<?php
header('Content-Type: application/json');

// It is recommended to set a default recipient email in your .env file (MAIL_TO)
// as the mail service will use it as a fallback.

require_once __DIR__ . '/mail/MailService.php';

$response = ['success' => false, 'error' => 'An unknown error occurred.'];

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $name = trim($_POST['name'] ?? '');
    $email = trim($_POST['email'] ?? '');
    $message = trim($_POST['message'] ?? '');

    if (empty($name) || empty($email) || empty($message)) {
        $response['error'] = 'Please fill out all fields.';
    } elseif (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
        $response['error'] = 'Please provide a valid email address.';
    } else {
        $subject = 'New Contact Form Submission from ' . htmlspecialchars($name);
        
        // Using MailService to send the contact message.
        // The user's email is automatically set as the Reply-To address.
        // The recipient is determined by the MailService configuration (defaults to MAIL_TO in .env).
        $result = MailService::sendContactMessage($name, $email, $message, null, $subject);

        if (!empty($result['success'])) {
            $response['success'] = true;
            unset($response['error']);
        } else {
            // For security, we don't expose detailed mailer errors to the client.
            // The error is logged on the server for debugging.
            error_log('MailService Error: ' . ($result['error'] ?? 'Unknown error while sending email.'));
            $response['error'] = 'Sorry, there was an issue sending your message. Please try again later.';
        }
    }
} else {
    http_response_code(405); // Method Not Allowed
    $response['error'] = 'Invalid request method.';
}

echo json_encode($response);