import * as grpc from '@grpc/grpc-js';
import type { ChannelCredentials, ClientOptions, ServiceDefinition, ClientUnaryCall, ClientReadableStream, ClientDuplexStream, Metadata, CallOptions, ServiceError } from '@grpc/grpc-js';
import type { SessionConfig, CreateSessionResponse, DestroyRequest, DestroyResponse, SessionInfoRequest, SessionInfo, HealthRequest, HealthResponse, InjectMessageRequest, RemoveMessageRequest, GetContextRequest, GetContextResponse, ClearContextRequest, ContextOpResult, ClientEvent, RuntimeEvent, DispatchRequest, DispatchResponse, TerminateRequest, TerminateResponse } from './types.js';
/** Node-style callback for a unary RPC: receives an error or the response value. */
export type UnaryCallback<T> = (err: ServiceError | null, value?: T) => void;
/** Strongly-typed client for the Zero Runtime agent service; unary RPCs are callback-style, streaming RPCs return a duplex stream. */
export interface AgentRuntimeClient extends grpc.Client {
    /** Create a new agent session from the given configuration. */
    CreateSession(request: SessionConfig, callback: UnaryCallback<CreateSessionResponse>): ClientUnaryCall;
    CreateSession(request: SessionConfig, metadata: Metadata, callback: UnaryCallback<CreateSessionResponse>): ClientUnaryCall;
    CreateSession(request: SessionConfig, metadata: Metadata, options: Partial<CallOptions>, callback: UnaryCallback<CreateSessionResponse>): ClientUnaryCall;
    /** Destroy an existing session, ending the call. */
    DestroySession(request: DestroyRequest, callback: UnaryCallback<DestroyResponse>): ClientUnaryCall;
    DestroySession(request: DestroyRequest, metadata: Metadata, callback: UnaryCallback<DestroyResponse>): ClientUnaryCall;
    DestroySession(request: DestroyRequest, metadata: Metadata, options: Partial<CallOptions>, callback: UnaryCallback<DestroyResponse>): ClientUnaryCall;
    /** Fetch the current state and metadata of a session. */
    GetSessionInfo(request: SessionInfoRequest, callback: UnaryCallback<SessionInfo>): ClientUnaryCall;
    GetSessionInfo(request: SessionInfoRequest, metadata: Metadata, callback: UnaryCallback<SessionInfo>): ClientUnaryCall;
    GetSessionInfo(request: SessionInfoRequest, metadata: Metadata, options: Partial<CallOptions>, callback: UnaryCallback<SessionInfo>): ClientUnaryCall;
    /** Check service health, including active vs. maximum session counts. */
    Health(request: HealthRequest, callback: UnaryCallback<HealthResponse>): ClientUnaryCall;
    Health(request: HealthRequest, metadata: Metadata, callback: UnaryCallback<HealthResponse>): ClientUnaryCall;
    Health(request: HealthRequest, metadata: Metadata, options: Partial<CallOptions>, callback: UnaryCallback<HealthResponse>): ClientUnaryCall;
    /** Insert a message into a session's conversation context. */
    InjectMessage(request: InjectMessageRequest, callback: UnaryCallback<ContextOpResult>): ClientUnaryCall;
    InjectMessage(request: InjectMessageRequest, metadata: Metadata, callback: UnaryCallback<ContextOpResult>): ClientUnaryCall;
    InjectMessage(request: InjectMessageRequest, metadata: Metadata, options: Partial<CallOptions>, callback: UnaryCallback<ContextOpResult>): ClientUnaryCall;
    /** Remove a message from a session's conversation context by id. */
    RemoveMessage(request: RemoveMessageRequest, callback: UnaryCallback<ContextOpResult>): ClientUnaryCall;
    RemoveMessage(request: RemoveMessageRequest, metadata: Metadata, callback: UnaryCallback<ContextOpResult>): ClientUnaryCall;
    RemoveMessage(request: RemoveMessageRequest, metadata: Metadata, options: Partial<CallOptions>, callback: UnaryCallback<ContextOpResult>): ClientUnaryCall;
    /** Retrieve a session's conversation context (optionally the last N messages). */
    GetContext(request: GetContextRequest, callback: UnaryCallback<GetContextResponse>): ClientUnaryCall;
    GetContext(request: GetContextRequest, metadata: Metadata, callback: UnaryCallback<GetContextResponse>): ClientUnaryCall;
    GetContext(request: GetContextRequest, metadata: Metadata, options: Partial<CallOptions>, callback: UnaryCallback<GetContextResponse>): ClientUnaryCall;
    /** Clear a session's conversation context, optionally keeping the system prompt. */
    ClearContext(request: ClearContextRequest, callback: UnaryCallback<ContextOpResult>): ClientUnaryCall;
    ClearContext(request: ClearContextRequest, metadata: Metadata, callback: UnaryCallback<ContextOpResult>): ClientUnaryCall;
    ClearContext(request: ClearContextRequest, metadata: Metadata, options: Partial<CallOptions>, callback: UnaryCallback<ContextOpResult>): ClientUnaryCall;
    /** Bidirectional event stream: send {@link ClientEvent}s, receive {@link RuntimeEvent}s. */
    EventStream(metadata?: Metadata, options?: Partial<CallOptions>): ClientDuplexStream<ClientEvent, RuntimeEvent>;
    EventStream(options?: Partial<CallOptions>): ClientDuplexStream<ClientEvent, RuntimeEvent>;
    /** Dispatch a session to a registered agent. */
    Dispatch(request: DispatchRequest, callback: UnaryCallback<DispatchResponse>): ClientUnaryCall;
    Dispatch(request: DispatchRequest, metadata: Metadata, callback: UnaryCallback<DispatchResponse>): ClientUnaryCall;
    Dispatch(request: DispatchRequest, metadata: Metadata, options: Partial<CallOptions>, callback: UnaryCallback<DispatchResponse>): ClientUnaryCall;
    /** Terminate a dispatched session. */
    Terminate(request: TerminateRequest, callback: UnaryCallback<TerminateResponse>): ClientUnaryCall;
    Terminate(request: TerminateRequest, metadata: Metadata, callback: UnaryCallback<TerminateResponse>): ClientUnaryCall;
    Terminate(request: TerminateRequest, metadata: Metadata, options: Partial<CallOptions>, callback: UnaryCallback<TerminateResponse>): ClientUnaryCall;
}
/** Constructor for {@link AgentRuntimeClient}: `(address, credentials, options?)`. */
export interface AgentRuntimeClientConstructor {
    new (address: string, credentials: ChannelCredentials, options?: Partial<ClientOptions>): AgentRuntimeClient;
    service: ServiceDefinition;
}
/** @internal Build/cache the client constructor from the loaded descriptor; prefer {@link createAgentRuntimeClient}. */
export declare function getAgentRuntimeClientConstructor(): AgentRuntimeClientConstructor;
/** Options for {@link createAgentRuntimeClient}. */
export interface CreateClientOptions {
    /** Explicit credentials; if omitted, {@link selectChannelCredentials} uses `insecure`. */
    credentials?: ChannelCredentials;
    /** Plaintext vs TLS when `credentials` is unset. Defaults to TLS. */
    insecure?: boolean;
    /** Additional channel/client transport options (keep-alive, max message size, ...). */
    channelOptions?: Partial<ClientOptions>;
}
/** @internal Select channel credentials: TLS by default, plaintext when `insecure`. */
export declare function selectChannelCredentials(insecure?: boolean): ChannelCredentials;
/** Create an {@link AgentRuntimeClient} at `address`; credentials from `options.credentials` else {@link selectChannelCredentials}. */
export declare function createAgentRuntimeClient(address: string, options?: CreateClientOptions): AgentRuntimeClient;
export type { ClientDuplexStream, ClientReadableStream, ClientUnaryCall, ChannelCredentials };