type FrontendActionArgs = Record<string, unknown> & { __frontend_action_call_id?: string; reason?: string };

const internalBaseUrl = process.env.TJWATER_AGENT_INTERNAL_BASE_URL ?? "http://127.0.0.1:8787";
const internalToken = process.env.TJWATER_AGENT_INTERNAL_TOKEN ?? "";

export const executeFrontendAction = async (
  name: string,
  args: FrontendActionArgs,
  context: { sessionID: string },
) => {
  const callId = args.__frontend_action_call_id;
  if (!callId) throw new Error("frontend action bridge did not inject the OpenCode call ID");
  const { __frontend_action_call_id: _callId, reason, ...params } = args;
  let response: Response;
  try {
    response = await fetch(`${internalBaseUrl}/internal/frontend-actions/request`, {
      method: "POST",
      headers: { "Content-Type": "application/json", "x-agent-internal-token": internalToken },
      body: JSON.stringify({ session_id: context.sessionID, call_id: callId, name, params, fallback_text: reason }),
    });
  } catch (error) {
    throw new Error(`frontend action bridge unavailable: ${error instanceof Error ? error.message : String(error)}`);
  }
  const text = await response.text();
  if (!response.ok) throw new Error(`frontend action bridge rejected request (${response.status}): ${text}`);
  return text;
};