var tlsClientSessionCacheSize = 100

// ConnSettings - contains connection settings.
type ConnSettings struct {
	DialContext DialContext // Custom dialContext, DialTimeout is ignored if this is already setup.
	LookupHost  LookupHost  // Custom lookupHost, is nil on containerized deployments.
	DialTimeout time.Duration

	// TLS Settings
	RootCAs          *x509.CertPool
	CipherSuites     []uint16
	CurvePreferences []tls.CurveID

	// HTTP2

// NewInternodeDialContext setups a custom dialer for internode communication
func NewInternodeDialContext(dialTimeout time.Duration, opts TCPOptions) DialContext {
	return func(ctx context.Context, network, addr string) (net.Conn, error) {
		dialer := &net.Dialer{
			Timeout: dialTimeout,
			Control: setTCPParametersFn(opts),
		}
		return dialer.DialContext(ctx, network, addr)
	}
}

// NewCustomDialContext configures a custom dialer for internode communications
func NewCustomDialContext(dialTimeout time.Duration, _ TCPOptions) DialContext {
	return func(ctx context.Context, network, addr string) (net.Conn, error) {
		dialer := &net.Dialer{
			Timeout: dialTimeout,
		}
		return dialer.DialContext(ctx, network, addr)
	}

	if endpoints == "" {
		return cfg, nil
	}

	etcdEndpoints, etcdSecure, err := parseEndpoints(endpoints)
	if err != nil {
		return cfg, err
	}

	cfg.Enabled = true
	cfg.DialTimeout = defaultDialTimeout
	cfg.DialKeepAliveTime = defaultDialKeepAlive
	// Disable etcd client SDK logging, etcd client
	// incorrectly starts logging in unexpected data
	// format.
	cfg.LogConfig = &zap.Config{

}

// Store returns any underlying store if set.
func (target *WebhookTarget) Store() event.TargetStore {
	return target.store
}

func (target *WebhookTarget) isActive() (bool, error) {
	conn, err := net.DialTimeout("tcp", target.addr, 5*time.Second)
	if err != nil {
		if xnet.IsNetworkOrHostDown(err, false) {
			return false, store.ErrNotConnected
		}
		return false, err
	}
	defer conn.Close()
	return true, nil