import type { Readable } from "stream";
import type { Client as GRPCClient, ClientOptions as GRPCClientOptions, ChannelCredentials } from "@grpc/grpc-js";
import { MemberInfo as GrpcMemberInfo } from "../../generated/kurrentdb/protocols/v1/gossip_pb";
import VNodeState = GrpcMemberInfo.VNodeState;
import type { ResolvedEvent, AllStreamResolvedEvent, EventType, PersistentSubscriptionToAllResolvedEvent, PersistentSubscriptionToStreamResolvedEvent, EventData } from "./events";
import type * as constants from "../constants";
export interface BaseOptions {
    /**
     * Overwrite the default credentials. Accepts either basic
     * username/password credentials or a bearer token.
     */
    credentials?: Credentials;
    /**
     * Command requires a leader node.
     */
    requiresLeader?: boolean;
    /**
     * An optional length of time (in milliseconds) to override the default deadline.
     */
    deadline?: number;
}
/**
 * A structure referring to a potential logical record position in the KurrentDB transaction file.
 */
export type Position = {
    commit: bigint;
    prepare: bigint;
};
export type ReadRevision = typeof constants.START | typeof constants.END | bigint;
export type ReadPosition = typeof constants.START | typeof constants.END | Position;
/**
 * Constants used for expected version control. The use of expected version can be a bit tricky especially when
 * discussing assurances given by the KurrentDB server.
 *
 * The KurrentDB server will assure idempotency for all operations using any value in ExpectedVersion except
 * {@link ANY}. When using {@link ANY}., the KurrentDB server will do its best to assure
 * idempotency but will not guarantee idempotency.
 */
export type StreamState = typeof constants.ANY
/**
 * The stream being written to should not yet exist. If it does exist, treats that as a concurrency problem.
 */
 | typeof constants.NO_STREAM
/**
 * States that the last event written to the stream should have an event number matching your expected value.
 */
 | bigint;
export type AppendStreamState = 
/**
 * The stream should exist. If it or a metadata stream does not exist, treats that as a concurrency problem.
 */
typeof constants.STREAM_EXISTS
/**
 * @see {@link StreamState}.
 */
 | StreamState;
export type CurrentStreamState = 
/**
 * The stream being written to does not yet exist.
 */
typeof constants.NO_STREAM
/**
 * The current event number of the last event written to the stream.
 */
 | bigint;
/**
 * Represents the direction of read operation (both from '$all' and a regular stream).
 */
export type Direction = typeof constants.FORWARDS | typeof constants.BACKWARDS;
export interface AppendResult {
    /**
     * If the append was successful. Only relevant if `throwOnAppendFailure` is set to false.
     */
    success: boolean;
    /**
     * The current revision of the stream, to be passed as the `expectedRevision` in the next call.
     */
    nextExpectedRevision: bigint;
    /**
     * The logical record position in the KurrentDB transaction file.
     */
    position?: Position;
}
export type ProjectionStatus = typeof constants.CREATING | typeof constants.LOADING | typeof constants.LOADED | typeof constants.PREPARING | typeof constants.PREPARED | typeof constants.STARTING | typeof constants.LOADING_STOPPED | typeof constants.RUNNING | typeof constants.STOPPING | typeof constants.ABORTING | typeof constants.STOPPED | typeof constants.COMPLETED | typeof constants.ABORTED | typeof constants.FAULTED | typeof constants.DELETING;
export type ProcessingStatus = typeof constants.PAUSED | typeof constants.WRITING_RESULTS | typeof constants.STOPPED | "";
/**
 * Provides the details for a projection.
 */
export interface ProjectionDetails {
    /**
     * The CoreProcessingTime.
     */
    coreProcessingTime: bigint;
    /**
     * The projection version.
     */
    version: bigint;
    /**
     * The Epoch.
     */
    epoch: bigint;
    /**
     * The projection EffectiveName.
     */
    effectiveName: string;
    /**
     * The projection WritesInProgress.
     */
    writesInProgress: number;
    /**
     * The projection ReadsInProgress.
     */
    readsInProgress: number;
    /**
     * The projection PartitionsCached.
     */
    partitionsCached: number;
    /**
     * The raw status of the projection.
     * Split into {@link projectionStatus} and {@link processingStatus} for convenience.
     */
    status: string;
    /**
     * The current status of the projection.
     */
    projectionStatus: ProjectionStatus;
    /**
     * The current status of the projection.
     */
    processingStatus: ProcessingStatus;
    /**
     * The projection StateReason.
     */
    stateReason: string;
    /**
     * The projection Name.
     */
    name: string;
    /**
     * The projection Position.
     */
    position: string;
    /**
     * The projection Progress.
     */
    progress: number;
    /**
     * LastCheckpoint.
     */
    lastCheckpoint: string;
    /**
     * The projection EventsProcessedAfterRestart.
     */
    eventsProcessedAfterRestart: bigint;
    /**
     * The projection CheckpointStatus.
     */
    checkpointStatus: string;
    /**
     * The projection BufferedEvents.
     */
    bufferedEvents: bigint;
    /**
     * The projection WritePendingEventsBeforeCheckpoint.
     */
    writePendingEventsBeforeCheckpoint: number;
    /**
     * The projection WritePendingEventsAfterCheckpoint.
     */
    writePendingEventsAfterCheckpoint: number;
}
export interface DeleteResult {
    position?: Position;
}
export type ConsumerStrategy = typeof constants.DISPATCH_TO_SINGLE | typeof constants.ROUND_ROBIN | typeof constants.PINNED | typeof constants.PINNED_BY_CORRELATION;
export type PersistentAction = typeof constants.PARK | typeof constants.RETRY | typeof constants.SKIP | typeof constants.STOP;
export type NodePreference = typeof constants.RANDOM | typeof constants.FOLLOWER | typeof constants.LEADER | typeof constants.READ_ONLY_REPLICA;
export type ProjectionEngineVersion = typeof constants.PROJECTION_ENGINE_V1 | typeof constants.PROJECTION_ENGINE_V2;
export interface EndPoint {
    address: string;
    port: number;
}
export interface MemberInfo {
    instanceId?: string;
    timeStamp: number;
    state: VNodeState;
    isAlive: boolean;
    httpEndpoint?: EndPoint;
}
export type VerifyOptions = Parameters<typeof ChannelCredentials.createSsl>[3];
export type GRPCClientConstructor<T extends GRPCClient> = new (address: string, credentials: ChannelCredentials, options?: Partial<GRPCClientOptions>) => T;
export type FilterOn = typeof constants.EVENT_TYPE | typeof constants.STREAM_NAME;
export interface FilterBase {
    /**
     * What to filter on.
     */
    filterOn: FilterOn;
    /**
     * Sets how often the checkpointReached callback is called.
     * Must be greater than 0.
     */
    checkpointInterval: number;
    /**
     * A callback invoked and await when a checkpoint is reached.
     * Set the checkpointInterval to define how often this method is called.
     */
    checkpointReached?: (subscription: AllStreamSubscription, position: Position) => Promise<void> | void;
    /**
     * The maximum number of events that are filtered out before the page is returned
     * Must be greater than 0, if supplied.
     */
    maxSearchWindow?: number;
}
export interface RegexFilter extends FilterBase {
    /**
     * A regex to filter by.
     */
    regex: string;
}
export interface PrefixesFilter extends FilterBase {
    /**
     * A list of prefixes to filter on.
     */
    prefixes: string[];
}
export type Filter = RegexFilter | PrefixesFilter;
/**
 * Username/password credentials used to authenticate against KurrentDB,
 * rendered as an HTTP Basic `Authorization` header.
 */
export interface BasicCredentials {
    username: string;
    password: string;
}
/**
 * Bearer-token credentials used to authenticate against KurrentDB, rendered
 * as an HTTP Bearer `Authorization` header. Bearer tokens are
 * programmatic-only and cannot be supplied via a connection string.
 */
export interface BearerCredentials {
    bearerToken: string;
}
/**
 * Credential shape accepted by the client. Either basic username/password
 * or a bearer token.
 */
export type Credentials = BasicCredentials | BearerCredentials;
/**
 * Callback invoked before every RPC to obtain fresh credentials. Use this for
 * refresh-aware token sources such as Azure Entra or OIDC. The provider runs
 * once per outbound request, so consumers can return a cached token until
 * expiry and rotate transparently.
 */
export type CredentialsProvider = () => Credentials | Promise<Credentials>;
export interface Certificate {
    userCertFile: Buffer;
    userKeyFile: Buffer;
}
export interface StreamingRead<E> extends Readable {
    cancel(): Promise<void>;
    addListener(event: "close", listener: () => void): this;
    addListener(event: "data", listener: (event: E) => void): this;
    addListener(event: "end", listener: () => void): this;
    addListener(event: "readable", listener: () => void): this;
    addListener(event: "error", listener: (err: Error) => void): this;
    addListener(event: string | symbol, listener: (...args: unknown[]) => void): this;
    on(event: "close", listener: () => void): this;
    on(event: "data", listener: (event: E) => void): this;
    on(event: "end", listener: () => void): this;
    on(event: "readable", listener: () => void): this;
    on(event: "error", listener: (err: Error) => void): this;
    on(event: string | symbol, listener: (...args: unknown[]) => void): this;
    once(event: "close", listener: () => void): this;
    once(event: "data", listener: (event: E) => void): this;
    once(event: "end", listener: () => void): this;
    once(event: "readable", listener: () => void): this;
    once(event: "error", listener: (err: Error) => void): this;
    once(event: string | symbol, listener: (...args: unknown[]) => void): this;
    prependListener(event: "close", listener: () => void): this;
    prependListener(event: "data", listener: (event: E) => void): this;
    prependListener(event: "end", listener: () => void): this;
    prependListener(event: "readable", listener: () => void): this;
    prependListener(event: "error", listener: (err: Error) => void): this;
    prependListener(event: string | symbol, listener: (...args: unknown[]) => void): this;
    prependOnceListener(event: "close", listener: () => void): this;
    prependOnceListener(event: "data", listener: (event: E) => void): this;
    prependOnceListener(event: "end", listener: () => void): this;
    prependOnceListener(event: "readable", listener: () => void): this;
    prependOnceListener(event: "error", listener: (err: Error) => void): this;
    prependOnceListener(event: string | symbol, listener: (...args: unknown[]) => void): this;
    removeListener(event: "close", listener: () => void): this;
    removeListener(event: "data", listener: (event: E) => void): this;
    removeListener(event: "end", listener: () => void): this;
    removeListener(event: "error", listener: (err: Error) => void): this;
    removeListener(event: string | symbol, listener: (...args: unknown[]) => void): this;
    [Symbol.asyncIterator](): AsyncIterableIterator<E>;
}
export interface ReadableSubscription<E> extends Readable {
    id?: string;
    unsubscribe(): Promise<void>;
    addListener(event: "close", listener: () => void): this;
    addListener(event: "data", listener: (event: E) => void): this;
    addListener(event: "end", listener: () => void): this;
    addListener(event: "readable", listener: () => void): this;
    addListener(event: "error", listener: (err: Error) => void): this;
    addListener(event: "confirmation", listener: () => void): this;
    addListener(event: string | symbol, listener: (...args: unknown[]) => void): this;
    on(event: "close", listener: () => void): this;
    on(event: "data", listener: (event: E) => void): this;
    on(event: "end", listener: () => void): this;
    on(event: "readable", listener: () => void): this;
    on(event: "error", listener: (err: Error) => void): this;
    on(event: "confirmation", listener: () => void): this;
    on(event: string | symbol, listener: (...args: unknown[]) => void): this;
    once(event: "close", listener: () => void): this;
    once(event: "data", listener: (event: E) => void): this;
    once(event: "end", listener: () => void): this;
    once(event: "readable", listener: () => void): this;
    once(event: "error", listener: (err: Error) => void): this;
    once(event: "confirmation", listener: () => void): this;
    once(event: string | symbol, listener: (...args: unknown[]) => void): this;
    prependListener(event: "close", listener: () => void): this;
    prependListener(event: "data", listener: (event: E) => void): this;
    prependListener(event: "end", listener: () => void): this;
    prependListener(event: "readable", listener: () => void): this;
    prependListener(event: "error", listener: (err: Error) => void): this;
    prependListener(event: "confirmation", listener: () => void): this;
    prependListener(event: string | symbol, listener: (...args: unknown[]) => void): this;
    prependOnceListener(event: "close", listener: () => void): this;
    prependOnceListener(event: "data", listener: (event: E) => void): this;
    prependOnceListener(event: "end", listener: () => void): this;
    prependOnceListener(event: "readable", listener: () => void): this;
    prependOnceListener(event: "error", listener: (err: Error) => void): this;
    prependOnceListener(event: "confirmation", listener: () => void): this;
    prependOnceListener(event: string | symbol, listener: (...args: unknown[]) => void): this;
    removeListener(event: "close", listener: () => void): this;
    removeListener(event: "data", listener: (event: E) => void): this;
    removeListener(event: "end", listener: () => void): this;
    removeListener(event: "readable", listener: () => void): this;
    removeListener(event: "error", listener: (err: Error) => void): this;
    removeListener(event: "confirmation", listener: () => void): this;
    removeListener(event: string | symbol, listener: (...args: unknown[]) => void): this;
    [Symbol.asyncIterator](): AsyncIterableIterator<E>;
}
export interface PersistentSubscriptionBase<E> extends ReadableSubscription<E> {
    /**
     * Acknowledge events as handled.
     */
    ack(...events: ResolvedEvent[]): Promise<void>;
    /**
     * "Not Acknowledge" the event.
     */
    nack(action: PersistentAction, reason: string, ...events: ResolvedEvent[]): Promise<void>;
}
/**
 * The $all or stream subscription has caught up and become live.
 */
export interface CaughtUp {
    /**
     * Current time in the server when the subscription caught up.
     */
    date?: Date;
    /**
     * Checkpoint for resuming a stream subscription.
     * For stream subscriptions it is populated unless the stream is empty.
     * For $all subscriptions it is not populated.
     */
    revision?: bigint;
    /**
     * Checkpoint for resuming a $all subscription.
     * For stream subscriptions it is not populated.
     * For $all subscriptions it is populated unless the database is empty.
     */
    position?: Position;
}
/**
 * The $all or stream subscription has fallen back into catchup mode and is no longer live.
 */
export interface FellBehind {
    /**
     * Current time in the server when the subscription fell behind.
     */
    date?: Date;
    /**
     * Checkpoint for resuming a stream subscription.
     * For stream subscriptions it is populated unless the stream is empty.
     * For $all subscriptions it is not populated.
     */
    revision?: bigint;
    /**
     * Checkpoint for resuming an $all subscription.
     * For stream subscriptions it is not populated.
     * For $all subscriptions it is populated unless the database is empty.
     */
    position?: Position;
}
export interface AppendStreamRequest<KnownEventType extends EventType = EventType> {
    streamName: string;
    events: EventData<KnownEventType>[];
    expectedState: AppendStreamState;
}
export interface AppendResponse {
    streamName: string;
    revision: bigint;
}
export interface BaseAppendErrorDetails {
    type: string;
}
export type AppendErrorDetails = ({
    type: "unknown";
} & BaseAppendErrorDetails) | ({
    type: "access_denied";
    reason: string;
} & BaseAppendErrorDetails) | ({
    type: "stream_deleted";
} & BaseAppendErrorDetails) | ({
    type: "wrong_expected_revision";
    revision: bigint;
} & BaseAppendErrorDetails) | ({
    type: "transaction_max_size_exceeded";
    maxSize: number;
} & BaseAppendErrorDetails);
export declare const UnknownErrorDetails: AppendErrorDetails;
export type MultiAppendResult = {
    position: bigint;
    responses: AppendResponse[];
};
/**
 * Represents a record to be appended in an {@link Client.appendRecords} operation.
 * Each record specifies its own target stream, allowing interleaved writes across multiple streams.
 */
export interface AppendRecordInput<KnownEventType extends EventType = EventType> {
    /**
     * The name of the target stream for this record.
     */
    streamName: string;
    /**
     * The record data to append.
     */
    record: EventData<KnownEventType>;
}
/**
 * Represents a consistency check to be evaluated before committing an {@link Client.appendRecords} operation.
 * Checks are decoupled from writes: a check can reference any stream, whether or not the request writes to it.
 */
export type ConsistencyCheck = StreamStateCheck;
/**
 * A check that asserts a stream is at a specific revision or lifecycle state before commit.
 */
export interface StreamStateCheck {
    type: typeof constants.STREAM_STATE;
    /**
     * The stream name to check.
     */
    streamName: string;
    /**
     * The expected state of the stream (revision number or state constant).
     */
    expectedState: AppendStreamState;
}
/**
 * Details of a single consistency check violation.
 */
export interface ConsistencyViolation {
    /**
     * Index of the check in the original checks list.
     */
    checkIndex: number;
    /**
     * The stream whose state was checked.
     */
    streamName: string;
    /**
     * The expected state of the stream.
     */
    expectedState: AppendStreamState;
    /**
     * The actual state of the stream at the time the check was evaluated.
     * Specific revision (bigint >= 0), or "no_stream" if the stream doesn't exist.
     * Deleted streams return -5n and tombstoned streams return -6n.
     */
    actualState: CurrentStreamState;
}
/**
 * Result of a successful {@link Client.appendRecords} operation.
 */
export type AppendRecordsResult = MultiAppendResult;
export interface CatchupSubscription {
    addListener(event: "caughtUp", listener: (info: CaughtUp) => void): this;
    addListener(event: "fellBehind", listener: (info: FellBehind) => void): this;
    on(event: "caughtUp", listener: (info: CaughtUp) => void): this;
    on(event: "fellBehind", listener: (info: FellBehind) => void): this;
    once(event: "caughtUp", listener: (info: CaughtUp) => void): this;
    once(event: "fellBehind", listener: (info: FellBehind) => void): this;
    prependListener(event: "caughtUp", listener: (info: CaughtUp) => void): this;
    prependListener(event: "fellBehind", listener: (info: FellBehind) => void): this;
    prependOnceListener(event: "caughtUp", listener: (info: CaughtUp) => void): this;
    prependOnceListener(event: "fellBehind", listener: (info: FellBehind) => void): this;
    removeListener(event: "caughtUp", listener: (info: CaughtUp) => void): this;
    removeListener(event: "fellBehind", listener: (info: FellBehind) => void): this;
}
export type PersistentSubscriptionToStream<E extends EventType = EventType> = PersistentSubscriptionBase<PersistentSubscriptionToStreamResolvedEvent<E>>;
export type PersistentSubscriptionToAll = PersistentSubscriptionBase<PersistentSubscriptionToAllResolvedEvent>;
export type StreamSubscription<E extends EventType = EventType> = ReadableSubscription<ResolvedEvent<E>> & CatchupSubscription;
export type AllStreamSubscription = ReadableSubscription<AllStreamResolvedEvent> & CatchupSubscription;
export { VNodeState };
export * from "./events";