add_action('template_redirect', function () {
    if (is_admin()) return;

    $flowise_url = get_option('flowiseaiapiurl', '');
    $n8n_url     = get_option('n8napiurl', '');

    $input_value = $_POST['query'] ?? $_GET['query'] ?? null;
    if (!$input_value) return;

    $body = [];
    foreach ($_REQUEST as $key => $value) {
        $body[$key] = sanitize_text_field($value);
    }

    $args = [
        'body'    => $body,
        'timeout' => 30,
    ];

    if (!empty($flowise_url)) {
        call_flowise_api($flowise_url, $args);
    } elseif (!empty($n8n_url)) {
        call_n8n_api($n8n_url, $args);
    }
});

function call_flowise_api($url, $args) {
    $response = wp_remote_post($url, $args);
    handle_api_response($response);
}

function call_n8n_api($url, $args) {
    $response = wp_remote_post($url, $args);
    handle_api_response($response);
}

function handle_api_response($response) {
    header('Content-Type: text/plain; charset=utf-8');

    if (is_wp_error($response)) {
        echo 'Error: ' . esc_html($response->get_error_message());
    } else {
        echo wp_remote_retrieve_body($response);
    }

    exit;
}