import type { ChatCompletionResponse, ChatCompletionToolChoice } from './provider';
import type { BaseMessage } from '@langchain/core/messages';
import { AIMessage } from '@langchain/core/messages';
interface OpenAISystemMessage {
    role: 'system';
    content: string | null;
}
interface OpenAIUserMessage {
    role: 'user';
    content: string | null;
}
interface OpenAIAssistantMessage {
    role: 'assistant';
    content: string | null;
    tool_calls?: Array<{
        id: string;
        function: {
            name: string;
            arguments: string;
        };
    }>;
}
interface OpenAIToolMessage {
    role: 'tool';
    content: string | null;
    tool_call_id: string;
}
export type OpenAIMessage = OpenAISystemMessage | OpenAIUserMessage | OpenAIAssistantMessage | OpenAIToolMessage;
export type LangChainToolChoice = 'auto' | 'any' | 'none' | {
    type: 'tool';
    name: string;
} | undefined;
/** Handles generic format conversions between OpenAI and LangChain. */
export declare class LangChainAdapter {
    /** Convert OpenAI-format messages to LangChain messages. */
    static convertMessages(messages: OpenAIMessage[]): BaseMessage[];
    /** Convert a LangChain AIMessage to an OpenAI-compatible ChatCompletionResponse. */
    static convertResponse(response: AIMessage, modelName: string | null): ChatCompletionResponse;
    /** Convert OpenAI tool_choice to LangChain format. */
    static convertToolChoice(toolChoice: ChatCompletionToolChoice | undefined): LangChainToolChoice;
    private static extractTextContent;
    private static parseToolArguments;
}
export {};
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