function google_maps_shortcode($atts) {
    // Check if Google Maps JavaScript API is already loaded
    if ( ! wp_script_is( 'google-maps', 'enqueued' ) ) {
        // Google Maps JavaScript API is not loaded, enqueue it
        wp_enqueue_script( 'google-maps', 'https://maps.googleapis.com/maps/api/js?key=API_KEY', array(), null, false );
    }

    $atts = shortcode_atts(
        array(
            'width' => '100%',
            'height' => '400px',
            'address' => '',
            'zoom' => '17'
        ),
        $atts,
        'gmap'
    );

    // Generate a unique ID for the map container
    $map_id = 'gmap_' . substr(sha1(rand()), 0, 8);

    // Sanitize attributes
    $width = esc_attr($atts['width']);
    $height = esc_attr($atts['height']);
    $address = esc_attr($atts['address']);
    $zoom = intval($atts['zoom']);

    // Generate the map HTML
    $map = '
    <div id="'.$map_id.'" style="height: '.$height.'; width: '.$width.';"></div>
    <script>
        function initMap_'.$map_id.'() {
            var address = "'.$address.'";
            var mapOptions = {
                zoom: '.$zoom.',
                center: {lat: 0, lng: 0}
            };
            var map = new google.maps.Map(document.getElementById("'.$map_id.'"), mapOptions);
            var geocoder = new google.maps.Geocoder();
            geocoder.geocode({"address": address}, function(results, status) {
                if (status === google.maps.GeocoderStatus.OK) {
                    map.setCenter(results[0].geometry.location);
                    var marker = new google.maps.Marker({
                        map: map,
                        position: results[0].geometry.location
                    });
                } else {
                    alert("지정된 위치를 찾을 수 없습니다: " + status);
                }
            });
        }

        // Load the map when the Google Maps API is ready
        function loadGoogleMapScript_'.$map_id.'() {
            initMap_'.$map_id.'();
        }
        window.addEventListener("load", loadGoogleMapScript_'.$map_id.');
    </script>   
    ';

    return $map;
}
add_shortcode('gmap', 'google_maps_shortcode');