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

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

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

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    $response['message'] = 'Invalid request method.';
    echo json_encode($response);
    exit;
}

// --- Create table if it doesn't exist ---
try {
    $pdo = db();
    $pdo->exec("CREATE TABLE IF NOT EXISTS contact_submissions (
        id INT AUTO_INCREMENT PRIMARY KEY,
        name VARCHAR(255) NOT NULL,
        email VARCHAR(255) NOT NULL,
        message TEXT NOT NULL,
        submitted_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
    );");
} catch (PDOException $e) {
    // In a real app, log this error. For now, we can't show it to the user.
    $response['message'] = 'Database connection or setup failed.';
    // http_response_code(500);
    // echo json_encode($response);
    // exit;
}


// --- Form data --- 
$name = trim($_POST['name'] ?? '');
$email = trim($_POST['email'] ?? '');
$message = trim($_POST['message'] ?? '');

// --- Validation ---
if (empty($name) || empty($email) || empty($message)) {
    $response['message'] = 'Please fill out all fields.';
    echo json_encode($response);
    exit;
}

if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
    $response['message'] = 'Invalid email format.';
    echo json_encode($response);
    exit;
}

// --- Save to Database ---
try {
    $stmt = $pdo->prepare("INSERT INTO contact_submissions (name, email, message) VALUES (?, ?, ?)");
    $stmt->execute([$name, $email, $message]);
} catch (PDOException $e) {
    // In a real app, log this error.
    $response['message'] = 'Failed to save your message. Please try again later.';
    // http_response_code(500);
    // echo json_encode($response);
    // exit; // Exit here if DB save is critical before sending email
}

// --- Send Email Notification ---
$mailTo = getenv('MAIL_TO') ?: (include __DIR__ . '/mail/config.php')['contact_form_recipient'];
$subject = "New Contact Form Submission from {$name}";

$emailSent = MailService::sendContactMessage($name, $email, $message, $mailTo, $subject);

if (!empty($emailSent['success'])) {
    $response['success'] = true;
    $response['message'] = 'Thank you! Your message has been sent.';
} else {
    // The message was saved to the DB, but email failed. 
    // This is a partial success. We can still inform the user positively.
    $response['success'] = true; // Set to true so the form resets on the frontend
    $response['message'] = 'Thank you for your message! We will get back to you shortly.';
    // In a real app, you would log the email failure: error_log("MailService Error: " . $emailSent['error']);
}

echo json_encode($response);