import 'server-only';
import { cache } from 'react';
import { headers } from 'next/headers';
import {
  appRouter,
  createCallerFactory,
  createTRPCContext,
  type AppRouter,
} from '@repo/api';
import type { inferRouterInputs, inferRouterOutputs } from '@trpc/server';
import { resolveUser } from '../auth';

/**
 * RSC-side tRPC caller. Bypasses HTTP — runs the router directly inside the
 * server component. Use this for reads in Server Components / Server Actions.
 *
 * For client-side reads/mutations, see `./client.ts` (TanStack Query hooks).
 */
const createContext = cache(async () => {
  const user = await resolveUser();
  const h = await headers();
  return createTRPCContext({ user, headers: h });
});

const createCaller = createCallerFactory(appRouter);

export const api = createCaller(createContext);

export type RouterInputs = inferRouterInputs<AppRouter>;
export type RouterOutputs = inferRouterOutputs<AppRouter>;