var (
	ErrUserCloseTopic = errors.New("ydb: user closed topic listener")
)

type EventHandler interface {
	// OnStartPartitionSessionRequest called when server send start partition session request method.
	// You can use it to store read progress on your own side.
	// You must call event.Confirm(...) for start to receive messages from the partition.
	// You can set topiclistener.StartPartitionSessionConfirm for change default settings.
	//
	// Experimental: https://github.com/ydb-platform/ydb-go-sdk/blob/master/VERSIONING.md#experimental
	OnStartPartitionSessionRequest(ctx context.Context, event *PublicEventStartPartitionSession) error

	// OnReadMessages called with batch of messages. Max count of messages limited by internal buffer size
	//
	// Experimental: https://github.com/ydb-platform/ydb-go-sdk/blob/master/VERSIONING.md#experimental
	OnReadMessages(ctx context.Context, event *PublicReadMessages) error

	// OnStopPartitionSessionRequest called when the server send stop partition message.
	// It means that no more OnReadMessages calls for the partition session.
	// You must call event.Confirm() for allow the server to stop the partition session (if event.Graceful=true).
	// Confirm is optional for event.Graceful=false
	// The method can be called twice: with event.Graceful=true, then event.Graceful=false.
	// It is guaranteed about the method will be called least once.
	//
	// Experimental: https://github.com/ydb-platform/ydb-go-sdk/blob/master/VERSIONING.md#experimental
	OnStopPartitionSessionRequest(ctx context.Context, event *PublicEventStopPartitionSession) error
}

type PublicEventStartPartitionSession struct {
	PartitionSession topicreadercommon.PublicPartitionSession
	CommittedOffset  int64
	PartitionOffsets PublicOffsetsRange
	// contains filtered or unexported fields
}

type PublicEventStopPartitionSession struct {
	PartitionSession topicreadercommon.PublicPartitionSession

	// Graceful mean about server is waiting for client finish work with the partition and confirm stop the work
	// if the field is false it mean about server stop lease the partition to the client and can assignee the partition
	// to other read session (on this or other connection).
	Graceful        bool
	CommittedOffset int64
	// contains filtered or unexported fields
}

type PublicOffsetsRange struct {
	Start int64
	End   int64
}

type PublicReadMessages struct {
	PartitionSession topicreadercommon.PublicPartitionSession
	Batch            *topicreadercommon.PublicBatch
	// contains filtered or unexported fields
}

type PublicStartPartitionSessionConfirm struct {
	CommitOffset *int64 ``
	// contains filtered or unexported fields
}

type StreamListenerConfig struct {
	BufferSize             int
	Decoders               topicreadercommon.DecoderMap
	Selectors              []*topicreadercommon.PublicReadSelector
	Consumer               string
	ConnectWithoutConsumer bool
	// contains filtered or unexported fields
}

type TopicClient interface {
	StreamRead(ctxStreamLifeTime context.Context, readerID int64, tracer *trace.Topic) (rawtopicreader.StreamReader, error)
}

type TopicListenerReconnector struct {
	// contains filtered or unexported fields
}