internal

type Attribute struct {
	Key   string
	Value any
}

type Carrier interface {
	Get(key string) string
	Set(key, value string)
	Keys() []string
}

type OTelConfig struct {
	ServiceName        string
	Endpoint           string
	Insecure           bool
	SampleRatio        float64
	Headers            map[string]string
	UseGRPC            bool
	ResourceAttributes []Attribute
}

type Span interface {
	End()
	SetAttributes(attrs ...Attribute)
	SetStatus(code int, description string)
	RecordError(err error, attrs ...Attribute)
	AddEvent(name string, attrs ...Attribute)
	SpanContext() SpanContext
	IsRecording() bool
}

type SpanContext struct {
	TraceID    string
	SpanID     string
	TraceFlags byte
	Remote     bool
}

type StartConfig struct {
	Kind       int
	Attributes []Attribute
}

type Tracer interface {
	Start(ctx context.Context, name string, cfg StartConfig) (context.Context, Span)
	SpanFromContext(ctx context.Context) Span
	Inject(ctx context.Context, carrier Carrier)
	Extract(ctx context.Context, carrier Carrier) context.Context
	Shutdown(ctx context.Context) error
}