case.
     *
     * @param string $value
     * @return string
     */
    public static function lower($value)
    {
        return mb_strtolower($value, 'UTF-8');
    }

    /**
     * Limit the number of words in a string.
     */
    public static function words(string $value, int $words = 100, string $end = '...'): string
    {
        preg_match('/^\s*+(?:\S++\s*+){1,' . $words . '}/u', $value, $matches);

        if (! isset($matches[0]) || static::length($value) === static::length($matches[0])) {
            return $value;
        }

        return rtrim($matches[0]) . $end;
    }

    /**
     * Parse a Class@method style callback into class and method.
     *
     * @param null|string $default
     */
    public static function parseCallback(string $callback, $default = null): array
    {
        return static::contains($callback, '@') ? explode('@', $callback, 2) : [$callback, $default];
    }

    /**
     * Pluralize the last word of an English, studly caps case string.
     */
    public static function pluralStudly(string $value, int $count = 2): string
    {
        $parts = preg_split('/(.)(?=[A-Z])/u', $value, -1, PREG_SPLIT_DELIM_CAPTURE);

        $lastWord = array_pop($parts);

        return implode('', $parts) . self::plural($lastWord, $count);
    }

    /**
     * Get the plural form of an English word.
     */
    public static function plural(string $value, int $count = 2): string
    {
        return Pluralizer::plural($value, $count);
    }

    /**
     * Generate a more truly "random" alpha-numeric string.
     */
    public static function random(int $length = 16): string
    {
        $string = '';

        while (($len = strlen($string)) < $length) {
            $size = $length - $len;

            $bytes = random_bytes($size);

            $string .= substr(str_replace(['/', '+', '='], '', base64_encode($bytes)), 0, $size);
        }

        return $string;
    }

    /**
     * Replace a given value in the string sequentially with an array.
     */
    public static function replaceArray(string $search, array $replace, string $subject): string
    {
        foreach ($replace as $value) {
            $subject = static::replaceFirst($search, (string) $value, $subject);
        }

        return $subject;
    }

    /**
     * Replace the first occurrence of a given value in the string.
     */
    public static function replaceFirst(string $search, string $replace, string $subject): string
    {
        if ($search == '') {
            return $subject;
        }

        $position = strpos($subject, $search);

        if ($position !== false) {
            return substr_replace($subject, $replace, $position, strlen($search));
        }

        return $subject;
    }

    /**
     * Replace the last occurrence of a given value in the string.
     */
    public static function replaceLast(string $search, string $replace, string $subject): string
    {
        $position = strrpos($subject, $search);

        if ($position !== false) {
            return substr_replace($subject, $replace, $position, strlen($search));
        }

        return $subject;
    }

    /**
     * Begin a string with a single instance of a given value.
     */
    public static function start(string $value, string $prefix): string
    {
        $quoted = preg_quote($prefix, '/');

        return $prefix . preg_replace('/^(?:' . $quoted . ')+/u', '', $value);
    }

    /**
     * Convert the given string to upper-case.
     */
    public static function upper(string $value): string
    {
        return mb_strtoupper($value, 'UTF-8');
    }

    /**
     * Convert the given string to title case.
     */
    public static function title(string $value): string
    {
        return mb_convert_case($value, MB_CASE_TITLE, 'UTF-8');
    }

    /**
     * Get the singular form of an English word.
     */
    public static function singular(string $value): string
    {
        return Pluralizer::singular($value);
    }

    /**
     * Generate a URL friendly "slug" from a given string.
     */
    public static function slug(string $title, string $separator = '-', string $language = 'en'): string
    {
        $title = $language ? static::ascii($title, $language) : $title;

        // Convert all dashes/underscores into separator
        $flip = $separator === '-' ? '_' : '-';

        $title = preg_replace('![' . preg_quote($flip) . ']+!u', $separator, $title);

        // Replace @ with the word 'at'
        $title = str_replace('@', $separator . 'at' . $separator, $title);

        // Remove all characters that are not the separator, letters, numbers, or whitespace.
        $title = preg_replace('![^' . preg_quote($separator) . '\pL\pN\s]+!u', '', mb_strtolower($title));

        // Replace all separator characters and whitespace by a single separator
        $title = preg_replace('![' . preg_quote($separator) . '\s]+!u', $separator, $title);

        return trim($title, $separator);
    }

    /**
     * Convert a string to snake case.
     */
    public static function snake(string $value, string $delimiter = '_'): string
    {
        $key = $value;

        if (isset(static::$snakeCache[$key][$delimiter])) {
            return static::$snakeCache[$key][$delimiter];
        }

        if (! ctype_lower($value)) {
            $value = preg_replace('/\s+/u', '', ucwords($value));

            $value = static::lower(preg_replace('/(.)(?=[A-Z])/u', '$1' . $delimiter, $value));
        }

        return static::$snakeCache[$key][$delimiter] = $value;
    }

    /**
     * Determine if a given string starts with a given substring.
     *
     * @param array|string $needles
     */
    public static function startsWith(string $haystack, $needles): bool
    {
        foreach ((array) $needles as $needle) {
            if ($needle !== '' && substr($haystack, 0, strlen($needle)) === (string) $needle) {
                return true;
            }
        }

        return false;
    }

    /**
     * Convert a value to studly caps case.
     */
    public static function studly(string $value, string $gap = ''): string
    {
        $key = $value;

        if (isset(static::$studlyCache[$key])) {
            return static::$studlyCache[$key];
        }

        $value = ucwords(str_replace(['-', '_'], ' ', $value));

        return static::$studlyCache[$key] = str_replace(' ', $gap, $value);
    }

    /**
     * Returns the portion of string specified by the start and length parameters.
     *
     * @param string $string
     * @param int $start
     * @param null|int $length
     * @return string
     */
    public static function substr($string, $start, $length = null)
    {
        return mb_substr($string, $start, $length, 'UTF-8');
    }

    /**
     * Make a string's first character uppercase.
     */
    public static function ucfirst(string $string): string
    {
        return static::upper(static::substr($string, 0, 1)) . static::substr($string, 1);
    }

    /**
     * Returns the replacements for the ascii method.
     * Note: Adapted from Stringy\Stringy.
     *
     * @see https://github.com/danielstjules/Stringy/blob/3.1.0/LICENSE.txt
     */
    protected static function charsArray(): array
    {
        static $charsArray;

        if (isset($charsArray)) {
            return $charsArray;
        }

        return $charsArray = [
            '0' => ['°', '₀', '۰', '０'],
            '1' => ['¹', '₁', '۱', '１'],
            '2' => ['²', '₂', '۲', '２'],
            '3' => ['³', '₃', '۳', '３'],
            '4' => ['⁴', '₄', '۴', '٤', '４'],
            '5' => ['⁵', '₅', '۵', '٥', '５'],
            '6' => ['⁶', '₆', '۶', '٦', '６'],
            '7' => ['⁷', '₇', '۷', '７'],
            '8' => ['⁸', '₈', '۸', '８'],
            '9' => ['⁹', '₉', '۹', '９'],
            'a' => [
                'à',
                'á',
                'ả',
                'ã',
                'ạ',
                'ă',
                'ắ',
                'ằ',
                'ẳ',
                'ẵ',
                'ặ',
                'â',
                'ấ',
                'ầ',
                'ẩ',
                'ẫ',
                'ậ',
                'ā',
                'ą',
                'å',
                'α',
                'ά',
                'ἀ',
                'ἁ',
                'ἂ',
                'ἃ',
                'ἄ',
                'ἅ',
                'ἆ',
                'ἇ',
                'ᾀ',
                'ᾁ',
                'ᾂ',
                'ᾃ',
                'ᾄ',
                'ᾅ',
                'ᾆ',
                'ᾇ',
                'ὰ',
                'ά',
                'ᾰ',
                'ᾱ',
                'ᾲ',
                'ᾳ',
                'ᾴ',
                'ᾶ',
                'ᾷ',
                'а',
                'أ',
                'အ',
                'ာ',
                'ါ',
                'ǻ',
                'ǎ',
                'ª',
                'ა',
                'अ',
                'ا',
                'ａ',
                'ä',
            ],
            'b' => ['б', 'β', 'ب', 'ဗ', 'ბ', 'ｂ'],
            'c' => ['ç', 'ć', 'č', 'ĉ', 'ċ', 'ｃ'],
            'd' => ['ď', 'ð', 'đ', 'ƌ', 'ȡ', 'ɖ', 'ɗ', 'ᵭ', 'ᶁ', 'ᶑ', 'д', 'δ', 'د', 'ض', 'ဍ', 'ဒ', 'დ', 'ｄ'],
            'e' => [
                'é',
                'è',
                'ẻ',
                'ẽ',
                'ẹ',
                'ê',
                'ế',
                'ề',
                'ể',
                'ễ',
                'ệ',
                'ë',
                'ē',
                'ę',
                'ě',
                'ĕ',
                'ė',
                'ε',
                'έ',
                'ἐ',
                'ἑ',
                'ἒ',
                'ἓ',
                'ἔ',
                'ἕ',
                'ὲ',
                'έ',
                'е',
                'ё',
                'э',
                'є',
                'ə',
                'ဧ',
                'ေ',
                'ဲ',
                'ე',
                'ए',
                'إ',
                'ئ',
                'ｅ',
            ],
            'f' => ['ф', 'φ', 'ف', 'ƒ', 'ფ', 'ｆ'],
            'g' => ['ĝ', 'ğ', 'ġ', 'ģ', 'г', 'ґ', 'γ', 'ဂ', 'გ', 'گ', 'ｇ'],
            'h' => ['ĥ', 'ħ', 'η', 'ή', 'ح', 'ه', 'ဟ', 'ှ', 'ჰ', 'ｈ'],
            'i' => [
                'í',
                'ì',
                'ỉ',
                'ĩ',
                'ị',
                'î',
                'ï',
                'ī',
                'ĭ',
                'į',
                'ı',
                'ι',
                'ί',
                'ϊ',
                'ΐ',
                'ἰ',
                'ἱ',
                'ἲ',
                'ἳ',
                'ἴ',
                'ἵ',
                'ἶ',
                'ἷ',
                'ὶ',
                'ί',
                'ῐ',
                'ῑ',
                'ῒ',
                'ΐ',
                'ῖ',
                'ῗ',
                'і',
                'ї',
                'и',
                'ဣ',
                'ိ',
                'ီ',
                'ည်',
                'ǐ',
                'ი',
                'इ',
                'ی',
                'ｉ',
            ],
            'j' => ['ĵ', 'ј', 'Ј', 'ჯ', 'ج', 'ｊ'],
            'k' => ['ķ', 'ĸ', 'к', 'κ', 'Ķ', 'ق', 'ك', 'က', 'კ', 'ქ', 'ک', 'ｋ'],
            'l' => ['ł', 'ľ', 'ĺ', 'ļ', 'ŀ', 'л', 'λ', 'ل', 'လ', 'ლ', 'ｌ'],
            'm' => ['м', 'μ', 'م', 'မ', 'მ', 'ｍ'],
            'n' => ['ñ', 'ń', 'ň', 'ņ', 'ŉ', 'ŋ', 'ν', 'н', 'ن', 'န', 'ნ', 'ｎ'],
            'o' => [
                'ó',
                'ò',
                'ỏ',
                'õ',
                'ọ',
                'ô',
                'ố',
                'ồ',
                'ổ',
                'ỗ',
                'ộ',
                'ơ',
                'ớ',
                'ờ',
                'ở',
                'ỡ',
                'ợ',
                'ø',
                'ō',
                'ő',
                'ŏ',
                'ο',
                'ὀ',
                'ὁ',
                'ὂ',
                'ὃ',
                'ὄ',
                'ὅ',
                'ὸ',
                'ό',
                'о',
                'و',
                'θ',
                'ို',
                'ǒ',
                'ǿ',
                'º',
                'ო',
                'ओ',
                'ｏ',
                'ö',
            ],
            'p' => ['п', 'π', 'ပ', 'პ', 'پ', 'ｐ'],
            'q' => ['ყ', 'ｑ'],
            'r' => ['ŕ', 'ř', 'ŗ', 'р', 'ρ', 'ر', 'რ', 'ｒ'],
            's' => ['ś', 'š', 'ş', 'с', 'σ', 'ș', 'ς', 'س', 'ص', 'စ', 'ſ', 'ს', 'ｓ'],
            't' => ['ť', 'ţ', 'т', 'τ', 'ț', 'ت', 'ط', 'ဋ', 'တ', 'ŧ', 'თ', 'ტ', 'ｔ'],
            'u' => [
                'ú',
                'ù',
                'ủ',
                'ũ',
                'ụ',
                'ư',
                'ứ',
                'ừ',
                'ử',
                'ữ',
                'ự',
                'û',
                'ū',
                'ů',
                'ű',
                'ŭ',
                'ų',
                'µ',
                'у',
                'ဉ',
                'ု',
                'ူ',
                'ǔ',
                'ǖ',
                'ǘ',
                'ǚ',
                'ǜ',
                'უ',
                'उ',
                'ｕ',
                'ў',
                'ü',
            ],
            'v' => ['в', 'ვ', 'ϐ', 'ｖ'],
            'w' => ['ŵ', 'ω', 'ώ', 'ဝ', 'ွ', 'ｗ'],
            'x' => ['χ', 'ξ', 'ｘ'],
            'y' => ['ý', 'ỳ', 'ỷ', 'ỹ', 'ỵ', 'ÿ', 'ŷ', 'й', 'ы', 'υ', 'ϋ', 'ύ', 'ΰ', 'ي', 'ယ', 'ｙ'],
            'z' => ['ź', 'ž', 'ż', 'з', 'ζ', 'ز', 'ဇ', 'ზ', 'ｚ'],
            'aa' => ['ع', 'आ', 'آ'],
            'ae' => ['æ', 'ǽ'],
            'ai' => ['ऐ'],
            'ch' => ['ч', 'ჩ', 'ჭ', 'چ'],
            'dj' => ['ђ', 'đ'],
            'dz' => ['џ', 'ძ'],
            'ei' => ['ऍ'],
            'gh' => ['غ', 'ღ'],
            'ii' => ['ई'],
            'ij' => ['ĳ'],
            'kh' => ['х', 'خ', 'ხ'],
            'lj' => ['љ'],
            'nj' => ['њ'],
            'oe' => ['ö', 'œ', 'ؤ'],
            'oi' => ['ऑ'],
            'oii' => ['ऒ'],
            'ps' => ['ψ'],
            'sh' => ['ш', 'შ', 'ش'],
            'shch' => ['щ'],
            'ss' => ['ß'],
            'sx' => ['ŝ'],
            'th' => ['þ', 'ϑ', 'ث', 'ذ', 'ظ'],
            'ts' => ['ц', 'ც', 'წ'],
            'ue' => ['ü'],
            'uu' => ['ऊ'],
            'ya' => ['я'],
            'yu' => ['ю'],
            'zh' => ['ж', 'ჟ', 'ژ'],
            '(c)' => ['©'],
            'A' => [
                'Á',
                'À',
                'Ả',
                'Ã',
                'Ạ',
                'Ă',
                'Ắ',
                'Ằ',
                'Ẳ',
                'Ẵ',
                'Ặ',
                'Â',
                'Ấ',
                'Ầ',
                'Ẩ',
                'Ẫ',
                'Ậ',
                'Å',
                'Ā',
                'Ą',
                'Α',
                'Ά',
                'Ἀ',
                'Ἁ',
                'Ἂ',
                'Ἃ',
                'Ἄ',
                'Ἅ',
                'Ἆ',
                'Ἇ',
                'ᾈ',
                'ᾉ',
                'ᾊ',
                'ᾋ',
                'ᾌ',
                'ᾍ',
                'ᾎ',
                'ᾏ',
                'Ᾰ',
                'Ᾱ',
                'Ὰ',
                'Ά',
                'ᾼ',
                'А',
                'Ǻ',
                'Ǎ',
                'Ａ',
                'Ä',
            ],
            'B' => ['Б', 'Β', 'ब', 'Ｂ'],
            'C' => ['Ç', 'Ć', 'Č', 'Ĉ', 'Ċ', 'Ｃ'],
            'D' => ['Ď', 'Ð', 'Đ', 'Ɖ', 'Ɗ', 'Ƌ', 'ᴅ', 'ᴆ', 'Д', 'Δ', 'Ｄ'],
            'E' => [
                'É',
                'È',
                'Ẻ',
                'Ẽ',
                'Ẹ',
                'Ê',
                'Ế',
                'Ề',
                'Ể',
                'Ễ',
                'Ệ',
                'Ë',
                'Ē',
                'Ę',
                'Ě',
                'Ĕ',
                'Ė',
                'Ε',
                'Έ',
                'Ἐ',
                'Ἑ',
                'Ἒ',
                'Ἓ',
                'Ἔ',
                'Ἕ',
                'Έ',
                'Ὲ',
                'Е',
                'Ё',
                'Э',
                'Є',
                'Ə',
                'Ｅ',
            ],
            'F' => ['Ф', 'Φ', 'Ｆ'],
            'G' => ['Ğ', 'Ġ', 'Ģ', 'Г', 'Ґ', 'Γ', 'Ｇ'],
            'H' => ['Η', 'Ή', 'Ħ', 'Ｈ'],
            'I' => [
                'Í',
                'Ì',
                'Ỉ',
                'Ĩ',
                'Ị',
                'Î',
                'Ï',
                'Ī',
                'Ĭ',
                'Į',
                'İ',
                'Ι',
                'Ί',
                'Ϊ',
                'Ἰ',
                'Ἱ',
                'Ἳ',
                'Ἴ',
                'Ἵ',
                'Ἶ',
                'Ἷ',
                'Ῐ',
                'Ῑ',
                'Ὶ',
                'Ί',
                'И',
                'І',
                'Ї',
                'Ǐ',
                'ϒ',
                'Ｉ',
            ],
            'J' => ['Ｊ'],
            'K' => ['К', 'Κ', 'Ｋ'],
            'L' => ['Ĺ', 'Ł', 'Л', 'Λ', 'Ļ', 'Ľ', 'Ŀ', 'ल', 'Ｌ'],
            'M' => ['М', 'Μ', 'Ｍ'],
            'N' => ['Ń', 'Ñ', 'Ň', 'Ņ', 'Ŋ', 'Н', 'Ν', 'Ｎ'],
            'O' => [
                'Ó',
                'Ò',
                'Ỏ',
                'Õ',
                'Ọ',
                'Ô',
                'Ố',
                'Ồ',
                'Ổ',
                'Ỗ',
                'Ộ',
                'Ơ',
                'Ớ',
                'Ờ',
                'Ở',
                'Ỡ',
                'Ợ',
                'Ø',
                'Ō',
                'Ő',
                'Ŏ',
                'Ο',
                'Ό',
                'Ὀ',
                'Ὁ',
                'Ὂ',
                'Ὃ',
                'Ὄ',
                'Ὅ',
                'Ὸ',
                'Ό',
                'О',
                'Θ',
                'Ө',
                'Ǒ',
                'Ǿ',
                'Ｏ',
                'Ö',
            ],
            'P' => ['П', 'Π', 'Ｐ'],
            'Q' => ['Ｑ'],
            'R' => ['Ř', 'Ŕ', 'Р', 'Ρ', 'Ŗ', 'Ｒ'],
            'S' => ['Ş', 'Ŝ', 'Ș', 'Š', 'Ś', 'С', 'Σ', 'Ｓ'],
            'T' => ['Ť', 'Ţ', 'Ŧ', 'Ț', 'Т', 'Τ', 'Ｔ'],
            'U' => [
                'Ú',
                'Ù',
                'Ủ',
                'Ũ',
                'Ụ',
                'Ư',
                'Ứ',
                'Ừ',
                'Ử',
                'Ữ',
                'Ự',
                'Û',
                'Ū',
                'Ů',
                'Ű',
                'Ŭ',
                'Ų',
                'У',
                'Ǔ',
                'Ǖ',
                'Ǘ',
                'Ǚ',
                'Ǜ',
                'Ｕ',
                'Ў',
                'Ü',
            ],
            'V' => ['В', 'Ｖ'],
            'W' => ['Ω', 'Ώ', 'Ŵ', 'Ｗ'],
            'X' => ['Χ', 'Ξ', 'Ｘ'],
            'Y' => ['Ý', 'Ỳ', 'Ỷ', 'Ỹ', 'Ỵ', 'Ÿ', 'Ῠ', 'Ῡ', 'Ὺ', 'Ύ', 'Ы', 'Й', 'Υ', 'Ϋ', 'Ŷ', 'Ｙ'],
            'Z' => ['Ź', 'Ž', 'Ż', 'З', 'Ζ', 'Ｚ'],
            'AE' => ['Æ', 'Ǽ'],
            'Ch' => ['Ч'],
            'Dj' => ['Ђ'],
            'Dz' => ['Џ'],
            'Gx' => ['Ĝ'],
            'Hx' => ['Ĥ'],
            'Ij' => ['Ĳ'],
            'Jx' => ['Ĵ'],
            'Kh' => ['Х'],
            'Lj' => ['Љ'],
            'Nj' => ['Њ'],
            'Oe' => ['Œ'],
            'Ps' => ['Ψ'],
            'Sh' => ['Ш'],
            'Shch' => ['Щ'],
            'Ss' => ['ẞ'],
            'Th' => ['Þ'],
            'Ts' => ['Ц'],
            'Ya' => ['Я'],
            'Yu' => ['Ю'],
            'Zh' => ['Ж'],
            ' ' => [
                "\xC2\xA0",
                "\xE2\x80\x80",
                "\xE2\x80\x81",
                "\xE2\x80\x82",
                "\xE2\x80\x83",
                "\xE2\x80\x84",
                "\xE2\x80\x85",
                "\xE2\x80\x86",
                "\xE2\x80\x87",
                "\xE2\x80\x88",
                "\xE2\x80\x89",
                "\xE2\x80\x8A",
                "\xE2\x80\xAF",
                "\xE2\x81\x9F",
                "\xE3\x80\x80",
                "\xEF\xBE\xA0",
            ],
        ];
    }

    /**
     * Returns the language specific replacements for the ascii method.
     * Note: Adapted from Stringy\Stringy.
     *
     * @see https://github.com/danielstjules/Stringy/blob/3.1.0/LICENSE.txt
     * @return null|array
     */
    protected static function languageSpecificCharsArray(string $language)
    {
        static $languageSpecific;

        if (! isset($languageSpecific)) {
            $languageSpecific = [
                'bg' => [
                    ['х', 'Х', 'щ', 'Щ', 'ъ', 'Ъ', 'ь', 'Ь'],
                    ['h', 'H', 'sht', 'SHT', 'a', 'А', 'y', 'Y'],
                ],
                'de' => [
                    ['ä', 'ö', 'ü', 'Ä', 'Ö', 'Ü'],
                    ['ae', 'oe', 'ue', 'AE', 'OE', 'UE'],
                ],
            ];
        }

        return $languageSpecific[$language] ?? null;
    }
}
