import { useCopilotKit } from "../providers/CopilotKitProvider.mjs";
import { defineToolCallRenderer } from "../types/defineToolCallRenderer.mjs";
import { useEffect } from "react";

//#region src/hooks/use-render-tool.tsx
const EMPTY_DEPS = [];
/**
* Registers a renderer entry in CopilotKit's `renderToolCalls` registry.
*
* Key behavior:
* - deduplicates by `agentId:name` (latest registration wins),
* - keeps renderer entries on cleanup so historical chat tool calls can still render,
* - refreshes registration when `deps` change.
*
* @typeParam S - Schema type describing tool call parameters.
* @param config - Renderer config for wildcard or named tools.
* @param deps - Optional dependencies to refresh registration.
*
* @example
* ```tsx
* useRenderTool(
*   {
*     name: "searchDocs",
*     parameters: z.object({ query: z.string() }),
*     render: ({ status, parameters, result }) => {
*       if (status === "executing") return <div>Searching {parameters.query}</div>;
*       if (status === "complete") return <div>{result}</div>;
*       return <div>Preparing...</div>;
*     },
*   },
*   [],
* );
* ```
*
* @example
* ```tsx
* useRenderTool(
*   {
*     name: "summarize",
*     parameters: z.object({ text: z.string() }),
*     agentId: "research-agent",
*     render: ({ name, status }) => <div>{name}: {status}</div>,
*   },
*   [selectedAgentId],
* );
* ```
*/
function useRenderTool(config, deps) {
	const { copilotkit } = useCopilotKit();
	const extraDeps = deps ?? EMPTY_DEPS;
	useEffect(() => {
		const renderer = config.name === "*" && !config.parameters ? defineToolCallRenderer({
			name: "*",
			render: (props) => config.render({
				...props,
				parameters: props.args
			}),
			...config.agentId ? { agentId: config.agentId } : {}
		}) : defineToolCallRenderer({
			name: config.name,
			args: config.parameters,
			render: (props) => config.render({
				...props,
				parameters: props.args
			}),
			...config.agentId ? { agentId: config.agentId } : {}
		});
		copilotkit.addHookRenderToolCall(renderer);
	}, [
		config.name,
		copilotkit,
		extraDeps.length,
		...extraDeps
	]);
}

//#endregion
export { useRenderTool };
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