<?php
require_once __DIR__ . '/../includes/app.php';
require_permission('settings', 'edit');

$user = current_user();
if (!in_array($user['role'], ['owner', 'manager'], true)) {
    set_flash('danger', tr('غير مصرح لك.', 'Unauthorized.'));
    redirect_to('../index.php');
}

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    redirect_to('../index.php');
}

$isAjax = strtolower((string) ($_SERVER['HTTP_X_REQUESTED_WITH'] ?? '')) === 'xmlhttprequest';
$respond = static function (bool $success, string $type, string $message, ?string $redirect = null) use ($isAjax): void {
    if ($isAjax) {
        header('Content-Type: application/json; charset=UTF-8');
        echo json_encode([
            'success' => $success,
            'type' => $type,
            'message' => $message,
            'redirect' => $redirect,
        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        exit;
    }

    set_flash($type, $message);
    header('Location: ' . ($redirect ?: '../index.php'));
    exit;
};

$redirectBack = static function (): string {
    $referer = $_SERVER['HTTP_REFERER'] ?? '../index.php';
    $returnModal = trim((string) ($_POST['return_modal'] ?? ''));
    if ($returnModal === 'wablas') {
        return append_query_params($referer, ['open_modal' => 'wablas']);
    }
    return $referer;
};

$phoneInput = trim((string) ($_POST['wablas_test_phone'] ?? ''));
$message = trim((string) ($_POST['wablas_test_message'] ?? ''));
$token = trim((string) ($_POST['wablas_token'] ?? get_setting('wablas_token', '')));
$secretKey = trim((string) ($_POST['wablas_secret_key'] ?? get_setting('wablas_secret_key', '')));
$apiUrl = trim((string) ($_POST['wablas_api_url'] ?? get_setting('wablas_api_url', '')));

if ($phoneInput === '') {
    $respond(false, 'danger', tr('أدخل رقم واتساب تجريبي صالحاً من 8 خانات.', 'Enter a valid 8-digit test WhatsApp number.'), $redirectBack());
}

$phone = normalize_oman_phone($phoneInput);
if ($phone === '') {
    $respond(false, 'danger', tr('رقم الاختبار يجب أن يكون عمانياً من 8 خانات.', 'The test phone must be a valid 8-digit Oman number.'), $redirectBack());
}

if ($message === '') {
    $respond(false, 'danger', tr('اكتب رسالة الاختبار أولاً.', 'Write the test message first.'), $redirectBack());
}

if (!wablas_has_credentials($token, $secretKey)) {
    $respond(false, 'danger', tr('أدخل Wablas Token و Secret Key قبل إرسال الاختبار.', 'Enter the Wablas token and secret key before sending a test message.'), $redirectBack());
}

$result = wablas_send_message($phone, $message, [
    'token' => $token,
    'secret_key' => $secretKey,
    'api_url' => $apiUrl,
    'ignore_enabled' => true,
]);

if (!empty($result['success'])) {
    $respond(true, 'success', tr('تم إرسال رسالة الاختبار إلى 968 ', 'Test message sent to 968 ') . $phone . '.', $redirectBack());
} else {
    $status = isset($result['status']) ? (' (' . (int) $result['status'] . ')') : '';
    $respond(false, 'danger', tr('فشل إرسال رسالة الاختبار.', 'Failed to send the test message.') . ' ' . (string) ($result['error'] ?? ('Wablas error' . $status)), $redirectBack());
}

$respond(false, 'danger', tr('فشل إرسال رسالة الاختبار.', 'Failed to send the test message.'), $redirectBack());