<?php

declare(strict_types = 1);

/**
 * @author Robert Strutts <Bob_586@Yahoo.com>
 * @copyright (c) 2025, Robert Strutts
 * @license MIT
 */
namespace CodeHydrater\strings;

class string_facade {
    
    private static ?bool $mb_default = null;

    /**
     * Set the default multibyte behavior.
     * Pass `true` to force multibyte, `false` to force single-byte, or `null` to auto-detect.
     */
    public static function set_multibyte_default(?bool $flag): void {
        self::$mb_default = $flag;
    }
    
    protected static function is_multibyte($str) {
        // Use override if set
        if (self::$mb_default !== null) {
            return self::$mb_default;
        }        
        
        $enabled = extension_loaded('mbstring');
        if ($enabled === false) {
            return false;
        }
        return mb_detect_encoding($str, mb_detect_order(), true) !== false &&
               preg_match('/[^\x00-\x7F]/', $str);
    }

    protected static function get_class($str) {
        return self::is_multibyte($str) ? 'mb_string_fns' : 'string_fns';
    }

    public static function get_fn($method, ...$args) {
        if (empty($args)) {
            throw new InvalidArgumentException("At least one argument is required for multibyte check.");
        }

        $class = "\\CodeHydrater\\strings\\" . self::get_class($args[0]);

        if (!method_exists($class, $method)) {
            throw new BadMethodCallException("Method $method does not exist in class $class.");
        }

        return call_user_func_array([$class, $method], $args);
    }

    // Optional: Static passthrough
    public static function __callStatic($method, $args) {
        return self::get_fn($method, ...$args);
    }
}