<?php
defined('_JEXEC') or die;

use Joomla\CMS\Plugin\CMSPlugin;
use Joomla\CMS\Factory;

class PlgVisformsElvisexport extends CMSPlugin
{
    /**
     * Einfaches Debug-Logging nach /tmp/iolqueue/debug.log
     */
    private function debug($msg)
    {
        $log = JPATH_ROOT . '/tmp/iolqueue/debug.log';
        $dir = dirname($log);

        if (!is_dir($dir)) {
            @mkdir($dir, 0755, true);
        }

        file_put_contents(
            $log,
            date('Y-m-d H:i:s') . ' - ' . $msg . "\n",
            FILE_APPEND
        );
    }

    /**
     * Visforms-Hook nach dem Speichern eines Formulars
     */
    public function onVisformsAfterFormSave($form, $data)
    {
        $app = Factory::getApplication();
        $this->debug('AKTIVE VERSION: Elvisexport');

        // VARIANTE A: Kein Abbruch im Backend
        // (kein isClient('administrator')-Check)

        if (!is_object($form) || !isset($form->id)) {
            $this->debug('Abbruch: Keine Formular-ID');
            return;
        }

        $formId = (int) $form->id;
        $this->debug('Formular-ID: ' . $formId);

        // Rohdaten aus POST (Visforms-Feldnamen F1, F2, ...)
        $post = $_POST;

        // Queue-Verzeichnis
        $queuePath = JPATH_ROOT . '/tmp/iolqueue';
        if (!is_dir($queuePath)) {
            @mkdir($queuePath, 0755, true);
            $this->debug('Queue-Verzeichnis erstellt: ' . $queuePath);
        }

        // Formular 1 – Mitgliedsantrag
        if ($formId === 1) {
            $this->debug('Formular 1 erkannt – Mitgliedsantrag');

            $keys = [
                "F1","F2","F3","F4","F5","F6","F7","F8","F9","F10",
                "F11","F12","F13","F14","F15","F16","F17","F18","F19","F20",
                "F21","F22","F23","F24","F25","F26","F28","F29","F30","F31",
                "F32","F34","F35","F36","F37","F38","F39","F40","F41","F42",
                "F43","F44","F45","F46","F47","F48","F49","F50","F51"
            ];

            $values = [];
            foreach ($keys as $key) {
                $values[] = isset($post[$key]) ? $this->sanitizeValue($post[$key]) : '';
            }

            $csvLine = implode(';', $values);

            $content  = "[ILM]\r\n";
            $content .= "SystemID=50001\r\n";
            $content .= "AppID=10900000\r\n";
            $content .= "FilterCond=(" . $csvLine . ")\r\n";
            $content .= "FilterView=viwEMtgl\r\n";

            $this->writeIolFiles($content, $queuePath, $formId);
        }

        // Formular 4 – Kursanmeldung
        if ($formId === 4) {
            $this->debug('Formular 4 erkannt – Kursanmeldung');

            $keys = [
                "F106","F107","F108","F109","F110","F111","F112","F113","F114","F115",
                "F116","F117","F118","F119","F120","F121","F122","F123","F124","F125",
                "F126","F127","F128","F129","F130","F131","F132","F133","F134","F135",
                "F136","F137","F138","F139","F140"
            ];

            $values = [];
            foreach ($keys as $key) {
                $values[] = isset($post[$key]) ? $this->sanitizeValue($post[$key]) : '';
            }

            $csvLine = implode(';', $values);

            $content  = "[ILM]\r\n";
            $content .= "SystemID=50001\r\n";
            $content .= "AppID=10900090\r\n";
            $content .= "FilterCond=(" . $csvLine . ")\r\n";
            $content .= "FilterView=viwEKTeilN\r\n";

            $this->writeIolFiles($content, $queuePath, $formId);
        }

        // Visforms läuft normal weiter
        return true;
    }

    /**
     * Schreibt IOL-Datei (UTF-16LE BOM) und Job-Datei (JSON)
     */
    private function writeIolFiles($content, $queuePath, $formId)
    {
        // UTF-16LE mit BOM
        $contentUtf16 = "\xFF\xFE" . iconv('UTF-8', 'UTF-16LE//IGNORE', $content);

        $filename = 'formular_' . $formId . '_' . date('Ymd_His') . '.iol';
        $fullPath = $queuePath . '/' . $filename;

        file_put_contents($fullPath, $contentUtf16);
        $this->debug('IOL-Datei geschrieben: ' . $filename);

        // Mail-Ziel aus Plugin-Parametern
        $mailTo = $this->params->get('mail_to', '');

        $jobData = json_encode([
            'to'       => $mailTo,
            'filename' => $filename,
            'filepath' => $fullPath,
            'subject'  => 'Neuer Formular-Export (IOL)',
            'body'     => 'Es liegt ein neuer Formular-Datensatz vor.'
        ], JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);

        file_put_contents($fullPath . '.job', $jobData);
        $this->debug('Job-Datei geschrieben: ' . $filename . '.job');
    }

    /**
     * Entfernt Zeilenumbrüche und trimmt Werte
     */
    private function sanitizeValue($value): string
    {
        return trim(str_replace(["\r", "\n"], ' ', (string) $value));
    }
}