<?php
declare(strict_types=1);

// Autoloader (без изменений)
spl_autoload_register(static function (string $class): void {
    if (strpos($class, 'Cf7stg\\') !== 0) {
        return;
    }
    $relative = substr($class, strlen('Cf7stg\\'));
    $slug = strtolower(preg_replace('/([a-z0-9])([A-Z])/', '$1-$2', $relative));
    $slug = str_replace('_', '-', $slug);
    $candidates = [
        __DIR__ . '/../includes/class-' . $slug . '.php',
        __DIR__ . '/../includes/sources/class-' . $slug . '.php',
        __DIR__ . '/../admin/class-' . $slug . '.php',
        __DIR__ . '/../includes/' . $slug . '.php',
        __DIR__ . '/../includes/sources/' . $slug . '.php',
        __DIR__ . '/../admin/' . $slug . '.php',
    ];
    foreach ($candidates as $path) {
        if (is_file($path)) {
            require_once $path;
            return;
        }
    }
});

// Stateful WP shims
final class Cf7stgWpShimState
{
    /** @var array<string,mixed> */
    public static array $options = [];
    /** @var array<string,array<int,array{cb:callable,priority:int,accepted_args:int,seq:int}>> */
    public static array $filters = [];
    public static int $next_seq = 0;

    public static function reset(): void
    {
        self::$options = [];
        self::$filters = [];
        self::$next_seq = 0;
    }
}

if (!function_exists('apply_filters')) {
    function apply_filters($tag, $value, ...$args) {
        if (!isset(Cf7stgWpShimState::$filters[$tag])) {
            return $value;
        }
        $callbacks = Cf7stgWpShimState::$filters[$tag];
        usort($callbacks, static fn($a, $b) => ($a['priority'] <=> $b['priority']) ?: ($a['seq'] <=> $b['seq']));
        foreach ($callbacks as $f) {
            $cb_args = array_slice(array_merge([$value], $args), 0, $f['accepted_args']);
            $value = call_user_func_array($f['cb'], $cb_args);
        }
        return $value;
    }
}

if (!function_exists('add_filter')) {
    function add_filter($tag, $cb, $priority = 10, $accepted_args = 1) {
        Cf7stgWpShimState::$filters[$tag][] = [
            'cb' => $cb,
            'priority' => (int)$priority,
            'accepted_args' => (int)$accepted_args,
            'seq' => Cf7stgWpShimState::$next_seq++,
        ];
        return true;
    }
}

if (!function_exists('remove_all_filters')) {
    function remove_all_filters($tag, $priority = false) {
        if ($priority === false) {
            unset(Cf7stgWpShimState::$filters[$tag]);
            return true;
        }
        if (!isset(Cf7stgWpShimState::$filters[$tag])) {
            return true;
        }
        Cf7stgWpShimState::$filters[$tag] = array_values(array_filter(
            Cf7stgWpShimState::$filters[$tag],
            static fn($f) => $f['priority'] !== (int)$priority
        ));
        return true;
    }
}

if (!function_exists('add_action')) {
    function add_action($tag, $cb, $priority = 10, $accepted_args = 1) {
        return add_filter($tag, $cb, $priority, $accepted_args);
    }
}

if (!function_exists('do_action')) {
    function do_action($tag, ...$args) {
        apply_filters($tag, null, ...$args);
    }
}

if (!function_exists('get_option')) {
    function get_option($key, $default = false) {
        return Cf7stgWpShimState::$options[$key] ?? $default;
    }
}

if (!function_exists('update_option')) {
    function update_option($key, $value) {
        Cf7stgWpShimState::$options[$key] = $value;
        return true;
    }
}

if (!function_exists('add_option')) {
    function add_option($key, $value) {
        if (array_key_exists($key, Cf7stgWpShimState::$options)) {
            return false;
        }
        Cf7stgWpShimState::$options[$key] = $value;
        return true;
    }
}

if (!function_exists('delete_option')) {
    function delete_option($key) {
        unset(Cf7stgWpShimState::$options[$key]);
        return true;
    }
}

if (!function_exists('is_email')) {
    function is_email($email) {
        $email = (string)$email;
        if ($email === '' || !filter_var($email, FILTER_VALIDATE_EMAIL)) {
            return false;
        }
        return $email;
    }
}

if (!function_exists('current_time')) {
    function current_time($format) {
        if ($format === 'mysql') return date('Y-m-d H:i:s');
        return date($format);
    }
}

if (!function_exists('wp_date')) {
    function wp_date($format, $timestamp = null) {
        return date($format, $timestamp ?? time());
    }
}

if (!function_exists('esc_html')) {
    function esc_html($s) { return htmlspecialchars((string)$s, ENT_QUOTES, 'UTF-8'); }
}
if (!function_exists('esc_url')) {
    function esc_url($s) { return filter_var((string)$s, FILTER_SANITIZE_URL); }
}
if (!function_exists('wp_strip_all_tags')) {
    function wp_strip_all_tags($s) { return trim(strip_tags((string)$s)); }
}
if (!function_exists('__')) {
    function __($text) { return $text; }
}
if (!function_exists('wp_json_encode')) {
    function wp_json_encode($v) { return json_encode($v, JSON_UNESCAPED_UNICODE); }
}