import type { ChatMessageMetadata, ChatUiMessageChunk } from "../../chat/protocol.js";
import type { AgUiChunkEncoder } from "./chunk-encoder.js";
import { type AgUiEncoderStateOptions, type AgUiRunFinishedMetadata, type AgUiRuntimeStreamEvent } from "./encoder.js";
import { type CreateAgUiTrackedResponseInput } from "./tracked-response.js";
/** Public API contract for AG-UI chat UI chunk encoder. */
export type AgUiChatUiChunkEncoder = Pick<AgUiChunkEncoder<ChatUiMessageChunk<ChatMessageMetadata>>, "encode" | "finalize" | "timingState">;
/** Options accepted by create AG-UI chat UI chunk encoder. */
export interface CreateAgUiChatUiChunkEncoderOptions {
    /**
     * Timing clocks forwarded verbatim to the encoder state. A single object so
     * that adding a clock is one edit in `AgUiEncoderStateOptions`, not a
     * sweep through every wrapper that happens to sit in between.
     */
    timing?: AgUiEncoderStateOptions;
    modelId?: string;
    resolveProvider?: (modelId: string) => string | undefined;
}
/** Input payload for create AG-UI chat UI tracked response. */
export interface CreateAgUiChatUiTrackedResponseInput extends Omit<CreateAgUiTrackedResponseInput<ChatUiMessageChunk<ChatMessageMetadata>>, "chunkEncoder" | "finalizeTracker"> {
    modelId: string;
    resolveProvider?: CreateAgUiChatUiChunkEncoderOptions["resolveProvider"];
}
/** Return AG-UI chat UI message metadata from chunk. */
export declare function getAgUiChatUiMessageMetadataFromChunk(chunk: ChatUiMessageChunk<ChatMessageMetadata>): ChatMessageMetadata | undefined;
/** Return AG-UI chat UI message usage metadata. */
export declare function getAgUiChatUiMessageUsageMetadata(messageMetadata: ChatMessageMetadata | undefined): Pick<AgUiRunFinishedMetadata, "inputTokens" | "outputTokens" | "totalTokens" | "cachedInputTokens" | "cacheCreationInputTokens" | "cacheReadInputTokens" | "reasoningTokens">;
/** Return AG-UI chat UI message chunk metadata. */
export declare function getAgUiChatUiMessageChunkMetadata(chunk: ChatUiMessageChunk<ChatMessageMetadata>, options?: Pick<CreateAgUiChatUiChunkEncoderOptions, "resolveProvider">): Partial<AgUiRunFinishedMetadata> | null;
/** Event emitted for normalize chat UI message chunk to AG-UI runtime. */
export declare function normalizeChatUiMessageChunkToAgUiRuntimeEvent(chunk: ChatUiMessageChunk<ChatMessageMetadata>): AgUiRuntimeStreamEvent;
/** Create AG-UI chat UI chunk encoder. */
export declare function createAgUiChatUiChunkEncoder(options?: CreateAgUiChatUiChunkEncoderOptions): AgUiChatUiChunkEncoder;
/** Response payload for create AG-UI chat UI tracked response. */
export declare function createAgUiChatUiTrackedResponse(input: CreateAgUiChatUiTrackedResponseInput): Response;
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