import bcrypt from 'bcryptjs'
import { prisma } from '@/lib/prisma'

export async function registerUser(username: string, password: string) {
  const existing = await prisma.user.findUnique({ where: { username } })
  if (existing) {
    return { error: 'Gebruikersnaam is al in gebruik' }
  }

  if (password.length < 8) {
    return { error: 'Wachtwoord moet minimaal 8 tekens bevatten' }
  }

  const password_hash = await bcrypt.hash(password, 12)
  const user = await prisma.user.create({
    data: {
      username,
      password_hash,
      roles: { create: [{ role: 'DEVELOPER' }] },
    },
  })

  return { user }
}

export async function verifyUser(username: string, password: string) {
  const user = await prisma.user.findUnique({ where: { username } })
  if (!user) return null

  const valid = await bcrypt.compare(password, user.password_hash)
  if (!valid) return null

  return user
}