import { BaseChatModel, type BaseChatModelParams } from "@langchain/core/language_models/chat_models";
import type { ArcjetSensitiveInfoType, RedactOptions } from "@arcjet/redact";
import { CallbackManagerForLLMRun } from "@langchain/core/callbacks/manager";
import { BaseMessage } from "@langchain/core/messages";
import { ChatResult } from "@langchain/core/outputs";
type DetectSensitiveInfoEntities<T> = (tokens: string[]) => Array<ArcjetSensitiveInfoType | T | undefined>;
type ValidEntities<Detect> = Array<undefined extends Detect ? ArcjetSensitiveInfoType : Detect extends DetectSensitiveInfoEntities<infer CustomEntities> ? ArcjetSensitiveInfoType | CustomEntities : never>;
export interface ArcjetRedactOptions<Detect> extends BaseChatModelParams {
    chatModel: BaseChatModel;
    entities?: ValidEntities<Detect>;
    contextWindowSize?: number;
    detect?: Detect;
    replace?: (entity: ValidEntities<Detect>[number]) => string | undefined;
}
export type { ArcjetSensitiveInfoType, RedactOptions };
export declare class ArcjetRedact<Detect extends DetectSensitiveInfoEntities<CustomEntities> | undefined, CustomEntities extends string> extends BaseChatModel {
    static lc_name(): string;
    chatModel: BaseChatModel;
    entities?: ValidEntities<Detect>;
    contextWindowSize?: number;
    detect?: Detect;
    replace?: (entity: ValidEntities<Detect>[number]) => string | undefined;
    index: number;
    constructor(options: ArcjetRedactOptions<Detect>);
    _createUniqueReplacement(entity: ValidEntities<Detect>[number]): string;
    _llmType(): string;
    _generate(messages: BaseMessage[], options: this["ParsedCallOptions"], runManager?: CallbackManagerForLLMRun | undefined): Promise<ChatResult>;
}