/**
 * YOU PROBABLY DON'T NEED TO EDIT THIS FILE, UNLESS:
 * 1. You want to modify request context (see Part 1).
 * 2. You want to create a new middleware or type of procedure (see Part 3).
 *
 * TL;DR - This is where all the tRPC server stuff is created and plugged in. The pieces you will
 * need to use are documented accordingly near the end.
 */
/* eslint-disable @typescript-eslint/ban-ts-comment */
import { initTRPC, TRPCError } from "@trpc/server";
import { type NextRequest } from "next/server";
import superjson from "superjson";
import { ZodError } from "zod";

import { getServerAuthSession } from "~/server/auth";
import { db } from "~/server/db";

/**
 * 1. CONTEXT
 *
 * This section defines the "contexts" that are available in the backend API.
 *
 * These allow you to access things when processing a request, like the database, the session, etc.
 */

interface CreateContextOptions {
  headers: Headers;
}

/**
 * This helper generates the "internals" for a tRPC context. If you need to use it, you can export
 * it from here.
 *
 * Examples of things you may need it for:
 * - testing, so we don't have to mock Next.js' req/res
 * - tRPC's `createSSGHelpers`, where we don't have req/res
 *
 * @see https://create.t3.gg/en/usage/trpc#-serverapitrpcts
 */
export const createInnerTRPCContext = async (opts: CreateContextOptions) => {
  const session = await getServerAuthSession();

  return {
    session,
    headers: opts.headers,
    db,
  };
};

/**
 * This is the actual context you will use in your router. It will be used to process every request
 * that goes through your tRPC endpoint.
 *
 * @see https://trpc.io/docs/context
 */
export const createTRPCContext = async (opts: { req: NextRequest }) => {
  // Fetch stuff that depends on the request

  return await createInnerTRPCContext({
    headers: opts.req.headers,
  });
};

/**
 * 2. INITIALIZATION
 *
 * This is where the tRPC API is initialized, connecting the context and transformer. We also parse
 * ZodErrors so that you get typesafety on the frontend if your procedure fails due to validation
 * errors on the backend.
 */

const t = initTRPC.context<typeof createTRPCContext>().create({
  transformer: superjson,
  errorFormatter({ shape, error }) {
    return {
      ...shape,
      data: {
        ...shape.data,
        zodError:
          error.cause instanceof ZodError ? error.cause.flatten() : null,
      },
    };
  },
});

/**
 * 3. ROUTER & PROCEDURE (THE IMPORTANT BIT)
 *
 * These are the pieces you use to build your tRPC API. You should import these a lot in the
 * "/src/server/api/routers" directory.
 */

/**
 * This is how you create new routers and sub-routers in your tRPC API.
 *
 * @see https://trpc.io/docs/router
 */
export const createTRPCRouter = t.router;

/**
 * Public (unauthenticated) procedure
 *
 * This is the base piece you use to build new queries and mutations on your tRPC API. It does not
 * guarantee that a user querying is authorized, but you can still access user session data if they
 * are logged in.
 */
export const publicProcedure = t.procedure;

/** Reusable middleware that enforces users are logged in before running the procedure. */
const enforceUserIsAuthed = t.middleware(async ({ ctx, next }) => {
  const token = ctx.headers.get('authorization')?.split(' ')[1]
  // @ts-ignore
  var apitoken = undefined

  if (token) {
    apitoken = await ctx.db.aPIToken.findFirst({
      where: { token: token},
      select: {
        user: true,
      }
    });
  }

  if ((!ctx.session || !ctx.session.user) && !apitoken) {
    throw new TRPCError({ code: "UNAUTHORIZED" });
  }

  const userId = ctx.session?.user.id || apitoken?.user.id
  await ctx.db.$transaction(async () => {
    const existingMembership = await ctx.db.membership.findFirst({
      where: { userId: userId },
    });

    if (existingMembership) {
      return existingMembership;
    }
    
    const teamName = `Vibranium_${Math.random().toString(16)}`
    const newTeam = await prisma.team.create({
      data: {
        name: teamName
      },
    });

    const newMembership = await prisma.membership.create({
      data: {
        userId: userId,
        teamId: newTeam.id,
        role: 'OWNER',
      },
    });

    return newMembership;
  })

  return next({
    ctx: {
      // infers the `session` as non-nullable
      // @ts-ignore
      session: { ...ctx.session, user: ctx.session?.user || apitoken?.user },
    },
  });
});

/**
 * Protected (authenticated) procedure
 *
 * If you want a query or mutation to ONLY be accessible to logged in users, use this. It verifies
 * the session is valid and guarantees `ctx.session.user` is not null.
 *
 * @see https://trpc.io/docs/procedures
 */
export const protectedProcedure = t.procedure.use(enforceUserIsAuthed);
