import { type NextRequest, NextResponse } from "next/server";

import {
  CAREGIVER_SESSION_COOKIE,
  createCaregiverSessionCookieValue,
  getCaregiverSession,
} from "@/lib/session";
import { prisma } from "@/lib/prisma";

function normalizeRedirectPath(redirectTo?: string | null) {
  if (!redirectTo || !redirectTo.startsWith("/") || redirectTo.startsWith("//")) {
    return "/";
  }

  return redirectTo;
}

export async function GET(request: NextRequest) {
  const redirectTo = normalizeRedirectPath(
    request.nextUrl.searchParams.get("redirectTo"),
  );
  const existingCaregiver = await getCaregiverSession();
  const response = NextResponse.redirect(new URL(redirectTo, request.url));

  if (existingCaregiver) {
    return response;
  }

  const { sessionToken, options } = createCaregiverSessionCookieValue();

  await prisma.caregiverAccount.upsert({
    where: { sessionToken },
    update: {},
    create: { sessionToken },
  });

  response.cookies.set({
    name: CAREGIVER_SESSION_COOKIE,
    value: sessionToken,
    ...options,
  });

  return response;
}