import { convertToModelMessages, streamText, type LanguageModel, type UIMessage, type UIMessageStreamOptions } from "ai";
type AIStreamTextFunction = typeof streamText;
type AIConvertToModelMessagesFunction = typeof convertToModelMessages;
type AIStreamTextInput = Parameters<AIStreamTextFunction>[0];
type AIConvertToModelMessagesOptions = NonNullable<Parameters<AIConvertToModelMessagesFunction>[1]>;
export interface AIChatRequestBody<TMessage = Omit<UIMessage, "id">> {
    messages: TMessage[];
    [key: string]: unknown;
}
export interface AIChatValidationIssue {
    path: readonly (string | number)[];
    code: string;
    message: string;
}
export type AIChatStreamTextOptions = Partial<Omit<AIStreamTextInput, "model" | "messages" | "prompt">>;
export type AIChatResponseOptions = ResponseInit & UIMessageStreamOptions<UIMessage> & {
    consumeSseStream?: (options: {
        stream: ReadableStream<string>;
    }) => PromiseLike<void> | void;
};
export interface AIChatPrepareContext<TBody extends AIChatRequestBody = AIChatRequestBody> {
    request: Request;
    body: TBody;
    messages: unknown[];
    modelMessages: Awaited<ReturnType<AIConvertToModelMessagesFunction>>;
}
export interface AIChatRouteOptions<TBody extends AIChatRequestBody = AIChatRequestBody> {
    model: LanguageModel;
    system?: AIStreamTextInput["system"];
    instructions?: AIStreamTextInput["instructions"];
    streamText?: AIStreamTextFunction;
    convertToModelMessages?: AIConvertToModelMessagesFunction;
    convertToModelMessagesOptions?: AIConvertToModelMessagesOptions;
    options?: AIChatStreamTextOptions;
    responseOptions?: AIChatResponseOptions | ((context: AIChatPrepareContext<TBody>) => AIChatResponseOptions | Promise<AIChatResponseOptions>);
    selectMessages?: (body: TBody, request: Request) => unknown[];
    prepare?: (context: AIChatPrepareContext<TBody>) => AIChatStreamTextOptions | Promise<AIChatStreamTextOptions>;
}
type AIChatRequestBodySchema = {
    parse(value: unknown): AIChatRequestBody;
    safeParse(value: unknown): {
        success: true;
        data: AIChatRequestBody;
    } | {
        success: false;
        error: {
            issues: AIChatValidationIssue[];
        };
    };
};
export declare const aiChatRequestBodySchema: AIChatRequestBodySchema;
/**
 * Create a Vercel AI SDK chat route for Farm's Next-style app/api convention.
 *
 * // src/app/api/chat/route.ts
 * export const POST = aiChatRoute({ model: "openai/gpt-4o-mini" });
 */
export declare function aiChatRoute<TBody extends AIChatRequestBody = AIChatRequestBody>(input: AIChatRouteOptions<TBody>): import("@farm.js/core").FarmTypedEndpoint<AIChatRequestBody<Omit<UIMessage<unknown, import("ai").UIDataTypes, import("ai").UITools>, "id">>, unknown, Response>;
export declare const createAIChatRoute: typeof aiChatRoute;
export declare const defineAIChatRoute: typeof aiChatRoute;
export {};
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