/**
 * Adapters for converting between Strands SDK types and Gemini API format.
 *
 * @internal This module is not part of the public API.
 */
import { type Content, type GenerateContentResponse, FinishReason as GeminiFinishReason } from '@google/genai';
import type { Message, StopReason } from '../../types/messages.js';
import type { ModelStreamEvent } from '../streaming.js';
import type { GoogleStreamState } from './types.js';
/**
 * Mapping of Gemini finish reasons to SDK stop reasons.
 * Only MAX_TOKENS needs explicit mapping; everything else defaults to endTurn.
 * Tool use stop reason is determined by the hasToolCalls flag in GoogleStreamState,
 * since Gemini does not have a tool use finish reason.
 *
 * @internal
 */
export declare const FINISH_REASON_MAP: Partial<Record<GeminiFinishReason, StopReason>>;
/**
 * Formats an array of messages for the Gemini API.
 *
 * @param messages - SDK messages to format
 * @returns Gemini-formatted contents array
 *
 * @internal
 */
export declare function formatMessages(messages: Message[]): Content[];
/**
 * Maps a Gemini response chunk to SDK streaming events.
 *
 * @param chunk - Gemini response chunk
 * @param streamState - Mutable state object tracking message and content block state
 * @returns Array of SDK streaming events
 *
 * @internal
 */
export declare function mapChunkToEvents(chunk: GenerateContentResponse, streamState: GoogleStreamState): ModelStreamEvent[];
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