import type { OAuth2Client } from "google-auth-library";
import type { LLMProvider, Message, ProviderValidateResult } from "./provider.js";
import { type GoogleOAuthTokens } from "./google-oauth.js";
type GoogleAuthMethod = "apiKey" | "oauth";
type GoogleProviderOptions = {
    apiKey?: string;
    authMethod?: GoogleAuthMethod;
    model?: string;
    validateTimeoutMs?: number;
    oauthClient?: OAuth2Client;
    onOAuthTokens?: (tokens: GoogleOAuthTokens) => void;
};
export declare class GoogleProvider implements LLMProvider {
    readonly name = "Google";
    private client;
    private model;
    private authMethod;
    private validateTimeoutMs;
    private oauthClient?;
    private onOAuthTokens;
    constructor(apiKeyOrOptions: string | GoogleProviderOptions, model?: string);
    chat(messages: Message[], systemPrompt: string, maxTokens?: number): Promise<string>;
    chatStream(messages: Message[], systemPrompt: string, onToken: (token: string) => void): Promise<string>;
    chatJSON<T = unknown>(messages: Message[], systemPrompt: string, schema?: object): Promise<T>;
    validate(): Promise<ProviderValidateResult>;
    private withOAuthRetry;
}
export {};
//# sourceMappingURL=google.d.ts.map