// buildMySQLFilter builds an outbound Envoy MySQLProxy filter.
func buildMySQLFilter(statPrefix string) *listener.Filter {
	mySQLProxy := &mysql.MySQLProxy{
		StatPrefix: statPrefix, // MySQL stats are prefixed with mysql.<statPrefix> by Envoy.
	}

	out := &listener.Filter{
		Name:       wellknown.MySQLProxy,
		ConfigType: &listener.Filter_TypedConfig{TypedConfig: protoconv.MessageToAny(mySQLProxy)},
	}

	return out

	_ "github.com/envoyproxy/go-control-plane/contrib/envoy/extensions/filters/network/kafka_mesh/v3alpha"
	_ "github.com/envoyproxy/go-control-plane/contrib/envoy/extensions/filters/network/mysql_proxy/v3"
	_ "github.com/envoyproxy/go-control-plane/contrib/envoy/extensions/filters/network/postgres_proxy/v3alpha"
	_ "github.com/envoyproxy/go-control-plane/contrib/envoy/extensions/filters/network/rocketmq_proxy/v3"

}

func isMysqlListener(listener *listener.Listener) bool {
	if len(listener.FilterChains) > 0 && len(listener.FilterChains[0].Filters) > 0 {
		return listener.FilterChains[0].Filters[0].Name == wellknown.MySQLProxy
	}
	return false
}

func hasListenerOrFilterChainForPort(listeners []*listener.Listener, port uint32) bool {
	for _, l := range listeners {
		if port == l.Address.GetSocketAddress().GetPortValue() {