import { CancellationToken, PreferenceService } from '@theia/core';
import { WorkspaceService } from '@theia/workspace/lib/browser';
import type { ThreadEvent } from '@openai/codex-sdk';
import { CodexClient, CodexRequest, CodexService } from '../common';
export declare class CodexClientImpl implements CodexClient {
    protected tokenHandlers: Map<string, (token?: ThreadEvent) => void>;
    protected errorHandlers: Map<string, (error: Error) => void>;
    /**
     * `undefined` token signals end of stream per RPC protocol.
     */
    sendToken(streamId: string, token?: ThreadEvent): void;
    sendError(streamId: string, error: Error): void;
    registerTokenHandler(streamId: string, handler: (token?: ThreadEvent) => void): void;
    registerErrorHandler(streamId: string, handler: (error: Error) => void): void;
    unregisterHandlers(streamId: string): void;
}
interface StreamState {
    id: string;
    tokens: (ThreadEvent | undefined)[];
    isComplete: boolean;
    hasError: boolean;
    error?: Error;
    pendingResolve?: () => void;
    pendingReject?: (error: Error) => void;
}
export declare class CodexFrontendService {
    protected readonly backendService: CodexService;
    protected readonly client: CodexClientImpl;
    protected readonly preferenceService: PreferenceService;
    protected readonly workspaceService: WorkspaceService;
    protected streams: Map<string, StreamState>;
    send(request: CodexRequest, cancellationToken?: CancellationToken): Promise<AsyncIterable<ThreadEvent>>;
    protected generateStreamId(): string;
    protected setupStreamHandlers(streamState: StreamState): void;
    protected createAsyncIterable(streamState: StreamState): AsyncIterable<ThreadEvent>;
    protected cleanup(streamId: string): void;
    /**
     * Fallback hierarchy:
     * 1. Codex-specific API key (highest priority)
     * 2. Shared OpenAI API key
     * 3. undefined (backend will check OPENAI_API_KEY env var)
     */
    protected getApiKey(): string | undefined;
    protected getWorkspaceRoot(): Promise<string | undefined>;
}
export {};
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