exports.build_realm_icon_widget = function (upload_function) {
    var get_file_input = function () {
        return $('#realm_icon_file_input').expectOne();
    };

    if (page_params.realm_icon_source === 'G') {
        $("#realm_icon_delete_button").hide();
    } else {
        $("#realm_icon_delete_button").show();
    }
    $("#realm_icon_delete_button").on('click', function (e) {
        e.preventDefault();
        e.stopPropagation();
        channel.del({
            url: '/json/realm/icon',
        });
    });

    return upload_widget.build_direct_upload_widget(
        get_file_input,
        $("#realm_icon_file_input_error").expectOne(),
        $("#realm_icon_upload_button").expectOne(),
        upload_function,
        page_params.max_icon_file_size
    );
};

exports.rerender = function () {
    $("#realm-settings-icon").attr("src", page_params.realm_icon_url);
    if (page_params.realm_icon_source === 'U') {
        $("#realm_icon_delete_button").show();
    } else {
        $("#realm_icon_delete_button").hide();
        // Need to clear input because of a small edge case
        // where you try to upload the same image you just deleted.
        var file_input = $("#realm_icon_file_input");
        file_input.val('');
    }
};

window.realm_icon = exports;