import { UIMessage } from "ai";
import { Unstable_InteractableSnapshotEntry } from "@assistant-ui/core";

//#region src/injectInteractableContext.d.ts
/**
 * Injects interactable state snapshots into messages as model-visible text.
 *
 * Mirrors {@link injectQuoteContext}: reads the frozen snapshot stamped on a user
 * message's `metadata.custom.interactables` (by the interactables scope at send
 * time) and prepends a text part. Run this in your route handler before
 * `convertToModelMessages`, which otherwise ignores `metadata.custom`.
 *
 * Wording is consumer-owned — pass `format` to control how each snapshot reads.
 * A snapshot may originate from a user edit or an agent `update_*` call, so the
 * default phrasing is neutral. Keep the instance id visible in custom wording:
 * the model needs it to address the `update_*` tool's `id` parameter. A custom
 * `format` must also handle entries with `partial: true`, whose `state` carries
 * only the fields that changed since the model's last known state.
 *
 * @example
 * ```ts
 * import { convertToModelMessages, streamText } from "ai";
 * import { unstable_injectInteractableContext } from "@assistant-ui/react-ai-sdk";
 *
 * export async function POST(req: Request) {
 *   const { messages } = await req.json();
 *   const result = streamText({
 *     model: myModel,
 *     messages: await convertToModelMessages(unstable_injectInteractableContext(messages)),
 *   });
 *   return result.toUIMessageStreamResponse();
 * }
 * ```
 */
declare function unstable_injectInteractableContext(messages: UIMessage[], format?: (item: Unstable_InteractableSnapshotEntry) => string): UIMessage[];
//#endregion
export { unstable_injectInteractableContext };
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