import { z } from "zod";
import { ROLES } from "@/lib/constants";
import { uuid } from "@/lib/crypto";
import { hashPassword } from "@/lib/password";
import { parseRequest } from "@/lib/request";
import { badRequest, json, unauthorized } from "@/lib/response";
import { canCreateUser } from "@/permissions";
import { createUser, getUserByUsername } from "@/queries/prisma";

export async function POST(request: Request) {
  const schema = z.object({
    id: z.uuid().optional(),
    username: z.string().max(255),
    password: z.string(),
    role: z.string().regex(/admin|user|view-only/i),
  });

  const { auth, body, error } = await parseRequest(request, schema);

  if (error) {
    return error();
  }

  if (!(await canCreateUser(auth))) {
    return unauthorized();
  }

  const { id, username, password, role } = body;

  const existingUser = await getUserByUsername(username, {
    showDeleted: true,
  });

  if (existingUser) {
    return badRequest({ message: "User already exists" });
  }

  const user = await createUser({
    id: id || uuid(),
    username: username.toLowerCase(),
    password: hashPassword(password),
    role: role ?? ROLES.user,
  });

  return json(user);
}