<?php

/**
 * AVE.cms - Модуль Настройки captcha
 * @author Repellent
 * @package AVE.cms
 */

class ModuleEditcaptcha
{
    public $tpl_dir;

    private function checkAccess()
    {
        return (defined('ACP') && check_permission('modules'));
    }

    public function editCaptcha()
    {
        global $AVE_Template;
        $config_file = BASE_DIR . '/lib/kcaptcha/kcaptcha_config.php';
        
        // Дефолты
        $allowed_symbols = "23456789abcdegikpqsvxyz";
        $length = "4,6";
        $fluctuation_amplitude = 8;
        $white_noise_density = "1/30";
        $black_noise_density = "1/30";
        $no_spaces = true;
        $background_color = array(255, 255, 255);

        if (file_exists($config_file)) {
            include($config_file);
        }

        // Преобразуем массив RGB в HEX для инпута в админке
        $bg_hex = sprintf("#%02x%02x%02x", $background_color[0], $background_color[1], $background_color[2]);

        $AVE_Template->assign([
            'allow_symbols' => $allowed_symbols,
            'count_symbols' => $length, 
            'fluct_amplit'  => $fluctuation_amplitude,
            'white_noise'   => $white_noise_density,
            'black_noise'   => $black_noise_density,
            'no_spaces'     => ($no_spaces == true) ? 'true' : 'false',
            'bg_color'      => $bg_hex
        ]);

        $AVE_Template->assign('content', $AVE_Template->fetch($this->tpl_dir . 'editcaptcha.tpl'));
    }

    public function saveCaptcha()
    {
        if (!$this->checkAccess()) exit("Access Denied");

        $a = preg_replace('/[^a-z0-9]/i', '', $_POST['a'] ?? '');
        $b = preg_replace('/[^0-9,]/', '', $_POST['b'] ?? '4,6');
        $c = (int)($_POST['c'] ?? 8);
        $d = strip_tags($_POST['d'] ?? '0');
        $e = strip_tags($_POST['e'] ?? '0');
        $f = ($_POST['f'] === 'true') ? 'true' : 'false';
        
        // Обработка цвета фона (из #ffffff в array(255,255,255))
        $hex = $_POST['g'] ?? '#ffffff';
        list($r, $g, $b_rgb) = sscanf($hex, "#%02x%02x%02x");

        $length_val = (strpos($b, ',') !== false) ? "mt_rand({$b})" : (int)$b;

        $text = "<?php\n\n";
        $text .= "# KCAPTCHA configuration file\n";
        $text .= "\$alphabet = \"0123456789abcdefghijklmnopqrstuvwxyz\";\n";
        $text .= "\$allowed_symbols = \"{$a}\";\n";
        $text .= "\$fontsdir = 'fonts';\n";
        $text .= "\$length = {$length_val};\n"; 
        $text .= "\$width = 160;\n";
        $text .= "\$height = 80;\n";
        $text .= "\$fluctuation_amplitude = {$c};\n";
        $text .= "\$white_noise_density = {$d};\n";
        $text .= "\$black_noise_density = {$e};\n";
        $text .= "\$no_spaces = {$f};\n";
        $text .= "\$show_credits = false;\n";
        $text .= "\$foreground_color = array(mt_rand(0,80), mt_rand(0,80), mt_rand(0,80));\n";
        $text .= "\$background_color = array({$r}, {$g}, {$b_rgb});\n";
        $text .= "\$jpeg_quality = 95;\n";
        $text .= "?>";

        $file_path = BASE_DIR . "/lib/kcaptcha/kcaptcha_config.php";
        if (is_writable($file_path) || @chmod($file_path, 0666)) {
            file_put_contents($file_path, $text);
            echo "success";
        } else {
            echo "Ошибка прав доступа к файлу конфига!";
        }
        exit;
    }
}