<?php
require __DIR__ . '/vendor/autoload.php'; // PHPMailer
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

// Load .env
if (!file_exists(__DIR__ . '/.env')) {
    exit('Missing .env file!');
}
$dotenv = parse_ini_file(__DIR__ . '/.env', false, INI_SCANNER_RAW);

// Form validation
if ($_SERVER['REQUEST_METHOD'] !== 'POST') exit('Invalid request');
if (!empty($_POST['website'])) exit; // honeypot

$first_name = htmlspecialchars($_POST['first_name'] ?? '');
$last_name  = htmlspecialchars($_POST['last_name'] ?? '');
$drinks = isset($_POST['drinks']) ? implode(', ', $_POST['drinks']) : 'None';
$allergies = htmlspecialchars($_POST['allergies'] ?? '');
if (!$first_name || !$last_name) exit('Missing required fields');

// Compose message
$subject = "New Wedding RSVP from $first_name $last_name";
$body = "Name: $first_name $last_name\n";
$body .= "Drinks: $drinks\n";
$body .= "Allergies: $allergies\n";

// Send email via PHPMailer
$mail = new PHPMailer(true);
try {
    $mail->isSMTP();
    $mail->Host       = $dotenv['SMTP_HOST'];
    $mail->SMTPAuth   = true;
    $mail->Username   = $dotenv['SMTP_USER'];
    $mail->Password   = $dotenv['SMTP_PASS'];
    $mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS;
    $mail->Port       = (int)$dotenv['SMTP_PORT'];

    $mail->setFrom($dotenv['FROM_EMAIL'], $dotenv['FROM_NAME']);
    $mail->addAddress($dotenv['TO_EMAIL']);

    $mail->Subject = $subject;
    $mail->Body    = $body;

    $mail->send();
    echo "Thank you! Your RSVP has been sent.";
} catch (Exception $e) {
    error_log("Mailer Error: {$mail->ErrorInfo}");
    echo "Sorry, something went wrong. Please try again later.";
}