package starnet

import "sync/atomic"

// StatsSnapshot is a read-only copy of runtime counters.
type StatsSnapshot struct {
	Accepted      uint64
	TLSDetected   uint64
	PlainDetected uint64
	InitFailures  uint64
	Closed        uint64
}

// Stats provides lock-free counters.
type Stats struct {
	accepted      uint64
	tlsDetected   uint64
	plainDetected uint64
	initFailures  uint64
	closed        uint64
}

func (s *Stats) incAccepted()      { atomic.AddUint64(&s.accepted, 1) }
func (s *Stats) incTLSDetected()   { atomic.AddUint64(&s.tlsDetected, 1) }
func (s *Stats) incPlainDetected() { atomic.AddUint64(&s.plainDetected, 1) }
func (s *Stats) incInitFailures()  { atomic.AddUint64(&s.initFailures, 1) }
func (s *Stats) incClosed()        { atomic.AddUint64(&s.closed, 1) }

// Snapshot returns a stable view of counters.
func (s *Stats) Snapshot() StatsSnapshot {
	return StatsSnapshot{
		Accepted:      atomic.LoadUint64(&s.accepted),
		TLSDetected:   atomic.LoadUint64(&s.tlsDetected),
		PlainDetected: atomic.LoadUint64(&s.plainDetected),
		InitFailures:  atomic.LoadUint64(&s.initFailures),
		Closed:        atomic.LoadUint64(&s.closed),
	}
}

// Logger is a minimal logging abstraction.
type Logger interface {
	Printf(format string, v ...interface{})
}