import { TRPCError } from "@trpc/server";
import { BotInSession } from "indite-js/schemas";

export const getFirstEdgeId = ({
  bot,
  startEventId,
}: {
  bot: Pick<BotInSession, "events" | "groups" | "version">;
  startEventId: string | undefined;
}) => {
  if (startEventId) {
    const event = bot.events?.find((e) => e.id === startEventId);
    if (!event)
      throw new TRPCError({
        code: "BAD_REQUEST",
        message: "Start event doesn't exist",
      });
    return event.outgoingEdgeId;
  }
  if (bot.version === "6") return bot.events?.[0].outgoingEdgeId;
  return bot.groups.at(0)?.blocks.at(0)?.outgoingEdgeId;
};