<?php

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;
use Dotenv\Dotenv;

require __DIR__ . '/../../composer/vendor/autoload.php';

$envFile = realpath(__DIR__ . '/../../config/.env.mail');

if ($envFile === false) {
    http_response_code(500);
    echo json_encode([
        'success' => false,
        'message' => "Environment file not found"
    ]);
    exit;
}

try {
    $envDir = dirname($envFile);
    
    $dotenv = Dotenv::createImmutable($envDir, '.env.mail');
    
    $dotenv->load();
} catch (Throwable $e) {
    http_response_code(500);
    echo json_encode([
        'success' => false,
        'message' => "Dotenv error"
    ]);
}

function newMailer() {
    global $mailer;

    if (isset($mailer) && $mailer instanceof PHPMailer) {
        return; 
    }

    try {
        $mailer = new PHPMailer(true);
        
        $mailer->isSMTP();
        $mailer->CharSet = 'UTF-8';
        $mailer->Host = $_ENV['MAIL_SERVER']; 
        $mailer->SMTPAuth = true;
        $mailer->Username = $_ENV['MAIL_USER'];
        $mailer->Password = $_ENV['MAIL_USER_PASSWORD'];
        
        $port = (int)$_ENV['MAIL_PORT'];
        if ($port === 465) {
            $mailer->SMTPSecure = PHPMailer::ENCRYPTION_SMTPS;
        } else {
            $mailer->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS;
            $mailer->Port = 587;
        }
        
        $mailer->Port = $port;

        $mailer->setFrom($_ENV['MAIL_USER'], 'WKVS'); 

    } catch (Exception $e) {
        throw new Exception("Konfigurationsfehler des Automailers: " . $e->getMessage());
    }
}

function sendMail(string $content = '', string $subject = '', array $recipients = []) {
    global $mailer;

    if (empty($recipients)) {
        throw new Exception("Keine Empfänger angegeben");
    }

    if (!isset($mailer) || !($mailer instanceof PHPMailer)) {
        try {
            newMailer();
        } catch (Exception $e) {
            throw $e;
        }
    }

    try {
        foreach ($recipients as $email => $name) {
            $mailer->addAddress($email, $name);
        }

        $mailer->isHTML(true);
        $mailer->Subject = $subject;
        $mailer->Body = $content;
        $mailer->AltBody = strip_tags($content);

        if (!$mailer->send()) {
            throw new Exception("Sendefehler " . $mailer->ErrorInfo);
        }

        return true;
    } catch (Exception $e) {
        error_log("Kritischer Sendefehler: " . $e->getMessage());
        throw $e;
    }
}

?>