import { httpBatchLink, loggerLink } from "@trpc/client";

import { createTRPCNext } from "@trpc/next";

import { type inferRouterInputs, type inferRouterOutputs } from "@trpc/server";

import superjson from "superjson";

import { type AppRouter } from "@/server/api/router";

const getBaseUrl = () => {

if (typeof window !== "undefined") return ""; // browser should use relative url

if (process.env.DOMAIN_NAME) return `https://${process.env.DOMAIN_NAME}`; // SSR should use Domain name or vercel url on Vercel

if (process.env.VERCEL_URL) return `https://${process.env.VERCEL_URL}`;

return `http://localhost:${process.env.PORT ?? 3000}`; // dev SSR should use localhost

};

export const trpc = createTRPCNext<AppRouter>({

transformer: superjson,

config() {

return {

links: [

loggerLink({

enabled: (opts) =>

process.env.NODE_ENV === "development" ||

(opts.direction === "down" && opts.result instanceof Error),

}),

httpBatchLink({

transformer: superjson,

url: `${getBaseUrl()}/api/trpc`,

}),

],

};

},

ssr: false,

});

/**

* Inference helper for inputs

* @example type HelloInput = RouterInputs['example']['hello']

**/

export type RouterInputs = inferRouterInputs<AppRouter>;

/**

* Inference helper for outputs

* @example type HelloOutput = RouterOutputs['example']['hello']

**/

export type RouterOutputs = inferRouterOutputs<AppRouter>;